I am using Java 1.4 and tomcat v4.0.
This is the code in my Dao:
private DataSource jdbcFactory;
public CommonDao() {
Context c = null;
if (this.jdbcFactory == null) {
try {
c= new InitialContext();
Context envCtx = (Context)c.lookup("java:comp/env");
this.jdbcFactory = (DataSource)envCtx.lookup("jdbc/mydb");
} catch (NamingException e) {
e.printStackTrace();
}
}
}
public String getParamValue(String param_name) throws SQLException, TestException {
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
String sqlString=null;
String param_value = null;
TestException fe = new TestException();
sqlString = "SELECT PARAM_VALUE " +
"FROM SAMPLE_TBL " +
"WHERE PARAM_NAME = '" + param_name + "' " ;
try {
conn = this.jdbcFactory.getConnection();
ps = conn.prepareStatement(sqlString);
rs = ps.executeQuery();
while (rs.next()) {
param_value = rs.getString("PARAM_VALUE");
}
} catch(SQLException e){
fe.setCallingObj("CommonDao.getParamValue");
fe.setErrorCode(e.getErrorCode());
fe.setErrorMessage(e.getMessage());
fe.setStackTrace(e.getStackTrace());
throw fe;
} catch (Exception e) {
e.printStackTrace();
} finally {
rs.close();
ps.close();
conn.close();
}
return param_value;
}
context.xml under META-INF:
<Context>
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<Resource name="jdbc/mydb" global="jdbc/mydb" auth="Container"
type="javax.sql.DataSource"
driverClassName="oracle.jdbc.driver.OracleDriver"
factory="org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory"
url="jdbc:oracle:thin:#somesitexxx:xxxx:XXXXXX"
username="someusername" password="somepass" maxActive="1000"
maxIdle="1000" maxWait="500" />
</Context>
web.xml under WEB-INF:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app id="WebApp_ID">
<servlet>
<servlet-name>LoginController</servlet-name>
<display-name>LoginController</display-name>
<description></description>
<servlet-class>com.Controller.LoginController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginController</servlet-name>
<url-pattern>/LoginController</url-pattern>
</servlet-mapping>
<resource-ref>
<res-ref-name>jdbc/rdcdb</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
I am using ojdbc7-12.1.0.2.jar as well but included or not I am still getting the NPE in conn = this.jdbcFactory.getConnection();
this.jdbcFactory -> is also null when debugging.
Can you help me which part I miss?
EDIT: I have now upgraded to java 8 and tomcat 7 and used ojdbc7-12.1.0.2.jar.
But I am still getting the NPE exception
updated error stacktrace:
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driver class 'oracle.jdbc.driver.driver.OracleDriver'
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1429)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1371)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
at com.Dao.CommonDao.getParamValue(CommonDao.java:72)
at com.Dao.CommonDao.checkAvailability(CommonDao.java:411)
at com.Controller.LoginController.processRequest(LoginController.java:114)
at com.Controller.LoginController.doGet(LoginController.java:64)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: oracle.jdbc.driver.driver.OracleDriver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1420)
... 27 more
Apr 28, 2022 3:16:40 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [LoginController] in context with path [/BV_PROBE] threw exception
java.lang.NullPointerException
at com.Dao.CommonDao.getParamValue(CommonDao.java:89)
at com.Dao.CommonDao.checkAvailability(CommonDao.java:411)
at com.Controller.LoginController.processRequest(LoginController.java:114)
at com.Controller.LoginController.doGet(LoginController.java:64)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
It catches SQLException: Cannot load JDBC driver class 'oracle.jdbc.driver.driver.OracleDriver'
Assuming that that is the only constructor ...
If jdbcFactory is null, that means that in the following code:
try {
c = new InitialContext();
Context envCtx = (Context) c.lookup("java:comp/env");
this.jdbcFactory = (DataSource) envCtx.lookup("jdbc/mydb");
} catch (NamingException e) {
e.printStackTrace();
}
either the second lookup call returned null or you threw and caught a NamingException. According to the Context javadocs, a lookup call may return null, it your application bound null to the name.
However ... on rereading your question, I noticed this:
I am using Java 1.4 and Tomcat v4.0.
These are truly ancient versions. Both are end-of-life. Tomcat 4 was end-of-life prior to 20121, and Java 1.4.2 in 2013. You are missing nearly 10 years worth of security patches.
And this:
I am using ojdbc7-12.1.0.2.jar
That is a driver for Java 7. I doubt that it will work with Java 1.4.
According to what I have read, you should be using an ojdbc.14 driver with Java 1.4. It is highly unlikely that you can find one that is compatible with a recent Oracle database.
1 - 2012 is when Tomcat 5 was officially end-of-life. The end-of-life for earlier versions was not formally announced. But the last patch release of Tomcat 4 was in 2009.
Related
This question already has answers here:
How to install JDBC driver in Eclipse web project without facing java.lang.ClassNotFoundexception
(13 answers)
Closed 6 years ago.
I know that's an over-asked question, but still I can't get this thing right.
I'm running a web application on Eclipse who has to interact with a mysql database. It all runs on a tomcat 7.0.27 server on localhost.
As much as I try to add my my mysql-connector-java-5.1.21-bin.jar to java build path, i still get the same error. Apparently it doesn't matter if I put it as an external lib or inside my Webcontent/META-INF/lib folder. Also tried different version of the connector (18 and 25).
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at ns.Data.getInfo(Data.java:36)
at org.apache.jsp.home_jsp._jspService(home_jsp.java:78)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
this is the class that calls the driver:
package ns;
import java.sql.*;
import java.util.*;
public class Data {
public Data() {
};
public int prova = 4;
{
try {
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://" + "127.0.0.1" + "/" + "test" + "?" + "user=" + "matt" + "&password=" + "pass");
Statement cmd = con.createStatement();
// TODO QUERY
ResultSet rs = cmd.executeQuery("SELECT * FROM carshare.passaggi");
con.close(); }
catch (Exception e) { System.out.println("Errore con DB o Query errata");
e.printStackTrace(); }
}
public String[] getInfo(String table, String column) {
String[] values = new String[100];
int i = 0;
String temp;
try {
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://" + "127.0.0.1" + "/" + "test" + "?" + "user=" + "matt" + "&password=" + "pass");
Statement cmd = con.createStatement();
// QUERY DA ESEGUIRE
ResultSet rs = cmd.executeQuery("SELECT * FROM carshare."+ table);
/*
while (rs.next()==true) {
temp = rs.getString(column);
System.out.print(temp);
values[i] = temp;
i++;
}
*/
con.close(); }
catch (Exception e) { System.out.println("Errore con DB o Query errata");
e.printStackTrace(); }
return values;
}
}
I'll welcome any advice or suggestion and will require additional info if needed.
It should be in your Webcontent/WEB-INF/lib folder not Webcontent/META-INF/lib
As my topic says, the max_allowed_packet variable is not working.
I have a project in eclipse which loads csv-files up and store them into a mysql database through a servlet. For files smaller than 1M it works fine.
But my file is 95Mb big, and i have increase the 'max_allow_packet' variable in the my.ini file in the section [mysqld] up to 500M.
But it doesen't work. Eclipse gives my the same error.
Please take a look at this two pictures:
ECLIPSE
my.ini
[mysqld]
....
Thanks for help
*****EDIT*****
com.mysql.jdbc.PacketTooBigException: Packet for query is too large (190104490 > 26214400). You can change this value on the server by setting the max_allowed_packet' variable.
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3540)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2417)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2582)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2535)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1911)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2145)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2081)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2066)
at upload.Upload.doPost(Upload.java:71)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
And this is the main-code where the file is upload and then store in mysql:
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
Part part = request.getPart("file");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
InputStream in = part.getInputStream();
CSV csv = new CSV();
String name = null;
String header = part.getHeader("content-disposition");
if(header.contains("filename"))
{
name = header.substring(header.lastIndexOf("=") + 1, header.length()).replace("\"", "");
}
int i = 0;
while((i = in.read()) != -1 )
{
baos.write(i);
}
csv.setCsvFile(baos.toByteArray());
csv.setName(name);
baos.flush();
try {
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
}
try {
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/loadcsvup","*****","*******");
PreparedStatement stmt = con.prepareStatement("INSERT INTO loadcsvup.csvfiles (csv_name,file) VALUES (?,?)");
stmt.setString(1, csv.getName());
stmt.setBytes(2, csv.getCsvFile());
stmt.executeUpdate();
stmt.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
***** EDIT 2 *****
Ok, now i have set the varibale also in de [client] section of the my.ini file. Seems to be work.
But now i got this error code:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: The size of BLOB/TEXT data inserted in one transaction is greater than 10% of redo log size. Increase the redo log size using innodb_log_file_size.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:389)
at com.mysql.jdbc.Util.getInstance(Util.java:372)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:980)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3835)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3771)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2435)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2582)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2535)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1911)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2145)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2081)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2066)
at upload.Upload.doPost(Upload.java:71)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
I've set the varibable like this:
[mysqld]
innodb_file_per_table=1
innodb_buffer_pool_size=1GB
innodb_log_file_size=128M
innodb_log_buffer_size=8M
Check points
Have you restarted mysql service after changing my.ini?
Run query SHOW GLOBAL VARIABLES LIKE 'max_allowed_packet' and see the value. It should be 500MB (Equal bytes)
If the above query does not return 500M, then try running SET GLOBAL max_allowed_packet = 500 * 1024 * 1024. Then repeat step 2.
If value is shown as 500 M repeat your file upload.
If still problem persists, then it could be like mysql is looking at different variable.
I am facing a problem while enabling zip file download in struts2 application.
here is my jsp page
<%# taglib prefix="s" uri="/struts-tags"%>
<s:url id="fileDownload" namespace="/" action="Download" ></s:url>
<h4>Download file - <s:a href="%{fileDownload}">MyFile.zip</s:a>
</h4>
and here is my action class
public class DownloadAction implements Action
{
List<String> fileList = new ArrayList<String>();
private String OUTPUT_ZIP_FILE = "C:\\Users\\Ankush\\Desktop\\MyFile.zip";
private String SOURCE_FOLDER ;
private FileOutputStream fos;
private InputStream fileInputStream;
public FileOutputStream getFos() {
return fos;
}
public void setFos(FileOutputStream fos) {
this.fos = fos;
}
private ZipOutputStream zos;
public String execute()
{
Map<String, Object> session = ActionContext.getContext().getSession();
System.out.println("DOWNLOAD ACTION path="+(session.get("BASIC_PATH").toString()+session.get("username").toString()+"\\"+session.get("course_Name").toString()));
this.setSOURCE_FOLDER(session.get("BASIC_PATH").toString()+session.get("username").toString()+"\\"+session.get("course_Name").toString());
System.out.println("ORIGINOL PATH="+"E:\\Z800\\WebAuthoringData\\EMMRC\\Ankush\\Raag_Durga");
this.generateFileList(new File(this.getSOURCE_FOLDER()));
this.zipIt(OUTPUT_ZIP_FILE);
return SUCCESS;
}
public InputStream getFileInputStream() {
return fileInputStream;
}
public ZipOutputStream getZos() {
return zos;
}
public void setZos(ZipOutputStream zos) {
this.zos = zos;
}
/**
* Zip it
* #param zipFile output ZIP file location
*/
public void zipIt(String zipFile){
byte[] buffer = new byte[1024];
try{
fos = new FileOutputStream(zipFile);
zos = new ZipOutputStream(fos);
System.out.println("Output to Zip : " + zipFile);
for(String file : this.fileList){
System.out.println("File Added : " + file);
ZipEntry ze= new ZipEntry(file);
zos.putNextEntry(ze);
fileInputStream =
new FileInputStream(SOURCE_FOLDER + File.separator + file);
int len;
while ((len = fileInputStream.read(buffer)) > 0) {
zos.write(buffer, 0, len);
}
}
fileInputStream.close();
fos.flush();
zos.flush();
zos.closeEntry();
//remember close it
zos.close();
fos.close();
System.out.println("Done");
}catch(IOException ex){
ex.printStackTrace();
}
}
and my struts.xml for this
<action name="Download" class="com.cdac.action.DownloadAction">
<result name="error">/WEB-INF/jsps/error.jsp</result>
<result name="success" type="stream">
<param name="contentType">application/zip</param>
<param name="inputName">fileInputStream</param>
<param name="contentDisposition">attachment;filename="MyFile.zip"</param>
<param name="bufferSize">2048</param>
</result>
</action>
and error log
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:626)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:215)
at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:105)
at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:125)
at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:118)
at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:182)
at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:123)
at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:80)
at org.apache.jsp.WEB_002dINF.jsps.error_jsp._jspService(error_jsp.java:82)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:419)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:593)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:530)
at org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:166)
at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:371)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:275)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:562)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Nov 18, 2014 3:54:05 PM com.opensymphony.xwork2.util.logging.commons.CommonsLogger error
SEVERE: Exception occurred during processing request: java.lang.IllegalStateException: getOutputStream() has already been called for this response
org.apache.jasper.JasperException: java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:534)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:452)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:593)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:530)
at org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:166)
at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:371)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:275)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:562)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:626)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:215)
at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:105)
at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:125)
at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:118)
at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:182)
at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:123)
at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:80)
at org.apache.jsp.WEB_002dINF.jsps.error_jsp._jspService(error_jsp.java:82)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:419)
... 32 more
Nov 18, 2014 3:54:05 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [default] in context with path [/web-authoring-tool] threw exception
java.lang.IllegalStateException
at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:443)
at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:914)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:574)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Please anybody help me as i don't know how to fix this issue and probably i may be doing some silly mistake but i can't figure it out. Please help me . i will be very thankful to you!
You can't write in the client File System like that; in your case, your server is in your machine, but don't get fooled, it's a server path, not a client one. You need to write on the response.
You can't use both Struts2 result and writing in the OutputStream together: when manually forging the response, you must bypass the framework convention, and return the result by yourself. The correct result for this case is is Action.NONE:
<action name="Download" class="com.cdac.action.DownloadAction" />
public String execute(){
/*
do your stuff
*/
return NONE;
}
You're lucky, here is a kick off example I've written long time ago, explaining the whole thing (including the need to deal with duplicate filenames in the same ZIP).
Also try using Content-Length properly (to let the browser draw a realistic progress-bar).
I am getting java.lang.IllegalStateException: getOutputStream() has already been called for this response ..even though am not calling response.getOutputStream in try or catch blocks and am also not using getWriter in my servlet code...
here is my code..
public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException
{
ServletOutputStream output =response.getOutputStream();
Connection connection=null;
InputStream input=new FileInputStream(new File("C:/Properties_wardwise.jasper"));
Map<String, Object> parameterMap=new HashMap<String, Object>();
parameterMap.put("Ward_id",request.getParameter("ward"));
parameterMap.put("ulb_id", request.getParameter("prop"));
parameterMap.put("Prop_id", request.getParameter("ulbs"));
try {
System.out.println("enter in the report");
Class.forName("com.mysql.jdbc.Driver");
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/udis", "root", "root");
JasperRunManager.runReportToPdfStream(input, output, parameterMap,connection);
response.setContentType("application/pdf");
} catch (Exception e) {
e.printStackTrace();
}finally{
input.close();
try {
connection.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
Exception Stack trace is...............
Sep 21, 2013 3:24:50 PM com.sun.faces.application.view.FaceletViewHandlingStrategy handleRenderException
SEVERE: Error Rendering View[/pages/ParameterReportMaster1.xhtml]
java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:638)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:214)
at com.sun.faces.context.ExternalContextImpl.getResponseOutputWriter(ExternalContextImpl.java:723)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.createResponseWriter(FaceletViewHandlingStrategy.java:938)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:377)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Sep 21, 2013 3:24:50 PM com.sun.faces.context.ExceptionHandlerImpl throwIt
INFO: Exception when handling error trying to reset the response.
java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:638)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:214)
at com.sun.faces.context.ExternalContextImpl.getResponseOutputWriter(ExternalContextImpl.java:723)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.createResponseWriter(FaceletViewHandlingStrategy.java:938)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:377)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Sep 21, 2013 3:24:50 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [Faces Servlet] in context with path [/SpringJSF3] threw exception [getOutputStream() has already been called for this response] with root cause
java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:638)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:214)
at com.sun.faces.context.ExternalContextImpl.getResponseOutputWriter(ExternalContextImpl.java:723)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.createResponseWriter(FaceletViewHandlingStrategy.java:938)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:377)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
the setContentType("application/pdf") method must be called before getOutputStream() or getWritter(), change the medthod-calling order and then try it to see whether it works
i've written this code for adding photos to database and i'm not much into web application
so please help me out
// obtains input stream of the upload file
inputStream = filePart.getInputStream();
}
Connection conn = null; // connection to the database
String message = null; // message will be sent back to client
try {
// connects to the database
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/opmdb", "root", "sourabh");
// constructs SQL statement
String sql = "INSERT INTO photos (userId, photo) values (?, ?)";
PreparedStatement statement = conn.prepareStatement(sql);
statement.setString(1, userName);
statement.setBinaryStream(2, inputStream);
here it is telling the error i've also used setBlob but the error remains the same
Exceptions and stacktrace is
java.lang.AbstractMethodError:com.mysql.jdbc.PreparedStatement.setBinaryStream(ILjava/io/InputStream;)V
at org.onlinepicturemanager.addphotoservlet.AddPhotoServlet.doPost(AddPhotoServlet.java:81)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:947)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
change your code statement.setBinaryStream(2, inputStream);
to
statement.setBinaryStream(2, inputStream,file.length);
'setBinaryStream' method need 3 parameteres,add your file length in this method