I have been working with JDBC. Below is the code I use to obtain connection.
JDBC code:
Connection con = null;
Statement st = null;
final String DB_URL = "jdbc:jtds:sqlserver://00.00.00.00:0000/DB";
// Database credentials
final String USER = "usrname";
final String PASS = "pw";
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
con = DriverManager.getConnection(DB_URL, USER, PASS);
st = con.createStatement();
System.out.println("successfully connected!");
} catch (Exception err) {
System.out.println(" " + err.getMessage ());
}
finally {
try {
con.close();
} catch (Exception e) { /* ignored */ }
try {
st.close();
} catch (Exception e) {
/* ignored */
}
}
}
}
I have generated a Webservice off of a WSDL which contains getters and setters. While it is in the same package of the Webservice (its own class) I can simply run the class and it will generate "Successfully connected". (keep in mind that the build is the same since its in the same package) Now when I insert the code into a method on the Webservice and call it using insert();. From here I invoke the Webservice with the generated client. When looking back at the console I obtain the "com.microsoft.sqlserver.jdbc.SQLServerDriver" error. Which is generally given when paths are not built correct.
It works outside of the getter and setter class, but why not inside?
I have tried to sync a full documentation. It will cover
Various ways of database connection
Sample code for testing connection
Common errors and how we can solve those issues
Define JRE support
How to set the CLASSPATH variable?
How to register the Driver?
How to pass the Connection URL?
Choosing the Right JAR file
Making a Simple Connection to a Database
After installing the Microsoft SQL Server 2000 driver for JDBC, database connection may be done by two ways:
1) with a connection URL, or
2) with a JNDI data source
Sample Code to Test the Connection
The following sample code tries to connect to the database and displays the database name, the version, and the available catalogs. Replace the server properties with the values for your server:
import java.*;
public class Connect{
private java.sql.Connection con = null;
private final String url = "jdbc:microsoft:sqlserver://";
private final String serverName= "localhost";
private final String portNumber = "1433";
private final String databaseName= "pubs";
private final String userName = "user";
private final String password = "password";
// Informs the driver to use server a side-cursor,
// which permits more than one active statement
// on a connection.
private final String selectMethod = "cursor";
// Constructor
public Connect(){}
private String getConnectionUrl(){
return url+serverName+":"+portNumber+";databaseName="+databaseName+";selectMethod="+selectMethod+";";
}
private java.sql.Connection getConnection(){
try{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
con = java.sql.DriverManager.getConnection(getConnectionUrl(),userName,password);
if(con!=null) System.out.println("Connection Successful!");
}catch(Exception e){
e.printStackTrace();
System.out.println("Error Trace in getConnection() : " + e.getMessage());
}
return con;
}
/*
Display the driver properties, database details
*/
public void displayDbProperties(){
java.sql.DatabaseMetaData dm = null;
java.sql.ResultSet rs = null;
try{
con= this.getConnection();
if(con!=null){
dm = con.getMetaData();
System.out.println("Driver Information");
System.out.println("\tDriver Name: "+ dm.getDriverName());
System.out.println("\tDriver Version: "+ dm.getDriverVersion ());
System.out.println("\nDatabase Information ");
System.out.println("\tDatabase Name: "+ dm.getDatabaseProductName());
System.out.println("\tDatabase Version: "+ dm.getDatabaseProductVersion());
System.out.println("Avalilable Catalogs ");
rs = dm.getCatalogs();
while(rs.next()){
System.out.println("\tcatalog: "+ rs.getString(1));
}
rs.close();
rs = null;
closeConnection();
}else System.out.println("Error: No active Connection");
}catch(Exception e){
e.printStackTrace();
}
dm=null;
}
private void closeConnection(){
try{
if(con!=null)
con.close();
con=null;
}catch(Exception e){
e.printStackTrace();
}
}
public static void main(String[] args) throws Exception
{
Connect myDbTest = new Connect();
myDbTest.displayDbProperties();
}
}
If this code is successful, the output is similar to the following:
Connection Successful! Driver Information
Driver Name: SQLServer
Driver Version: 2.2.0022
Database Information
Database Name: Microsoft SQL Server
Database Version: Microsoft SQL Server 2000 - 8.00.384 (Intel X86)
May 23 2001 00:02:52
Copyright (c) 1988-2000 Microsoft Corporation
Desktop Engine on Windows NT 5.1 (Build 2600: )
Avalilable Catalogs
catalog: master
catalog: msdb
catalog: pubs
catalog: tempdb
Basic Connectivity Troubleshooting
Error-1
java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]Login failed for user 'user'. Reason: Not associated with a trusted SQL Server connection.
Ans:
This error message occurs if the SQL Server 2000 authentication mode
is set to Windows Authentication mode. The Microsoft SQL Server 2000
driver for JDBC does not support connecting by using Windows NT
authentication. You must set the authentication mode of your SQL
Server to Mixed mode, which permits both Windows Authentication and
SQL Server Authentication.
Error-2
java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]This version of the JDBC driver only supports Microsoft SQL Server 2000. You can either upgrade to SQL Server 2000 or possibly locate another version of the driver.
Ans:
This error message occurs you try to connect to a SQL Server version
earlier than SQL Server 2000. The Microsoft SQL Server 2000 driver for
JDBC supports connectivity only with SQL Server 2000.
Java Runtime Environment Requirements
Starting with the Microsoft JDBC Driver 4.2 for SQL Server, Sun Java
SE Development Kit (JDK) 8.0 and Java Runtime Environment (JRE) 8.0
are supported. Support for Java Database Connectivity (JDBC) Spec
API has been extended to include the JDBC 4.1 and 4.2 API.
Starting with the Microsoft JDBC Driver 4.1 for SQL Server, Sun Java
SE Development Kit (JDK) 7.0 and Java Runtime Environment (JRE) 7.0
are supported.
Starting with the Microsoft JDBC Driver 4.0 for SQL Server, the JDBC
driver support for Java Database Connectivity (JDBC) Spec API has
been extended to include the JDBC 4.0 API. The JDBC 4.0 API was
introduced as part of the Sun Java SE Development Kit (JDK) 6.0 and
Java Runtime Environment (JRE) 6.0. JDBC 4.0 is a superset of the
JDBC 3.0 API.
For more: System Requirements for the JDBC Driver
To Set the CLASSPATH Variable
The Microsoft SQL Server 2000 driver for JDBC .jar files must be listed in your CLASSPATH variable. The CLASSPATH variable is the search string that Java Virtual Machine (JVM) uses to locate the JDBC drivers on your computer. If the drivers are not listed in your CLASSPATH variable, you receive the following error message when you try to load the driver:
java.lang.ClassNotFoundException: com/microsoft/jdbc/sqlserver/SQLServerDriver
Set your system CLASSPATH variable to include the following entries:
\Your installation path\Lib\Msbase.jar
\Your installation path\Lib\Msutil.jar
\Your installationpath\Lib\Mssqlserver.jar
This is an example of a configured CLASSPATH variable:
CLASSPATH=.;c:\program files\Microsoft SQL Server 2000 Driver for
JDBC\lib\msbase.jar;c:\program files\Microsoft SQL Server 2000 Driver
for JDBC\lib\msutil.jar;c:\program files\Microsoft SQL Server 2000
Driver for JDBC\lib\mssqlserver.jar
To Register the Driver
Registering the driver instructs JDBC Driver Manager which driver to load. When you load a driver by using the class.forName function, you must specify the name of the driver. This is the driver name for Microsoft SQL Server 2000 Driver for JDBC:
com.microsoft.jdbc.sqlserver.SQLServerDriver
The following sample code demonstrates how to register the driver:
Driver d = (Driver)Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
To Pass the Connection URL
You must pass your database connection information in the form of a connection URL. This is a template URL for Microsoft SQL Server 2000 Driver for JDBC. Substitute the values for your database:
jdbc:microsoft:sqlserver://servername:1433
The following sample code demonstrates how to specify a connection URL:
con = DriverManager.getConnection("jdbc:microsoft:sqlserver://localhost:1433", "userName", "password");
Choosing the Right JAR file
The Microsoft JDBC Drivers 6.0 and 4.2 for SQL Server provide
sqljdbc.jar, sqljdbc4.jar, sqljdbc41, and sqljdbc42.jar class
library files to be used depending on your preferred Java Runtime
Environment (JRE) settings.
The Microsoft JDBC Driver 4.1 for SQL Server provides sqljdbc.jar,
sqljdbc4.jar, and sqljdbc41.jar class library files to be used
depending on your preferred Java Runtime Environment (JRE) settings.
The Microsoft JDBC Driver for SQL Server 4.0 provides sqljdbc.jar
and sqljdbc4.jar class library files to be used depending on your
preferred Java Runtime Environment (JRE) settings.
Making a Simple Connection to a Database
Using the sqljdbc.jar class library, applications must first register the driver as follows:
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
When the driver is loaded, you can establish a connection by using a connection URL and the getConnection method of the DriverManager class:
String connectionUrl = "jdbc:sqlserver://localhost:1433;" +
"databaseName=AdventureWorks;user=MyUserName;password=*****;";
Connection con = DriverManager.getConnection(connectionUrl);
In the JDBC API 4.0, the DriverManager.getConnection method is enhanced to load JDBC drivers automatically. Therefore, applications do not need to call the Class.forName method to register or load the driver when using the sqljdbc4.jar, sqljdbc41.jar, or sqljdbc42.jar class library.
When the getConnection method of the DriverManager class is called, an appropriate driver is located from the set of registered JDBC drivers. sqljdbc4.jar, sqljdbc41.jar, or sqljdbc42.jar file includes "META-INF/services/java.sql.Driver" file, which contains the com.microsoft.sqlserver.jdbc.SQLServerDriver as a registered driver. The existing applications, which currently load the drivers by using the Class.forName method, will continue to work without modification.
Resource Link:
All data's are taken from following-
Using the JDBC Driver
HOW TO: Get Started with Microsoft JDBC
ClassNotFoundException - com.microsoft.jdbc.sqlserver.SQLServerDriver
The CLASSPATH variable is the search string that Java Virtual Machine (JVM) uses to locate the JDBC drivers on your computer. If the drivers are not listed in your CLASSPATH variable, you receive the following error message when you try to load the driver:
java.lang.ClassNotFoundException: com/microsoft/jdbc/sqlserver/SQLServerDriver
Check your class path and let me know if that was the issue.
You dont need both jTDS and JDBC in your classpath. Any one is required. You'll most likley need only sqljdbc.jar. Be sure to place it in a psychical location like lib within WEB-INF directory of your project instead of adding it into your classpath via IDE. Reset your service, and trying again. It should fix it self.
Jar file can be found here:
www.java2s.com/Code/JarDownload/sqlserverjdbc/sqlserverjdbc.jar.zip
Related
Hi I am getting below exception when i try to connect DB2 server thru java
com.ibm.db2.jcc.b.ao: [jcc][t4][2010][11246][3.53.70] Connection authorization failure occurred. Reason: Local security service non-retryable error. ERRORCODE=-4214, SQLSTATE=28000
When I tried connecting the DB2 using SQL Developer (With jars added in Third Party tool) the connection was successful.
I included all the required db2jcc,db2jcc4 and db2jcc_license jar files in the project. But it throws exception.
try{
Class.forName("com.ibm.db2.jcc.DB2Driver");
String url = "jdbc:db2://myhost:portNumber/dbname";
Connection con = DriverManager.getConnection(url, "uname","password");
}catch(Exception e){
e.printStackTrace();
}
3.53.70 driver version corresponds to quite an old 9.5.3 db2 version.
You should try to download a jdbc driver corresponding to your db2 version.
DB2 JDBC Driver Versions and Downloads
I am using eclipse for JAVA development in Windows 7 and I put my project in D:\workspace.
The following code is trying to connect to a SQLite database, While the jdbc address is jdbc:sqlite:sample.db, where is the location that JAVA is looking for sample.db ?
public class Sample{
public static void main(String[] args) throws ClassNotFoundException{
Class.forName("org.sqlite.JDBC");
Connection connection = null;
try{
connection = DriverManager.getConnection("jdbc:sqlite:sample.db");
System.out.println("I got connection.");
}catch(SQLException e){
System.out.println(e.getMessage());
}
}
}
I have see there is example for using absolute paths, But I'd like to know where to put the DB file while I use Relative path.
Also, Does the file location be difference if I put the Class in some package ?
By default the db file will be created in root of project directory.
Other path formats you can use along with sql lite are:
jdbc:sqlite://dirA/dirB/dbfile
jdbc:sqlite:/DRIVE:/dirA/dirB/dbfile
jdbc:sqlite:///COMPUTERNAME/shareA/dirB/dbfile
SQLite supports on-memory database management, which does not create any database files. To use a memory database in your Java code, get the database connection as follows:
Connection connection = DriverManager.getConnection("jdbc:sqlite::memory:");
If you want physical SQLite database you need to create SQLite database using SQLite manager or Mozilla or chrome add-on plugin.And give path like that
Windows
Connection connection = DriverManager.getConnection("jdbc:sqlite:C:/work/mydatabase.db");
Linux, Mac OS X
Connection connection = DriverManager.getConnection("jdbc:sqlite:/home/leo/work/mydatabase.db");
Hi I have the below code to connect to MS Access database on Windows 7 OS. I have changed the Data Source short cut to point to 64bit odbc then 32 bit. But still getting the error as
java.sql.SQLException: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6956)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7113)
at sun.jdbc.odbc.JdbcOdbc.SQLDriverConnect(JdbcOdbc.java:3072)
at sun.jdbc.odbc.JdbcOdbcConnection.initialize(JdbcOdbcConnection.java:323)
at sun.jdbc.odbc.JdbcOdbcDriver.connect(JdbcOdbcDriver.java:174)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:221)
at TestDBConnection.main(TestDBConnection.java:21)
And my code is :
import java.sql.Connection;
import java.sql.DriverManager;
public class TestDBConnection {
public static void main(String[] args) {
// TODO Auto-generated method stub
try
{
System.out.println("filename");
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String database =
"jdbc:odbc:DRIVER={Microsoft Access Driver (*.mdb)};DBQ=C:\\Test\\Tests.mdb";
Connection conn = DriverManager.getConnection(database, "", "");
} catch(Exception ex) {
ex.printStackTrace();
}
}
}
How ever I have SQL Workbench tool through which I can connect to it but not through java code.
Please need help badly as I am struggling with this from past 3 hours searching on Google.
If your Java app is running in a 64-bit Java Virtual Machine (JVM) then DRIVER={Microsoft Access Driver (*.mdb)} is not going to work because there is no 64-bit version of the Jet database engine. You can...
Download and install the 64-bit version of the Microsoft Access Database Engine from here, and then use DRIVER={Microsoft Access Driver (*.mdb, *.accdb)} in your code.
... or ...
Run your Java app in a 32-bit JVM and continue to use the existing DRIVER= string. The related answer here might prove helpful if you choose this option.
... or ...
Use the UCanAccess JDBC driver for Access databases. It is a free, open-source, pure Java implementation so it works on both 32-bit and 64-bit systems, both Windows and non-Windows. It also works with Java 8 (which has dropped the JDBC-ODBC Bridge). For more details, see:
Manipulating an Access database from Java without ODBC
You can install the 64 ODBC drivers for Access available from Microsoft
http://www.microsoft.com/en-us/download/details.aspx?id=13255
1) you will have to configure System dsn (Driver Microsoft Access Driver(.mdb,.accdb))
2) link .mdb database in above configuration
and write below code.
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String database = "jdbc:odbc:systemdsnname";
Connection conn = DriverManager.getConnection(database, "", "");
I recently made an account using Amazon Web Services - hoping to get access to a 24/7 database in postgresql. However, there is little documentation as to how to connect to a postgresql database instance using straight java code. So my question is, how would I connect to my made database?? Please be specific. some .getConnection code would be helpful. AND AGAIN. I WANT TO USE JAVA CODE. No extensions or toolkits.
heres some connection code:
try {
Properties props = new Properties();
//Uncomment the following line if using a keystore.
props.setProperty("ssl", "true");
props.setProperty("user", "BruceWayne");
props.setProperty("password", "password");
connection = DriverManager.getConnection("jdbc:postgresql://batcomputer.cu2oezud659w.us-west-2.rds.amazonaws.com:5432",props);
} catch (SQLException e) {
System.out.println("Connection Failed! Check output console");
e.printStackTrace();
return;
}
my guess is that the problem is at the line where "connection" is.
and here is the error at the terminal:
1291-121-25:SQLGUI student$ javac -cp postgresql2.jar:. JDBCExample.java
1291-121-25:SQLGUI student$ java -cp postgresql2.jar:. JDBCExample
-------- PostgreSQL JDBC Connection Testing ------------
PostgreSQL JDBC Driver Registered!
Connection Failed! Check output console
java.sql.SQLException: No suitable driver found for jdbc:postgresql://batcomputer.cu2oezud659w.us-west-2.rds.amazonaws.com:5432
at java.sql.DriverManager.getConnection(DriverManager.java:596)
at java.sql.DriverManager.getConnection(DriverManager.java:187)
at JDBCExample.main(JDBCExample.java:38)
any help is highly appreciated!!!
You cannot easily connect to PostgreSQL (or any other database) without "extensions or toolkits". Specifically, the only sane way to do it is to use JDBC. The JDBC interfaces themselves are part of Java, but connecting to individual databases requires database-specific drivers.
For PostgreSQL, that's PgJDBC.
So you really need to:
Read the JDBC tutorial; and
Read the PgJDBC documentation
The JDBC tutorial explains how to use JDBC. The PgJDBC documentation explains the details of the PostgreSQL specific bits, like the JDBC URL you should use to connect to PostgreSQL. It contains example code too.
After you've ensured that PgJDBC is on your classpath, connecting (without doing anything with the connection) is as simple as:
public void donothing() throws SQLException, ClassNotFoundException
{
Class.forName("org.postgresql.Driver");
String url = "jdbc:postgresql://localhost/test?user=fred&password=secret&ssl=true";
Connection conn = DriverManager.getConnection(url);
// Do stuff here
conn.close();
}
I would like to access to a Oracle database (SQL Developer) from a Java program. I never used JDBC before.
Here is what i wrote:
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url = "jdbc:odbc:host_name:port:database_name";
Connection con = DriverManager.getConnection(url, login, passwd);
I got an error:
[Microsoft][ODBC Driver Manager]
Data source name not found and no default driver specified
Host name, port, DB name and logins are good.
Is this driver OK to communicate with SQL Developer ?
I don't know what to do,
thanks for helping !
Try this
Class.forName ("oracle.jdbc.driver.OracleDriver");
for Oracle you can use ojdbc
Class.forName("oracle.jdbc.driver.OracleDriver");
for SQL Server u can use jtds
Class.forName("net.sourceforge.jtds.jdbc.Driver");
The JDBC driver sun.jdbc.odbc.JdbcOdbcDriver is bridge driver that wraps an ODBC driver as described here.
SQL Developer is an Oracle tool that acts as an IDE against the Oracle database.
To connect Java to an Oracle database you should obtain the Oracle JDBC driver and ensure the jar is on your classpath (as described in the documentation for java.sql.DriverManager, forcing the class to be loaded is no longer necessary).
The important bit is the connection string, which in its simplest form for Oracle should follow the structure:
jdbc:oracle:thin:#//host:port/service
Where:
host: the hostname of the machine running Oracle
port: the port that Oracle is listening for connections on
service: the database instance to connect to
The full docs are here.