Develop Reference

Accessing Oracle DB express from within Java

I have a basic Java application (with a GUI) that uses a linked list to add/remove/modify Customer objects and I want to store them in a database (Oracle DB express to be exact)?
As I understand it, I have to create a table with some tool, and the use that tool to auto-generate a Java class that would allow me to communicate with the DB. How far off am I with this?

Just to make your question clear, What tool have you used to generate your java code?
I recommend you to avoid using code generation tool in case you want to learn in and out of Java.Here is an example of how you can connect your SWING application with Oracle DB,MySQL,Derby and many more other databases.
Connection con;
Statement smt;
ResultSet rs;
String user="databaseuser";
String pass="password";
String path="jdbc:oracle:thin:#localhost:1521:Sampledb"; //put db url here
try{
con=DriverManager.getConnection(path, user, pass);
smt=con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE);
String SQL="SELECT *FROM Registered_users_tb "; //Your Query here
rs=smt.executeQuery(SQL);
rs.moveToInsertRow();
//First param is db column name,second param is variable name
rs.updateString("USERNAME", username);
rs.updateString("FNAME", fname);
rs.updateString("MNAME", mname);
rs.updateString("LNAME", lname);
rs.updateString("GENDER", gender);
rs.updateString("DEPARTMENT", dept);
rs.insertRow();
rs.close();
smt.close();
}
catch(SQLException err){
JOptionPane.showMessageDialog(Classname.this,err.getMessage());
}

For creating a complete new database, oracle provide a gui tool called DBCA. I found a couple of links to use this tool: Link 1 and Link 2
This tutorial teaches how to access an Oracle database. For accessing such an database you need additional drivers found here. Here an short example how to access such a database:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;
class DatabaseAccess
{
public static void main(String [] args)
{
Connection connection = null;
try
{
Class.forName("oracle.jdbc.OracleDriver");
String dbPath = "jdbc:oracle:thin:#localhost:1521:myDatabase";
String username = "user";
String password = "password";
connection = DriverManager.getConnection(dbPath, username, password);
if(connection != null)
{
System.out.println("Connected with database");
Statement statement = connection.createStatement();
ResultSet results = statementt.executeQuery("SELECT * FROM myTable");
while(result.next())
{
System.out.println(result.getString("myString"));
}
}
catch(ClassNotFoundException | SQLException exc)
{
exc.printStackTrace();
}
finally
{
try
{
connection.close();
}
catch(SqlException exc)
{
exc.printStackTrace();
}
}
}
}
For an more advanced example visit the given link.

How to use data from a Webservice on Eclipse to populate a database in MySQL

I want to be able to use my web service to be able to populate a database in MySQL. From the code below, I have connected to the database that I want to populate. How can I use the data that users import on my Web Service to populate MySQL database exchangeInformation. The Web service is working and everything works. I am just looking to be able to use the input of that data from the web service to populate my database in MySQL.
Any help would be greatly appreciated.
Thanks
Code Below:
package org.example.www.newwsdlfile3;
import java.sql.Connection;
import java.sql.DriverManager;
public class JavaMYSQL {
public static void main(String[] args) throws Exception {
getConnection();
}
public static Connection getConnection() throws Exception{
try{
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/exchangeinformation";
String username = "root";
String password = "admin";
Class.forName(driver);
Connection conn = DriverManager.getConnection(url,username,password);
System.out.println("Connected");
return conn;
} catch (Exception e) {System.out.println(e);}
return null;
}
}

Use this page to see an example of creating a statement from a connection object and executing a query with it. As to your webservice information, I do not see where you are passing it in. That said you can use some simple string replacement to handle that:
String sql = "INSERT INTO tableName values(':value1', ':value2',':value3', etc)";
sql = sql.replace(":value1", dataFromService);
Something along those lines should get you started.
EDIT FOR CLARITY:
String sql = "INSERT INTO tableName values(':value1', ':value2',':value3', etc)";
String dataFromService = "EDIT";
sql = sql.replace(":value1", dataFromService);
System.out.println(sql);
Would net you an output:
INSERT INTO tableName values('EDIT',':value2','value3', etc)

JDBC connectivity issue

My code for connection with access database is this...its working fine here... i have tried to connect my database with java derby embedded database but always getting sql exception assuming the same table what changes do i need to connect my application with java derby embedded database??
package database;
import java.sql.*;
import javax.swing.JOptionPane;
public class database {
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
try
{
String url = "jdbc:odbc:personnew";
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection(url);
Statement st=con.createStatement();
String sql="SELECT * FROM Person";
ResultSet rs=st.executeQuery(sql);
while(rs.next()){
String id=rs.getString("id");
String name=rs.getString("name");
String fathername=rs.getString("fathername");
JOptionPane.showMessageDialog(null,id+"\t"+name+"\t"+fathername);
}
// TODO code application logic here
}catch(Exception sqlEx){
System.out.println("Sql exception");
}
}
}

For one thing, You would need to use the correct JDBC driver; org.apache.derby.jdbc.EmbeddedDriver
http://db.apache.org/derby/papers/DerbyTut/embedded_intro.html
The tutorial in general is probably where you want to start as it tells you everything you need to know:
http://db.apache.org/derby/papers/DerbyTut/index.html

Oracle java connection

I have written a connection code with oracle. But still I am getting errors. I'll type the code of mine here.
import java.sql.*;
public class SimpleOraJava {
public static void main(String[] args) throws SQLException, ClassNotFoundException {
// TODO Auto-generated method stub
DriverManager.registerDriver(new Oracle.jdbc.driver.OracleDriver());
String serverName="10.20.228.67";
String user="root";
String password="root";
String SID="abc";
String URL="jdbc:oracle:thin:#"+serverName+":"+1520+":"+SID;
Connection conn=DriverManager.getConnection(URL, user, password);
String SQL="Select employeename from employee";
Statement stat=conn.createStatement();
ResultSet rs=stat.executeQuery(SQL);
while (rs.next()){
System.out.println(rs.getInt(1));
}
stat.close();
conn.close();
}
}
It shows error in this line:
DriverManager.registerDriver(new Oracle.jdbc.driver.OracleDriver());
The error is on the word Oracle. It is asking me to create class in package oracle.jdbc.driver
Please somebody help!

Okay, assuming that class-paths are set up, and the appropriate .jar files are in the correct directories, the first thing that jumps out is I believe you need to import the package into your class. There should be a import oracle.jdbc.driver.*; line under the import java.sql.*; line also the DriverManager call should be
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
with the lowercase o, it's capitalized in your code.
Another thing might be, the version of the Oracle JDBC, and Oracle client you're using. According to this OTN Discussion post Oracle JDBC 10.2 is the last release to support the package oracle.jdbc.driver.
So basically according to the metalink page if you're using a JDBC 10.2 or older client, something like this will work:
import java.sql.*;
import oracle.jdbc.driver.*;
public class myjdbcapp
{
public static void main(String[] args) throws SQLException
{
DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
String url = "jdbc:oracle:thin:#server:port:orcl";
String userName = "scott";
String password = "tiger";
Connection conn = DriverManager.getConnection (url, userName, password);
OracleCallableStatement myprocst = (OracleCallableStatement)
conn.prepareCall ("begin myproc(?); end;");
// ...
}
}
Clients newer than JDBC 10.2 will need to change import oracle.jdbc.driver.; to import oracle.jdbc.;

DriverManager.registerDriver(new Oracle.jdbc.driver.OracleDriver());
The package is oracle.jdbc.driver with a lowercase o.

How do I connect to a SQL Server 2008 database using JDBC?

I have MSSQL 2008 installed on my local PC, and my Java application needs to connect to a MSSQL database. I am a new to MSSQL and I would like get some help on creating user login for my Java application and getting connection via JDBC. So far I tried to create a user login for my app and used following connection string, but I doesn't work at all. Any help and hint will be appreciated.
jdbc:jtds:sqlserver://127.0.0.1:1433/dotcms
username="shuxer" password="itarator"

There are mainly two ways to use JDBC - using Windows authentication and SQL authentication. SQL authentication is probably the easiest. What you can do is something like:
String userName = "username";
String password = "password";
String url = "jdbc:sqlserver://MYPC\\SQLEXPRESS;databaseName=MYDB";
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn = DriverManager.getConnection(url, userName, password);
after adding sqljdbc4.jar to the build path.
For Window authentication you can do something like:
String url = "jdbc:sqlserver://MYPC\\SQLEXPRESS;databaseName=MYDB;integratedSecurity=true";
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn = DriverManager.getConnection(url);
and then add the path to sqljdbc_auth.dll as a VM argument (still need sqljdbc4.jar in the build path).
Please take a look here for a short step-by-step guide showing how to connect to SQL Server from Java using jTDS and JDBC should you need more details. Hope it helps!

You can use this :
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class ConnectMSSQLServer
{
public void dbConnect(String db_connect_string,
String db_userid,
String db_password)
{
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn = DriverManager.getConnection(db_connect_string,
db_userid, db_password);
System.out.println("connected");
Statement statement = conn.createStatement();
String queryString = "select * from sysobjects where type='u'";
ResultSet rs = statement.executeQuery(queryString);
while (rs.next()) {
System.out.println(rs.getString(1));
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args)
{
ConnectMSSQLServer connServer = new ConnectMSSQLServer();
connServer.dbConnect("jdbc:sqlserver://<hostname>", "<user>",
"<password>");
}
}

I am also using mssql server 2008 and jtds.In my case I am using the following connect string and it works.
Class.forName( "net.sourceforge.jtds.jdbc.Driver" );
Connection con = DriverManager.getConnection( "jdbc:jtds:sqlserver://<your server ip
address>:1433/zacmpf", userName, password );
Statement stmt = con.createStatement();

If your having trouble connecting, most likely the problem is that you haven't yet enabled the TCP/IP listener on port 1433. A quick "netstat -an" command will tell you if its listening. By default, SQL server doesn't enable this after installation.
Also, you need to set a password on the "sa" account and also ENABLE the "sa" account (if you plan to use that account to connect with).
Obviously, this also means you need to enable "mixed mode authentication" on your MSSQL node.

Try to use like this: jdbc:jtds:sqlserver://127.0.0.1/dotcms; instance=instanceName
I don't know which version of mssql you are using, if it is express edition, default instance is sqlexpress
Do not forget check if SQL Server Browser service is running.

You can try configure SQL server:
Step 1: Open SQL server 20xx Configuration Manager
Step 2: Click Protocols for SQL.. in SQL server configuration. Then, right click TCP/IP, choose Properties
Step 3: Click tab IP Address, Edit All TCP. Port is 1433
NOTE: ALL TCP port is 1433
Finally, restart the server.

Simple Java Program which connects to the SQL Server.
NOTE: You need to add sqljdbc.jar into the build path
// localhost : local computer acts as a server
// 1433 : SQL default port number
// username : sa
// password: use password, which is used at the time of installing SQL server management studio, In my case, it is 'root'
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class Conn {
public static void main(String[] args) throws InstantiationException, IllegalAccessException, ClassNotFoundException {
Connection conn=null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=company", "sa", "root");
if(conn!=null)
System.out.println("Database Successfully connected");
} catch (SQLException e) {
e.printStackTrace();
}
}
}

Try this.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class SQLUtil {
public void dbConnect(String db_connect_string,String db_userid,
String db_password) {
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn = DriverManager.getConnection(db_connect_string,
db_userid, db_password);
System.out.println("connected");
Statement statement = conn.createStatement();
String queryString = "select * from cpl";
ResultSet rs = statement.executeQuery(queryString);
while (rs.next()) {
System.out.println(rs.getString(1));
}
} catch (Exception e) {
e.printStackTrace();
} }
public static void main(String[] args) {
SQLUtil connServer = new SQLUtil();
connServer.dbConnect("jdbc:sqlserver://192.168.10.97:1433;databaseName=myDB",
"sa",
"0123");
}
}

Try this
Class.forName( "net.sourceforge.jtds.jdbc.Driver" );
String url ="Jdbc:jtds:sqlsever://ip/instanceName;instance=instanceName;databseName=dbName;user=yourUser;password=yourpass;";