《J2EE应用开发（WebLogic+JBuilder）》代码

				package jdbcexample;				import java.sql.*;				import javax.naming.*;				import javax.sql.*;				import java.util.Properties;				import javax.rmi.PortableRemoteObject;								public class Example2 {				  public static void main(String[] args) {				    DataSource ds = null;				   Context ctx = null;				   Connection myConn = null;				   try {				     ctx = getInitialContext();				     ds = (javax.sql.DataSource)				         ctx.lookup("myDataSource");				   }				   catch (Exception E) {				     System.out.println("Init Error: " + E);				   }				   Statement myStatement=null;				   ResultSet myResultSet=null;				   try {				     myConn = ds.getConnection();				     myStatement = myConn.createStatement();				     myResultSet = myStatement.executeQuery(				         "SELECT * from employee" );								    for(int j=1;j				    {				       System.out.print(myResultSet.getMetaData().getColumnName(j)+"\t");				    }				    System.out.println();				    while(myResultSet.next())				    {				       for(int j=1;j				      {				        System.out.print(myResultSet.getObject(j)+"\t");				       }				       System.out.println();				     }				     myResultSet.close();				   }				   catch (SQLException e) {				     System.out.println("Error code = " + e.getErrorCode());				     System.out.println("Error message = " + e.getMessage());				   }				   finally {				     try {				       if (myStatement != null) {				         myStatement.close();				       }				       if (myConn != null) {				         myConn.close();				       }				     }				     catch (SQLException e) {				       System.out.println("Error code = " + e.getErrorCode());				       System.out.println("Error message = " + e.getMessage());				     }				   }																    }				    private static Context getInitialContext() throws Exception {				           String url = "t3://localhost:7001";				           String user = "system";				           String password = "security";				           Properties properties = null;				           try {				             properties = new Properties();				             properties.put(Context.INITIAL_CONTEXT_FACTORY,				                 "weblogic.jndi.WLInitialContextFactory");				             properties.put(Context.PROVIDER_URL, url);				             if (user != null) {				               properties.put(Context.SECURITY_PRINCIPAL, user);				               properties.put(Context.SECURITY_CREDENTIALS, password == null ? "" : password);				             }				             return new InitialContext(properties);				           }				           catch(Exception e) {				             throw e;				           }				         }								}