refcursorexample.java

来自「比较实用的C++编程思想 有很多例子可以用」· Java 代码 · 共 71 行

/*
 * This sample shows how to call a PL/SQL function that opens
 * a cursor and get the cursor back as a Java ResultSet.
 */

import java.sql.*;
import java.io.*;

// Importing the Oracle Jdbc driver package makes the code more readable
import oracle.jdbc.driver.*;

class RefCursorExample
{
  public static void main (String args [])
       throws SQLException
  {
    // Load the driver
    DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

    // Connect to the database
    // You can put a database name after the @ sign in the connection URL.
    Connection conn =
      DriverManager.getConnection ("jdbc:oracle:oci8:@", "scott", "tiger");

    // Create the stored procedure
    init (conn);

    // Prepare a PL/SQL call
    CallableStatement call =
      conn.prepareCall ("{ ? = call java_refcursor.job_listing (?)}");

    // Find out all the SALES person
    call.registerOutParameter (1, OracleTypes.CURSOR);
    call.setString (2, "SALESMAN");
    call.execute ();
    ResultSet rset = (ResultSet)call.getObject (1);

    // Dump the cursor
    while (rset.next ())
      System.out.println (rset.getString ("ENAME"));

    // Close all the resources
    rset.close();
    call.close();
    conn.close();

  }

  // Utility function to create the stored procedure
  static void init (Connection conn)
       throws SQLException
  {
    Statement stmt = conn.createStatement ();

    stmt.execute ("create or replace package java_refcursor as " +
		  "  type myrctype is ref cursor return EMP%ROWTYPE; " +
		  "  function job_listing (j varchar2) return myrctype; " +
		  "end java_refcursor;");

    stmt.execute ("create or replace package body java_refcursor as " +
		  "  function job_listing (j varchar2) return myrctype is " +
		  "    rc myrctype; " +
		  "  begin " +
		  "    open rc for select * from emp where job = j; " +
		  "    return rc; " +
		  "  end; " +
		  "end java_refcursor;");
    stmt.close();
  }
}