posts - 0, comments - 77, trackbacks - 0, articles - 356
  BlogJava :: 首页 :: 新随笔 :: 联系 :: 聚合  :: 管理

用java调用oracle存储过程总结

Posted on 2007-09-07 15:48 semovy 阅读(242) 评论(0)  编辑  收藏 所属分类: Oracle数据库方面

一:无返回值的存储过程

存储过程为:

CREATE OR REPLACE PROCEDURE TESTA(PARA1 IN VARCHAR2,PARA2 IN VARCHAR2)  AS

BEGIN

   INSERT INTO HYQ.B_ID (I_ID,I_NAME) VALUES (PARA1, PARA2);

END TESTA;

然后呢,在java里调用时就用下面的代码:

package com.hyq.src;

import java.sql.*;

import java.sql.ResultSet;

public class TestProcedureOne {

  public TestProcedureOne() {

  }

  public static void main(String[] args ){

    String driver = "oracle.jdbc.driver.OracleDriver";

    String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521: hyq ";

    Statement stmt = null;

    ResultSet rs = null;

    Connection conn = null;

    CallableStatement cstmt = null;

    try {

      Class.forName(driver);

      conn =  DriverManager.getConnection(strUrl, " hyq ", " hyq ");

      CallableStatement proc = null;

      proc = conn.prepareCall("{ call HYQ.TESTA(?,?) }");

      proc.setString(1, "100");

      proc.setString(2, "TestOne");

      proc.execute();

    }

    catch (SQLException ex2) {

      ex2.printStackTrace();

    }

    catch (Exception ex2) {

      ex2.printStackTrace();

    }

    finally{

      try {

        if(rs != null){

          rs.close();

          if(stmt!=null){

            stmt.close();

          }

          if(conn!=null){

            conn.close();

          }

        }

      }

      catch (SQLException ex1) {

      }

    }

  }

}

当然了,这就先要求要建张表TESTTB,里面两个字段(I_IDI_NAME)。

二:有返回值的存储过程(非列表)

存储过程为:

CREATE OR REPLACE PROCEDURE TESTB(PARA1 IN VARCHAR2,PARA2 OUT VARCHAR2)  AS

BEGIN

   SELECT INTO PARA2 FROM TESTTB WHERE I_ID= PARA1;

END TESTB;

java里调用时就用下面的代码:

package com.hyq.src;

public class TestProcedureTWO {

  public TestProcedureTWO() {

  }

  public static void main(String[] args ){

    String driver = "oracle.jdbc.driver.OracleDriver";

    String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521:hyq";

    Statement stmt = null;

    ResultSet rs = null;

    Connection conn = null;

    try {

      Class.forName(driver);

      conn =  DriverManager.getConnection(strUrl, " hyq ", " hyq ");

      CallableStatement proc = null;

      proc = conn.prepareCall("{ call HYQ.TESTB(?,?) }");

      proc.setString(1, "100");

      proc.registerOutParameter(2, Types.VARCHAR);

      proc.execute();

      String testPrint = proc.getString(2);

      System.out.println("=testPrint=is="+testPrint);

    }

    catch (SQLException ex2) {

      ex2.printStackTrace();

    }

    catch (Exception ex2) {

      ex2.printStackTrace();

    }

    finally{

      try {

        if(rs != null){

          rs.close();

          if(stmt!=null){

            stmt.close();

          }

          if(conn!=null){

            conn.close();

          }

        }

      }

      catch (SQLException ex1) {

      }

    }

  }

}

}

注意,这里的proc.getString(2)中的数值2并非任意的,而是和存储过程中的out列对应的,如果out是在第一个位置,那就是proc.getString(1),如果是第三个位置,就是proc.getString(3),当然也可以同时有多个返回值,那就是再多加几个out参数了。

三:返回列表

由于oracle存储过程没有返回值,它的所有返回值都是通过out参数来替代的,列表同样也不例外,但由于是集合,所以不能用一般的参数,必须要用pagkage.所以要分两部分,

1,  建一个程序包。如下:

CREATE OR REPLACE PACKAGE TESTPACKAGE AS

TYPE Test_CURSOR IS REF CURSOR;

end TESTPACKAGE;

2,建立存储过程,存储过程为:

CREATE OR REPLACE PROCEDURE TESTC(p_CURSOR out TESTPACKAGE.Test_CURSOR) IS

BEGIN

    OPEN p_CURSOR FOR SELECT * FROM HYQ.TESTTB;

END TESTC;

可以看到,它是把游标(可以理解为一个指针),作为一个out 参数来返回值的。

java里调用时就用下面的代码:

package com.hyq.src;

import java.sql.*;

import java.io.OutputStream;

import java.io.Writer;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import oracle.jdbc.driver.*;

public class TestProcedureTHREE {

  public TestProcedureTHREE() {

  }

  public static void main(String[] args ){

    String driver = "oracle.jdbc.driver.OracleDriver";

    String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521:hyq";

    Statement stmt = null;

    ResultSet rs = null;

    Connection conn = null;

    try {

      Class.forName(driver);

      conn =  DriverManager.getConnection(strUrl, "hyq", "hyq");

      CallableStatement proc = null;

      proc = conn.prepareCall("{ call hyq.testc(?) }");

      proc.registerOutParameter(1,oracle.jdbc.OracleTypes.CURSOR);

      proc.execute();

      rs = (ResultSet)proc.getObject(1);

      while(rs.next())

      {

          System.out.println("<tr><td>" + rs.getString(1) + "</td><td>"+rs.getString(2)+"</td></tr>");

      }

    }

    catch (SQLException ex2) {

      ex2.printStackTrace();

    }

    catch (Exception ex2) {

      ex2.printStackTrace();

    }

    finally{

      try {

        if(rs != null){

          rs.close();

          if(stmt!=null){

            stmt.close();

          }

          if(conn!=null){

            conn.close();

          }

        }

      }

      catch (SQLException ex1) {

      }

    }

  }

}

在这里要注意,在执行前一定要先把oracle的驱动包放到class路径里,否则会报错的。


只有注册用户登录后才能发表评论。


网站导航: