Java调用存储过程

Posted on 2008-01-26 16:00 flustar 阅读(244) 评论(0)  编辑  收藏 所属分类: Java

 

一:无返回值的存储过程

存储过程为:

create or replace procedure adddept(deptno number,dname varchar2,loc varchar2)

 as

begin

 insert into dept values(deptno,dname,loc);

 end;

然后呢,在java里调用时就用下面的代码:

public class TestProcedure {

Connection conn=null ;

CallableStatement cstmt=null ;

 PreparedStatement pstmt=null ;

String url="jdbc:oracle:thin:@localhost:1521:mydb";

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

String name="";

 public TestProcedure() {

 try {

 Class.forName(driver);

 conn=DriverManager.getConnection(url,"scott","tiger");

cstmt=conn.prepareCall("{call adddept(?,?,?)}");

cstmt.setInt(1,13);

 cstmt.setString(2,"间谍部2");

cstmt.setString(3,"ningbo2");

cstmt.executeUpdate();

 

 System.out.println("success");

 }

 catch (Exception e){e.printStackTrace();}

finally{

cstmt.close();

conn.close();

 }

 }

}

dept表为oracle数据库方案scott中的一个表

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( rs.getString(1) + "  "+rs.getString(2));

}

}

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) {

}

}

}

}


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