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java调用oracle存储过程

 
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原文出处不详

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。



补充一个使用oracle存储过程分页的小例子:
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,lowerNum in numeric,higherNum in numeric) is
begin
OPEN p_CURSOR FOR select * from ( select row_.*, rownum rownum_ from (select id,title,status from HYQTEST) row_ where rownum <= higherNum) where rownum_ >lowerNum;
end TESTC;

使用plsql测试:
declare
lowerNum integer;
higherNum integer;
id varchar2(10);
title varchar2(500);
status numeric;
c testpackage.Test_CURSOR;
rownum_ integer;
begin
lowerNum:=1;
higherNum:=10;
TESTC(c,lowerNum,higherNum);
LOOP
FETCH c INTO id,title,status,rownum_;
EXIT WHEN c%NOTFOUND;
DBMS_OUTPUT.PUT_LINE('=行号='||rownum_||'=='||id||'==='||title||'===='||status||'==');
END LOOP;
CLOSE c;

end;

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