java挪用mysql存儲進程實例剖析。本站提示廣大學習愛好者:(java挪用mysql存儲進程實例剖析)文章只能為提供參考,不一定能成為您想要的結果。以下是java挪用mysql存儲進程實例剖析正文
本文實例講述了java挪用mysql存儲進程的辦法。分享給年夜家供年夜家參考。詳細以下:
數據庫的測試代碼以下 :
1、新建表test
create table test( field1 int not null ) TYPE=MyISAM ; insert into test(field1) values(1);
2、刪除已存在的存儲進程:
-- 刪除貯存進程 delimiter // -- 界說停止符號 drop procedure p_test;
3、mysql存儲進程界說:
create procedure p_test() begin declare temp int; set temp = 0; update test set field1 = values(temp); end
4、挪用辦法:
CallableStatement cStmt = conn.prepareCall("{call p_test()}");
cStmt.executeUpdate();
import java.sql.*;
/**
iGoder
*/
public class ProcedureTest {
/*
表和存儲進程界說以下:
delimiter //
DROP TABLE if exists test //
CREATE TABLE test(
id int(11) NULL
) //
drop procedure if existssp1 //
create procedure sp1(in p int)
comment 'insert into a int value'
begin
declare v1 int;
set v1 = p;
insert into test(id) values(v1);
end
//
drop procedure if exists sp2 //
create procedure sp2(out p int)
begin
select max(id) into p from test;
end
//
drop procedure if exists sp6 //
create procedure sp6()
begin
select * from test;
end//
*/
public static void main(String[] args) {
//callIn(111);
//callOut();
callResult();
}
/**
* 挪用帶有輸出參數的存儲進程
* @param in stored procedure input parametervalue
*/
public static void callIn(int in){
//獲得銜接
Connection conn = ConnectDb.getConnection();
CallableStatement cs = null;
try {
//可以直接傳入參數
//cs = conn.prepareCall("{call sp1(1)}");
//也能夠用問號取代
cs = conn.prepareCall("{call sp1(?)}");
//設置第一個輸出參數的值為110
cs.setInt(1, in);
cs.execute();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if(cs != null){
cs.close();
}
if(conn != null){
conn.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
/**
* 挪用帶有輸入參數的存儲進程
*
*/
public static void callOut() {
Connection conn = ConnectDb.getConnection();
CallableStatement cs = null;
try {
cs = conn.prepareCall("{call sp2(?)}");
//第一個參數的類型為Int
cs.registerOutParameter(1, Types.INTEGER);
cs.execute();
//獲得第一個值
int i = cs.getInt(1);
System.out.println(i);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if(cs != null){
cs.close();
}
if(conn != null){
conn.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
/**
* 挪用輸入成果集的存儲進程
*/
public static void callResult(){
Connection conn = ConnectDb.getConnection();
CallableStatement cs = null;
ResultSet rs = null;
try {
cs = conn.prepareCall("{call sp6()}");
rs = cs.executeQuery();
//輪回輸入成果
while(rs.next()){
System.out.println(rs.getString(1));
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if(rs != null){
rs.close();
}
if(cs != null){
cs.close();
}
if(conn != null){
conn.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
}
/**
*獲得數據庫銜接的類
*/
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
class ConnectDb {
public static Connection getConnection(){
Connection conn = null;
PreparedStatement preparedstatement = null;
try {
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
String dbname = "test";
String url="jdbc:mysql://localhost/"+dbname+"?user=root&password=root&useUnicode=true&characterEncoding=8859_1";
conn= DriverManager.getConnection(url);
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
}
願望本文所述對年夜家的java法式設計有所贊助。