本文yjbys小编为大家主要介绍了Java调用MySQL存储过程并获得返回值的方法,实例分析了java实现MySQL存储过程的相关技巧,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了Java调用MySQL存储过程并获得返回值的方法。分享给大家供大家参考。具体如下:
private void empsInDept(Connection myConnect, int deptId) throws SQLException {
CallableStatement cStmt = areCall("{CALL sp_emps_in_dept(?)}");
nt(1, deptId);
ute();
ResultSet rs1 = esultSet();
while (()) {
tln(tring("department_name") + " " + tring("location"));
}
e();
/* process second result set */
if (oreResults()) {
ResultSet rs2 = esultSet();
while (()) {
tln(nt(1) + " " + tring(2) + " " + tring(3));
}
e();
}
e();
}
本文实例讲述了java调用mysql存储过程的方法。分享给大家供大家参考。具体如下:
1、新建表test
create table test(
field1 int not null
)
TYPE=MyISAM ;
insert into test(field1) values(1);
2、删除已存在的存储过程:
-- 删除储存过程
delimiter // -- 定义结束符号
drop procedure p_test;
3、mysql存储过程定义:
create procedure p_test()
begin
declare temp int;
set temp = 0;
update test set field1 = values(temp);
end
4、调用方法:
CallableStatement cStmt = areCall("{call p_test()}");
uteUpdate();
import .*;
/**
iGoder
*/
public class ProcedureTest {
/*
表和存储过程定义如下:
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();
}
/**
* 调用带有输入参数的存储过程
* @param in stored procedure input parametervalue
*/
public static void callIn(int in){
//获取连接
Connection conn = onnection();
CallableStatement cs = null;
try {
//可以直接传入参数
//cs = areCall("{call sp1(1)}");
//也可以用问号代替
cs = areCall("{call sp1(?)}");
//设置第一个输入参数的`值为110
nt(1, in);
ute();
} catch (Exception e) {
tStackTrace();
} finally {
try {
if(cs != null){
e();
}
if(conn != null){
e();
}
} catch (Exception ex) {
tStackTrace();
}
}
}
/**
* 调用带有输出参数的存储过程
*
*/
public static void callOut() {
Connection conn = onnection();
CallableStatement cs = null;
try {
cs = areCall("{call sp2(?)}");
//第一个参数的类型为Int
sterOutParameter(1, GER);
ute();
//得到第一个值
int i = nt(1);
tln(i);
} catch (Exception e) {
tStackTrace();
} finally {
try {
if(cs != null){
e();
}
if(conn != null){
e();
}
} catch (Exception ex) {
tStackTrace();
}
}
}
/**
* 调用输出结果集的存储过程
*/
public static void callResult(){
Connection conn = onnection();
CallableStatement cs = null;
ResultSet rs = null;
try {
cs = areCall("{call sp6()}");
rs = uteQuery();
//循环输出结果
while(()){
tln(tring(1));
}
} catch (Exception e) {
tStackTrace();
} finally {
try {
if(rs != null){
e();
}
if(cs != null){
e();
}
if(conn != null){
e();
}
} catch (Exception ex) {
tStackTrace();
}
}
}
}
/**
*获取数据库连接的类
*/
import ection;
import erManager;
import aredStatement;
import ltSet;
import xception;
import ement;
class ConnectDb {
public static Connection getConnection(){
Connection conn = null;
PreparedStatement preparedstatement = null;
try {
ame("er")nstance();
String dbname = "test";
String url="jdbc:mysql://localhost/"+dbname+"?user=root&password=root&useUnicode=true&characterEncoding=8859_1";
conn= onnection(url);
} catch (Exception e) {
tStackTrace();
}
return conn;
}
}
希望本文所述对大家的java程序设计有所帮助。