本文目录一览：
java里面怎么调用mysql的存储过程的
java代码:
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager
.getConnection("jdbc:mysql://localhost:3306/test?user=rootpassword=111111");
String sql = "{call sel(?)}";
CallableStatement cs = (CallableStatement)con.prepareCall(sql);
cs.execute();
String name = cs.getString(1);
System.out.println(name);
创建存储过程代码:
drop procedure if exists sel;
create procedure sel(out name1 varchar(225))
begin
select name into name1 from a limit 1;
end
输出结果:
求助JAVA调用MYSQL存储过程的问题
书上说的太复杂了而且不易理解，楼上的复制粘贴的我看不懂估计你更看不懂，我就简单说吧：
比如我们要执行mysql中的student表，执行一条查询语句select
*
from
student
java中写一个实体类student，包含所有student表中的所有属性，如name,age,score等
选择jdbc的数据库沟通方式，建立connection,paredstatement;
connection中写数据库名，driver名，用户名，密码；
建立String类型sqlStr中写入sql语句select
*
from
student
，
调用parestatement的query方法将sqlStr作为参数传过去;就好了；
query方法会返回一个resultSet类型的结果集，拿到它就成功了；
java 怎么调用mysql 存储过程
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Types;
/*
* 对应的存储过程
DROP PROCEDURE IF EXISTS `pro_num_user`;
delimiter ;;
CREATE PROCEDURE `pro_num_user`(IN user_name varchar(10) ,OUT count_num INT)
READS SQL DATA
BEGIN
SELECT COUNT(*) INTO count_num FROM tab_user WHERE 'name'=user_name;
END
;;
delimiter ;
*/
public class Test {
public static final String DRIVER_CLASS = "com.mysql.jdbc.Driver";
public static final String URL = "jdbc:mysql://127.0.0.1:3306/test";
public static final String USERNAME = "root";
public static final String PASSWORD = "acbee";
public static void main(String[] args) throws Exception {
test1();
test2();
}
public static void test1() throws Exception
{
Class.forName(DRIVER_CLASS);
Connection connection = DriverManager.getConnection(URL, USERNAME, PASSWORD);
String sql = "{CALL pro_num_user(?,?)}"; //调用存储过程
CallableStatement cstm = connection.prepareCall(sql); //实例化对象cstm
cstm.setString(1, "myd"); //存储过程输入参数
//cstm.setInt(2, 2); // 存储过程输入参数
cstm.registerOutParameter(2, Types.INTEGER); // 设置返回值类型 即返回值
cstm.execute(); // 执行存储过程
System.out.println(cstm.getInt(2));
cstm.close();
connection.close();
}
public static void test2() throws Exception
{
Class.forName(DRIVER_CLASS);
Connection connection = DriverManager.getConnection(URL, USERNAME, PASSWORD);
String sql = "{CALL pro_number(?,?,?)}"; //调用存储过程
CallableStatement cstm = connection.prepareCall(sql); //实例化对象cstm
cstm.setInt(1, 2); // 存储过程输入参数
cstm.setInt(2, 2); // 存储过程输入参数
cstm.registerOutParameter(3, Types.INTEGER); // 设置返回值类型 即返回值
cstm.execute(); // 执行存储过程
System.out.println(cstm.getInt(3));
cstm.close();
connection.close();
}
}
