java-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(); 

     }
 }