📜  iBATIS-存储过程

📅  最后修改于: 2020-11-16 08:15:29             🧑  作者: Mango


您可以使用iBATIS配置调用存储过程。首先,让我们了解如何在MySQL中创建存储过程。

我们在MySQL中有以下EMPLOYEE表-

CREATE TABLE EMPLOYEE (
   id INT NOT NULL auto_increment,
   first_name VARCHAR(20) default NULL,
   last_name  VARCHAR(20) default NULL,
   salary     INT  default NULL,
   PRIMARY KEY (id)
);

让我们在MySQL数据库中创建以下存储过程-

DELIMITER $$

   DROP PROCEDURE IF EXISTS `testdb`.`getEmp` $$
   CREATE PROCEDURE `testdb`.`getEmp` 
   (IN empid INT)
    
   BEGIN
      SELECT * FROM EMPLOYEE
      WHERE ID = empid;
   END $$

DELIMITER;

让我们考虑一下EMPLOYEE表具有两条记录,如下所示:

mysql> select * from EMPLOYEE;
+----+------------+-----------+--------+
| id | first_name | last_name | salary |
+----+------------+-----------+--------+
|  1 | Zara       | Ali       |   5000 |
|  2 | Roma       | Ali       |   3000 |
+----+------------+-----------+--------+
2 row in set (0.00 sec)

员工POJO班

要使用存储过程,您不需要修改Employee.java文件。让我们保持上一章的样子。

public class Employee {
   private int id;
   private String first_name; 
   private String last_name;   
   private int salary;  

   /* Define constructors for the Employee class. */
   public Employee() {}
  
   public Employee(String fname, String lname, int salary) {
      this.first_name = fname;
      this.last_name = lname;
      this.salary = salary;
   }

   /* Here are the required method definitions */
   public int getId() {
      return id;
   }
    
   public void setId(int id) {
      this.id = id;
   }
    
   public String getFirstName() {
      return first_name;
   }
    
   public void setFirstName(String fname) {
      this.first_name = fname;
   }
    
   public String getLastName() {
      return last_name;
   }
    
   public void setlastName(String lname) {
      this.last_name = lname;
   }
    
   public int getSalary() {
      return salary;
   }
    
   public void setSalary(int salary) {
      this.salary = salary;
   }

} /* End of Employee */

Employee.xml文件

在这里,我们将修改Employee.xml以引入 标记。在这里, 标记将具有一个ID,我们将在我们的应用程序中使用该ID来调用存储过程。






   
   
      INSERT INTO EMPLOYEE(first_name, last_name, salary)
      values (#first_name#, #last_name#, #salary#)

      
         select last_insert_id() as id
      
   

   
   

   
   
      UPDATE EMPLOYEE
      SET    first_name = #first_name#
      WHERE  id = #id#
   

   
   
      DELETE FROM EMPLOYEE
      WHERE  id = #id#
   

   
   
      { call getEmp( #acctID# ) } 
   
    
   
      
   


IbatisSP.java文件

该文件具有应用程序级逻辑,可使用ResultMap从Employee表读取雇员的姓名-

import com.ibatis.common.resources.Resources;
import com.ibatis.sqlmap.client.SqlMapClient;
import com.ibatis.sqlmap.client.SqlMapClientBuilder;

import java.io.*;
import java.sql.SQLException;
import java.util.*;

public class IbatisSP{
   public static void main(String[] args) throws IOException,SQLException{
   
      Reader rd = Resources.getResourceAsReader("SqlMapConfig.xml");
      SqlMapClient smc = SqlMapClientBuilder.buildSqlMapClient(rd);

      int id = 1;
      System.out.println("Going to read employee name.....");
      Employee e = (Employee) smc.queryForObject ("Employee.getEmpInfo", id);

      System.out.println("First Name:  " + e.getFirstName());
      System.out.println("Record name Successfully ");
   }
} 

编译并运行

这是编译和运行上述软件的步骤。在继续进行编译和执行之前,请确保已正确设置了PATH和CLASSPATH。

  • 如上所示创建Employee.xml。
  • 如上所示创建Employee.java并进行编译。
  • 如上所示创建IbatisSP.java并进行编译。
  • 执行IbatisSP二进制文件以运行程序。

您将得到以下结果-

Going to read employee name.....
First Name:  Zara
Record name Successfully