MyBatis如何调用存储过程与存储函数

<!-- 存储过程 -->
<select id="selectSomeThing" statementType="CALLABLE" parameterType="HashMap" resultType="com.pjb.mybatis.po.User">
    {CALL PROC_FOR_INPUT(#{infORMation,mode=IN,jdbcType=VARCHAR})}
</select>

-- 创建“用户信息”数据表
CREATE TABLE IF NOT EXISTS tb_user
( 
	id INT AUTO_INCREMENT PRIMARY KEY COMMENT '用户编号',
	user_name VARCHAR(50) NOT NULL COMMENT '用户姓名',
	sex CHAR(2) DEFAULT '男' COMMENT '性别'
) COMMENT = '用户信息表';

-- 将结束标志符更改为$$
DELIMITER $$
 

CREATE PROCEDURE proc_search_user(IN page_index INT,IN page_size INT, OUT total_count INT, OUT total_page INT)
BEGIN
	DECLARE begin_no INT;
	SET begin_no = (page_index-1)*page_size;
 
	-- 分页查询列表
	SELECT * FROM tb_user
	WHERE id >= (
		SELECT id FROM tb_user
		ORDER BY id ASC
		LIMIT begin_no,1
	)
	ORDER BY id ASC
	LIMIT page_size;
 
	-- 计算数据总数
	SELECT COUNT(1) INTO total_count FROM tb_user;
 
	-- 计算总页数
	SET total_page = FLOOR((total_count + page_size - 1) / page_size);
END$$
 
-- 将结束标志符更改回分号
DELIMITER ;

package com.pjb.mybatis.po;
 

public class User
{
    private int id; //用户编号
    private String userName; //用户姓名
    private String sex; //性别
 
    //省略getter与setter方法...
}

<!-- 存储过程：分页查询用户列表，并返回数据总数和总页数 -->
<select id="proc_search_user" statementType="CALLABLE" parameterType="hashmap" resultType="com.pjb.mybatis.po.User">
    {CALL proc_search_user(#{page_index,mode=IN,jdbcType=INTEGER},
      #{page_size,mode=IN,jdbcType=INTEGER},
      #{total_count,mode=OUT,jdbcType=INTEGER},
      #{total_page,mode=OUT,jdbcType=INTEGER})}
</select>

@Test
public void procSearchUser()
{
    DataConnection dataConnection = new DataConnection();
    SqlSession sqlSession = dataConnection.getSqlSession();
    //封装查询参数
    Map params = new HashMap();
    params.put("page_index",2);  //输入参数：当前页码
    params.put("page_size",10);  //输入参数：分页大小
    params.put("total_count",0); //输出参数：数据总数
    params.put("total_page",0);  //输出参数：总页数
    //调用存储过程
    List<User> userList = sqlSession.selectList("test.proc_search_user",params);
    System.out.println("查询第"+ params.get("page_index") +"页的数据，每页共"+params.get("page_size")+"条数据");
    //遍历用户列表
    for (User user : userList)
    {
        System.out.println("编号：" + user.getId() +" 姓名：" + user.getUserName() + " 性别：" + user.getSex());
    }
    //获取输出参数
    System.out.println("数据总数：" + params.get("total_count"));
    System.out.println("总页数：" + params.get("total_page"));
    sqlSession.close();
}

-- 将结束标志符更改为$$
DELIMITER $$
 

CREATE PROCEDURE proc_add_user(IN user_name VARCHAR(50),IN sex CHAR(2), OUT user_id INT)
BEGIN
	-- 新增用户
	INSERT INTO tb_user(user_name,sex) VALUE (user_name,sex);
	
	-- 获取自增主键
	SELECT LAST_INSERT_ID() INTO user_id;
END$$
 
-- 将结束标志符更改回分号
DELIMITER ;

<!-- 存储过程：新增用户信息，返回自增主键 -->
<insert id="proc_add_user" statementType="CALLABLE" parameterType="com.pjb.mybatis.po.User">
  {CALL proc_add_user(#{userName,mode=IN,jdbcType=VARCHAR},
    #{sex,mode=IN,jdbcType=CHAR},
    #{id,mode=OUT,jdbcType=INTEGER})}
</insert>

@Test
public void procAddUser()
{
    DataConnection dataConnection = new DataConnection();
    SqlSession sqlSession = dataConnection.getSqlSession();
    //新增的用户对象
    User user = new User();
    user.setUserName("pan_junbiao的博客");
    user.setSex("男");
    //调用存储过程执行新增
    int reuslt = sqlSession.insert("test.proc_add_user",user);
    sqlSession.commit();
    //打印结果
    System.out.println("执行结果："+reuslt);
    System.out.println("自增主键："+user.getId());
    sqlSession.close();
}

<!-- 存储过程：新增用户信息，返回自增主键 -->
<insert id="proc_add_user" statementType="CALLABLE" parameterType="com.pjb.mybatis.po.User">
  <selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">
      SELECT LAST_INSERT_ID()
  </selectKey>
  {CALL proc_add_user(#{userName,mode=IN,jdbcType=VARCHAR},
    #{sex,mode=IN,jdbcType=CHAR})}
</insert>

-- 将结束标志符更改为$$
DELIMITER $$
 

CREATE FUNCTION func_get_user_name(in_id INT)
RETURNS VARCHAR(50)
BEGIN
	-- 定义返回变量
	DECLARE out_name VARCHAR(50);
 
	-- 查询用户信息，获取用户名称
	SELECT user_name INTO out_name FROM tb_user WHERE id = in_id;
 
	-- 返回结果
	RETURN out_name;
END$$
 
-- 将结束标志符更改回分号
DELIMITER ;

<!-- 存储函数：根据用户编号，获取用户名称 -->
<select id="func_get_user_name" statementType="CALLABLE" parameterType="hashMap" >
    {#{userName,mode=OUT,jdbcType=VARCHAR} = CALL func_get_user_name(#{userId,mode=IN,jdbcType=INTEGER})}
</select>

@Test
public void funcGetUserName()
{
    DataConnection dataConnection = new DataConnection();
    SqlSession sqlSession = dataConnection.getSqlSession();
    //封装参数
    Map userMap = new HashMap();
    userMap.put("userName","");
    userMap.put("userId",8);
    sqlSession.selectOne("test.func_get_user_name",userMap);
    System.out.println("用户名称：" + userMap.get("userName"));
    sqlSession.close();
}