MyBatis中的mapper.xml配置教程

<!--    配置我们的添加方法，获取到新增加了一个monster对象的id
        useGeneratedKeys="true" 意思是需要获取新加对象的主键值
        keyProperty="monster_id" 表示将获取到的id值赋值给Monster对象的monster_id属性
-->
    <insert id="addMonster" parameterType="Monster"
    useGeneratedKeys="true" keyProperty="monster_id">
        INSERT INTO mybatis_monster_ (monster_id,age,birthday,email,gender,name,salary)
        VALUES (#{monster_id},#{age},#{birthday},#{email},#{gender},#{name},#{salary})
    </insert>

  @Test
    public void testAdd() {
        Monster monster = new Monster();
        for(int i=10;i<20;i++) {
            monster.setAge(100+i);
            monster.setBirthday(new Date());
            monster.setEmail("123@qq.com");
            monster.setGender(1);
            monster.setSalary(8928.00);
            monster.setName("银角"+i);
            monsterMapper.addMonster(monster);
            System.out.println("获取添加的对象id" + monster.getMonster_id());
        }
    }

public Monster findByName(String name);

<select id="findByName" resultType="com.bin.mybatis.entity.Monster" parameterType="String">
       SELECT * FROM mybatis_monster_
       WHERE name like '%${name}%'
   </select>

 
//    查询id>10而且salary大于40的所有妖怪
    public List<Monster> findMonsterByIdAndSalary(Map<String,Object> map);

    <select id="findMonsterByIdAndSalary" resultType="com.bin.mybatis.entity.Monster" parameterType="Map">
        SELECT * FROM mybatis_monster_
        WHERE monster_id>#{monster_id} AND salary>#{salary}
    </select>

  @Test
    public void findMonsterByIdAndSalary(){
        Map<String, Object> map = new HashMap<String,Object>();
        map.put("monster_id", 6);
        map.put("salary", 1234);
        List<Monster> monsterList = monsterMapper.findMonsterByIdAndSalary(map);
        for (Monster monster : monsterList) {
            System.out.println(monster);
        }
    }

 //    查询id>10而且salary大于40的所有妖怪
    //  第二种写法：参数和返回类型都是Map
    public Map<String,Object> findMonsterByIdAndSalary2(Map<String,Object> map);

  <select id="findMonsterByIdAndSalary2" resultType="Map" parameterType="Map">
        SELECT * FROM mybatis_monster_
        WHERE monster_id>#{monster_id} AND salary>#{salary}
    </select>

 
    @Test
    public void findMonsterByIdAndSalary(){
        Map<String, Object> map = new HashMap<String,Object>();
        map.put("monster_id", 6);
        map.put("salary", 1234);
        List<Monster> monsterList = monsterMapper.findMonsterByIdAndSalary(map);
        for (Monster monster : monsterList) {
            System.out.println(monster);
        }
    }