mybatis(一)

1.Mybatis映射文件完整模板参照
(github上应该有sample)

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"      
 "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">

<mapper namespace="test">
    <!-- parameterType:参数类型,填写实体类的完整名字 -->
    <insert id="save" parameterType="cn.chentging.mybatis.entity.Employee">
        insert into net_t_emp values(net_t_emp_seq.nextval,#{name},#{age})
    </insert>
    
    <select id="findAll" resultType="cn.chentging.mybatis.entity.Employee">
        select * from net_t_emp
    </select>
    
    <select id="findById" parameterType="int" resultType="cn.chentging.mybatis.entity.Employee">
        select * from net_t_emp where id=#{id1}
    </select>
    
    <update id="modify" parameterType="cn.chentging.mybatis.entity.Employee">
        update net_t_emp set name=#{name},age=#{age} where id=#{id}
    </update>
    
    <delete id="delete" parameterType="int">
        delete from net_t_emp where id=#{id1}
    </delete>
    
    <!-- 返回Map类型的结果  map是java.util.Map的简写形式-->
    <select id="findById2" parameterType="int" resultType="map">
        select * from net_t_emp where id=#{id1}
    </select>
    
    <!-- 使用resultMap解决表的字段名与实体类的属性名不一致的情况 -->
    <resultMap type="cn.chentging.mybatis.entity.Emp" id="empRestultMap">
        <result property="empNo" column="id"/>
        <result property="ename" column="name"/>
    </resultMap>
    
    <select id="findById3" parameterType="int" resultMap="empRestultMap">
        select * from net_t_emp where id=#{id1}
    </select>
</mapper>

2.使用xml文件进行映射时,文件路径要对应(也可以通过注解的方式映射)
mybatis(一)
[email protected](spring),@Mapper都是IOC的,自动注入。