MyBatis 推荐的传参方式
如果要详细的学习 MyBatis,推荐看这个教程:https://www.w3cschool.cn/mybatis/
1. 单个参数
//接口方法int getAgeById(Integer id);//xml映射文件<select id="getAgeById" resultType="Integer"> select age from user where user_id = #{id}</select>
2. 多个参数
//接口方法 User login(@Param("username") String username, @Param("password") String password); //xml映射文件 <select id="login" resultMap="BaseResultMap"> select * from user where username = #{username} and password = #{password}</select>
3. 数组参数
//接口方法ArrayList<User> selectByIds(Integer [] ids);//xml映射文件<select id="selectByIds" resultMap="BaseResultMap"> select * from user where id in <foreach item="item" index="index" collection="array" open="(" separator="," close=")"> #{item} </foreach></select>
4.List参数
//接口方法ArrayList<User> selectByIds(List<Integer> ids);//xml映射文件<select id="selectByIds" resultMap="BaseResultMap"> Select <include refid="Base_Column_List" /> from jria where ID in <foreach item="item" index="index" collection="list" open="(" separator="," close=")"> #{item} </foreach> </select>