1:顺序传递参数
#{}
里面的数字代表你传入参数的顺序。
public User selectUser(String name, int deptId); <select id="selectUser" resultMap="UserResultMap"> select * from user where user_name = #{0} and dept_id = #{1} </select>
2:@Param注解传参法
#{}里面的名称对应的是注解@Param括号里面修饰的名称。
public User selectUser(@Param("userName") String name, int @Param("deptId") deptId); <select id="selectUser" resultMap="UserResultMap"> select * from user where user_name = #{userName} and dept_id = #{deptId} </select>
3:Map传参法
#{}里面的名称对应的是Map里面的key名称。
public User selectUser(Map<String, Object> params); <select id="selectUser" parameterType="java.util.Map" resultMap="UserResultMap"> select * from user where user_name = #{userName} and dept_id = #{deptId} </select>
4:Java Bean传参法
参数以Bean形式传入,这种方法很直观,但需要建一个实体类
UserPageRequestParams(请求体),扩展时需要向类中添加属性
Page<User> pageWithBean(Page page, @Param("params") UserPageRequestParams params); <select id="pageWithBean" resultType="michael.spica.entity.mybatisplus.User"> SELECT * FROM tb_user u <where> <if test="null != params.name"> AND u.name LIKE CONCAT('%',#{params.name},'%') </if> <if test="null != params.email"> AND u.email LIKE CONCAT('%',#{params.email},'%') </if> <if test="null != params.phoneType"> AND u.phone_type = #{params.phoneType} </if> <if test="null != params.gender"> AND u.gender = #{params.gender} </if> </where> </select>