1、QueryVo实体类,用于封装多个条件
package cn.gpxxg.domain;
import java.util.List;
public class QueryVo {
private User user;
private List<Integer> userIds;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public List<Integer> getUserIds() {
return userIds;
}
public void setUserIds(List<Integer> userIds) {
this.userIds = userIds;
}
}
2、userDao的mapper配置文件,执行sql语句
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="cn.gpxxg.dao.UserDao">
<!-- 查询所有 -->
<select id="findByCondition" resultType="cn.gpxxg.domain.User" parameterType="cn.gpxxg.domain.QueryVo">
select * from user
<where>
<!-- like条件 -->
<if test="user.username != null">
AND username LIKE #{user.username}
</if>
<!-- in条件 -->
<if test="userIds != null and userIds.size > 0">
<foreach collection="userIds" open=" and id in(" close=")" item="uid" separator=",">
#{uid}
</foreach>
</if>
</where>
</select>
</mapper>
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