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springboot+mybatis环境

时间:2019-01-29 20:46:07      阅读:209      评论:0      收藏:0      [点我收藏+]

标签:对象数组   like   ace   group   主表   procedure   get   closed   tar   

1.springfox-swagger实体类无限递归

https://hacpai.com/article/1525674135818 里面有不完美的解决方案

不用动源码的解决方案也有,在swagger项目里的函数传入参数没有类互相包含就可以了

这也要求某些多对多关系的实体类的属性定义要仔细走关系图

比如User和SysClass,用在swagger传入参数的实体类不能互相包含List<SysClass>和List<User>

只能继承VO(这个VO不能作为swagger函数的传入参数),把对应的包含属性写进去,然后需要查询对应列表时返回VO就行了

 

2.有中间表的mybatis一对多查询

查看某些有明确一对多关系的实体类的mybatis xml,可以看到查询方式是主表join子表,然后在mybatis这端把主表的数据group起来作为某个对象的元素

由此可见没有直接关联的2个表对应的类也可以用这种方式查询

技术分享图片
<?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="com.xunfang.core.mapper.SysClassMapper">

    <!-- 可根据自己的需求,是否要使用 -->
    <resultMap type="com.xunfang.core.entity.SysClass" id="classMap">
        <result property="id" column="cid"/>
        <result property="code" column="code"/>
        <result property="name" column="name"/>
        <result property="num" column="num"/>
        <result property="description" column="description"/>
    </resultMap>
    <resultMap type="com.xunfang.core.VO.ClassWithUser" id="classUser">
        <result property="id" column="cid"/>
        <result property="code" column="code"/>
        <result property="name" column="name"/>
        <result property="num" column="num"/>
        <result property="description" column="description"/>
        <collection property="teachers" ofType="User">
            <id column="id" jdbcType="INTEGER" property="id" />
            <result column="uid" jdbcType="VARCHAR" property="uid" />
            <result column="user_account" jdbcType="VARCHAR" property="userAccount" />
            <result column="password" jdbcType="VARCHAR" property="password" />
            <result column="username" jdbcType="VARCHAR" property="username" />
            <result column="user_identity" jdbcType="INTEGER" property="userIdentity" />
            <result column="user_status" jdbcType="INTEGER" property="userStatus" />
            <result column="user_type" jdbcType="INTEGER" property="userType" />
            <result column="user_email" jdbcType="VARCHAR" property="userEmail" />
            <result column="user_mobile" jdbcType="VARCHAR" property="userMobile" />
            <result column="user_remind" jdbcType="VARCHAR" property="userRemind" />
            <result column="user_create_time" jdbcType="TIMESTAMP" property="userCreateTime" />
            <result column="user_update_time" jdbcType="TIMESTAMP" property="userUpdateTime" />
            <result column="class_id" jdbcType="VARCHAR" property="classId" />
            <result column="user_col2" jdbcType="VARCHAR" property="userCol2" />
            <result column="user_col3" jdbcType="VARCHAR" property="userCol3" />
            <result column="user_token" jdbcType="VARCHAR" property="userToken" />
            <result column="role_id" jdbcType="VARCHAR" property="roleId" />
        </collection>
    </resultMap>

    <select id="selectClassListByName" resultMap="classUser">
        SELECT
            c.id as cid,
            c.code,
            c.name,
            c.num,
            c.description,
            u.*
        FROM
            sys_class c
        LEFT JOIN user_class uc ON c.id = uc.class_id
        LEFT JOIN user u ON u.uid = uc.user_id
        WHERE
            c.name like ‘%${name}%‘
    </select>
    
</mapper>
SysClassMapper.xml

 

3.swagger传入参数含有对象数组时的坑点

swagger前端在碰到对象数组(无论是直接传的还是实体类里面的)时,会显示xxx[0].id和xxx[0].name之类的参数,但是直接通过前端发送请求,会因为url含有非法字符被拒绝请求

如果是用其他程序提交,例如Python,可以提交这种带对象数组的请求,并让服务器接收

技术分享图片
import requests
import json

def addContent():
    token = login()
    stepsjson = {"steps" : [{"procedureName":"a","procedureContent":"b"}]}
    params = {
        resourceSteps[0].procedureName: ytmym, 
        resourceSteps[0].procedureContent: mytm, 
        resourceSteps[2].procedureName: loveZJJ, 
        resourceSteps[2].procedureContent: asswecan, 
        id: 45, 
        resourceContentId: 45j45j, 
        experimentAdd: 5j5j, 
        experimentAdd1: grh, 
        stepsjson: [{"procedureName":"a","procedureContent":"b"}], 
        token: token, 
        resourceManagementId: j54j45j, 
        experimentalObjective: 45j45j4, 
        experimentalContext: 45j45j, 
        experimentalRequirements: 5j45j, 
        prepareKnowledge: 54j45j,
        experimentSummary: j54j, 
        experimentTestId: h4h54
    }
    url = http://localhost:20005/api/resource/add/content
    res = requests.post(url, params=params, verify=False)
    print(res.text)
#
addContent()
View Code

但是这种实现方式不太推荐,太不直观了。建议使用@ResponseBody注解对象数组或包含此类型的实体类,然后让前端传入json,处理会简单一些

 

springboot+mybatis环境

标签:对象数组   like   ace   group   主表   procedure   get   closed   tar   

原文地址:https://www.cnblogs.com/dgutfly/p/10335207.html

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