關於mybatis-plus 和 mybatis-plus-boot-starter 異同點分析

在采用mybatis-plus做代碼生成器時，我前面的文章https://blog.csdn.net/u012329294/article/details/90473681 講過，必須把其他的mybatis-plus刪掉，只留下mybatis-plus-boot-starter。

但用mybatis-plus-boot-starter生成的代碼，放在mybatis-plus依賴環境中，

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus</artifactId>
    <version>2.0.6</version>
</dependency>
<!--generator時使用-->
<!--<dependency>-->
    <!--<groupId>com.baomidou</groupId>-->
    <!--<artifactId>mybatis-plus-boot-starter</artifactId>-->
    <!--<version>2.2.0</version>-->
<!--</dependency>-->

總是報錯

   
   
  
  
          
 
           
 
            
 
             
 
            
 
            
 
             

               Whitelabel Error Page 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               This application has no explicit mapping 
              for /error, so you are seeing this as a fallback. 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             
 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               Thu May 
              23 
              14 
              : 
              54 
              :08 CST 
              2019 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               There was an unexpected error (type=Internal Server Error, status= 
              500). 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               Invalid bound statement ( 
              not found): com.mrk.dx.system.dao.SkyUserDao.selectList 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               org.apache.ibatis.binding. 
              BindingException: Invalid bound statement ( 
              not found): com.mrk.dx.system.dao.SkyUserDao.selectList 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod. 
              java: 
              232) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod. 
              java: 
              50) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at org.apache.ibatis.binding.MapperProxy.lambda$cachedMapperMethod$0(MapperProxy. 
              java: 
              62) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap. 
              java: 
              1660) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy. 
              java: 
              62) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy. 
              java: 
              57) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at com.sun.proxy.$Proxy101.selectList(Unknown Source) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at com.baomidou.mybatisplus.service.impl.ServiceImpl.selectList(ServiceImpl. 
              java: 
              292) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at com.baomidou.mybatisplus.service.impl.ServiceImpl$$FastClassBySpringCGLIB$$ 
              3e2398a4.invoke(<generated>) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy. 
              java: 
              218) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy. 
              java: 
              684) 
             
 
            
 
           
 
            
 
             
 
            
 
            
 
             

               at com.mrk.dx.system.service.impl.SkyUserServiceImpl$$EnhancerBySpringCGLIB$$d0192f7b.selectList(<generated>) 
             
 
            
 
          
  
  
 
 
         

這個報錯很有迷惑性，反復查找名字映射等都不行。

后來經過提醒才發覺，原來mybatis-plus並沒有自動生成那些命令。

即其中的selectList方法要自己來實現。

 

<?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.mrk.dx.system.dao.SkyUserDao">

    <!-- 通用查詢映射結果 -->
    <resultMap id="BaseResultMap" type="com.mrk.dx.system.entity.SkyUser">
        <id column="id" property="id" />
        <result column="name" property="name" />
        <result column="nickname" property="nickname" />
        <result column="sex" property="sex" />
        <result column="phone" property="phone" />
        <result column="identifier" property="identifier" />
        <result column="openid" property="openid" />
        <result column="created_at" property="createdAt" />
        <result column="updated_at" property="updatedAt" />
        <result column="headimgurl" property="headimgurl" />
        <result column="root_organization_ids" property="rootOrganizationIds" />
    </resultMap>

    <select id="selectList" resultMap="BaseResultMap"> select * from sky_user </select>

</mapper>

如上圖，加上紅色那一句后就可以了，這個耽誤了將近1天時間。

 而在mybatis-plus-boot-starter中不需要寫，它已經完全自動實現了。

 

因此，mybatis-plus 和 mybatis-plus-boot-starter 的主要異同點就在於：

mybatis-plus-boot-starter將xml中basemap中定義的id全部已經實現了，

而mybatis-plus這個包還需要自己實現basemap中的定義。