比如说，我们User表UserDao整一个UserDao接口packagenet.sunofbeaches.dao;importnet.sunofbeaches.pojo.User;importorg.springframework.data.jpa.repository.JpaRepository

persistence/SynchronizationType;以上是报错信息贴代码userdao类packagenet.sunofbeach.blog.dao;importnet.sunofbeach.blog.pojo.SobUser

org.apache.solr.client.solrj.beans.BindingException:Couldnotinstantiateobjectofclasscom.blog.pojo.SearchResultatorg.apache.solr.client.solrj.beans.DocumentObjectBinder.getBean

;}添加用户创建一个服务UserServiceImpl，实现接口IUserServicepackagenet.sunofbeaches.services;importnet.sunofbeaches.pojo.User

编写数据库DAO接口：packagecom.sunofbeaches.contentproviderdemo.dao;importcom.sunofbeaches.contentproviderdemo.pojo.User

net.sunofbeach.blog.dao.SettingsDao;

import net.sunofbeach.blog.dao.UserDao;

import net.sunofbeach.blog.pojo.Settings

通过学习康师傅的后台教学视频，掌握了单实体对应单表的Dao写法，案例如下pojo实体类@Entity@Table(name="table")publicclassTestEntity

再大胆的尝试我们尝试返回一个学生对象看看再写一个接口，并且修改一下接口规范packagenet.sunofbeaches.controller;importnet.sunofbeaches.pojo.Student

SELECTIONIterable<DasObject>*PROJECTproject*FILESfileshelper*/packageName="cn.ithers.blog.pojo

SELECTIONIterable<DasObject>*PROJECTproject*FILESfileshelper*/packageName="net.sunofbeach.blog.pojo

System.out.println(dataSource.getClass());System.out.println(dataSource.getConnection());}}构建实体类packagecom.example.pojo

; return ResponseResult.SUCCESS("friend lind added success");     } }

FriendLink pojo

ontopublicnet.wzfBoke.blog.response.ResponseResultnet.wzfBoke.blog.controller.admin.LooperAdminApi.addLoop(net.wzfBoke.blog.pojo.Looper

pojo我们创建了一个包，叫做pojopojo的原单词是什么呢？PlainOrdinaryJavaObject翻译过来大概是简单的java对象。

packagenet.sunofbeach.mapper;importcom.baomidou.mybatisplus.core.mapper.BaseMapper;importnet.sunofbeach.pojo.User

注：使用Dubbo的Service注解，表明为该业务类对象为远程暴露的对象mapper层：数据库操作pojo层：实体类④创建application.yml文件##配置Zookeeper的连接信息dubbo

atjavassist.util.proxy.ProxyFactory.createClass(ProxyFactory.java:422)~[javassist-3.22.0-GA.jar:na]atorg.hibernate.proxy.pojo.javassist.JavassistProxyFactory.postInstantiate

packagenet.wzfBoke.blog.services.impl;importlombok.extern.slf4j.Slf4j;importnet.wzfBoke.blog.dao.MessageDao;importnet.wzfBoke.blog.pojo.Message