<!--连接数据库 需要使用mysql驱动做测试 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.36</version></dependency><!--使用spring boot 开发data-jpa项目的基础依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency>

#连接池的配置spring:datasource:driver-class-name: com.mysql.jdbc.Driverurl: jdbc:mysql://localhost:3306/springboot?characterEncoding=utf-8
username: rootpassword: rootjpa: hibernate:ddl-auto: update   #ddl-auto: create 每次都创建表，若存在则先删除 update 表不存在则创建，有更新字段才重新创建

package com.springboot.controller;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import com.springboot.dao.SellerRepository;import com.springboot.domain.Seller;@RestControllerpublic class SellerController {@Autowiredprivate SellerRepository sellerRepository;@RequestMapping("/addSeller")public String addSeller(Seller seller) {sellerRepository.save(seller);return "OK";}@RequestMapping("/sellerList")public List<Seller> sellerList() {return sellerRepository.findAll();}@RequestMapping("/updateSeller")public String updateSeller(Seller seller) {sellerRepository.save(seller);return "OK";}@RequestMapping("/deleteSeller")public String deleteSeller(Integer id) {sellerRepository.delete(id);return "OK";}}

http://localhost:8088/addSeller?sellerName=alibaba&age=18 添加成功

http://localhost:8088/sellerList 查询列表

http://localhost:8088/updateSeller?id=5&sellerName=alibaba5&age=25 更新成功

http://localhost:8088/deleteSeller?id=5 删除成功

package com.springboot.dao;import org.springframework.data.jpa.repository.JpaRepository;import com.springboot.domain.Seller;public interface SellerRepository extends JpaRepository<Seller, Integer> {Seller findById(Integer id);//不需要写实现方法，只需要按照规则编写方法名称

}