Spring boot基于JPA访问MySQL数据库的实现

<dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
</dependency>

spring.jpa.hibernate.ddl-auto=create
spring.datasource.url=jdbc:mysql://localhost:3306/db_example
spring.datasource.username=springuser
spring.datasource.password=ThePassword

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity // This tells Hibernate to make a table out of this class
public class User {
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private Integer id;
    private String name;
private String email;
//此处省略get和set
}

public interface UserRepository extends PagingAndSortingRepository<User, Long> {
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import com.yuny.jpademo.pojo.User;
import com.yuny.jpademo.repository.UserRepository;
@RestController
public class UserController {
    @Autowired
    private UserRepository userRepository;
    
    //测试插入新的数据
    @GetMapping(path="/add")
    public @ResponseBody String addNewUser (@RequestParam String name
            , @RequestParam String email) {
        
        User n = new User();
        n.setName(name);
        n.setEmail(email);
        userRepository.save(n);
        return "保存成功";
    }
    
    //测试获取全部的数据
    @GetMapping(path="/all")
    public Iterable<User> getAllUsers() {
        return userRepository.findAll();
    }
}