1.依赖

2.新增model

3.新增接口

4.测试

一 依赖

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

二 新增model

 

package com.ligy.springbootstudyjpa.model;

import javax.persistence.*;

@Entity
@Table(name = "account")
public class Account {
    @Id
    @Column(name = "id")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
    @Column(name = "username")
    private String username;
    @Column(name = "password")
    private String password;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

 

三 新增接口

 

package com.ligy.springbootstudyjpa.repository;

import com.ligy.springbootstudyjpa.model.Account;
import org.springframework.data.jpa.repository.JpaRepository;

public interface AccountRepository extends JpaRepository<Account, Integer> {
}

 

 

 

 

 

四 测试

 

package com.ligy.springbootstudyjpa;

import com.ligy.springbootstudyjpa.model.Account;
import com.ligy.springbootstudyjpa.repository.AccountRepository;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

import javax.annotation.Resource;
import java.util.List;

@SpringBootTest
public class JpaTest {
    @Resource
    AccountRepository accountRepository;
    @Test
    void test4() {
        Account account = accountRepository.findById(1).get();
        System.out.println("查询成功：" + account);

        account.setPassword("11111111");
        accountRepository.save(account);
        System.out.println("更新成功：" + account);
    }
    @Test
    void test3() {
        List<Account> all = accountRepository.findAll();
        System.out.println("查询成功：" + all);
    }

    @Test
    void test2() {
        Account account = new Account();
        account.setId(3);
        accountRepository.delete(account);
        System.out.println("删除成功：");
    }

    @Test
    void test1() {
        Account account = new Account();
        account.setUsername("tom");
        account.setPassword("123456");

        Account save = accountRepository.save(account);
        System.out.println("插入成功：" + save);
    }
}