SpringBoot数据库增删改查 事务管理

数据库依赖

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

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

application.xml

spring:
profiles:
active: dev
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/dbgirl
username: root
password: root
jpa:
hibernate:
ddl-auto: create
show-sql: true

ddl-auto: create

每次都会重新创建表 如果之前存在该表 则会先删除

Hibernate: drop table if exists girl
Hibernate: create table girl (id integer not null auto_increment, age integer, cup_size varchar(255), primary key (id))

ddl-auto: update

只是更新 之前的数据并不会消失

ddl-auto: create-frop

应用停下来的时候将会删除表

ddl-auto: none

默认 什么都不做

ddl-auto: validate

验证类里面的熟悉跟表结构是否一致 如果不一致的话会报错

实体类
Girl.java

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

/**
* Created by Jeremy_Lin on 2017/6/17.
*/
@Entity
public class Girl {

@Id
@GeneratedValue
private Integer id;

private String cupSize;

private Integer age;

public Girl() {

}

public Integer getId() {
return id;
}

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

public String getCupSize() {
return cupSize;
}

public void setCupSize(String cupSize) {
this.cupSize = cupSize;
}

public Integer getAge() {
return age;
}

public void setAge(Integer age) {
this.age = age;
}

}

GirlRepository.java

import org.springframework.data.jpa.repository.JpaRepository;

import java.util.List;

public interface GirlRepository extends JpaRepository<Girl, Integer> {

// 通过年龄来查询
// 有可能查询到多个
// 所以返回List
// 方法名不能乱写
// 有格式要求
public List<Girl> findByAge(Integer age);

}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
* Created by Jeremy_Lin on 2017/6/18.
*/
@Service
public class GirlService {

@Autowired
private GirlRepository girlRepository;

// 事务管理
@Transactional
public void insertTwo() {

Girl girlA = new Girl();
girlA.setCupSize("A");
girlA.setAge(18);
girlRepository.save(girlA);

Girl girlB = new Girl();
girlB.setCupSize("BBBB");
girlB.setAge(19);
girlRepository.save(girlB);

}

}

GirlController.java

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
* Created by Jeremy_Lin on 2017/6/17.
*/
@RestController
public class GirlController {

@Autowired
private GirlRepository girlRepository;

@Autowired
private GirlService girlService;

/**
* 查询所有女生列表
* @return
*/
@GetMapping(value="/girls")
public List<Girl> girlList() {
return girlRepository.findAll();
}

/**
* 添加一个女生
* @param cupSize
* @param age
* @return
*/
@PostMapping(value="/girls")
public Girl girlAdd(@RequestParam("cupSize") String cupSize,
@RequestParam("age") Integer age) {
Girl girl = new Girl();
girl.setCupSize(cupSize);
girl.setAge(age);

return girlRepository.save(girl);

}

// 查询一个女生
@GetMapping(value="/girls/{id}")
public Girl girlFindOne(@PathVariable("id") Integer id) {
return girlRepository.findOne(id);
}

// 更新
@PutMapping(value="girls/{id}")
public Girl girlUpdate(@PathVariable("id") Integer id,
@RequestParam("cupSize") String cupSize,
@RequestParam("age") Integer age) {

Girl girl = new Girl();
girl.setId(id);
girl.setCupSize(cupSize);
girl.setAge(age);

return girlRepository.save(girl);

}

// 删除
@DeleteMapping(value="girls/{id}")
public void girlDelete(@PathVariable("id") Integer id) {
girlRepository.delete(id);
}

// 通过年龄查询女生列表
@GetMapping(value="/girls/age/{age}")
public List<Girl> girlListByAge(@PathVariable("age") Integer age) {
return girlRepository.findByAge(age);
}

@PostMapping(value="/girls/two")
public void girlTwo() {
girlService.insertTwo();
}

}

代码地址：http://download.csdn.net/detail/duanliuchang/9873773