在实际使用中,使用Spring Boot默认的配置就能满足我们绝大多数需求。在本节的实战里,我们将演示如何使用@Transactional使用异常导致数据回滚和使用异常让数据不会滚。
1.新建Spring Boot项目
新建Spring Boot项目,依赖为JPA,Web。由于本项目连接了SQL Server数据库,因此多一个依赖SQL Server。
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.jxufe</groupId>
<artifactId>demopro</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demopro</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>mssql-jdbc</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2.实体类
package com.jxufe.demopro.domain;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class Person {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String name;
private Integer age;
private String address;
public Person() {
super();
}
public Person(Long id, String name, Integer age, String address) {
super();
this.id = id;
this.name = name;
this.age = age;
this.address = address;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
3.实体类Repository
package com.jxufe.demopro.dao;
import org.springframework.data.jpa.repository.JpaRepository;
import com.jxufe.demopro.domain.Person;
public interface PersonRepository extends JpaRepository<Person, Long> {
}
4.业务服务Service
(1)服务接口:
package com.jxufe.demopro.service;
import com.jxufe.demopro.domain.Person;
public interface DemoService {
public Person savePersonWithRollBack(Person person);
public Person savePersonWithoutRollBack(Person person);
}
(2)服务实现:
package com.jxufe.demopro.service.impl;
import javax.transaction.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.jxufe.demopro.dao.PersonRepository;
import com.jxufe.demopro.domain.Person;
import com.jxufe.demopro.service.DemoService;
@Service
public class DemoServiceImpl implements DemoService{
@Autowired
private PersonRepository personRepository;
@Transactional(rollbackOn = {IllegalArgumentException.class})
@Override
public Person savePersonWithRollBack(Person person) {
Person p = personRepository.save(person);
if(p.getName().equals("徐彤")) {
throw new IllegalArgumentException("徐彤已经存在,数据将回滚!!");
}
return p;
}
@Transactional(dontRollbackOn = {IllegalArgumentException.class})
@Override
public Person savePersonWithoutRollBack(Person person) {
Person p = personRepository.save(person);
if(p.getName().equals("徐彤")) {
throw new IllegalArgumentException("徐彤已经存在,但不会回滚!!");
}
return p;
}
}
5.控制器
package com.jxufe.demopro.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.jxufe.demopro.domain.Person;
import com.jxufe.demopro.service.DemoService;
@RestController
public class MyController {
@Autowired
private DemoService demoService;
@RequestMapping("/rollback")
public Person rollback(Person person) {
return demoService.savePersonWithRollBack(person);
}
@RequestMapping("/norollback")
public Person noRollback(Person person) {
return demoService.savePersonWithoutRollBack(person);
}
}
6.application.properties
server.port=8443
spring.datasource.driver-class-name=com.microsoft.sqlserver.jdbc.SQLServerDriver
spring.datasource.url=jdbc:sqlserver://127.0.0.1:1433; databaseName=Person
spring.datasource.username=sa
spring.datasource.password=12345678
经过测试,上述代码可以成功运行。