基于纯注解的声明式事务管理,可以根据xml配置来一步步的理解改进
pom依赖
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.5</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13</version>
</dependency>
</dependencies>
实体类
package com.lp.domain;
import java.io.Serializable;
/**
* 账户的实体类
*/
public class Account implements Serializable {
private Integer id;
private String name;
private Float money;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Float getMoney() {
return money;
}
public void setMoney(Float money) {
this.money = money;
}
@Override
public String toString() {
return "Account{" +
"id=" + id +
", name='" + name + '\'' +
", money=" + money +
'}';
}
}
dao层实现类
package com.lp.dao.impl;
import com.lp.dao.IAccountDao;
import com.lp.domain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
* 账户的持久层实现类
*/
@Repository("accountDao")
public class AccountDaoImpl implements IAccountDao {
@Autowired
private JdbcTemplate jdbcTemplate;
public Account findAccountById(Integer accountId) {
List<Account> accounts = jdbcTemplate.query("select * from account where id = ?",new BeanPropertyRowMapper<Account>(Account.class),accountId);
return accounts.isEmpty()?null:accounts.get(0);
}
public Account findAccountByName(String accountName) {
List<Account> accounts = jdbcTemplate.query("select * from account where name = ?",new BeanPropertyRowMapper<Account>(Account.class),accountName);
if(accounts.isEmpty()){
return null;
}
if(accounts.size()>1){
throw new RuntimeException("结果集不唯一");
}
return accounts.get(0);
}
public void updateAccount(Account account) {
jdbcTemplate.update("update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId());
}
public List<Account> findAll() {
List<Account> query = jdbcTemplate.query("select * from account", new BeanPropertyRowMapper<Account>(Account.class));
return query;
}
}
service层实现类
package com.lp.service.impl;
import com.lp.dao.IAccountDao;
import com.lp.domain.Account;
import com.lp.service.IAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
/**
* 账户的业务层实现类
* <p>
* 事务控制应该都是在业务层
*/
@Service("accountService")
@Transactional(readOnly = true, propagation = Propagation.SUPPORTS)
public class AccountServiceImpl implements IAccountService {
@Autowired
private IAccountDao accountDao;
public Account findAccountById(Integer accountId) {
return accountDao.findAccountById(accountId);
}
@Transactional(readOnly = false, propagation = Propagation.REQUIRED)
public void transfer(String sourceName, String targetName, Float money) {
System.out.println("transfer....");
//2.1根据名称查询转出账户
Account source = accountDao.findAccountByName(sourceName);
//2.2根据名称查询转入账户
Account target = accountDao.findAccountByName(targetName);
//2.3转出账户减钱
source.setMoney(source.getMoney() - money);
//2.4转入账户加钱
target.setMoney(target.getMoney() + money);
//2.5更新转出账户
accountDao.updateAccount(source);
int i = 1 / 0;
//2.6更新转入账户
accountDao.updateAccount(target);
System.out.println("success!!!");
}
public List<Account> findAll() {
return accountDao.findAll();
}
}
基于纯注解配置我们需要配置类
主配置类
package com.lp.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.PropertySource;
import org.springframework.transaction.annotation.EnableTransactionManagement;
/**
* @Date 2020/5/31 13:28
* @Author luopeng
*/
@Configuration
@ComponentScan("com.lp")
@Import(JdbcConfig.class)
//自动开启事务管理
@EnableTransactionManagement
@PropertySource("jdbcConfig.properties")
public class SpringConfig {
}
jdbc和DataSource的配置类
package com.lp.config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import javax.sql.DataSource;
/**
* @Date 2020/5/31 13:30
* @Author luopeng
*/
public class JdbcConfig {
@Value("${jdbc.driver}")
private String driver;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.username}")
private String username;
@Value("${jdbc.password}")
private String password;
// 创建JdbcTemplate,注入数据源
@Bean("jdbcTemplate")
public JdbcTemplate getJdbcTemplate(DataSource dataSource){
return new JdbcTemplate(dataSource);
}
// 创建数据源
@Bean("dataSource")
public DataSource getDataSource(){
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(driver);
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
return dataSource;
}
// 配置事务管理器
@Bean("dtManager")
public DataSourceTransactionManager getDatasourceTransactionManager(DataSource dataSource){
return new DataSourceTransactionManager(dataSource);
}
}
jdbc配置文件
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring?useUnicode=true&characterEncoding=utf-8&useSSL=false
jdbc.username=root
jdbc.password=962464
测试类
package com.lp.test;
import com.lp.config.SpringConfig;
import com.lp.domain.Account;
import com.lp.service.IAccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import java.util.List;
/**
* 使用Junit单元测试:测试我们的配置
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfig.class)
public class AccountServiceTest {
@Autowired
@Qualifier("accountService")
private IAccountService as;
@Test
public void testTransfer(){
as.transfer("aaa","ccc",100f);
}
@Test
public void testFindAll(){
List<Account> all = as.findAll();
for (Account account : all) {
System.out.println(account);
}}
}
dao接口和service接口代码不用贴出来了