spring-aop-fangneng（简单转账功能）
作者：互联网
文件目录：
准备好数据库：
在pom.xml中导入包：
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-expression -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jcl -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jcl</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.2.13.RELEASE</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-dbutils/commons-dbutils -->
<dependency>
<groupId>commons-dbutils</groupId>
<artifactId>commons-dbutils</artifactId>
<version>1.7</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.23</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.mchange/c3p0 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
</dependency>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.3</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.9.3</version>
</dependency>
</dependencies>
<!--配置代理的service-->
<bean id="transactionProxyAccountService" factory-bean="TransactionProxyUtils"
factory-method="getAccountService"/>
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.3</version>
</dependency>
配置核心文件ApplicationContext.xml：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util
https://www.springframework.org/schema/util/spring-util.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- bean definitions here -->
<context:component-scan base-package="dao"/>
<context:component-scan base-package="services"/>
<context:component-scan base-package="utils"/>
<context:component-scan base-package="transaction"/>
<!--配置QueryRunner-->
<bean id="queryRunner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype"/>
<!-- 配置数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!--连接数据库的必备信息-->
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/spring_aop"></property>
<property name="user" value="root"></property>
<property name="password" value="1003"></property>
</bean>
<!-- 注解 开启代理模式 -->
<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>
AccountDaoImpl文件：
@Repository("AccountDao")
public class AccountDaoImpl implements AccountDao {
// 数据库查询工具类
@Autowired
private QueryRunner runner;
// 数据库连接工具类
@Autowired
private ConnectionUtils connectionUtils;
/**
* 更新
*
* @param account
*/
public void updateAccount(Account account) {
try {
runner.update(connectionUtils.getThreadConnection(),
"update account set accountNum=?,money=? where id=?",
account.getAccountNum(), account.getMoney(), account.getId());
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
/**
* 根据编号查询账户
*
* @param accountNum
* @return 如果没有结果就返回null，如果结果集超过一个就抛异常，如果有唯一的一个结果就返回
*/
public Account findAccountByNum(String accountNum) {
List<Account> accounts = null;
try {
accounts = runner.query(connectionUtils.getThreadConnection(),
"select * from account where accountNum = ? ",
new BeanListHandler<Account>(Account.class),
accountNum);
} catch (SQLException e) {
throw new RuntimeException(e);
}
if (accounts == null || accounts.size() == 0) {
// 如果没有结果就返回null
return null;
} else if (accounts.size() > 1) {
// 如果结果集超过一个就抛异常
throw new RuntimeException("结果集不唯一，数据有问题");
} else {
// 如果有唯一的一个结果就返回
return accounts.get(0);
}
}
}
AccountDao文件：
public interface AccountDao {
void updateAccount(Account account);
Account findAccountByNum(String accountNum);
}
Account文件：
public class Account {
private Integer id;
private String accountNum;
private Integer money;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getAccountNum() {
return accountNum;
}
public void setAccountNum(String accountNum) {
this.accountNum = accountNum;
}
public Integer getMoney() {
return money;
}
public void setMoney(Integer money) {
this.money = money;
}
}
AccountServiceImpl文件：
@Service
public class AccountServiceImpl implements AccountService {
@Autowired
private AccountDao accountDao;
/**
* 转账
*
* @param sourceAccount 转出账户
* @param targetAccount 转入账户
* @param money 转账金额
*/
public void transfer(String sourceAccount, String targetAccount, Integer money) {
// 查询原始账户
Account source = accountDao.findAccountByNum(sourceAccount);
// 查询目标账户
Account target = accountDao.findAccountByNum(targetAccount);
// 原始账号减钱
source.setMoney(source.getMoney() - money);
// 目标账号加钱
target.setMoney(target.getMoney() + money);
// 更新原始账号
accountDao.updateAccount(source);
//增加异常
// int a= 1/0;
// 更新目标账号
accountDao.updateAccount(target);
System.out.println("转账完毕");
}
}
AccountService文件：
public interface AccountService {
/**
* 转账
*
* @param sourceAccount 转出账户
* @param targetAccount 转入账户
* @param money 转账金额
*/
void transfer(String sourceAccount, String targetAccount, Integer money);
}
TransactionManager文件：
public class TransactionManager {
// 数据库连接工具类
@Autowired
private ConnectionUtils connectionUtils;
/**
* 开启事务
*/
@Before("transactionPointcut()")
public void beginTransaction() {
try {
System.out.println("开启事务");
connectionUtils.getThreadConnection().setAutoCommit(false);
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
* 提交事务
*/
@AfterReturning("transactionPointcut()")
public void commit() {
try {
System.out.println("提交事务");
connectionUtils.getThreadConnection().commit();
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
* 取消事务
*/
@AfterThrowing("transactionPointcut()")
public void rollback() {
try {
System.out.println("取消事务");
connectionUtils.getThreadConnection().rollback();
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
* 释放连接
*/
@After("transactionPointcut()")
public void release() {
try {
System.out.println("释放连接");
connectionUtils.getThreadConnection().close();
} catch (SQLException e) {
e.printStackTrace();
}
connectionUtils.removeConnection();
}
}
TransactionProxyUtils文件：
public class TransactionProxyUtils {
//被代理的业务类接口
@Autowired
private AccountService accountService;
//提供事务管理的工具类
@Autowired
private TransactionManager transactionManager;
/**
* 获取AccountService代理对象
*
* @return
*/
public AccountService getAccountService() {
return (AccountService) Proxy.newProxyInstance(
accountService.getClass().getClassLoader(),
accountService.getClass().getInterfaces(),
new InvocationHandler() {
/**
* 添加事务的支持
*
* @param proxy 被代理的对象实例本身
* @param method 被代理对象正在执行的方法对象
* @param args 正在访问的方法参数对象
* @return
* @throws Throwable
*/
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
//
Object rtValue = null;
try {
// 执行操作前开启事务
transactionManager.beginTransaction();
// 执行操作
rtValue = method.invoke(accountService, args);
// 执行操作后提交事务
transactionManager.commit();
// 返回结果
return rtValue;
} catch (Exception e) {
// 捕捉到异常执行取消操作
transactionManager.rollback();
throw new RuntimeException(e);
} finally {
// 最终释放连接
transactionManager.release();
}
}
});
}
}
ConnectionUtils文件：
//链接数据库
@Component
public class ConnectionUtils {
private ThreadLocal<Connection> tl = new ThreadLocal<Connection>();
@Autowired
private ComboPooledDataSource dataSource;
/**
* 获得当前线程绑定的连接
*
* @return
*/
public Connection getThreadConnection() {
try {
// 看线程是否绑了连接
Connection conn = tl.get();
if (conn == null) {
// 从数据源获取一个连接
conn = dataSource.getConnection();
// 和线程局部变量 绑定
tl.set(conn);
}
// 返回线程连接
return tl.get();
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
/**
* 把连接和当前线程进行解绑
*/
public void removeConnection() {
tl.remove();
}
}
AccountTest文件：
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:ApplicationContext.xml")
public class AccountTest {
@Autowired
private AccountService accountService;
@Test
public void testTransfer() {
String sourceAccount = "622200001";
String targetAccount = "622200002";
Integer money = 100;
accountService.transfer(sourceAccount, targetAccount, money);
}
}
测试结果：
标签：fangneng,money,spring,void,springframework,aop,org,public 来源： https://www.cnblogs.com/pangfeng/p/14660478.html