Spring--事务管理
主要内容：
数据库表结构：
建表语句：
drop database if exists os;
create database os;
use os;
drop table if exists orders;
drop table if exists products;
/*==============================================================*/
/* Table: orders */
/*==============================================================*/
create table orders
(
id char(6) not null,
products_id char(6) not null,
number int,
price double,
create_time datetime,
send_time datetime,
confirm_time datetime,
consignee varchar(20),
consignee_phone char(11),
consignee_address varchar(100),
status varchar(10),
primary key (id)
);
/*==============================================================*/
/* Table: products */
/*==============================================================*/
create table products
(
id char(6) not null,
title varchar(20),
price double,
stock int,
status varchar(10),
primary key (id)
);
alter table orders add constraint FK_Reference_1 foreign key (products_id)
references products (id) on delete restrict on update restrict;
insert into products values('100001','小米8',2699,100,'正常');
insert into products values('100002','小米8SE',1799,100,'正常');
insert into products values('100003','小米MIX2S',3299,100,'正常');
insert into products values('100004','小米手环3',199,100,'正常');
事务概念：
事务的特性：
MySQL数据处理：
测试：rollback
测试：commit
MySQL事务管理--事务并发问题：脏读、不可重复读、幻读
脏读解决方法：使得事务只能访问永久性的数据
不可重复读解决方法：在事务A操作某个记录的时候，不允许别的事务操作该记录
幻读解决方法：在事务A操作表的时候，进行锁表操作。不允许别的事务对该表进行操作
事务隔离级别：
JDBC事务处理：
测试代码：
package com.imooc.os.dao;
import org.junit.Test;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
public class OrderTest {
private String driver = "com.mysql.jdbc.Driver";
private String url = "jdbc:mysql://localhost:3306/os?useUnicode=true&characterEncoding=utf8";
private String userName = "root";
private String password = "密码";
@Test
public void addOrder(){
try {
Class.forName(driver);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
Connection connection = null;
try {
connection = DriverManager.getConnection(url,userName,password);
//首先禁止自动封装提交
connection.setAutoCommit(false);
Statement statement = connection.createStatement();
statement.execute("insert into orders values('100001','100001',2,2499,now(),null,null,'刘备','1330000000','成都','待发货')");
statement.execute("update products set stock=stock-2 where id='100001'");
statement.close();
//手动提交
connection.commit();
} catch (SQLException e) {
e.printStackTrace();
try {
//有异常则进行回滚
connection.rollback();
} catch (SQLException e1) {
e1.printStackTrace();
}
}finally {
try {
connection.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
JDBC事务处理--事务隔离级别：
Spring事务管理：
TransationDefinition接口：
Spring事务传播行为：
准备工作：引入依赖包、实现持久层、业务层接口的声明
引入依赖包：
org.springframework
spring-core
5.1.5.RELEASE
org.springframework
spring-beans
5.1.5.RELEASE
org.springframework
spring-context
5.1.5.RELEASE
org.springframework
spring-aop
5.1.5.RELEASE
org.springframework
spring-jdbc
5.1.5.RELEASE
org.springframework
spring-tx
5.1.5.RELEASE
org.springframework
spring-test
5.1.5.RELEASE
org.aspectj
aspectjweaver
1.8.9
实现持久层并配置文件：
业务层接口的声明：
Spring事务处理--基于底层API：
OrderServiceImpl:
package com.imooc.os.service.impl1;
import com.imooc.os.dao.OrderDao;
import com.imooc.os.dao.ProductDao;
import com.imooc.os.entity.Order;
import com.imooc.os.entity.Product;
import com.imooc.os.service.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.interceptor.TransactionProxyFactoryBean;
import org.springframework.transaction.support.TransactionTemplate;
import java.util.Date;
@Service
public class OrderServiceImpl implements OrderService {
@Autowired
private OrderDao orderDao;
@Autowired
private ProductDao productDao;
@Autowired
private PlatformTransactionManager transactionManager;
@Autowired
private TransactionDefinition transactionDefinition;
public void addOrder(Order order) {
order.setCreateTime(new Date());
order.setStatus("待付款");
TransactionProxyFactoryBean transactionProxyFactoryBean;
TransactionStatus transactionStatus = transactionManager.getTransaction(transactionDefinition);
try {
orderDao.insert(order);
Product product = productDao.select(order.getProductsId());
product.setStock(product.getStock() - order.getNumber());
productDao.update(product);
transactionManager.commit(transactionStatus);
}catch (Exception e){
e.printStackTrace();
transactionManager.rollback(transactionStatus);
}
}
}
spring-service1.xml:
测试代码：
package com.imooc.os.service;
import com.imooc.os.entity.Order;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring-service1.xml")
public class OrderTest {
@Autowired
private OrderService orderService;
@Test
public void testAddOrder(){
Order order = new Order("100006","100002",2,1799,"","","");
orderService.addOrder(order);
}
}
输出结果：
Spring事务管理--基于TransactionTemplte:
package com.imooc.os.service.impl2;
import com.imooc.os.dao.OrderDao;
import com.imooc.os.dao.ProductDao;
import com.imooc.os.entity.Order;
import com.imooc.os.entity.Product;
import com.imooc.os.service.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionTemplate;
import java.util.Date;
@Service
public class OrderServiceImpl implements OrderService {
@Autowired
private OrderDao orderDao;
@Autowired
private ProductDao productDao;
@Autowired
private TransactionTemplate transactionTemplate;
public void addOrder(final Order order) {
order.setCreateTime(new Date());
order.setStatus("待付款");
transactionTemplate.execute(new TransactionCallback() {
public Object doInTransaction(TransactionStatus transactionStatus) {
try {
orderDao.insert(order);
Product product = productDao.select(order.getProductsId());
product.setStock(product.getStock() - order.getNumber());
productDao.update(product);
}catch (Exception e){
e.printStackTrace();
transactionStatus.setRollbackOnly();
}
return null;
}
});
}
}
spring-service2.xml:
测试结果：
package com.imooc.os.service;
import com.imooc.os.entity.Order;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring-service2.xml")
public class OrderTest {
@Autowired
private OrderService orderService;
@Test
public void testAddOrder(){
Order order = new Order("100007","100002",2,1799,"","","");
orderService.addOrder(order);
}
}
输出结果：
Spring事务管理--基于拦截器：
实现类：
package com.imooc.os.service.impl;
import com.imooc.os.dao.OrderDao;
import com.imooc.os.dao.ProductDao;
import com.imooc.os.entity.Order;
import com.imooc.os.entity.Product;
import com.imooc.os.service.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.interceptor.TransactionProxyFactoryBean;
import java.util.Date;
@Service
public class OrderServiceImpl implements OrderService {
@Autowired
private OrderDao orderDao;
@Autowired
private ProductDao productDao;
public void addOrder(Order order) {
order.setCreateTime(new Date());
order.setStatus("待付款");
orderDao.insert(order);
Product product = productDao.select(order.getProductsId());
product.setStock(product.getStock() - order.getNumber());
productDao.update(product);
}
}
配置代码：
PROPAGATION_REQUIRED,readOnly
PROPAGATION_REQUIRED,readOnly
PROPAGATION_REQUIRED,readOnly
PROPAGATION_REQUIRED
简化拦截器配置：
PROPAGATION_REQUIRED,readOnly
PROPAGATION_REQUIRED,readOnly
PROPAGATION_REQUIRED,readOnly
PROPAGATION_REQUIRED
Spring事务处理--基于tx命名空间：
配置文件：
Spring事务处理--基于注解：
实现类：
package com.imooc.os.service.impl6;
import com.imooc.os.dao.OrderDao;
import com.imooc.os.dao.ProductDao;
import com.imooc.os.entity.Order;
import com.imooc.os.entity.Product;
import com.imooc.os.service.OrderService;
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.Date;
@Service
public class OrderServiceImpl implements OrderService {
@Autowired
private OrderDao orderDao;
@Autowired
private ProductDao productDao;
@Transactional(propagation = Propagation.REQUIRED)
public void addOrder(Order order) {
order.setCreateTime(new Date());
order.setStatus("待付款");
orderDao.insert(order);
Product product = productDao.select(order.getProductsId());
product.setStock(product.getStock() - order.getNumber());
productDao.update(product);
}
}
配置文件：
总结：
