原文地址：https://blog.csdn.net/jiegegeaa1/article/details/81975286
一、工作环境
编辑器用的是MyEclipse，用Mysql数据库，maven管理jar包。
二、搭建环境
（1）完整工程图：
（2）pom.xml：
<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> <groupId>ssh</groupId> <artifactId>ssh</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <name>ssh</name> <description/> <properties> <!-- Version --> <webVersion>3.0</webVersion> <springVersion>4.3.7.RELEASE</springVersion> <hibernateVersion>4.3.5.Final</hibernateVersion> <jsonVersion>1.9.13</jsonVersion> <jacksonVersion>2.5.0</jacksonVersion> <mysqlVersion>5.1.38</mysqlVersion> <c3p0Version>0.9.1.2</c3p0Version> <log4jVersion>1.2.17</log4jVersion> <fileuploadVersion>1.3.1</fileuploadVersion> <lombokVersion>1.16.10</lombokVersion> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>org.glassfish</groupId> <artifactId>bean-validator</artifactId> <version>3.0-JBoss-4.0.2</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.enterprise.deploy</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.jms</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.management.j2ee</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.eclipse.persistence</groupId> <artifactId>javax.persistence</artifactId> <version>2.0.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.resource</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.security.auth.message</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.security.jacc</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.servlet</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.servlet.jsp</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.servlet.jsp.jstl</artifactId> <version>3.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.xml.bind</groupId> <artifactId>jaxb-api-osgi</artifactId> <version>2.2.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.ws.rs</groupId> <artifactId>jsr311-api</artifactId> <version>1.1.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish.web</groupId> <artifactId>jstl-impl</artifactId> <version>1.2</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.mail</groupId> <artifactId>mail</artifactId> <version>1.4.3</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.xml</groupId> <artifactId>webservices-api-osgi</artifactId> <version>2.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.jboss.weld</groupId> <artifactId>weld-osgi-bundle</artifactId> <version>1.0.1-SP3</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish.web</groupId> <artifactId>javax.servlet.jsp.jstl</artifactId> <version>1.2.1</version> </dependency> <!-- spring --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${springVersion}</version> </dependency> <!-- spring web + spring mvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${springVersion}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${springVersion}</version> </dependency> <!-- hibernate --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>${hibernateVersion}</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-ehcache</artifactId> <version>${hibernateVersion}</version> </dependency> <!-- Database --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysqlVersion}</version> </dependency> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>${c3p0Version}</version> </dependency> <!-- json数据 使springMVC可以返回json值 --> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>${jsonVersion}</version> </dependency> <!-- Jackson可以轻松的将Java对象转换成json对象和xml文档,同样也可以将json、xml转换成Java对象 --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>${jacksonVersion}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>${jacksonVersion}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jacksonVersion}</version> </dependency> <!-- log4j --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4jVersion}</version> </dependency> <!-- 文件上传 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>${fileuploadVersion}</version> </dependency> <!-- lombok插件导包 @Data的使用：自动生成实体的getter/setter/toString --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>${lombokVersion}</version> <scope>provided</scope> </dependency> </dependencies> <build> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>2.6</version> <configuration> <failOnMissingWebXml>false</failOnMissingWebXml> </configuration> </plugin> </plugins> </build> </project>
（3）先配置Springmvc：spring-mvc.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:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:task="http://www.springframework.org/schema/task" xmlns:cache="http://www.springframework.org/schema/cache" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd"> <!-- mvc注解 --> <mvc:annotation-driven/> <!-- 扫描 --> <context:component-scan base-package="cn.austin" use-default-filters="false"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 视图解析 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/"></property> <property name="suffix" value=".jsp"></property> </bean> <!-- 解析静态资源 --> <mvc:default-servlet-handler/> </beans>
然后在web.xml中加载springmvc配置：
<!-- spring mvc start -->
<servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring-mvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- spring mvc end -->
然后写Controller：UserController.java
package cn.austin.controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.SessionAttributes; import com.fasterxml.jackson.annotation.JsonIgnoreProperties; import cn.austin.entity.User; import cn.austin.service.UserService; @Controller public class UserController { @RequestMapping("/index") public String index() { return "index"; } }
这里返回了index，再结合spring-mvc.xml中的视图解析器，加上前缀后缀之后就变成了/WEB-INF/index.jsp
到这里，Springmvc配置完毕，来验证一下：
Springmvc配置成功！
（4）将Spring和Springmvc整合起来：
下面是Spring的配置文件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:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd"> <!-- 扫描注解，注册bean --> <context:component-scan base-package="cn.austin"> <!-- 跳过@Controller --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> </beans>
细心的可以发现Spring和Springmvc的配置文件都会有<context:component-scan base-package="">这么一项。两个配置文件都扫描注解，会不会发生冲突呢？答案是会的。但我这里的配置可以很好地避免冲突。因为Spring的配置文件会跳过@Controller注解；而Springmvc的配置文件只会扫描@Controller。值得注意的是：Springmvc配置中的use-default-filters="false"是必须要有的！如果不写上，它的默认值是true，而这个default-filters会默认扫描@Service、@Repository等注解，这样就会和Spring的配置发生冲突！
在web.xml中加载Spring配置和相关过滤器：
<!-- 乱码的处理 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- spring start -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- spring end -->
到这里，Spring和Springmvc整合完毕，现在新建Service层来测试：
UserService.java：
import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import cn.austin.dao.impl.UserRepositoryImpl; import cn.austin.entity.User; @Service public class UserService { public void show() { System.out.println("show service"); } }
UserController.java：
import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.SessionAttributes; import com.fasterxml.jackson.annotation.JsonIgnoreProperties; import cn.austin.entity.User; @Controller public class UserController { @Autowired private UserService userService; @RequestMapping("/index") public String index() { this.userService.show(); return "index"; } }
再次访问http://127.0.0.1:8080/ssh/index，不仅可以成功访问主页，还可以在控制台上看到输出：show service。这说明了Spring和Springmvc整合成功！
（5）下面是最后，也是最困难的一步，将Hibernate也整合进去（困难是因为还会涉及到事务，将Hibernate事务交给Spring来管理）：
先配置好数据库设置：config.properties
#database connection config jdbc.driver = com.mysql.jdbc.Driver jdbc.url = jdbc:mysql://127.0.0.1:3306/struts?useUnicode=true&characterEncoding=utf-8 jdbc.username = root jdbc.password = 123 #hibernate config hibernate.dialect = org.hibernate.dialect.MySQLDialect hibernate.show_sql = true hibernate.format_sql = true hibernate.hbm2ddl.auto =update
使用时改成自己的数据库就可以。
来看Hibernate的相关配置。因为Hibernate的工厂以及事务都是交给Spring来管理的，因此将它们配置在一块，都配置在applicationContext.xml中，下面是完整的配置：
<?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:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd"> <!-- 扫描注解，注册bean --> <context:component-scan base-package="cn.austin"> <!-- 跳过@Controller --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- hibernate --> <!-- 扫描properties配置文件 --> <context:property-placeholder location="classpath:config.properties"/> <!-- 配置c3p0数据源 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <property name="driverClass" value="${jdbc.driver}"></property> <property name="jdbcUrl" value="${jdbc.url}"></property> <property name="user" value="${jdbc.username}"></property> <property name="password" value="${jdbc.password}"></property> <property name="maxPoolSize" value="40"></property> <!-- 最大连接数 --> <property name="minPoolSize" value="1"></property> <!-- 最小连接数 --> <property name="initialPoolSize" value="10"></property> <!-- 初始化连接池内的数据库连接 --> <property name="maxIdleTime" value="20"></property> <!-- 最大空闲时间 --> </bean> <!-- session工厂 --> <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="packagesToScan" value="cn.austin.entity"></property> <property name="hibernateProperties"> <props> <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop> <prop key="hibernate.dialect">${hibernate.dialect}</prop> <prop key="hibernate.show_sql">${hibernate.show_sql}</prop> <prop key="hibernate.format_sql">${hibernate.format_sql}</prop> </props> </property> </bean> <!-- 事务管理器 --> <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <!-- 开启事务注解 --> <tx:annotation-driven transaction-manager="transactionManager"/> </beans>
下面来看数据库访问层（Dao）的写法：
这里先定义了一个最通用的接口DomainRepository，可供任意的实体Dao使用：
DomainRepository.java：
package cn.austin.dao; import java.io.Serializable; import java.util.List; /* * 通用数据访问接口 */ public interface DomainRepository<T,PK extends Serializable> { T load(PK id); T get(PK id); List<T> findAll(); void persist(T entity); void add(T entity); void update(T entity); void delete(PK id); void flush(); }
UserRepository.java继承于这个接口，它是专门操作User数据库的：
package cn.austin.dao; import org.springframework.stereotype.Repository; import cn.austin.entity.User; public interface UserRepository extends DomainRepository<User, Integer> { }
该接口的具体实现类如下：UserRepositoryImpl.java
package cn.austin.dao.impl; import java.util.List; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Repository; import cn.austin.dao.UserRepository; import cn.austin.entity.User; @Repository public class UserRepositoryImpl implements UserRepository { @Autowired private SessionFactory sessionFactory; private Session getSession() { return this.sessionFactory.getCurrentSession(); } @Override public User load(Integer id) { return (User) this.getSession().load(User.class, id); } @Override public User get(Integer id) { // get by Id return (User) this.getSession().get(User.class, id); } @Override public List<User> findAll() { return this.getSession().createQuery("from User").list(); } @Override public void persist(User entity) { this.getSession().persist(entity); } @Override public void add(User entity) { this.getSession().save(entity); } @Override public void update(User entity) { this.getSession().update(entity); } @Override public void delete(Integer id) { User user = this.get(id); try{ this.getSession().delete(user); }catch(Exception e){ e.printStackTrace(); } } @Override public void flush() { this.getSession().flush(); } }
注意：这里十分重要的一点是，获取Session一定是要通过getCurrentSession()方法来获得！如果你用的是openSession()来获得，那么会造成的问题是事务的连接和操作数据库的连接(session)是不相干的，从而导致事务无法提交等等，导致update和save操作无法完成！
下面来看看Entity：
User.java：
package cn.austin.entity; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; import com.fasterxml.jackson.annotation.JsonIgnoreProperties; @Entity @Table(name="ssh_user") public class User { @Id @Column(name="id") @GeneratedValue(strategy=GenerationType.IDENTITY) private Integer id; @Column(name="username") private String username; @Column(name="password") private String password; @Column(name="description") private String description; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getDesc() { return description; } public void setDesc(String description) { this.description = description; } @Override public String toString() { return "User [id=" + id + ", username=" + username + ", password=" + password + ", description=" + description + "]"; } }
记得一定要建好数据表！
我也在实体这里被坑了一把。。。刚开始我的description写的是desc，结果执行增加操作的时候莫名地报错了：
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'desc, password, username) values ('c', 'b', 'a')' at line 1
后来排错的时候才发现，原来desc是Mysql的关键字，不能这么用，改成description就成功了。
下面来看完整的UserService.java：
package cn.austin.service; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import cn.austin.dao.impl.UserRepositoryImpl; import cn.austin.entity.User; @Transactional @Service public class UserService { @Autowired private UserRepositoryImpl userRepositoryImpl; public User getById(Integer id) { return this.userRepositoryImpl.get(id); } public List<User> findAll() { return this.userRepositoryImpl.findAll(); } public void add(User user) { this.userRepositoryImpl.add(user); } public void update(User user) { this.userRepositoryImpl.update(user); } public void delete(Integer id) { this.userRepositoryImpl.delete(id); } }
UserService.java类上面一定要加一个@Transactional注解，否则会报错。
那么问题来了，什么是事务管理呢？
事务管理是为了避免程序在执行过程中出现了异常，从而导致数据库的数据与实际的不一样。因此，如果某段程序中出现了异常，整个事务就会回滚，而不会提交，这样一来安全上得到了保证。
下面会对事务进行简单地验证。
（6）配置好数据访问层后，现在先来测试基本的增删查改功能：
我的数据库是这样的：
UserController.java：
package cn.austin.controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.SessionAttributes; import com.fasterxml.jackson.annotation.JsonIgnoreProperties; import cn.austin.entity.User; import cn.austin.service.UserService; @SessionAttributes(value="username") @Controller public class UserController { @Autowired private UserService userService; @RequestMapping("/index") public String index() { /* * 新增 */ User user = new User(); user.setUsername("abc"); user.setPassword("abc"); user.setDesc("abc"); this.userService.add(user); /* * 删除 */ this.userService.delete(8); /* *修改 */ User user1 = new User(); user1.setId(9); user1.setUsername("999"); user1.setPassword("999"); user1.setDesc("999"); this.userService.update(user1); /* * 查询 */ List<User> users = this.userService.findAll(); for(User us : users) System.out.println(us); return "index"; } }
再来访问http://127.0.0.1:8080/ssh/index：
数据库变成了这样：
看看MyEclipse的控制台：
这是查询出来的结果。都是我想要的结果，说明了Sping + Springmvc +Hibernate整合成功，事务配置成功！
（7）最后来简单地测试一下事务：
这里用修改功能来测试：
UserController.java：
package cn.austin.controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.SessionAttributes; import com.fasterxml.jackson.annotation.JsonIgnoreProperties; import cn.austin.entity.User; import cn.austin.service.UserService; @SessionAttributes(value="username") @Controller public class UserController { @Autowired private UserService userService; @RequestMapping("/index") public String index() { /* *修改 */ User user1 = new User(); user1.setId(9); user1.setUsername("9988"); user1.setPassword("9988"); user1.setDesc("9988"); this.userService.update(user1); return "index"; } }
UserRepositoryImpl.java中的update方法：
@Override public void update(User entity) { this.getSession().update(entity); int a = 1/0; }
这里写了一个异常，再次运行http://127.0.0.1:8080/ssh/index：
马上就报错了：java.lang.ArithmeticException: / by zero
而且这时候，数据库是没有数据更新的。这就简单地验证了事务的回滚功能：只有程序全部能正常执行，事务才会提交；否则，只要有一个错误的地方，事务就会回滚。
最后，祝大家整合成功，没有任何BUG！！