SpringMVC+Spring+Hibernate的小例子

Strusts2+Spring+Hibernate虽然是主流的WEB开发框架，但是SpringMVC有越来越多的人使用了，确实也非常好用，用得爽！

这里实现了一个SpringMVC+Spring+Hibernate的小例子。注释都在代码里面。

项目各包的结构如下图：

1， 首先是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/maven-v4_0_0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.miquan</groupId><artifactId>springmvc_spring_hibernate</artifactId><packaging>war</packaging><version>0.0.1-SNAPSHOT</version><name>springmvc_spring_hibernate Maven Webapp</name><url>http://maven.apache.org</url><dependencies><!-- expectj --><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>4.0.4.RELEASE</version></dependency><!-- junit --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><!-- spring --><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.1.0.RELEASE</version></dependency><dependency><groupId>org.springframework.ws</groupId><artifactId>spring-ws-core</artifactId><version>2.2.0.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-orm</artifactId><version>4.1.1.RELEASE</version></dependency><!-- hibernate --><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-core</artifactId><version>4.3.6.Final</version></dependency><!-- dbcp --><dependency><groupId>commons-dbcp</groupId><artifactId>commons-dbcp</artifactId><version>1.4</version></dependency><!-- MYSQL --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.18</version></dependency></dependencies><build><finalName>springmvc_spring_hibernate</finalName></build></project>

2， web.xml配置好SpringMVC和Spring

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"id="WebApp_ID" version="3.0"><!-- Spring配置。（必须配，要不会找不到bean） -->      <listener>          <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>      </listener><!-- spring mvc （系统在启动的时候会根据springmvc-servlet中的配置找到所有的controller并初始化）--><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/</url-pattern><!-- 这里不能加* --></servlet-mapping></web-app>

3， SpringMVC的配置——springmvc-servlet.xml（注意命名，对应servlet中的springmvc，命名规则： [<servlet-name>]-servlet.xml）

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:mvc="http://www.springframework.org/schema/mvc"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:p="http://www.springframework.org/schema/p"    xmlns:context="http://www.springframework.org/schema/context"    xsi:schemaLocation="        http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context.xsd        http://www.springframework.org/schema/mvc        http://www.springframework.org/schema/mvc/spring-mvc.xsd"        >            <!-- 存在controller的包。注意这里写的是包名，不是类名 -->    <context:component-scan base-package="com.miquan.controller"/><mvc:annotation-driven /><!-- 静态文件 --><mvc:resources location="/res/" mapping="/res/**"></mvc:resources><!-- 跳转文件的前后缀 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/view/"></property><property name="suffix" value=".jsp"></property></bean></beans>

4， spring的配置——applicationContext.xml默认是这个名字，并且系统会到WEB-INF目录下找这个文件。需要自定义名称和目录的自己百度一下。

<?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:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation=" http://www.springframework.org/schema/beans         http://www.springframework.org/schema/beans/spring-beans-3.0.xsd         http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context-3.0.xsd         http://www.springframework.org/schema/aop           http://www.springframework.org/schema/aop/spring-aop-3.0.xsd           http://www.springframework.org/schema/tx           http://www.springframework.org/schema/tx/spring-tx.xsd"><!-- 自动扫面注解包 --><context:annotation-config /><context:component-scan base-package="com.miquan.*" /><!-- 数据源 --><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"destroy-method="close"><property name="driverClassName" value="com.mysql.jdbc.Driver" /><property name="url" value="jdbc:mysql://127.0.0.1:3306/ssh" /><property name="username" value="root" /><property name="password" value="root" /></bean><!-- 配置sessionFactory --><bean id="sessionFactory"class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"><property name="dataSource" ref="dataSource" /><property name="packagesToScan" value="com.miquan.model" /><!-- 实体类的包 --><property name="hibernateProperties"><props><prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop><prop key="hibernate.show_sql">true</prop><!-- 会自动创表，但是不会自动创建数据库，所以要先手动创建数据库。 --><prop key="hibernate.hbm2ddl.auto">update</prop><prop key="hibernate.format_sql">true</prop></props></property></bean><!-- 用于注入到GeneralDao中 --><bean id="hibernateTemplate" class="org.springframework.orm.hibernate4.HibernateTemplate"><property name="sessionFactory" ref="sessionFactory" /></bean><!-- 配置事务管理 --><bean id="transactionManager"class="org.springframework.orm.hibernate4.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory" /></bean><!-- 开启事务管理注解 --><aop:aspectj-autoproxy /><tx:annotation-driven /></beans>

5， 实体类。

package com.miquan.model;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.Table;import java.io.Serializable;@Entity@Tablepublic class User impements Serializable {private int id;private String username;private String password;public User() {super();}public User(int id, String username, String password) {super();this.id = id;this.username = username;this.password = password;}@Id@GeneratedValuepublic int getId() {return id;}public void setId(int 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;}@Overridepublic String toString() {return "User [id=" + id + ", username=" + username + ", password="+ password + "]";}}

6， controller层。

package com.miquan.controller;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.RequestMethod;import com.miquan.model.User;import com.miquan.service.IUserService;@Controller@RequestMapping(value="/user")public class UserController {/** * 注入userService。 * 如果userService继承了某个接口， * 这里类型必须是接口IUserService， * 不能是类UserService，不知道为什么。 */@Autowiredprivate IUserService userService;@RequestMapping(value="/registe", method=RequestMethod.GET)public String registe() {User user = new User(0, "小马云", "999");userService.registe(user);return "index";}}

7， service层。

package com.miquan.service;import com.miquan.model.User;public interface IUserService {public boolean registe(User user);}

package com.miquan.service;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import com.miquan.dao.IGeneralDao;import com.miquan.model.User;@Servicepublic class UserService implements IUserService {@Autowiredprivate IGeneralDao generalDao;/*  * 这里要有事务注解，默认readOnly=true,不设置的话会报错。 * insert和update操作都要。 */@Transactional(readOnly=false)public boolean registe(User user) {generalDao.save(user);return false;}}

8， dao层。

package com.miquan.dao;import java.io.Serializable;import java.util.List;public interface IGeneralDao {public <T> T findById(Class<T> type, Serializable id);        public <T> List<T> findAll(Class<T> type);        public void save(Object... entities);        public void update(Object... entities);        public void saveOrUpdate(Object entity);        public void delete(Object... entities);        public void deleteById(Class<?> type, Serializable id);        public void refresh(Object... entities);        public void flush();}

package com.miquan.dao;import java.io.Serializable;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.orm.hibernate4.HibernateTemplate;import org.springframework.stereotype.Repository;/** * 这个类将dao成封装成了一个操作类，从网上复制过来的。 */@Repositorypublic class GeneralDao implements IGeneralDao {/** * 这个bean里面需要注入sessionFactory，所以把这个bean写在了配置中。 */@Autowiredprivate HibernateTemplate hibernateTemplate;public <T> T findById(Class<T> type, Serializable id) {return hibernateTemplate.get(type, id);}public <T> List<T> findAll(Class<T> type) {return hibernateTemplate.loadAll(type);}public void save(Object... entities) {for (Object entity : entities) {hibernateTemplate.save(entity);}}public void saveOrUpdate(Object entity) {hibernateTemplate.saveOrUpdate(entity);}public void update(Object... entities) {for (Object entity : entities) {hibernateTemplate.update(entity);}}public void delete(Object... entities) {for (Object entity : entities) {if (entity != null) {hibernateTemplate.delete(entity);}}}public void deleteById(Class<?> type, Serializable id) {if (id == null) {return;}Object entity = findById(type, id);if (entity == null) {return;}delete(entity);}public void refresh(Object... entities) {for (Object entity : entities) {hibernateTemplate.refresh(entity);}}public void flush() {hibernateTemplate.flush();}}

9， 测试。

package com.miquan.service;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.FileSystemXmlApplicationContext;import com.miquan.controller.UserController;public class UserServiceTest {@Testpublic void test() {ApplicationContext ctx = new FileSystemXmlApplicationContext("src/main/webapp/WEB-INF/applicationContext.xml");UserController controller = ctx.getBean(UserController.class);controller.registe();}}

或者部署在tomcat上，在浏览器访问http://localhost:8080/xx项目/user/registe。