SpringMVC+Spring+Hibernate的小样例

2023-01-29 20:17:10

Strusts2+Spring+Hibernate尽管是主流的WEB开发框架，可是SpringMVC有越来越多的人使用了。确实也很好用。用得爽！

这里实现了一个SpringMVC+Spring+Hibernate的小样例。凝视都在代码里面。

项目各包的结构例如以下图：

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvcWlhbnR1amF2YQ==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="">

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依据springmvc-servlet中的配置找到全部的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。相应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，而且系统会到WEB-INF文件夹下找这个文件。

须要自己定义名称和文件夹的自己百度一下。

<?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">

	<!-- 自己主动扫面注解包 -->

	<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>

				<!-- 会自己主动创表，可是不会自己主动创建数据库，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

@Table

public 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

	@GeneratedValue

	public 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;

	}

	@Override

	public 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。

* 假设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。

	 */

	@Autowired

	private 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;

@Service

public class UserService implements IUserService {

	@Autowired

	private 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。

 */

@Repository

public class GeneralDao implements IGeneralDao {

	/**

	 * 这个bean里面须要注入sessionFactory，所以把这个bean写在了配置中。

	 */

	@Autowired

	private 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。測试。

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 {

	@Test

	public 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，在浏览器訪问http://localhost:8080/xx项目/user/registe。

码农公寓

相关文章