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SSH框架整合demo

时间:2016-04-04 00:09:38      阅读:333      评论:0      收藏:0      [点我收藏+]

标签:

Struts、Spring、Hibernate整合

一、创建web工程,搭建Struts框架开发环境:

这里只导入了项目中所需要的重要的jar包,以后根据业务要求继续导入相关的包。
  1. 步骤1::导入struts框架所需的jar包
  2. 步骤2:在web.xml中配置struts2.0主过滤器
  3. 步骤3:导入struts.xml配置文件
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web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
	<!--  配置Struts2的主过滤器 -->
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>

	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
</web-app>
struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
	<!-- 配置为开发模式 -->
    <constant name="struts.devMode" value="true" />
    <!-- 配置扩展名为action -->
	<constant name="struts.action.extension" value="action"/>
    <package name="default" namespace="/" extends="struts-default">

    </package>
    
</struts>

二、搭建Hibernate开发环境:

创建数据库:
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这里只导入了项目中所需要的重要的jar包,以后根据业务要求继续导入相关的包。
工程目录:
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hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
	"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
	"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
	<session-factory>
		<!-- 配置Hibernate:属性配置参考  Hibernate发型包\project\etc\hibernate.properties -->
		<!-- JDBC的基本链接 -->
		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="connection.username">root</property>
		<property name="connection.password">root</property>
		<property name="connection.url">jdbc:mysql://localhost:3306/xbmuoa</property>
		<!-- 配置数据库方言 -->
		<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
		<!-- 根据映射产生表结构的类型:
			create-drop:木有表结构创建,下次启动时删除重新创建。适合学习阶段
			create:只做创建
			update:探测表结构够的变化,对于数据库没有的,进行更新操作。适合学习阶段
			validate:对比与数据库的结构
		 -->
		<property name="hibernate.hbm2ddl.auto">update</property>
		<!-- 显示sql语句及格式:开发调试阶段非常有用 -->
		<property name="hibernate.show_sql">true</property>
		<property name="hibernate.format_sql">true</property>
		
		<!-- 告知映射文件 -->
		
	</session-factory>
</hibernate-configuration>
Person.hbm.xml(暂时性先写个映射文件的模板)
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.xbmu.oa.domain">
	
</hibernate-mapping>

三、搭建Spring开发环境:

这里只导入了项目中所需要的重要的jar包,以后根据业务要求继续导入相关的包。
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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:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
				http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
				http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
	<!-- 自动扫描与装配bean -->
	<context:component-scan base-package="cn.xbmu.oa"></context:component-scan>



</beans>
以上已经将Struts、Spring、Hibernate开发所需要的jar包及其配置文件已经配置到web工程中了。
接下来,我们两两整合在一起。

四、Spring与Hibernate整合:

让Spring来管理SessionFactory和事务。
工程目录:
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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:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
				http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
				http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
	<!-- 自动扫描与装配bean -->
	<context:component-scan base-package="cn.xbmu.oa"></context:component-scan>

	<!-- 加载外部的properties配置文件 -->
	<context:property-placeholder location="classpath:jdbc.properties" />

	<!-- 配置数据库连接池(c3p0) -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<!-- 基本信息 -->
		<property name="jdbcUrl" value="${jdbcUrl}"></property>
		<property name="driverClass" value="${driverClass}"></property>
		<property name="user" value="${username}"></property>
		<property name="password" value="${password}"></property>
		<!-- 其他配置 -->
		<!--初始化时获取三个连接,取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
		<property name="initialPoolSize" value="3"></property>
		<!--连接池中保留的最小连接数。Default: 3 -->
		<property name="minPoolSize" value="3"></property>
		<!--连接池中保留的最大连接数。Default: 15 -->
		<property name="maxPoolSize" value="5"></property>
		<!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->
		<property name="acquireIncrement" value="3"></property>
		<!-- 控制数据源内加载的PreparedStatements数量。如果maxStatements与maxStatementsPerConnection均为0,则缓存被关闭。Default: 0 -->
		<property name="maxStatements" value="8"></property>
		<!-- maxStatementsPerConnection定义了连接池内单个连接所拥有的最大缓存statements数。Default: 0 -->
		<property name="maxStatementsPerConnection" value="5"></property>
		<!--最大空闲时间,1800秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 -->
		<property name="maxIdleTime" value="1800"></property>
	</bean>

	<!-- 配置SessionFactory -->
	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
	</bean>


	<!-- 配置声明式的事务管理(采用基于注解的方式) -->
	<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory"></property>
	</bean>
	<tx:annotation-driven transaction-manager="transactionManager" />

</beans>

jdbc.properties
jdbcUrl		= jdbc:mysql:///xbmuoa
driverClass	= com.mysql.jdbc.Driver
username	= root
password	= root
SpringTest.java
package cn.xbmu.oa.test;

import org.hibernate.SessionFactory;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringTest {
	private ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
	
	//测试SessionFactory
	@Test
	public void testSessionFactory(){
		SessionFactory sessionFactory = (SessionFactory) ac.getBean("sessionFactory");
		System.out.println(sessionFactory);
	}
}
使用Junit测试,结果:
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启动tomcat没有报错,说明以上环境的搭建都完全正确,并进行测试,也没有报错。
User.java
package cn.xbmu.oa.domain;

public class User {
	private Long id;
	private String name;
	public Long getId() {
		return id;
	}
	public void setId(Long id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
}
User.hbm.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.xbmu.oa.domain">
	<class name="User">
		<id name="id">
			<generator class="native"/>
		</id>
		<property name="name"/>
	</class>
</hibernate-mapping>
记得在hibernate.cfg.xml文件中引入映射文件。

TestService.java
package cn.xbmu.oa.test;

import javax.annotation.Resource;

import org.hibernate.SessionFactory;
import org.hibernate.classic.Session;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import cn.xbmu.oa.domain.User;
@Service("testService")
public class TestService {
	@Resource
	private SessionFactory sessionFactory;
	@Transactional
	public void saveTwoUser(){
		Session currentSession = sessionFactory.getCurrentSession();
		currentSession.save(new User());
		int i = 1 / 0;//这里会抛出异常
		currentSession.save(new User());
	}
}
SpringTest.java
package cn.xbmu.oa.test;

import org.hibernate.SessionFactory;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringTest {
	private ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
	
	//测试SessionFactory
	@Test
	public void testSessionFactory(){
		SessionFactory sessionFactory = (SessionFactory) ac.getBean("sessionFactory");
		System.out.println(sessionFactory);
	}
	//测试事务
	@Test
	public void testTransaction(){
		TestService testService = (TestService) ac.getBean("testService");
		testService.saveTwoUser();
	}
}
测试事务,报错,因为在 int i = 1 / 0这里发生了异常。
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查询数据库xbmuoa中的表,没有数据
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我们注释掉  int i = 1 / 0;这句代码,重新测试,成功。
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查询user表,里面已经有了保存的数据
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我们,继续打开抛异常的语句,再测试;再注释抛异常的代码,再测试。查看表中的数据,发现了事务回滚了。
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到此为止,我们顺利的将Spring与Hibernate整合在一起了。并测试了SessionFactory与事务,都正常。

五、Spring与Struts整合:

为了说明白,我们在整合之前写个Action,整合之后写个Action,看看他们之间的区别:

整合之前:

TestAction.java
package cn.xbmu.oa.test;

import com.opensymphony.xwork2.ActionSupport;

public class TestAction extends ActionSupport {
	@Override
	public String execute() throws Exception {
		System.out.println("---------->TestAction execute()");
		return "success";
	}
}
struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
	<!-- 配置为开发模式 -->
    <constant name="struts.devMode" value="true" />
    <!-- 配置扩展名为action -->
	<constant name="struts.action.extension" value="action"/>
    <package name="default" namespace="/" extends="struts-default">
    	<!-- 测试用的action -->
		<action name="test" class="cn.xbmu.oa.test.TestAction">
			<result name="success">/test.jsp</result>
		</action>
    </package>
    
</struts>
test.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>
  <body>
  	Struts2.0添加成功<br/>
  </body>
</html>
运行:
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整合之后:

导入jar包,已经完成了整合
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TestAction.java
package cn.xbmu.oa.test;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;

import com.opensymphony.xwork2.ActionSupport;
@Controller
@Scope("prototype")
public class TestAction extends ActionSupport {
	
	@Override
	public String execute() throws Exception {
		System.out.println("---------->TestAction execute()");
		return "success";
	}
}
struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
	<!-- 配置为开发模式 -->
    <constant name="struts.devMode" value="true" />
    <!-- 配置扩展名为action -->
	<constant name="struts.action.extension" value="action"/>
    <package name="default" namespace="/" extends="struts-default">
    	<!-- 测试用的action,当与Spring整合后,class属性写的就是bean的名称-->
		<action name="test" class="testAction">
			<result name="success">/test.jsp</result>
		</action>
    </package>
    
</struts>
在浏览器上运行:http://localhost:8080/xbmuoa/test.action
发现,在控制台上报错,信息如下:
严重: ********** FATAL ERROR STARTING UP STRUTS-SPRING INTEGRATION **********
Looks like the Spring listener was not configured for your web app! 
Nothing will work until WebApplicationContextUtils returns a valid ApplicationContext.
You might need to add the following to web.xml: 
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
四月 03, 2016 9:48:27 下午 com.opensymphony.xwork2.util.logging.commons.CommonsLogger error
严重: Dispatcher initialization failed
java.lang.NullPointerException
	at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:209)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyResultType(XmlConfigurationProvider.java:519)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addResultTypes(XmlConfigurationProvider.java:490)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:446)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:264)
	at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)
	at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:193)
	at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
	at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374)
	at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418)
	at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4854)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5542)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:649)
	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1245)
	at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1895)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:724)
四月 03, 2016 9:48:27 下午 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter struts2
Class: com.opensymphony.xwork2.spring.SpringObjectFactory
File: SpringObjectFactory.java
Method: getClassInstance
Line: 209 - com/opensymphony/xwork2/spring/SpringObjectFactory.java:209:-1
	at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:431)
	at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4854)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5542)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:649)
	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1245)
	at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1895)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:724)
Caused by: java.lang.NullPointerException
	at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:209)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyResultType(XmlConfigurationProvider.java:519)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addResultTypes(XmlConfigurationProvider.java:490)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:446)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:264)
	at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)
	at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:193)
	at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
	at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374)
	at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418)
	... 18 more
意思就是,没有和web工程整合,没有一个全局的工厂容器对象。
在web.xml中配置信息如下:
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
	<!-- 配置Spring的监听器,用于初始化ApplicationContext对象 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext*.xml</param-value>
	</context-param>
	<!--  配置Struts2的主过滤器 -->
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>

	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
</web-app>
TestAction.java
package cn.xbmu.oa.test;

import javax.annotation.Resource;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;

import com.opensymphony.xwork2.ActionSupport;
@Controller
@Scope("prototype")
public class TestAction extends ActionSupport {
	
	@Resource
	private TestService testService;
	@Override
	public String execute() throws Exception {
		System.out.println("---------->TestAction execute()");
		testService.saveTwoUser();
		return "success";
	}
}
在浏览器中运行,报错,是因为在 int i = 1 / 0出抛出了异常
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注释掉这句抛异常的语句,继续运行,成功。
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以上关于SSH的整合已经成功介绍完了,所需代码下载地址:http://download.csdn.net/detail/btt2013/9480447



SSH框架整合demo

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原文地址:http://blog.csdn.net/btt2013/article/details/51051660

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