Struts+spring的例子2（源自北京尚学堂教程）

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2011-01-02

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spring+struts的集成(第二种集成方案)

原理：将业务逻辑对象通过spring注入到Action中，从而避免了在Action类中的直接代码查询

1、spring和struts依赖库配置

*配置struts

--拷贝struts类库和jstl类库

--修改web.xml文件来配置ActionServlet

--提供struts-config.xml文件

--提供国际化资源文件

*配置spring

--拷贝spring类库

--提供spring配置文件

2、因为Action需要调用业务逻辑方法，所以需要在Action中提供setter方法，让spring将业务逻辑对象注入过来

3、在struts-config.xml文件中配置Action

*<action>标签中的type属性需要修改为org.springframework.web.struts.DelegatingActionProxy

DelegatingActionProxy是一个Action，主要作用是取得BeanFactory，然后根据<action>中的path属性值

到IoC容器中取得本次请求对应的Action

4、在spring配置文件中需要定义struts的Action,如：

<beanname="/login"class="com.bjsxt.usermgr.actions.LoginAction"scope="prototype">

<propertyname="userManager"ref="userManager"/>

</bean>

*必须使用name属性，name属性值必须和struts-config.xml文件中<action>标签的path属性值一致

*必须注入业务逻辑对象

*建议将scope设置为prototype,这样就避免了strutsAction的线程安全问题

WEB-INF下

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
	xmlns="http://java.sun.com/xml/ns/j2ee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
	http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>2</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>2</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>


  <!-- Standard Action Servlet Mapping -->
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>  
 
 <!--  
  <context-param>
  	<param-name>contextConfigLocation</param-name>
  	<param-value>classpath*:applicationContext-*.xml,/WEB-INF/applicationContext-*.xml</param-value>
  </context-param>
 -->
   <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>
   
</web-app>

struts-config.xml

<?xml version="1.0" encoding="ISO-8859-1" ?>

<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">

<struts-config>
	<form-beans>
		<form-bean name="loginForm" type="com.bjsxt.usermgr.forms.LoginActionForm"/>
	</form-beans>
	
	<action-mappings>
		
		<action path="/logininput"
				forward="/login.jsp"
		></action>
	
		<action path="/login"
				type="org.springframework.web.struts.DelegatingActionProxy"
				name="loginForm"
				scope="request"	
		>
			<forward name="success" path="/success.jsp"/>
		</action>
	</action-mappings>

    <message-resources parameter="MessageResources" />
</struts-config>

WebContent或WebRoot下

index.jsp

<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>spring和struts的集成（第二种方案）</title>
</head>
<body>
	<h1>spring和struts的集成（第二种方案）</h1>
	<hr>
	<a href="logininput.do">登录</a>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>用户登录</title>
</head>
<body>
	<form action="login.do" method="post">
		用户：<input type="text" name="username"><br>
		密码：<input type="password" name="password"><br>
		<input type="submit" value="登录">
	</form>
</body>
</html>

success.jsp

<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
	${loginForm.username },用户登录成功！
</body>
</html>

src下

applicationContext-actions.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: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-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">
	<bean name="/login" class="com.bjsxt.usermgr.actions.LoginAction" scope="prototype">
		<property name="userManager" ref="userManager"/>
	</bean>
</beans>

applicationContext-beans.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: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-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">
	
	<bean id="userManager" class="com.bjsxt.usermgr.manager.UserManagerImpl"/>
</beans>

MessageResources.properties 与例子1同

src.com.bjsxt.usermgr.actions下LoginAction.java

package com.bjsxt.usermgr.actions;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import com.bjsxt.usermgr.forms.LoginActionForm;
import com.bjsxt.usermgr.manager.UserManager;

public class LoginAction extends Action {

	private UserManager userManager;
	
	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		LoginActionForm laf = (LoginActionForm)form;
		
		userManager.login(laf.getUsername(), laf.getPassword());
		
		return mapping.findForward("success");
	}

	public void setUserManager(UserManager userManager) {
		this.userManager = userManager;
	}
}

src.com.bjsxt.usermgr.forms下 LoginActionForm.java

package com.bjsxt.usermgr.forms;

import org.apache.struts.action.ActionForm;

public class LoginActionForm extends ActionForm {
	
	private String username;
	
	private String password;

	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;
	}
}

src.com.bjsxt.usermgr.manager 下

UserManager.java

package com.bjsxt.usermgr.manager;

public interface UserManager {

	public void login(String username, String password);
}

UserManagerImpl.java

package com.bjsxt.usermgr.manager;

public class UserManagerImpl implements UserManager {

	public void login(String username, String password) {
		System.out.println("UserManagerImpl.login() -- username=" + username);
	}
}

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