Struts整合spring方法（二）

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用Spring的DelegatingRequestProcessor类来代替struts中的RequestProcessor类，从而把struts中的action与Spring分离。并把struts的动作置于Spring框架的控制下。

1。新建一个登陆页面：loginDelegatingRequestProcessor.jsp

<%@pagecontentType="text/html;charset=GBK"isELIgnored="false"%>

<html>

<head><title>实现用户登录的Struts实例</title></head>

<body>

<fontsize=’22’>${msg}<br></font>

<formname="form1"action="/myLogin2/loginDelegatingRequestProcessor.do"method="post">

用户名：<inputtype="text"name="username"value="${user.username}"/><br>

密码：<inputtype="password"name="password"value="${user.password}"/><br>

<inputtype="submit"name=”method”value="提交"/>

</form>

</body>

</html>

2。创建一个存储登陆用户信息的类：User.java该类继承于ActionForm，代码如下：

package com.zhaosoft.bean;

import org.apache.struts.action.ActionForm;

publicclass Userextends ActionForm {

private Stringusername=null;

private Stringpassword=null;

public String getUsername() {

returnusername;

}

publicvoid setUsername(String username) {

this.username = username;

}

public String getPassword() {

returnpassword;

}

publicvoid setPassword(String password) {

this.password = password;

}

3。在 Com.zhaosoft.action中新建一个LoginDelegationRequestProcessor.java，该类继承于struts的Action，代码示例如下：

package com.zhaosoft.action;

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.zhaosoft.bean.User;

import com.zhaosoft.domain.Login;

public class LoginDelegationRequestProcessor extends Action {

private Login login;

public Login getLogin() {

return login;

}

public void setLogin(Login login) {

this.login = login;

}

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response)

throws Exception {

String forwardJsp = "login";

getLogin().login((User) form);

request.setAttribute("msg", login.getMsg());

request.setAttribute("user", (User) form);

return mapping.findForward("login");

}

4。新建包：com.zhaosoft.domain和com.zhaosoft.domain.impl在包com.zhaosoft.domain中新建一个接口：Login.java用来定义登陆的逻辑处理，示例代码如下：

package com.zhaosoft.domain;

import com.zhaosoft.bean.User;

publicinterface Login {

publicabstractvoid login(User user);

publicabstract String getMsg();

}

5．在包com.zhaosoft.domain.impl中建立LoginImpl.java用来实现登陆的逻辑处理

package com.zhaosoft.domain.impl;

import com.zhaosoft.bean.User;

import com.zhaosoft.domain.Login;

publicclass LoginImplimplements Login {

private Stringmsg;

public String getMsg() {

returnthis.msg;

}

publicvoid login(User user) {

String username = user.getUsername();

String password = user.getPassword();

if (username ==null && password ==null) {

msg ="请输入用户名和密码";

}elseif ("".equals(username) || "".equals(password)) {

msg ="请输入用户名和密码";

}elseif ("zhaosoft".equals(username) && "zhaosoft".equals(password)) {

msg ="登陆成功";

}elseif (!"zhaosoft".equals(username)) {

msg ="用户名填写错误";

}

6.修改struts的配置文件struts-config.xml，注册ContextLoaderPlugIn插件，实例代码如下：

<?xmlversion="1.0"encoding="UTF-8"?>

<!DOCTYPEstruts-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-beanname="user"type="com.zhaosoft.bean.User"></form-bean>

</form-beans>

<action-mappings>

<actionpath="/loginDelegatingRequestProcessor"

type="com.zhaosoft.action.LoginDelegationRequestProcessor"

name="user">

<forwardname="login"

path="/jsp/loginDelegatingRequestProcessor.jsp">

</forward>

</action>

<actionpath="/loginDelegatingRequestProcessorTemp"

type="org.apache.struts.actions.ForwardAction"

parameter="/jsp/loginDelegatingRequestProcessor.jsp">

</action>

</action-mappings>

<controller

processorClass="org.springframework.web.struts.DelegatingRequestProcessor">

</controller>

<plug-in

className="org.springframework.web.struts.ContextLoaderPlugIn">

<set-propertyproperty="contextConfigLocation"

value="/WEB-INF/spring-config.xml"/>

</plug-in>

</struts-config>

7．编写Spring的配置文件spring-config.xml。放在WEB-INF目录中，代码如下：

<?xmlversion="1.0"encoding="UTF-8"?>

<!DOCTYPEbeans PUBLIC"-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

<beanid="login"class="com.zhaosoft.domain.impl.LoginImpl">

</bean>

<beanname="/loginDelegatingRequestProcessor"class="com.zhaosoft.action.LoginDelegationRequestProcessor">