解析请求参数调用Action中的方法的struts1.x完整实例

77 阅读 0 评论 51 点赞

我是靠谱客的博主畅快毛巾，最近开发中收集的这篇文章主要介绍解析请求参数调用Action中的方法的struts1.x完整实例，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

1、简介

通过扩展DispatchAction类，并复写其中的execute方法，来通过解析请求地址中的Method=?参数来调用相应Action中的方法，从而很好地实现了控制器的请求转发跳转。其中利用到了反射技术实现执行方法。下面以登陆为例。

2、在新建的web工程中添加以下struts1.x jar包

antlr-2.7.6.jar、commons-beanutils.jar、commons-digester.jar、commons-fileupload.jar、commons-logging-1.0.4.jar、commons-validator.jar、jakarta-oro.jar、struts.jar。

3、web.xml进行如下配置

<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>MyStruts1Prj</display-name>
<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/conf/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>3</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>3</param-value>
</init-param>
<load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

4、新建登陆页面login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<%
String basePath = request.getContextPath();
%>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登陆页面</title>
</head>
<body>
<h1>登陆页面</h1>
<hr>
<form action="<%=basePath %>/login.do?method=login" method="post" >
userName:<input id="userName" name="userName" type="text" /><br>
passWord:<input id="passWord" name="passWord" type="password" /><br>
<input type="submit" id="submit" name="submit" value="submit" />
</form>
</body>
</html>

5、新建登陆成功后的跳转页面loginSucces.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>登陆成功页面</title>
</head>
<body>
<h1>欢迎[<%=request.getAttribute("userName") %>]登陆成功！</h1>
</body>
</html>

6、新建登陆失败后的跳转页面loginError.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>登陆失败页面</title>
</head>
<body>
<h1>登陆失败！</h1>
</body>
</html>

7、新建LoginActionForm.java

package com.lanp.webapp.form;
import org.apache.struts.action.ActionForm;
/**
* 封装登陆表单数据的FORM类
* @author LanP
* @since 2012年4月11日23:07:09
* @version v1.0
*/
@SuppressWarnings("serial")
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;
}
}

8、扩展了DispatchAction类的BaseAction.java

package com.lanp.webapp.utils;
import java.lang.reflect.Method;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
/**
* 经过自己封装后的Action，可以根据请求参数来调用相应的Action方法
* @author LanP
* @since 2012-4-12 21:41:14
* @version v1.0
*/
public class BaseAction extends DispatchAction {
@SuppressWarnings("rawtypes")
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
String actionMethod = request.getParameter("method");
if(null != actionMethod && actionMethod.length() > 0) {
Class[] clazzs = new Class[4];
clazzs[0] = ActionMapping.class;
clazzs[1] = ActionForm.class;
clazzs[2] = HttpServletRequest.class;
clazzs[3] = HttpServletResponse.class;
Object[] parameters = new Object[4];
parameters[0] = mapping;
parameters[1] = form;
parameters[2] = request;
parameters[3] = response;
Method method = getClass().getMethod(actionMethod, clazzs);
ActionForward actionForward = (ActionForward)method.invoke(this, parameters);
return actionForward;
} else {
System.out.println(">>> 请求地址中没有method=?参数 <<<");
}
return null;
}
}

9、新建LoginAction.java

package com.lanp.webapp.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.lanp.webapp.form.LoginActionForm;
import com.lanp.webapp.utils.BaseAction;
/**
* 处理登陆的Action类
* @author LanP
* @since 2012年4月11日23:07:09
* @version v1.0
*/
public class LoginAction extends BaseAction {
public ActionForward login(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
System.out.println(">>> 执行登陆的login方法 <<<");
String path = "error";
LoginActionForm loginActionForm = (LoginActionForm)form;
String userName = loginActionForm.getUserName();
String passWord = loginActionForm.getPassWord();
if(null != userName && "admin".equals(userName) && null != passWord && "admin".equals(passWord)) {
path = "success";
request.setAttribute("userName", userName);
} else {
path = "error";
}
return mapping.findForward(path);
}
}

10、配置struts-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
<form-beans>
<form-bean name="loginActionForm" type="com.lanp.webapp.form.LoginActionForm">
</form-bean>
</form-beans>
<action-mappings>
<action path="/login"
type="com.lanp.webapp.action.LoginAction"
name="loginActionForm"
scope="request">
<forward name="success" path="/jsp/loginSucces.jsp" />
<forward name="error" path="/jsp/loginError.jsp" />
</action>
</action-mappings>
</struts-config>

OK,TKS!