1在struts中要学会使用xxx.properties配置文件，配置文件在struts-config.xml中的
<message-resources parameter=”applicationresource”/>中定义。配置文件必须在src根目录下并且文件的扩展名是.properties。在action的子类中经常需要修改配置文件中的配置信息。
2LookupDispatchAction主要用来处理多个同名提交按钮的表单之中，类中可以定义多种业务方法，每种方法都是由配置文件中指定的一个特殊请求参数的值来决定的，提交按钮不一定要使用struts的html标签实现，可以使用标准的html的表单元素创建提交按钮
使用该类时必须重写getKeyMethodMap()方法完成按钮与action中方法的关联
在配置文件中必须再次确认按钮与action中方法的再次关联
submit.add=add
submit.delete=delete
action中的方法定义：
package com.inspur.controller;
import java.util.HashMap;
import java.util.Map;
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.LookupDispatchAction;
public class UserAction extends LookupDispatchAction {
@Override
protected Map getKeyMethodMap() {
// TODO Auto-generated method stub
Map<String,String> map=new HashMap<String,String>();
map.put("submit.add", "add");
map.put("submit.delete", "delete");
return map;
}
public ActionForward add(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
// TODO Auto-generated method stub
System.out.println("==add==");
return mapping.findForward("success");
}
public ActionForward delete(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
// TODO Auto-generated method stub
System.out.println("==delete==");
return mapping.findForward("deleteSuccess");
}
}
Struts-config.xml文件的写法：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>
<data-sources />
<form-beans >
<form-bean name="userForm" type="com.inspur.view.UserForm"></form-bean>
</form-beans>
<global-exceptions />
<global-forwards />
<action-mappings >
<action path="/test" name="userForm" type="com.inspur.controller.UserAction" parameter="method" scope="request">
<forward name="success" path="/success.jsp"></forward>
<forward name="deleteSuccess" path="/deleteSuccess.jsp"></forward>
</action>
</action-mappings>
<message-resources parameter="com.yourcompany.struts.ApplicationResources" />
</struts-config>
Jsp页面的源代码：
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'userTest.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form name="myform" action="test.do" method="post">
<input type="text" name="userName"/><br>
<input type="text" name="password"/><br>
<input type="submit" name="method" value="add"/>
<input type="submit" name="method" value="delete"/>
</form>
</body>
</html>
配置文件的写法：
# Resources for parameter 'com.yourcompany.struts.ApplicationResources'
# Project demo3
submit.add=add
submit.delete=delete
userform的写法：
package com.inspur.view;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
public class UserForm extends ActionForm{
private String userName;
private String password;
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public UserForm(String userName, String password) {
super();
this.userName = userName;
this.password = password;
}
public UserForm(){
}
@Override
public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
// TODO Auto-generated method stub
return super.validate(mapping,request);
}
}
以上为LookupDispatchAction类的全部使用步骤。