struts2框架搭建
一、需要导入的包：
commons-logging-1.0.4.jar
freemarker-2.3.8.jar
ognl-2.6.11.jar
struts2-core-2.0.11.jar
xwork-2.0.4.jar
二、配置文件
1。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">
<display-name>Struts 2.0 Hello World</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
2。struts.xml:
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<include file="struts-default.xml"/>
<package extends="struts-default">
<action >
<result >/success.jsp</result>
<result >/error.jsp</result>
<result type="redirect">Login!error.action?key=${}</result>
</action>
</package>
</struts>
注：<result type="redirect">Login!error.action?key=${}</result>
其中type="redirect"指的是可以按url重定向，其中当然可以写入带参数的URL了。
key必须在action中定义变量，${}是传参数的格式，可以写入变量的名字也可不写。
3。struts.properties
struts.devMode=true
struts.enable.DynamicMethodInvocation=true //允许使用动态方法
struts.custom.i18n.resources=label
4。Login.java
package com.pac.struts2;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class Login extends ActionSupport{
private String message;
private String userName;
private String key;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public String login(){
String message1 = " Hello, 请填写用户名!" ;
HttpServletRequest request = ServletActionContext.getRequest();
if(getUserName()==null || "".equals(getUserName())){
return LOGIN;
}
message = getUserName()+"你好啊!!";
return SUCCESS;
}
public String error() throws Exception {
HttpServletRequest request = ServletActionContext.getRequest();
String key = request.getParameter("key");
if(key!=null && !"".equals(key)){
setKey(key+" 你好啊!!");
}else{
setKey("mmm 你好啊!!");
}
message = getKey();
return SUCCESS;
}
}
5。页面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix = "s" uri = "/struts-tags" %>
<%
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 'success.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>
<font color="green">This is my success page.</font><br>
<s:property value="message"/>
</body>
</html>