Struts2学习笔记之入门-优快云博客

本文链接：https://blog.youkuaiyun.com/JavaChenYang/article/details/2981634

前提条件,在项目中有选择地导入以下struts2中的包.

xwork-2.0.5.jar

commons-logging-1.0.jar

commons-logging-api-1.1.jar

freemarker-2.3.8.jar

ognl-2.6.11.jar

struts2-core-2.0.11.2.jar

配置web.xml文件,代码如下:

 
 <?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>
  <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>
 

登陆表单为例

第一步,在index.jsp中,加入以下代码,生成表单

 
 <form action="LoginAction.action" method="post">
        username:<input type="text" name="username"/>
        password:<input type="password" name="password"/>
        <input type="submit" value="提交"/>
</form>
 

注意,若使用struts2表单标签,则无须加上".action"后缀.如:<s:form action="LoginAction" method="post">,为效率考虑,建议使用HTML标签.

第二步,完成LoginAction

代码如下:

 
  package com.dadao.struts2;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;
import org.apache.struts2.interceptor.SessionAware;
import com.opensymphony.xwork2.ActionSupport;
public class Login extends ActionSupport implements ServletRequestAware ,ServletResponseAware,SessionAware
{
    private String message;
    private HttpSession session=null;
    private HttpServletRequest request;
    private HttpServletResponse response;
    private Map attribute;
    public void setServletRequest(HttpServletRequest req) {
        this.request=req;
    }
    public void setServletResponse(HttpServletResponse resp) {
        this.response=resp;
    }
    public void setSession(Map map) {
        this.attribute=map;
    }
    @Override
    public String execute() throws Exception {
        StringBuffer sb=new StringBuffer();
        sb.append("you user name is: ");
        sb.append(request.getParameter("username"));
        sb.append("you passwored is: ");
        sb.append(request.getParameter("password"));
        session=request.getSession();
        attribute.put("message", sb.toString());
        sb.append("session's message is: ");
        sb.append(session.getAttribute("message"));
        message=sb.toString();
        return SUCCESS;
    }
    public String getMessage() {
        return message;
    }
    public void setMessage(String message) {
        this.message = message;
    }
    
    
    
}
 
 

第三步,在src目录下,新建struts.xml.

代码如下:

 
   <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
        "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <package name="strutsPackage" extends="struts-default">
        <action name="LoginAction" class="com.dadao.struts2.Login">
            <result>/message.jsp</result>
        </action>
    </package>
</struts>
 
  

第四步,完成message.jsp.代码如下:

 
   <%@ 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 'HelloWorld.jsp' starting page</title>
  </head>
  <body> 
       <s:property value="message"/>
       <br>
  </body>
</html>
 
  

第五步,测试.