Struts2繼承ActionSupport流程
阿新 • • 發佈：2018-11-01
今天這個是來講述Struts2繼承ActionSupport，其中有以下幾步
1.是最簡單也是必不可少的一步了
2.這個繼承的 需要做兩個JSP，一個需要用來作為登入介面，一個用來顯示。
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%@ taglib prefix="s" uri="/struts-tags"%> <html> <head> <meta http-equiv="Content-Type" content="text/html; utf-8"> <title>Insert title here</title> <style type="text/css"> ul,li { list-style-type:none; margin:0px; float:left; } </style> </head> <body> <form action="helloworldAction" method="post"> <input type="hidden" name="submitFlag" value="login"/> <div> <font color=red><s:fielderror fieldName="account"/></font> <br/> 賬號:<input type="text" name="account"> </div> <div> <font color=red><s:fielderror fieldName="password"/></font> <br/> 密碼:<input type="password" name="password"> </div> <input type="submit" value="提交"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% 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 'welcome.jsp' starting page</title> </head> <body> 登入成功 <br> </body> </html>
這是兩個JSP完成了
3.新建一個類以及配置檔案
以下為程式碼可以參考
package com.hipn.show; import com.opensymphony.xwork2.ActionSupport; public class HelloWorldAction extends ActionSupport { private String account; private String password; private String submitFlag; public String execute() throws Exception { this.businessExecute(); return "toWelcome"; } public void validate(){ if(account==null || account.trim().length()==0){ this.addFieldError("account", "賬號不可以為空"); } if(password==null || password.trim().length()==0){ this.addFieldError("password", "密碼不可以為空"); } if(password!=null && !"".equals(password.trim()) && password.trim().length()<6){ this.addFieldError("password", "密碼長度至少為6位"); } } /** * 示例方法，表示可以執行業務邏輯處理的方法， */ public void businessExecute(){ System.out.println("使用者輸入的引數為==="+"account="+account+",password="+password+",submitFlag="+submitFlag); } public String getAccount() { return account; } public void setAccount(String account) { this.account = account; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getSubmitFlag() { return submitFlag; } public void setSubmitFlag(String submitFlag) { this.submitFlag = submitFlag; } }
下面是配置檔案
<?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="helloworld" extends="struts-default">
<action name="helloworldAction" class="com.hipn.show.HelloWorldAction">
<result name="toWelcome">/welcome.jsp</result>
<result name="input">/index.jsp</result>
</action>
</package>
</struts>
這個需要注意的是在Class的地方那個路徑要和你上面那個類的路徑一致，還有action name這裡要和上面JSP頁面那裡也要一致。
4.配置一個過濾器當然jar也不要忘了加進去
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.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.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
下面為顯示效果
這樣一個Struts2繼承ActionSupport流程就完成了，有什麼不完整的地方，歡迎各路大神提出來。