Struts2 入门训练1

来源：互联网发布：windows7怎样优化电脑编辑：程序博客网时间：2024/05/17 06:03

之前有学了一点struts，不过才开始认真写代码，很基础。

首先是WebContent/WEB-INF/lib导入一些基本包

asm-3.3.jar

asm-commom-3.3.jar

asm-tree-3.3.jar

commons-fileupload-1.3.1.jar

commons-io-2.2.jar

commons-lang3-3.2.jar

freemarker-2.3.22.jar

javassist-3.11.0.GA.jar

ognl-3.0.6.jar

struts2-core-2.3.24.jar

xwork-core-2.3.24.jar

然后WebContent下创建三个文件

error.jsp

<%@ page language="java" 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>Insert title here</title></head><body>   <p>${error}<br></p></body></html>

success.jsp

<%@ page language="java" 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>Insert title here</title></head><body>  <p>${success}<br></p>  <h2>用户登录信息</h2>     用户名:${username}<br>   密码:${password}<br></body></html>

<%@ page language="java"     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>Insert title here</title></head><body> <div align="center">    <form action="login" method="post">                  用户名:<input type="text" name="username"/><br>                 密码:<input type="password" name="password"/><br>      <input type="submit" value="登录"/>    </form> </div></body></html>

然后WEB-INF/下创建一个web.xml配置文件，设置过滤器

<?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" 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>Two</display-name>  <welcome-file-list>    <welcome-file>index.html</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>

在src目录下创建一个包,cn.itcast.action

创建一个java文件

package cn.itcast.action;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;public class LoginAction extends ActionSupport{     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;       }     @Override     public String execute() throws Exception{    ActionContext context = ActionContext.getContext();    if("itcast".equals(username) && "123".equals(password)){    context.put("username", username);    context.put("password", password);    context.put("success", "用户登录成功");    return SUCCESS;    }    else{    context.put("error", "用户登录失败");    return ERROR;    }     }}

在src下创建一个struts.xml文件

<?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-2.3.dtd"><struts>   <package name="default" namespace="/" extends="struts-default">      <action name="login" class="cn.itcast.action.LoginAction">         <result name="success">/success.jsp</result>         <result name="error">/error.jsp</result>      </action>     </package></struts>

到这里一个简单的登录验证框就出来了。

期间碰到了一些问题。

1 要点击server 里面的tomcat项目进去看到一个server option选择第二个框勾上，不然会出现错误，

Publish module contexts to separate XML files 这一项记得勾上

2 server Location里面一开始是勾上第一项的，有可能要选择第二项才可以，

Use Tomcat installation这一项

3 还有就是一些包名打错检查了好一会儿。

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