java Struts2 框架的搭建与简单的登录验证

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新建一个web项目下载如下包，放到lib目录下

配置添加web.xml

 <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>*.action</url-pattern>  </filter-mapping>

创建struts.xml 文件，配置文件

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN""http://struts.apache.org/dtds/struts-2.3.dtd"><struts>    <package name="default" namespace="/" extends="struts-default"><global-results>            <result name="error">/login.jsp</result>        </global-results> <action name="index_*"  class="com.sdmc.one.IndexAction" method="{1}">             <result name="login">/login.jsp</result>        </action>        <action name="login_*"  class="com.sdmc.one.LoginAction" method="{1}">        <result name="input">/login.jsp</result>            <result name="index">/index.jsp</result>        </action>    </package>    <include file="example.xml"/>    <!-- Add packages here --></struts>

IndexAction 中的代码

package com.sdmc.one;import com.opensymphony.xwork2.ActionSupport;public class IndexAction extends ActionSupport {public String execute(){System.out.println("Action执行了index");return "login";}}

LoginAction 中的代码

package com.sdmc.one;import com.opensymphony.xwork2.ActionSupport;public class LoginAction extends ActionSupport {private String username;private String password;public String execute(){System.out.println("执行了login");return "index";}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;}}

验证文件 LoginAction-validation ，验证文件要放到同一个报下，名称要和类名相同才能找到。

<!DOCTYPE validators PUBLIC        "-//Apache Struts//XWork Validator 1.0.2//EN"        "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd"><validators>    <field name="username">        <field-validator type="requiredstring">            <message>请输入用户名</message>        </field-validator>    </field>    <field name="password">        <field-validator type="requiredstring">            <message>请输入密码</message>        </field-validator>    </field></validators>

<?xml version="1.0" encoding="UTF-8"?><%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /><title>Insert title here</title></head><body><s:form action="login" method="post"><s:textfield name="username" label="用户名" ></s:textfield><s:password name="password"  label="密码" ></s:password><s:submit key="submit" value="登录"></s:submit></s:form></body></html>

访问路径

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