Struts-登录-代码1

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web.xml

<!-- 定义Struts2的核心控制器StrutsPrepareAndExcuteFilter -->    <filter>        <filter-name>struts2</filter-name>        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>    </filter>    <!-- StrutsPrepareAndExcuteFilter用来处理所有的http请求 -->    <filter-mapping>        <filter-name>struts2</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>

<s:form action="login">        <s:actionmessage />        <s:textfield name="username" label="username" />        <s:textfield name="password" label="password" />        <s:submit value="login" />    </s:form>

index.jsp

 welcome to  ${sessionScope.user} user ,login success!

error.jsp

no ${sessionScope.user} user ,login error!

struts.xml

<?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="struts2" extends="struts-default">        <action name="login" class="com.struts2.action.LoginAction">            <result name="success">/index.jsp?user=${12}</result>            <result name="error">/error.jsp</result>            <result name="input">/login.jsp</result>        </action>    </package></struts>

/* * Creation : 8 Oct 2015 */package com.struts2.action;import org.apache.commons.lang3.StringUtils;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;public class LoginAction extends ActionSupport {    /** The Constant serialVersionUID. */    private static final long serialVersionUID = 2078216757486534803L;    private String username;    private String password;    public String execute() throws Exception {        System.out.println("username:" + username + "--password:" + password);        ActionContext.getContext().getSession().put("user", username);        if (username.equals("11")) {            return SUCCESS;        }        return ERROR;    }    public void validate() {        if (StringUtils.isEmpty(username)) {            addFieldError("username", "username");            addActionMessage("awsd");        }        if (StringUtils.isEmpty(password)) {            addFieldError("password", "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;    }}

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