package org.qiujy.web.struts2.action;
 
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
 
/**
 *@authorqiujy
 *@version1.0
 */
publicclass LoginAction extends ActionSupport{
    private String userName;
    private String password;
   
    private String msg; //结果信息属性
   
    /**
     *@returnthemsg
     */
    public String getMsg() {
        returnmsg;
    }
    /**
     *@parammsgthemsgtoset
     */
    publicvoid setMsg(String msg) {
        this.msg = msg;
    }
    /**
     *@returntheuserName
     */
    public String getUserName() {
        returnuserName;
    }
    /**
     *@paramuserNametheuserNametoset
     */
    publicvoid setUserName(String userName) {
        this.userName = userName;
    }
    /**
     *@returnthepassword
     */
    public String getPassword() {
        returnpassword;
    }
    /**
     *@parampasswordthepasswordtoset
     */
    publicvoid setPassword(String password) {
        this.password = password;
    }
   
    /**
     *处理用户请求的login()方法
     *@return结果导航字符串
     *@throwsException
     */
    public String login() throws Exception{
        if("test".equals(this.userName) && "test".equals(this.password)){
            msg = "登录成功，欢迎" + this.userName;
            //获取ActionContext实例，通过它来访问Servlet API
            ActionContext context = ActionContext.getContext();
            //看session中是否已经存放了用户名，如果存放了：说明已经登录了；
//否则说明是第一次登录成功
            if(null != context.getSession().get("uName")){
                msg = this.userName + "：你已经登录过了!!!";
            }else{
                context.getSession().put("uName", this.userName);
            }
           
            returnthis.SUCCESS;
        }else{
            msg = "登录失败，用户名或密码错";
            returnthis.ERROR;
        }
    }
   
    public String regist() throws Exception{
        //将用户名，密码添加到数据库中
        //...
        msg = "注册成功。";
        returnthis.SUCCESS;
    }
}

<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
        "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <package name="my" extends="struts-default" namespace="/manage">
    <!-- 定义处理请求URL为login.action的Action -->
        <action name="userOpt" class="org.qiujy.web.struts2.action.LoginAction">
        <!-- 定义处理结果字符串和资源之间的映射关系 -->
            <result name="success">/success.jsp</result>
            <result name="error">/error.jsp</result>
        </action>
    </package>
</struts>