structs 2 学习总结（一）

时间：2023-03-08 17:03:13

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1.页面传值。

传值

前台

    <s:form action="login1">//action 名字 需要在structs配置

        用户<s:textfield name="user.userName" type="text"/>//传对象

        <s:textfield name="user.password" key="pass" />//传对象

        <s:textfield name="password" key="pass" />//传值

        <s:submit key="login" />

    </s:form>

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>

<constant name="struts.ognl.allowStaticMethodAccess" value="true"></constant>

    <package name="userManager" namespace="/" extends="struts-default">

<!-- //登录 -->

        <action name="login1" class="action.LoginAction" method="login">

            <result name="success">/loginuser.jsp</result>

            <result name="loginout">/adetails.jsp</result>

        </action>

        <!-- //登出 -->

        <action name="loginout" class="action.LoginAction" method="loginout">

            <result name="success">/login.jsp</result>

            <result name="loginout">/adetails.jsp</result>

        </action>

</package>

</struts>

后台类

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import bean.User;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport{

    /**

     *

     */

    private static final long serialVersionUID = 1L;

    private String userName;

    private String password;

    public String getUserName() {

        return userName;

    }

    public void setUserName(String userName) {

        this.userName = userName;

    }

    public String getPassword() {

        return password;

    }

    //与前台页面name="password" 一致

    public void setPassword(String password) {

        this.password = password;

    }
   // 此处用于传对象

    private User user;

    public User getUser() {

        return user;

    }

    public void setUser(User user) {

        this.user = user;  //structs 把对应的值放到对象，在这里获取 user.userName,user.password 在这里把对象赋值,下面才可以调用


    }

    public String login(){

        HttpServletRequest request = ServletActionContext.getRequest();

        System.out.println("111");

        System.out.print(user);

        request.getSession().setAttribute("username", user.getUserName());

        request.getSession().setAttribute("user", user);

        System.out.println(user.getUserName());

        return "success";

    }

    public String loginout(){

        HttpServletRequest request = ServletActionContext.getRequest();

        request.getSession().setAttribute("username", "");

       /* HttpServletRequest request = ServletActionContext.getRequest();

        request.getSession().setAttribute("username", user.getUserName());

       或者  把Username 设置为空

    */    

        return "success";

    }

}

前台页面

<%@taglib prefix="s" uri="/struts-tags"%>

<body>

  <s:a href="loginout.action">登出

  </s:a>

   用户名：<s:property value="user.userName" />

    密码：<s:property value="user.password"/>

    <s:property value="password"/>

    值：

    <br>

  用struts标签： <s:property value="#session.username" />

  <br>

用EL表达式：${session.username}

<br>

用java代码：<%=session.getAttribute("username")%>

<br>

 对象

 <br>

   用struts标签： <s:property value="#session.user.userName" />

  <br>

用EL表达式：${session.user.password}

<br>

用java代码：<%=session.getAttribute("user")%>

此处还用到过滤器

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