16 April 2017

Struts 2 Framework: Interceptor trong Struts 2 - Interceptor vs Login - Dynamic web project

By  at  10:48:00 PM   ,   1 comment
login.jsp
Html 2017
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@taglib uri="/struts-tags" prefix="s"%>
<!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=ISO-8859-1">
        <title>Insert title here</title>
    </head>
    <body>
        <form action="loginUser" method="POST">
            UserName:<input type="text" name="userName" /><br /> 
            Password:<input type="password" name="password" /><br />
            <input type="submit" value="Login" />
        </form>

    <s:if test="hasActionMessages()">
        <div class="welcome">
            <s:actionmessage /> //message addActionMessage
        </div>
    </s:if>
</body>
</html>
home.jsp
Html 2017
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@taglib uri="/struts-tags" prefix="s"%>
<!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=ISO-8859-1">
        <title>Insert title here</title>
    </head>
    <body>
        Welcome! <s:property value="%{#session.loginID}"/>
    <br/><a href="logOut">LogOut</a>
</body>
</html>
LoginAction.java
Html 2017
package demo.Interceptor;

import java.util.Map;

import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport implements SessionAware {

    private String userName;
    private String password;
    private Map<String, Object> session = ActionContext.getContext().getSession();

    @Override
    public void setSession(Map<String, Object> session) {
        this.session = session;
    }

    public Map<String, Object> getSession() {
        return session;
    }

    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;
    }

    public String login() {
        if ("aaa".equals(userName) && "12345".equals(password)) {
            session.put("loginID", userName);
            System.out.println("Login success");
            return SUCCESS;
        } else {
            addActionMessage("Username can't be blanked");
            System.out.println("Login fail");
            return LOGIN;
        }
    }

    public String logOut() {
        System.out.println("LogOut");
        session.remove("loginID");
        addActionMessage("You have been Successfully Logged Out");
        return SUCCESS;
    }

    public String home() {
        System.out.println("Welcome home");
        return SUCCESS;
    }
}
LoginInterceptor.java
Html 2017
package demo.Interceptor;

import java.util.Map;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public class LoginInterceptor extends AbstractInterceptor {

    @Override
    public String intercept(ActionInvocation invocation) throws Exception {
        Map<String, Object> session = invocation.getInvocationContext().getSession();

        String loginId = (String) session.get("loginID");

        if (loginId == null) {
            //Neu null session thi khong cho vao home.jsp
            return Action.LOGIN;
        } else {
            //Neu co session thi cho vao home.jsp
            return invocation.invoke();
        }
    }

}
struts.xml
Html 2017
<?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" extends="struts-default">
        <interceptors>
            <interceptor class="demo.Interceptor.LoginInterceptor" name="loginInterceptor">
            </interceptor>
            <interceptor-stack name="loginStack">
                <interceptor-ref name="loginInterceptor" />
                <interceptor-ref name="defaultStack" />
            </interceptor-stack>
        </interceptors>

        <!-- login action -->
        <action name="loginUser" class="demo.Interceptor.LoginAction" method="login">
            <result name="success" type="redirect">homeAction</result>
            <result name="login">login.jsp</result>
        </action>

        <!-- home link action -->
        <action name="homeAction" class="demo.Interceptor.LoginAction" method="home">
            <interceptor-ref name="loginStack" />
            <result name="login">login.jsp</result>
            <result name="success">home.jsp</result>
        </action>

        <!-- logout action -->
        <action name="logOut" class="demo.Interceptor.LoginAction" method="logOut">
            <result name="success">login.jsp</result>
        </action>
    </package>
</struts>
web.xml
Html 2017
<?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_3_0.xsd" id="WebApp_ID" version="3.0">
    <display-name>DemoInterceptor</display-name>

    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>
            org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter
        </filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <session-config>
        <session-timeout>1</session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>login.jsp</welcome-file>
    </welcome-file-list>
</web-app>
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1 nhận xét:

  1. Unknown8/10/18

    cho mình hỏi ad đã logout r thì làm s mà nhấn nút back vẫn còn hiện giá trị thế kia

    ReplyDelete

 

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