FLEX中的Session管理

转自：呼啸,原文地址：http://blog.csdn.net/howlaa/article/details/8533180

 

最近做的项目需要保存从FLEX端登录进来的信息。我最先想到的是HttpServlet的Session来管理。以失败而告终。又试着用全局变量保存，也失败了。折腾的够呛。今天又在苦苦寻找，无意中看到一篇文章，终于解决。非常感谢原文作者!

我的代码因为是实际项目，牵涉点较多，可能影响你观察FLEX中的Session，你可以看原文章，较为简洁。地址：http://blog.csdn.net/zc529739024/article/details/8045227#reply

FLEX中实现Session的一个类是FlexContext类，他将SESSION保存在服务端。

1、首先，确保你的BLAZEDS搭建（将下载得到的blazeds解压，将解压得到的WEB-INF和META-INF两个文件夹拷贝到你的WEB-ROOT文件下）的利用Object 与java通讯正常。

2、新建java类 FlexSession：

 

package com.greencloud.service;


import flex.messaging.FlexContext;
public class FlexSession {
    /**
     * 保存Session
     * @author wangfeng
     * @date 2013-01-23 11:12:39
     * @param name
     * @param value
     */
    public void setSession(String name,String value){
        FlexContext.getFlexSession().setAttribute(name,value);
    }

    /**
     * 获取Session
     * @author wangfeng
     * @date 2013-01-23 11:12:50
     * @param name
     * @return
     */
    public String getSession(String name){
        String value=(String) FlexContext.getFlexSession().getAttribute(name);
        return value;
    }

    /**
     * 清除Session
     * @author wangfeng
     * @date 2013-01-23 11:13:10
     * @param name
     */
     public void removeSession(String name){
         FlexContext.getFlexSession().removeAttribute(name);
     }
}

3、在WBE-INF\flex\remoting-config.xml里配置：

 

 

<?xml version="1.0" encoding="UTF-8"?>
<service id="remoting-service"
    class="flex.messaging.services.RemotingService">

    <adapters>
        <adapter-definition id="java-object" class="flex.messaging.services.remoting.adapters.JavaAdapter" default="true"/>
    </adapters>

    <default-channels>
        <channel ref="my-amf"/>
    </default-channels>

    <destination id="serviceTest">
        <properties>
            <source>test.ServiceTest</source>
        </properties>
    </destination>

    <destination id="UserService">
        <properties>
            <source>com.greencloud.service.UserService</source>
        </properties>
    </destination>

     <destination id="dayReportService">
        <properties>
            <source>com.greencloud.dao.DayreportDao</source>
        </properties>
    </destination>

    <destination id="sessionManage">
        <properties>
            <source>com.greencloud.service.FlexSession</source>
        </properties>
    </destination>
</service>

UserService.java:

 

package com.greencloud.service;


import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServlet;

import com.greencloud.db.DBUtlie;
import com.greencloud.entity.User;

public class UserService extends HttpServlet{
    /**
     *
     */
    private static final long serialVersionUID = 1L;
    private Connection con = null;
    private PreparedStatement ps;
    private ResultSet rs;
    private User user;
    private FlexSession flexSession;
    public List<User> getUserList()throws SQLException{
        List<User> list = new ArrayList<User>();
        try{
            list = new ArrayList<User>();
            con = new DBUtlie().getConnection();
            String sql = "select * from s_user";
            ps = con.prepareStatement(sql);
            rs = ps.executeQuery();
            while(rs.next()){
                User user = new User();
                System.out.println("query it's ok");
                user.setUserId(rs.getInt("userId"));
                user.setLoginName(rs.getString("loginName"));
                user.setPassword(rs.getString("password"));
                user.setRealName(rs.getString("realName"));
                user.setEmail(rs.getString("email"));
                user.setDesc(rs.getString("desc"));
                user.setDeptId(rs.getInt("deptId"));
                user.setDeptName(rs.getString("deptName"));
                user.setOrderBy(rs.getInt("orderBy"));
                user.setIsAdmin(rs.getInt("isAdmin"));
                user.setIsLocked(rs.getInt("isLocked"));
                list.add(user);
            }
        }catch (Exception e) {
            e.printStackTrace();
        }finally{
            try{
                rs.close();
                ps.close();
                con.close();
            }catch (Exception e) {
                e.printStackTrace();
            }
        }
        return list;
    }

    public String userLogin(String name,String password){
        String userName = name;
        System.out.println("loginName:"+name);
        System.out.println("password:"+password);
        List<User> list = new ArrayList<User>();
        try{
            list = new ArrayList<User>();
            con = new DBUtlie().getConnection();
            String sql = "select * from s_user where loginName = '"+userName+"'";
            ps = con.prepareStatement(sql);
            rs = ps.executeQuery();
            while(rs.next()){
                User user = new User();
                System.out.println("query it's ok");
                user.setUserId(rs.getInt("userId"));
                user.setLoginName(rs.getString("loginName"));
                user.setPassword(rs.getString("password"));
                user.setRealName(rs.getString("realName"));
                user.setEmail(rs.getString("email"));
                user.setDesc(rs.getString("desc"));
                user.setDeptId(rs.getInt("deptId"));
                user.setDeptName(rs.getString("deptName"));
                user.setOrderBy(rs.getInt("orderBy"));
                user.setIsAdmin(rs.getInt("isAdmin"));
                user.setIsLocked(rs.getInt("isLocked"));
                list.add(user);
            }
        }catch (Exception e) {
            e.printStackTrace();
        }finally{
            try{
                rs.close();
                ps.close();
                con.close();
            }catch (Exception e) {
                e.printStackTrace();
            }
        }
        if(list == null || list.size()<1){
            return "fail";
        }

        for(int i=0;i<list.size();++i){
            user = list.get(i);
        }

        System.out.println("password:"+user.getPassword());
        if(user.getPassword().equals(password)){
            flexSession = new FlexSession();
            System.out.println("login success...");
            flexSession.setSession("account", user.getRealName());
            System.out.println("flexSession is ok!");
            return "success";
        }
        else{
            System.out.println("login fail...");
            return "fail";
        }
    }


}

 

FLEX端：

 

登录页：

logClient.mxml：

 

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" applicationComplete="application1_applicationCompleteHandler(event)">
    <fx:Declarations>
        <!-- 将非可视元素（例如服务、值对象）放在此处 -->
    <!-- <s:RemoteObject id="sessionManage" endpoint="http://localhost:8080/log/messagebroker/amf" destination="sessionManage">
            <s:method name="setSession" result="sessionManage_resultHandler(event)" fault="sessionManage_faultHandler(event)"/>
        </s:RemoteObject>-->

        <s:RemoteObject id="UserService" endpoint="http://localhost:8080/log/messagebroker/amf" destination="UserService">
            <s:method name="userLogin" result="userLogin_resultHandler(event)" fault="userLogin_faultHandler(event)"/>
        </s:RemoteObject>
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            import com.greencloud.view.IndexView;
            import com.greencloud.vo.User;
            import mx.charts.CategoryAxis;
            import mx.collections.ArrayList;
            import mx.controls.Alert;
            import mx.controls.Tree;
            import mx.core.Application;
            import mx.events.FlexEvent;
            import mx.events.Request;
            import mx.managers.PopUpManager;
            import mx.rpc.events.FaultEvent;
            import mx.rpc.events.ResultEvent;

            //初始化方法

            protected function application1_applicationCompleteHandler(event:FlexEvent):void
            {

                this.addEventListener(KeyboardEvent.KEY_DOWN,onEnterHandler);

            }

            //登录
            protected function login_clickHandler(event:MouseEvent):void
            {


                var strLoginName:String = loginName.text;
                var strPassword:String = password.text;
                if(strLoginName!="" && strPassword!="")
                {
                    UserService.userLogin(strLoginName,strPassword);
                }
                else{
                    Alert.show("用户名或密码不能为空","系统提示");
                }
            }

            //监听回车键
            protected function onEnterHandler(event:KeyboardEvent):void
            {
                if(event.keyCode == Keyboard.ENTER)
                {
                    var strLoginName:String = loginName.text;
                    var strPassword:String = password.text;
                    if(strLoginName!="" && strPassword!="")
                    {
                        UserService.userLogin(strLoginName,strPassword);
                    }
                    else{
                        Alert.show("用户名或密码不能为空","系统提示");
                    }
                }
            }


            protected function userLogin_resultHandler(event:ResultEvent):void
            {
                var str:String = event.result as String;
                if(str == "success")
                {

                    Alert.show("this.user is...");
                    var indexUrl:URLRequest = new URLRequest("http://localhost:8080/log/logClient-debug/IndexView.html");
                    try
                    {
                        navigateToURL(indexUrl,"_self");
                    }
                    catch(e:Error){
                        Alert.show("跳转页面失败","系统提示");
                    }
                }
                else
                {
                    Alert.show("登录失败，请检查用户名和密码的正确性","系统提示");
                }
            }

            protected function userLogin_faultHandler(event:FaultEvent):void
            {
                Alert.show(event.fault.message,"出错了");
            }


            //重置
            protected function reset_clickHandler(event:MouseEvent):void
            {
                loginName.text=null;
                password.text=null;
            }



        ]]>
    </fx:Script>
    <s:Panel width="100%" height="70%"  top="50" bottom="10" left="10" right="10">
        <s:layout>
            <s:HorizontalLayout paddingBottom="5" paddingLeft="5" paddingRight="5" paddingTop="5" gap="10"/>
        </s:layout>
        <s:VGroup width="100%" height="100%">
        </s:VGroup>
        <s:VGroup width="100%" height="100%">
            <s:Spacer width="100%" height="100%">
            </s:Spacer>
            <mx:FormItemLabel text="用户登录:" fontSize="15" fontWeight="normal"/>
            <s:FormItem label="用户名:" textAlign="left" fontSize="13">
                <s:HGroup>
                    <s:Spacer width="5" height="100%"/>
                    <s:TextInput id="loginName" maxChars="250"/>
                </s:HGroup>
            </s:FormItem>
            <s:FormItem label="密码:" textAlign="left" fontSize="13">
                <s:HGroup>
                    <s:Spacer width="17" height="100%"/>
                    <s:TextInput id="password" maxChars="250" displayAsPassword="true"/>
                </s:HGroup>
            </s:FormItem>
            <s:HGroup  width="100%">
                <s:Spacer width="15" height="100%"/>
                <s:Button id="login" label="登录" click="login_clickHandler(event)"/>
                <s:Spacer width="35" height="100%"/>
                <s:Button id="reset" label="重置" click="reset_clickHandler(event)"/>
            </s:HGroup>
            <s:Spacer width="100%" height="100%">
            </s:Spacer>
        </s:VGroup>
    </s:Panel>

</s:Application>

跳转页：IndexView.mxml

 

 

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx"  minWidth="955" minHeight="600" applicationComplete="application1_applicationCompleteHandler(event)">
    <fx:Declarations>
        <!-- 将非可视元素（例如服务、值对象）放在此处 -->
        <s:RemoteObject id="sessionManage" destination="sessionManage" endpoint="http://localhost:8080/log/messagebroker/amf">
            <s:method name="getSession" result="sessionManage_resultHandler(event)" fault="sessionManage_faultHandler(event)"/>
        </s:RemoteObject>
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            import com.greencloud.component.PanelEx;
            import com.greencloud.vo.User;

            import mx.collections.ArrayList;
            import mx.controls.Alert;
            import mx.controls.Tree;
            import mx.core.FlexGlobals;
            import mx.events.FlexEvent;
            import mx.rpc.events.FaultEvent;
            import mx.rpc.events.ResultEvent;
            [Bindable]private var account:String="";

            protected function sessionManage_resultHandler(event:ResultEvent):void
            {
                //注意获得Session的方式
                account=event.result as String;
                message.text=account+",欢迎您归来..."
            }

            protected function sessionManage_faultHandler(event:FaultEvent):void
            {
                Alert.show("获取session失败...","提示");
            }



            protected function application1_applicationCompleteHandler(event:FlexEvent):void
            {

                //获取session
                sessionManage.getSession("account");
            }

            protected function exist_clickHandler(event:MouseEvent):void
            {
                // TODOAuto-generated method stub
                //清除session
                sessionManage.removeSession("account");
                var url:URLRequest=new URLRequest("http://localhost:8080/log/logClient-debug/logClient.html");
                navigateToURL(url,"_self");
            }

        ]]>
    </fx:Script>
    <s:Label x="394" y="229" fontSize="18" width="229" height="31" id="message"/>
    <s:Button x="443" y="283" label="退出" id="exist" fontSize="16" click="exist_clickHandler(event)"/>
</s:Application>