菜鸟程序媛求助。(String)session.getAttribute("userName")取值为空，session里面值已经存进去了，但是取不出来

public void uploadOnCreate(HttpServletRequest req,
HttpServletResponse resp, String destination)
throws ServletException, IOException {
FileOutputStream byteout = null;
DataInputStream inputStream = null;
try {
String contentType =Facility.procNull(req.getParameter("contentType"));
String currUser = (String) req.getSession()
.getAttribute("userName");
String businessId = Facility.procNull(req.getParameter("businessId"));
String workitem_id = Facility.procNull(req.getParameter("workitem_id"));
workitem_id = URLDecoder.decode(workitem_id,"utf-8");
inputStream = new DataInputStream(req.getInputStream());
int filesize = inputStream.available();
// 创建附件对象
String attId = IDCreateFactory.getIDByName(Document.IDNAME);
String fileName = "content" + System.currentTimeMillis()
+ contentType;
String app_filename = attId
+ fileName.substring(fileName.lastIndexOf("."));
Document document = new Document(attId, currUser, fileName,
app_filename, filesize, destination, null, null, null);
// 创建附件信息对象
String bAttId = IDCreateFactory.getIDByName(Content.IDNAME);
Content content = new Content(bAttId, businessId, currUser,
new Date(), workitem_id, currUser, new Date(), 1, 0, attId);
contentService.saveContentAndDocument(content, document);
// 保存正文文件
System.out.println("1-->" + root + destination);
File saveFile = new File(root + destination + app_filename);
byteout = new FileOutputStream(saveFile);
int c = 0;
byte[] bytes = new byte[1024];
while ((c = inputStream.read(bytes)) != -1) {
byteout.write(bytes, 0, c);
}

// 日志开始
String action = this.getClass().getName()
+ "uploadOnCreate(HttpServletRequest req,HttpServletResponse resp, String destination)";
String logDescription = "新建Id：【"+bAttId+"】名称：【" +fileName  + "】正文";
UserOperationLog userOperationLog = new UserOperationLog(action,
UserOperationLog.TYPE_USEROPERATE, UserOperationLog.PROTO_INSERT,
logDescription);
this.saveUserOperationLog(req, userOperationLog);
// 日志结束


} catch (Exception e) {
e.printStackTrace();
} finally {
byteout.flush();
byteout.close();
inputStream.close();
}
}

哪位大神帮忙看一下

24 个解决方案

#1

本帖最后由 wlwlwlwl015 于 2016-09-12 15:09:35 编辑

(String)session.getAttribute("userName")取值为空?

你session是怎么存的， 还有确保你session没被清除

#2

//代码

贴代码注意一下格式，看的脑袋疼没看到在哪里放的，在哪取的

#3

你最好把上一个处理数据的页面或者servlet也发出来看看

#4

不好意思哈，第一次在这上面发帖求助，没太注意，这个就是servlet

#5

//创建session
    public void createdSession(HttpServletRequest request) {
     HttpSession session=request.getSession();
     if(session!=null)
     {
     String sessionId=session.getId();
     String loginName=(String)session.getAttribute("loginname");
     String userName=new SXRecipient((String)session.getAttribute(IUser.USER_ID)).getRecipName();
     String userIp=(String)session.getAttribute("iv-remote-address");
     String departmentName="";
     Vector v=(Vector)request.getSession().getAttribute(IUser.USER_ORG_ID_NAME);
     if(v!=null)
     {
     departmentName=new SXRecipient(v.get(0)).getRecipName();
     }
     OnlineUser user=new OnlineUser();
     user.setLoginName(loginName);
     user.setUserIp(userIp);
     user.setLoginTime(new Date());
     user.setUserName(userName);
     user.setDepartmentName(departmentName);
         online.put(loginName, user);
     }
}
这个是存值的代码

#6

package com.business.login;

import java.util.Date;
import java.util.HashMap;
import java.util.Vector;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
import com.business.workflow.SXRecipient;
import com.dhcc.framework.core.IUser;
/**
 * session监听
 * @author yuelulu
 *
 */
public class OnlineCounterListener implements HttpSessionListener {

public static HashMap<String,OnlineUser> online=new HashMap<String,OnlineUser>();

public void sessionCreated(HttpSessionEvent event) {
//raise();
}
    //销毁session
public void sessionDestroyed(HttpSessionEvent event) {
HttpSession session=event.getSession();
String sessionId=session.getId();
String loginName=(String)session.getAttribute("loginname");
online.remove(loginName);
}
//创建session
    public void createdSession(HttpServletRequest request) {
     HttpSession session=request.getSession();
     if(session!=null)
     {
     String sessionId=session.getId();
     String loginName=(String)session.getAttribute("loginname");
     String userName=new SXRecipient((String)session.getAttribute(IUser.USER_ID)).getRecipName();
     String userIp=(String)session.getAttribute("iv-remote-address");
     String departmentName="";
     Vector v=(Vector)request.getSession().getAttribute(IUser.USER_ORG_ID_NAME);
     if(v!=null)
     {
     departmentName=new SXRecipient(v.get(0)).getRecipName();
     }
     OnlineUser user=new OnlineUser();
     user.setLoginName(loginName);
     user.setUserIp(userIp);
     user.setLoginTime(new Date());
     user.setUserName(userName);
     user.setDepartmentName(departmentName);
         online.put(loginName, user);
     }
}
public static int getOnline() {
return online.size();
}
}

#7

我看你的代码里面  就没有session.setAttribute("userName","你的userName");   
你能取到userName的值才见鬼了

#8

之前username已经存到session里了，直接从session里取不行吗

#9

        //这句只是拿到userName,但session并没有存起来
	String userName=new SXRecipient((String)session.getAttribute(IUser.USER_ID)).getRecipName();
        
        //这样才存起来
        session.setAttribute("userName",userName); 

#10

不要用（String）这种强制类型装换   用toString方法试试

#11

引用 9 楼 李大白白的回复:

        //这句只是拿到userName,但session并没有存起来
	String userName=new SXRecipient((String)session.getAttribute(IUser.USER_ID)).getRecipName();
        
        //这样才存起来
        session.setAttribute("userName",userName); 

哦哦，这样啊，谢谢答复！

#12

引用 10 楼 qq_25388339的回复:

不要用（String）这种强制类型装换   用toString方法试试

这个应该不是大问题吧，因为别的数据这样写也可以取到啊

#13

引用 8 楼 qq_33466457的回复:

之前username已经存到session里了，直接从session里取不行吗

好像是没有存到session

#14

username你没有存到session里面，session.setAttribute("username",username);这才可以取值

#15

引用 1 楼 wlwlwlwl015 的回复:

(String)session.getAttribute("userName")取值为空?

你session是怎么存的，还有确保你session没被清除

 每次看到你这个头像都觉得很魔性....

#16

package com.business.filter;
import java.io.IOException;
import java.util.Date;
import java.util.Hashtable;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.business.login.Login;
import com.business.login.OnlineCounterListener;
import com.business.workflow.SXRecipient;
import com.dhcc.framework.core.IUser;
import com.dhcc.framework.log.po.UserOperationLog;
import com.dhcc.framework.log.service.UserOperationLogService;
import com.dhcc.framework.util.Facility;

public class LoginFilter implements Filter {

public void destroy() {

}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest)request;
        HttpServletResponse res = (HttpServletResponse)response;
        String username = "";
        String userIp="";
        username = Facility.procNull((String)req.getSession().getAttribute("iv-user"));
        userIp = Facility.procNull((String)req.getSession().getAttribute("iv-remote-address"));
        String gotoUrl = req.getRequestURI();
        
        if("".equals(username)){
         username = Facility.procNull(req.getHeader("iv-user")); 
         userIp = Facility.procNull(req.getHeader("iv-remote-address")); 
         if(noFilter(gotoUrl)){
         if("".equals(username)){
         String oaLogoutPage ="http://" + req.getServerName()+":"+req.getServerPort()+req.getContextPath()+"/loginout.jsp";
         res.sendRedirect(oaLogoutPage);
             return;
         }else{
         Hashtable ht=null;
try {
ht = Login.getV(username);
        req.getSession().setAttribute(IUser.USER_LOGINNAME,username);
        req.getSession().setAttribute(IUser.USER_ID, ht.get(IUser.USER_ID));
        req.getSession().setAttribute(IUser.USER_POSITION_ID_NAME, ht.get(IUser.USER_POSITION_ID_NAME));
        req.getSession().setAttribute(IUser.USER_ORG_ID_NAME, ht.get(IUser.USER_ORG_ID_NAME));
        req.getSession().setAttribute(IUser.USER_JOB, ht.get(IUser.USER_JOB));
        req.getSession().setAttribute(IUser.USER_MANAGER, ht.get(IUser.USER_MANAGER));
        req.getSession().setAttribute(IUser.USER_SYSRIGHT, ht.get(IUser.USER_SYSRIGHT));
        req.getSession().setAttribute(IUser.USER_SECRETLEVEL, ht.get(IUser.USER_SECRETLEVEL));
        req.getSession().setAttribute(IUser.USER_BASEINFOLIST, ht.get(IUser.USER_BASEINFOLIST));
    req.getSession().setAttribute("iv-user",username);
    req.getSession().setAttribute("iv-remote-address",userIp);
        new OnlineCounterListener().createdSession(req);
        //登录日志开始------------------>
        UserOperationLogService userOperationLogService = UserOperationLogService.getInstance();
        SXRecipient recipt = new SXRecipient(ht.get(IUser.USER_ID));
        String opdescription = "用户登录:"+recipt.getRecipientName()+"|"+username+"(登录名)";//描述
        UserOperationLog useroperationlog=new UserOperationLog("", recipt.getRecipId(), userIp, opdescription, new Date(), "login.jsp", UserOperationLog.TYPE_USERLOGIN,"no");
        useroperationlog.setProtoOperation(UserOperationLog.PROTO_QUERY);
        userOperationLogService.saveUserOperationLog(useroperationlog);
        //登录日志结束------------------>
} catch (Exception e) {
e.printStackTrace();
}
} 
         }
        }
     req.setCharacterEncoding("GBK");
        res.setCharacterEncoding("GBK");
        res.setContentType("text/html;charset=GBK");
        
        chain.doFilter(request, response);
        return;
}

public void init(FilterConfig arg0) throws ServletException {

}
    public boolean noFilter(String gotoUrl)//不拦截哪个页面写在下面
    {
     boolean filter=(gotoUrl.endsWith("html") || gotoUrl.endsWith("htm") || gotoUrl.endsWith("jsp") || (gotoUrl.indexOf("/mcc")>-1) ) 
&& !gotoUrl.endsWith("index.htm") 
&& !gotoUrl.endsWith("login.html")
&& !gotoUrl.endsWith("login/login.jsp")
&& !gotoUrl.endsWith("loginout.jsp");
     return filter;
    }
}
各位，这个已经把session放值了啊

#17

print（null==session.getAttribute("userName")），true就是没有传入，传入代码有问题，false就是有获取，断点看看里面内容

#18

引用 2 楼 qnmdcsdn 的回复:

//代码

贴代码注意一下格式，看的脑袋疼没看到在哪里放的，在哪取的

楼猪，乖，听话

#19

结果就是没有存进session?

#20

程序媛发帖回复率就是不一样

#21

引用 14 楼 qq_22158335 的回复:

username你没有存到session里面，session.setAttribute("username",username);这才可以取值

每次我都能吓尿

#22

引用 18 楼 我叫小菜菜的回复:

Quote: 引用 2 楼 qnmdcsdn 的回复:

//代码

贴代码注意一下格式，看的脑袋疼没看到在哪里放的，在哪取的

楼猪，乖，听话

哈哈，宝宝乖着呢

#23

引用 19 楼 qq_21873571的回复:

结果就是没有存进session?

结果是转码的问题

#24

引用 20 楼 Intboy的回复:

程序媛发帖回复率就是不一样

哈哈，羡慕嫉妒恨吧，以后你发帖也可以伪程序媛