java.lang.NullPointerException: charsetName

Question

就是写了一个监听器，放在程序里，然后在运行的时候，要显示登陆页面，但是登陆页面没有显示出来，控制台到是报出上面的错误。
但是在程序里 我根本就没有用到charsetName。
请各位帮帮忙！
在线等！

Answer 1

你应该把错误信息贴多一点，比如root cause

Answer 2

这是错误报告：java.lang.NullPointerException: charsetName
at java.lang.String.<init>(Unknown Source)
at java.lang.String.<init>(Unknown Source)
at org.apache.catalina.connector.Request.setCharacterEncoding(Request.java:1434)
at org.apache.catalina.connector.RequestFacade.setCharacterEncoding(RequestFacade.java:305)
at com.crinode.mbank.pmgt.basedata.ReqFilter.doFilter(ReqFilter.java:64)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
这是我的监听器：
 

Answer 3

这是监听器！public class ReqFilter extends HttpServlet implements Filter {
private String menuServiceName;
private String menuUriServiceName;
private String oplogServiceName;
private String extension;
private String rolePowerServiceName;
private String invalidUri;
private String login;
private String logout;
private String encoding;

private MenuserviceImpl menuserviceimpl;
private MenuUriserviceImpl menuUriserviceimpl;
private OpLogserviceImpl oplogserviceimpl;
private RolePowerserviceImpl rolePowerserviceimpl;
    private FilterConfig filterConfig;
    private HashMap userMap;
    
    //Handle the passed-in FilterConfig
    public void init(FilterConfig filterConfig) throws ServletException {
        this.filterConfig = filterConfig;
        this.encoding = filterConfig.getInitParameter("CharacterEncoding");
        this.extension = filterConfig.getInitParameter("extension");
        this.invalidUri = filterConfig.getInitParameter("invalidUri");
        this.menuServiceName = filterConfig.getInitParameter("menuServiceName");
        this.menuUriServiceName = filterConfig.getInitParameter("menuUriServiceName");
        this.oplogServiceName = filterConfig.getInitParameter("oplogServiceName");
        this.rolePowerServiceName = filterConfig.getInitParameter("rolePowerServiceName");
        this.login = filterConfig.getInitParameter("login");
        this.logout = filterConfig.getInitParameter("logout");
    }
    
    //Process the request/response pair
    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain filterChain) {
        try {
        
         request.setCharacterEncoding(this.encoding);
        
         if (userMap==null)
         {//初始化服务
         ServletContext sc = ((HttpServletRequest)request).getSession().getServletContext();
         WebApplicationContext wc = WebApplicationContextUtils.getWebApplicationContext(sc);
         this.menuserviceimpl = (MenuserviceImpl)wc.getBean(this.menuServiceName);
         this.menuUriserviceimpl = (MenuUriserviceImpl)wc.getBean(this.menuUriServiceName);
         this.rolePowerserviceimpl = (RolePowerserviceImpl)wc.getBean(this.rolePowerServiceName);
         this.oplogserviceimpl = (OpLogserviceImpl)wc.getBean(this.oplogServiceName);
         }
        
         String uri = ((HttpServletRequest)request).getRequestURI();
         String path = ((HttpServletRequest)request).getRequestURI();
         String visitPath = null;
        
         if(uri!=null && uri.indexOf(extension)!=-1)
         {
         visitPath = path.substring(path.lastIndexOf("/")+1);
         }
        
         //如果有参数，则过滤掉参数
         if (visitPath!=null && visitPath.indexOf("?")!=-1)
         visitPath = visitPath.substring(0,visitPath.indexOf("?"));
         System.out.println(new Timestamp(System.currentTimeMillis()).toString()+":-------------visistPath:"+visitPath);
         //过滤action
         boolean isLogin = false;
         boolean isLogout = false;
        
         if(uri!=null && uri.indexOf(this.login)!=-1 )
         isLogin = true;
         if(uri!=null && uri.indexOf(this.logout)!=-1)
         isLogout = true;
        
         Long submid = new Long(-1);//-1表示列表菜单
         Long mid = new Long(-1);
         MenuUri tmpUri = null;
     Menu tmpMenu = null;
    
     HttpSession session = ((HttpServletRequest)request).getSession();
     String name = request.getParameter("name");
     User user = (User)session.getAttribute("user");
     OpLog log = new OpLog();
    
     boolean haveLogin = false;
         List userlist = LoginUseres.getInstance().getUsers();
         if(user==null && name!=null)
         {
         for(int i=0;i<userlist.size();i++)
         {
         User tmpUser = (User)userlist.get(i);
         System.out.println("============ user:"+tmpUser.getName());
         System.out.println("============ user:"+name);
         if(tmpUser.getName().equals(name))
         haveLogin = true;
         }
         }    
         if (!isLogin && uri!=null && uri.indexOf(extension)!=-1)
   }

Answer 4

      {         if (user!=null)
         {//用户登录成功，记录日志
         String userAction = "登出";
         tmpUri = (MenuUri)this.menuUriserviceimpl.findByUri(visitPath,ConstDef.STATUS_VALID);
         tmpMenu = (Menu)this.menuserviceimpl.findByUri(visitPath,ConstDef.STATUS_VALID);
       
         submid = new Long(-1);
         if(tmpUri!=null)
         {
         userAction = tmpUri.getName();
         submid = tmpUri.getId();
         mid = tmpUri.getMid();
         }
         else if(tmpMenu!=null)
         {
         userAction = tmpMenu.getName();
         mid = tmpMenu.getId();
         }
         log.setAction(userAction);
         log.setContent("");
         log.setContentid(user.getContentid());
         log.setCustomer("");
         log.setCustomerid(user.getCustomerid());
         log.setProduct("");
         log.setProductid(user.getProductid());
         log.setTransfee("");
         log.setTransfeeid(user.getTransfeeid());
         log.setTranslog("");
         log.setTranslogid(user.getTranslogid());
         log.setVerinstruct("");
         log.setVerinstructid(user.getVerinstructid());
         log.setMenu(userAction);
         log.setOptime(new java.sql.Timestamp(System.currentTimeMillis()));
         log.setOrg(user.getOrg().getName());
         log.setOrgid(user.getOrgid());
         log.setUserid(user.getId());
         log.setUsername(user.getName());
         log.setRole(user.getRole().getName());
         log.setHost(request.getRemoteHost());
         log.setRoleid(user.getRoleid());
        
         List powerList = this.rolePowerserviceimpl.findByRidSubmid(user.getRoleid(), mid, submid);
        
         if(powerList!=null && powerList.size()>0 || isLogout)
         log.setResp("ok");
         else
         log.setResp("X");
         this.oplogserviceimpl.save(log);
        
                 if ("X".equals(log.getResp()))
             ((HttpServletResponse)response).sendRedirect(this.invalidUri);
         }
         }else if (isLogin && haveLogin)
         {
         log = new OpLog();
     String userAction = "登陆";
     if(tmpUri!=null)
     userAction = tmpUri.getName();
     else if(tmpMenu!=null)
     userAction = tmpMenu.getName();
     log.setAction(userAction);
     log.setContent("");
     log.setContentid(new Long(0));
     log.setCustomer("");
     log.setCustomerid(new Long(0));
     log.setProduct("");
     log.setProductid(new Long(0));
     log.setTransfee("");
     log.setTransfeeid(new Long(0));
     log.setTranslog("");
     log.setTranslogid(new Long(0));
     log.setVerinstruct("");
     log.setVerinstructid(new Long(0));
     log.setMenu(userAction);
     log.setOptime(new java.sql.Timestamp(System.currentTimeMillis()));
     log.setOrg("");
     log.setOrgid(new Long(0));
     log.setUserid(new Long(0));
     log.setUsername(name);
     log.setRole("");
     log.setRoleid(new Long(0));
     log.setHost(request.getRemoteHost());
     log.setResp("X");
     this.oplogserviceimpl.save(log);
         }         filterChain.doFilter(request, response);
        
         if (isLogin)
         {
         session = ((HttpServletRequest)request).getSession();
         user = (User)session.getAttribute("user");
         if (user!=null)
         {//用户登录成功，记录日志
         String userAction = "登陆";
         if(tmpUri!=null)
         userAction = tmpUri.getName();
         else if(tmpMenu!=null)
         userAction = tmpMenu.getName();
         log.setAction(userAction);
         log.setContent("");
         log.setContentid(user.getContentid());
         log.setCustomer("");
         log.setCustomerid(user.getCustomerid());
         log.setProduct("");
         log.setProductid(user.getProductid());
         log.setTransfee("");
         log.setTransfeeid(user.getTransfeeid());
         log.setTranslog("");
         log.setTranslogid(user.getTranslogid());
         log.setVerinstruct("");
         log.setVerinstructid(user.getVerinstructid());
         log.setMenu(userAction);
         log.setOptime(new java.sql.Timestamp(System.currentTimeMillis()));
         log.setOrg(user.getOrg().getName());
         log.setOrgid(user.getOrgid());
         log.setUserid(user.getId());
         log.setUsername(user.getName());
         log.setRole(user.getRole().getName());
         log.setRoleid(user.getRoleid());
         log.setHost(request.getRemoteHost());
         log.setResp("ok");
         this.oplogserviceimpl.save(log);
         }
         RolePower power = null;
         }
        
        } catch (ServletException sx) {
         sx.printStackTrace();
            filterConfig.getServletContext().log(sx.getMessage());
        } catch (IOException iox) {
            filterConfig.getServletContext().log(iox.getMessage());
        } catch (Exception ex) {
         ex.printStackTrace();
        }
    }
    
    //Clean up resources
    public void destroy() {
    }
} 

Answer 5

filterConfig.getInitParameter("CharacterEncoding")是null吧

Answer 6

用 Ctrl+H  一下哈！ charsetName   没有理由的！