Struts 2的外部servlet

-2

如何在Struts2，Hibernate，Spring Security的項目中使用外部servlet ，因爲我必須顯示一些圖表和Pie with JS。Struts 2的外部servlet

問題是與我的會話工廠我不「知道我怎麼可以把它在我的servlet 當我把我的沙發DAO它給我

java.lang.NullPointerException 
at com.charting.PieChartServlet.doPost(PieChartServlet.java:70) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) 
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093) 
    at org.apache.struts2.dispatcher.ng.filter.StrutsExecuteFilter.doFilter(StrutsExecuteFilter.java:90) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) 
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:96) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) 
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareFilter.doFilter(StrutsPrepareFilter.java:91) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118) 
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter.doFilter(DefaultLoginPageGeneratingFilter.java:91) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192) 
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) 
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237) 
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) 
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360) 
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) 
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712) 
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) 
    at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211) 
    at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) 
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) 
    at org.mortbay.jetty.Server.handle(Server.java:313) 
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506) 
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:830) 
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514) 
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) 
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) 
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396) 
    at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)

PieChartServlet：

@Controller 
public class PieChartServlet extends HttpServlet { 
    private static final long serialVersionUID = 1L;  
    @Autowired 
    private CheckAction checkAction; 
    private CheckManager checkManager 
    private Check check; 
    private JFreeChart chart; 

    public PieChartServlet() { 

    } 

    @Override 
    public void init() throws ServletException { 

     checkAction = new CheckAction(); 
    } 


    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
     String uri = request.getRequestURI(); 
     int i = uri.lastIndexOf('/') + 1; 
     int j = uri.lastIndexOf('.'); 
     String key = uri.substring(i, j); 
     String view = "/error.jsp"; 
     String fc= request.getParameter("fc"); 
     System.out.println(request.getParameter("fc") +"**********************"); 
     check= checkManager.listerCheck(fc); 
     if (key.equals("AfficherPie")) { 



      DefaultPieDataset donnees=new DefaultPieDataset(); 
      donnees.setValue("OK",19); 
      donnees.setValue("Not Ok",5); 
      donnees.setValue("NA",5); 
      donnees.setValue("NR",5); 
       // créer le graphique 
      chart = ChartFactory.createPieChart3D(
         "Reporting ", //titre 
          donnees,    // données à afficher 
          true,     // afficher la légende 
          true, 
          true 
        ); 

NumberFormat.getNumberInstance(), NumberFormat.getPercentInstance())); 
       final PiePlot plot = (PiePlot) chart.getPlot(); 
       plot.setBackgroundPaint(Color.white); 
       plot.setCircular(true); 
       plot.setLabelGenerator(new StandardPieSectionLabelGenerator(
        "{0} = {2}", NumberFormat.getNumberInstance(), NumberFormat.getPercentInstance() 
       )); 
       plot.setNoDataMessage("No data available"); 
       plot.setDrawingSupplier(new ChartDrawingSupplier()); 
       chart.setBorderVisible(true); 



       if (chart != null) { 
        int width = 600; 
        int height = 400; 
        response.setContentType("image/jpeg"); 
        //response.flushBuffer(); 

        OutputStream out = response.getOutputStream(); 
        ChartUtilities.writeChartAsJPEG(out, chart, width, height); 
       } 

     } 

     request.getRequestDispatcher(view).forward(request, response); 
    } 
    public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException { 
     doGet(request, response); 
    } 

}

java.lang.NullPointerException在check= checkManager.listerCheck(fc);即使參數不爲空，我已經使用此方法wit豪特任何問題

堆棧跟蹤：

java.lang.NullPointerException 
    at 
    com.ji.checkImpl.CheckDaoImpl.listerCheck(CheckDaoImpl.java:63) 
    at com.ji.checkImpl.CheckManagerImpl.listerCheck(CheckManagerImpl.java:52) 
    at com.ji.PieChartServlet.doGet(PieChartServlet.java:78) 
    at com.ji.PieChartServlet.doPost(PieChartServlet.java:125) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) 
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093) 
    at org.apache.struts2.dispatcher.ng.filter.StrutsExecuteFilter.doFilter(StrutsExecuteFilter.java:72) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) 
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:86) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) 
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareFilter.doFilter(StrutsPrepareFilter.java:91) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118) 
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter.doFilter(DefaultLoginPageGeneratingFilter.java:91) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) 
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192) 
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) 
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237) 
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167) 
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084) 
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360) 
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) 
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) 
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712) 
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) 
    at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211) 
    at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) 
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) 
    at org.mortbay.jetty.Server.handle(Server.java:313) 
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506) 
    at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:844) 
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644) 
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) 
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) 
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396) 
    at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)

來源

2014-09-05 name123456789

後servlet的代碼，以及如何才能建立會話工廠。 – 2014-09-05 17:01:09

okk @RomanC tnx尋求幫助 – name123456789 2014-09-07 22:13:41

問題是與你的控制器，尚未有線的依賴。要確定導線的相關性，請確保CheckManager是spring bean，即如果您使用基於註釋的配置或在spring xml配置中使用bean標記，則註釋爲@Component。然後在該屬性上添加@Autowired註釋。

@Autowired 
private CheckManager checkManager; 
public setCheckManager(CheckManager checkManager){ 
    this.checkManager = checkManager; 
}

要單獨使用Servlet中Struts 2框架，你應該在你的struts.xml排除的servlet使用的配置設置的過濾器映射。

<constant name="struts.action.excludePattern" value="/piechart/?.*"/>

servlet映射在web.xml：

<servlet> 
    <servlet-name>piechart</servlet-name> 
    <servlet-class>com.charting.PieChartServlet</servlet-class> 
</servlet> 
<servlet-mapping> 
    <servlet-name>piechart</servlet-name> 
    <url-pattern>/piechart/*</url-pattern> 
</servlet-mapping>

來源

2014-09-08 08:48:31

它沒有任何工作......但請如何在servlet中調用SessionFactory我認爲彈簧安全性的問題？ – name123456789 2014-09-08 09:04:16

會話工廠可以以與檢查管理器相同的方式自動裝配。 – 2014-09-08 09:09:05

我有同樣的問題nullPointer。！ – name123456789 2014-09-08 09:14:28

Struts 2的外部servlet

回答

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