Spring portlet以字符串形式获得jsp响应

Question

Spring portlet JSP，制作ajax请求并在控制器中尝试获取jsp页面，以便我可以传递和生成pdf输出。

但问题是没有得到任何字符串数据，但HTML内容jsp页面上的返回请检查代码follwoing

@Controller("exportSummaryController") 
@RequestMapping(value = "VIEW") 
public class ExportSummaryController implements PortletConfigAware { 

    @ResourceMapping("exportAccRequest") 
    public void accountRollupAction(@RequestParam("accNum") String accNum, 
     @RequestParam("sourceId") String sourceId, @RequestParam("serviceId") String serviceId, 
     @RequestParam("summaryExport") String strExport, ResourceRequest request, ResourceResponse response) throws Exception { 

     //processing data 

     ResourceResponseWrapper responseWrapper = new ResourceResponseWrapper(response) { 
      private final StringWriter sw = new StringWriter(); 

      @Override 
      public PrintWriter getWriter() throws IOException { 
       return new PrintWriter(sw); 
      } 

      @Override 
    public OutputStream getPortletOutputStream() throws IOException { 
       return(new StringOutputStream(sw)); 
      } 
      @Override 
      public String toString() { 
       return sw.toString(); 
      } 

     }; 

     portletConfig.getPortletContext().getRequestDispatcher("/WEB-INF/jsp/account_summary.jsp").include(request, responseWrapper); 
     String content = responseWrapper.toString(); 
     System.out.println("Output : " + content); // here i found empty output on command line but output is returned to jsp page. 
    }  
} 

public class StringOutputStream extends OutputStream { 
     private StringWriter stringWriter; 

     public StringOutputStream(StringWriter stringWriter) { 
      this.stringWriter = stringWriter; 
     } 

     public void write(int c) { 
      stringWriter.write(c); 
     } 
    } 

Answer 1

在你的代码的输出仅由一个OutputStream cosumed。

试试这个，

ResourceResponseWrapper responseWrapper = new ResourceResponseWrapper(response) { 
     private final StringWriter sw = new StringWriter(); 

     @Override 
     public PrintWriter getWriter() throws IOException { 
      return new PrintWriter(sw){ 

       @Override 
       public void write(String s, int off, int len) 
       { 
        try 
        { sw.write(s, off, len); 
         response.getWriter().write(s, off, len); 
        } 
        catch (IOException e) 
        { 
         e.printStackTrace(); 
        } 
       } 
      }; 
     } 


     @Override 
     public String toString() { 
      return sw.toString(); 
     } 

    };