Weblogic migration from 6.1 to 8.1

Question

Hi
          Please help. I have already try all methods but still cannot find the way to solve this.
          I am migrating from Weblogic Server 6.1 to 8.1. I faced a problem of the textbox displaying a NULL value. This is because of the declaration in the JSP where the code is like below:
          <b>String sVariable = null;</b>
          Instead of changing the above code to an empty String like below:
          <b>String sVariable = "";</b>
          I am writing a filter that will intercept the response in order to replace all occurrences of the text "VALUENULL" to "VALUE=""" .
          I have already created a HTTPServletResponseWrapper and the filter works well if it is only replacing the text. But the problem is mine is a web application so there is definitely images like gif files, etc.... and it will result in the images cannot be displayed correctly.
          What is the problem in my codes below and what do I need to do to render the images correctly?
          public void doFilter(final ServletRequest request, final ServletResponse response, FilterChain chain) throws IOException, ServletException {       
          OutputStream out = response.getOutputStream();
          GenericResponseWrapper wrapper = new GenericResponseWrapper((HttpServletResponse) response);
          chain.doFilter(request, wrapper);
          String sResponse=new String(wrapper.getData()).replaceAll("value=NULL", "value=\"\"");
          response.setContentLength(sResponse.getBytes().length);
          out.write(sResponse.getBytes());
          out.close();
          Thanks so much for your help.
          Regards
          Glnnca

Answer 1

Hi,
          To know more about migration from 6.1 to 8.1
          click
          Prasanna Yalam