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    ChartDirector用了jsp過濾器后不出圖

    發(fā)表于2020-05-26 回復(fù)：1 查看：3538  |  

    一、jsp代碼

    String chart1URL = c.makeSession(request, "chart1");

    <img src='<%=response.encodeURL("getchart.jsp?"+chart1URL)%>'   usemap="#map1" border="0">

    二、過濾器代碼

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

    HttpServletRequest req=(HttpServletRequest)request;

    HttpServletResponse resp=(HttpServletResponse)response;

    HttpSession session=req.getSession(true);

    resp.setContentType("text/html");

    resp.setCharacterEncoding("UTF-8");

    PrintWriter out=resp.getWriter();

    String request_uri=req.getRequestURI();

    String ctxPath=req.getContextPath();

    String uri=request_uri.substring(ctxPath.length());

    if(uri.contains("Login.jsp")||uri.contains("Login")||uri.contains("getchart")||uri.contains(".png")||uri.contains(".jpg")||uri.contains(".css")||uri.contains(".js")||uri.contains("testchart.jsp")) {

    chain.doFilter(request, response);

    }else {

    if(null !=session.getAttribute("user")) {

    chain.doFilter(request, response);

    }else {

    out.println("您還沒有登錄，請先登錄！3秒后回到登錄頁面。");

    resp.setHeader("refresh","3;url="+ctxPath+"/Login.jsp");

    return;

    }

    }

    }

    三、問題

    無過濾器，顯示正常，上了過濾器后網(wǎng)頁不出圖。


    0個回答

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