Question

我知道这是一个很多时间问题。我已经完成了所有答案，但找不到可行的解决方案。我正在尝试下载pdf文件，jsp中的代码块如下所示

但数据被刷新到浏览器窗口，如下所示

％PDF-1.4％áéëÓ20 obj＆lt;＆gt; endobj 3 0 obj＆lt;＆gt; / XObject＆lt;＆gt; / Font＆lt;＆gt; ＆GT;＆GT; / MediaBox [0 0 612 792] / Annots [＆lt;＆gt; ＆GT;＆GT; ＆LT;＆GT; ＆GT;＆GT; ＆LT;＆GT; ＆GT;＆GT; ＆LT;＆GT; ＆GT;＆GT; ＆LT;＆GT; ＆gt;＆gt;] /内容16 0 R＆gt;＆gt; endobj 16 0 obj＆lt;＆gt;流xœμ]ÛŽ$ 9}Ÿ¯¨×ŽðUBH，ËðÞB，h-ÿ-HgUwF

请帮助我。

<%

java.io.File file=new java.io.File("C:\\down\\personal\\Card.pdf");
java.io.InputStream in = new java.io.BufferedInputStream(new java.io.FileInputStream(file));

response.setHeader("Content-Disposition", "attachment; filename=empfile.pdf");
response.setContentType("application/pdf");

org.apache.commons.io.IOUtils.copy(in, response.getOutputStream());
response.flushBuffer();

%>

也低于错误

12：57：32,068 ERROR [org.apache.catalina.core.ContainerBase。[jboss.web]。[default-host]。[/ business]。[spring]]（http- / 127.0.0.1:8080 -7）JBWEB000236：servle的Servlet.service（） spring抛出异常：java.lang.IllegalStateException：已经为此响应调用了JBWEB000028：getOutputStream（）

Answer 1

这就是我试过的

@RequestMapping（value = {＆＃34; / create＆＃34;，＆＃34; / edit＆＃34;}，params =＆＃34; Action = go1＆＃34;，produce = MediaType.APPLICATION_OCTET_STREAM_VALUE） @ResponseBody public FileSystemResource getFile（HttpServletRequest request，HttpServletResponse response，ModelMap modelMap）{ java.io.File file = new java.io.File（＆＃34; C：\ RAHUL \ personal \ HDFC Bank Credit Card.pdf＆＃34;）; 返回新的FileSystemResource（文件）; }

@RequestMapping(value = {"/create","/edit"}, params = "Action=go2")
public ResponseEntity<InputStreamResource> downloadStuff(HttpServletRequest request)
                                                                  throws IOException {
    java.io.File file=new java.io.File("C:\\RAHUL\\personal\\HDFC Bank Credit Card.pdf");
    HttpHeaders respHeaders = new HttpHeaders();

    respHeaders.setContentType(MediaType.APPLICATION_OCTET_STREAM);
    respHeaders.setContentLength(12345678);
    respHeaders.setContentDispositionFormData("attachment", "fileNameIwant.pdf");

    InputStreamResource isr = new InputStreamResource(new FileInputStream(file));
    return new ResponseEntity<InputStreamResource>(isr, respHeaders, HttpStatus.OK);
}

@RequestMapping(value = {"/create","/edit"}, params = "Action=go3",method = RequestMethod.GET)
public void download2(HttpServletResponse response,HttpServletRequest request) {

    try {
        java.io.File file=new java.io.File("C:\\RAHUL\\personal\\HDFC Bank Credit Card.pdf");
        InputStream in = new BufferedInputStream(new FileInputStream(file));

         response.setHeader("Content-Disposition", "attachment; filename=empfile.pdf");
        response.setContentType("application/pdf");

        request.setAttribute("override","Y");
         org.apache.commons.io.IOUtils.copy(in, response.getOutputStream());
        response.flushBuffer();
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

浏览器刷新下载到浏览器窗口

1 个答案: