问题描述
前台请求一个ajax,导出一个word,如果导出成功则返回一个成功标志,代码如下,为什么执行到红色的哪一行就报错了呢,错误如下:严重: Servlet.service() for servlet action threw exceptionjava.lang.IllegalStateException: getOutputStream() has already been called for this response 代码如下:if("AJAXEXPORTWORD".equals(actiontype)){ File file =(File)rowSet.getVpo(); String uuid = UUID.randomUUID().toString() + ".doc"; response.reset(); response.setContentType("application/msword;charset=GBK"); response.setHeader("Content-Disposition", (new StringBuilder( "attachment; filename=")).append(uuid).toString()); BufferedOutputStream bsout = new BufferedOutputStream(response.getOutputStream()); try { IOUtils.write(FileUtils.readFileToByteArray(file), bsout); bsout.flush(); } finally { IOUtils.closeQuietly(bsout); } PrintWriter out = response.getWriter(); out.print(getJsonFromKeyValue(new String[]{"result"},new String[]{"1"})); return null; } 如果这样写不对请指正或者有更好的写法吗
解决方案
BufferedOutputStream bsout = new BufferedOutputStream(response.getOutputStream()); 这里说明已经向浏览器输出流了, PrintWriter out = response.getWriter(); 这里也是向浏览器里写入字符,所以是不能同时调用的。java.lang.IllegalStateException: getOutputStream() has already been called for this response这句话已经说明了问题了,就是你已经调用了getOutputStream()
解决方案二:
有个比较简单的方法,直接定位到一个新的页面,在新页面导出,这样你就不用管它的返回标记了。
解决方案三:
IOUtils.closeQuietly(bsout); 这个colse导致的, 你把它向后移就不会报错了 试试看