使用JSP springMVC框架做的web平台,在做文件下載的時候,遇到這樣的問題:
文件下載部分的代碼是這樣寫的:
@RequestMapping("/ModelDownload{id}")
public String ModelDownLoad(@PathVariable int id, HttpServletResponse response){
String fileName = "download.txt";
String filePath = "D:\";
String modelName = new ModelService().getModelById(id).getModelName();
System.out.println(modelName);
response.reset();
response.setContentType("application/x-download");
response.addHeader("Content-Disposition", "attachment;filename="+fileName);//重新设置响应头文件字段,设置下载文件的文件名
OutputStream OutputStream = null;
FileInputStream fileInputStream = null;
try {
OutputStream = response.getOutputStream();
fileInputStream = new FileInputStream(filePath+fileName);
byte[] buffer = new byte[1024*10];//设置文件大小上限为10M
for (int read; (read = fileInputStream.read(buffer)) != -1;){
OutputStream.write(buffer,0,read);
}
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println(e.toString());
}
finally{
try {
fileInputStream.close();
OutputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return "success";
}
百度了很多,幾乎都是說在JSP上使用out對象進行clear()和close()操作的,根本沒有針對後台操作遇到的相同問題的解決方案,求大神指導。
問題解決:把方法的返回類型改為void即可,
猜測問題的原因可能是當返回類型為String的時候,點擊下載按鈕,彈出下載頁面,這時候後台代碼被中斷,沒有就行close() ;