Java Spring MVC 上传下载文件配置及controller方法详解

下载：

1.在spring-mvc中配置(用于100M以下的文件下载)

下载文件代码

@RequestMapping("/file/{name.rp}")
public ResponseEntity fileDownLoad(@PathVariable("name.rp")String name, HttpServletRequest request,HttpServletResponse response) {
// @PathVariable String name,
// @RequestParam("name")String name,
// System.out.println(""+name);
// System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
ResponseEntity re = null;
try {
/**
* css,js,json,gif,png,bmp,jpg,ico,doc,docx,xls,xlsx,txt,swf,pdf
* **/
//下载防止静态加载干扰
Feelutile f=new Feelutile();
name=f.getfileformat(name);
String pathString="C:\\tempDirectory\\"+name; 
File file=new File(pathString);
HttpHeaders headers=new HttpHeaders();
//String filename=URLEncoder.encode(name, "UTF-8");//为了解决中文名称乱码问题 
String filename=new String(name.getBytes("utf-8"),"utf-8");
byte[] by=FileUtils.readFileToByteArray(file);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
//URLEncoder.encode(filename, "UTF-8")
headers.setContentDispositionFormData("attachment",filename);
headers.setContentLength(by.length);
re=new ResponseEntity(by, headers, HttpStatus.CREATED);
} catch (Exception e) {
e.printStackTrace();
try {
request.getRequestDispatcher("/error/404.jsp").forward(request, response);
} catch (ServletException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
return re;
}

上传文件:

1在spring-mvc中配置

UTF-8


1048576000


40960

在controller中代码如下

@RequestMapping(value="/upload", method = RequestMethod.POST)
@ResponseBody
public Json upload(Doc doc, @RequestParam("uploadFile") CommonsMultipartFile file) {
Json j = new Json();
try {
String realpath = this.servletContext.getRealPath("/upload"); 
String uploadFileFileName = file.getOriginalFilename(); 
String uploadFileFileNameWithoutSpace = uploadFileFileName.replaceAll(" ", ""); 
String fileType = uploadFileFileNameWithoutSpace.substring(uploadFileFileNameWithoutSpace.lastIndexOf("."));
File targetFile = new File(realpath+File.separator, uploadFileFileNameWithoutSpace);
if (targetFile.exists()) {
targetFile.delete();
}
file.getFileItem().write(targetFile); 
docService.upload(doc,uploadFileFileNameWithoutSpace);
j.setSuccess(true);
j.setMsg("Upload manual successfully");
}catch (Exception e) {
logger.error(ExceptionUtil.getExceptionMessage(e));
j.setMsg("Upload manual unsuccessfully");
}
return j;
}

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