springmvc下的文件上传比在struts2下简单多了，只需要几行代码就可以解决，但是在我的项目里却一直报：
HTTP Status 400 - Required request part 'uploadFile' is not present
仔细核对了上传参数名发现一直没错，最后发现是因为是没有xml的配置，在javaconfig里的配置没有根据容器要求的名字去命名bean。狗血。
错误的地方：
/*
* resolve the multipart file upload.
*/
@Bean
public MultipartResolver getResolver(){
//就是这里，我一开始用resolver命名，导致容易无法识别。
CommonsMultipartResolver resolver = new CommonsMultipartResolver();
multipartResolver.setDefaultEncoding("utf-8");
System.out.println("init resolver...");
return multipartResolver;
}
更正：
/*
* resolve the multipart file upload.
*/
@Bean
public MultipartResolver getResolver(){
//更改为multipartResolver即可。
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
multipartResolver.setDefaultEncoding("utf-8");
System.out.println("init resolver...");
return multipartResolver;
}
附上控制器的代码：
@Controller
public class UploadController {
@RequestMapping(value = "/testUpload", method = RequestMethod.POST)
public @ResponseBody Map<String, Object> uploadFile(
@RequestPart(name = "uploadFile") MultipartFile file) {
Map<String, Object> map = new HashMap<String, Object>();
File dir = new File(File.separator + "home" + File.separator + "senninha");
if (!dir.exists()) {
dir.mkdirs();
}
File saveFile = new File(dir + File.separator + file.getOriginalFilename());
BufferedOutputStream os = null;
try {
os = new BufferedOutputStream(new FileOutputStream(saveFile));
InputStream is = file.getInputStream();
byte[] b = new byte[1024];
int i = -1;
while((i = is.read(b)) != -1){
os.write(b,0,i);
}
map.put("code", 0);
map.put("info", "upload success!");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
if (os != null) {
os.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return map;
}
}
简单jsp页面：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<html>
<head>
<title>Upload File Request Page</title>
</head>
<body>
<form method="POST" action="testUpload" enctype="multipart/form-data">
File to upload: <input type="file" name="uploadFile" id = "uploadFile" class = "uploadFile">
<input type="submit" value="Upload"> Press here to upload the file!
</form>
</body>
</html>
ok可以上传啦。
