正文
文件上传流式处理commons-fileupload
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1. 从请求中获取MultipartFile
@RequestMapping(value="/upload", method=RequestMethod.POST)
public @ResponseBody String handleFileUpload(
@RequestParam("file") MultipartFile file
) throws IOException{
2. 文件流处理
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream; import org.apache.commons.fileupload.util.Streams;
import org.apache.commons.io.IOUtils;
import org.springframework.web.multipart.MultipartFile; public class UploadFileUtil {
/**
* 使用相同的名称
* @param file
* @param filePath
* @return
*/
public static String handleFileUpload(MultipartFile file,String filePath){
try {
if(!file.isEmpty()){
String name=file.getOriginalFilename();
InputStream inpustream=file.getInputStream();
FileOutputStream fos = new FileOutputStream(filePath+File.separator+name);
Streams.copy(inpustream, fos, true);
}else{
return "can not upload this file,because it is empty!";
}
} catch (IOException e) {
return "failed to upload this file,because Stream interrupt unexpectedly";
}
return "upload file sucess";
} /**
* 重命名文件，包含后缀
* @param file
* @param filePath
* @param fileName
* @return
*/
public static String handleFileUpload(MultipartFile file,String filePath,String fileName){
try {
if(!file.isEmpty()){
InputStream inpustream=file.getInputStream();
FileOutputStream fos = new FileOutputStream(filePath+File.separator+fileName);
Streams.copy(inpustream, fos, true);
}else{
return "can not upload this file,because it is empty!";
}
} catch (IOException e) {
return "failed to upload this file,because Stream interrupt unexpectedly";
}
return "upload file sucess";
} /**
*Copy bytes from a large (over 2GB) file with same filename
* @param file
* @param filePath
* @param fileName
* @return
*/ public static String handleLargeFileUpload(MultipartFile file,String filePath){
try {
if(!file.isEmpty()){
String name=file.getOriginalFilename();
InputStream inpustream=file.getInputStream();
FileOutputStream fos = new FileOutputStream(filePath+File.separator+name);
IOUtils.copyLarge(inpustream, fos);
if(inpustream!=null){
inpustream.close();
}
if(fos!=null){
fos.close();
}
}else{
return "can not upload this file,because it is empty!";
}
} catch (IOException e) {
return "failed to upload this file,because Stream interrupt unexpectedly";
}
return "upload file sucess";
} /**
*Copy bytes from a large (over 2GB) file with rename file
* @param file
* @param filePath
* @param fileName
* @return
*/ public static String handleLargeFileUpload(MultipartFile file,String filePath,String fileName){
try {
if(!file.isEmpty()){
InputStream inpustream=file.getInputStream();
FileOutputStream fos = new FileOutputStream(filePath+File.separator+fileName);
IOUtils.copyLarge(inpustream, fos);
if(inpustream!=null){
inpustream.close();
}
if(fos!=null){
fos.close();
}
}else{
return "can not upload this file,because it is empty!";
}
} catch (IOException e) {
return "failed to upload this file,because Stream interrupt unexpectedly";
}
return "upload file sucess";
} }
