MultipartFile转File
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2022-05-15 09:54:59
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前端传过来MultipartFile,后端转为file后删除本地缓存文件
后台接收的需要转换为一个File类型的
接受前端文件:
MultipartFile file111 = ((MultipartHttpServletRequest) httpServletRequest).getFile("前端传得文件名");
转换:
package com.hswg.jstxb.issued.common.FileUtil;/**
* Created by TongGuoBo on 2019/6/19.
*/
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
/**
* @ClassName MultipartFileToFile
* @Description MultipartFile转fie
* @Author TongGuoBo
* @Date 2019/6/19 13:48
**/
public class MultipartFileToFile {
/**
* MultipartFile 转 File
*
* @param file
* @throws Exception
*/
public static File multipartFileToFile(MultipartFile file) throws Exception {
File toFile = null;
if (file.equals("") || file.getSize() <= 0) {
file = null;
} else {
InputStream ins = null;
ins = file.getInputStream();
toFile = new File(file.getOriginalFilename());
inputStreamToFile(ins, toFile);
ins.close();
}
return toFile;
}
//获取流文件
private static void inputStreamToFile(InputStream ins, File file) {
try {
OutputStream os = new FileOutputStream(file);
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {
os.write(buffer, 0, bytesRead);
}
os.close();
ins.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 删除本地临时文件
* @param file
*/
public static void delteTempFile(File file) {
if (file != null) {
File del = new File(file.toURI());
del.delete();
}
}
}