base64字符串转MultipartFile
解决方法：
1、MultipartFile file=Base64DecodeMultipartFile.base64Convert(facebase);
其中facebase是base64字符串
2、Base64DecodeMultipartFile的源码如下：
import org.springframework.web.multipart.MultipartFile;
import sun.misc.BASE64Decoder;
import java.io.*;
public class Base64DecodeMultipartFile implements MultipartFile {
private final byte[] imgContent;
private final String header;
public Base64DecodeMultipartFile(byte[] imgContent, String header) {
this.imgContent = imgContent;
this.header = header.split(";")[0];
}
@Override
public String getName() {
return System.currentTimeMillis() + Math.random() + "." + header.split("/")[1];
}
@Override
public String getOriginalFilename() {
return System.currentTimeMillis() + (int)Math.random() * 10000 + "." + header.split("/")[1];
}
@Override
public String getContentType() {
return header.split(":")[1];
}
@Override
public boolean isEmpty() {
return imgContent == null || imgContent.length == 0;
}
@Override
public long getSize() {
return imgContent.length;
}
@Override
public byte[] getBytes() throws IOException {
return imgContent;
}
@Override
public InputStream getInputStream() throws IOException {
return new ByteArrayInputStream(imgContent);
}
@Override
public void transferTo(File dest) throws IOException, IllegalStateException {
new FileOutputStream(dest).write(imgContent);
}
/**
* base64转multipartFile
*/
public static MultipartFile base64Convert(String base64) {
String head = "data:image/jpeg;base64";
//String[] baseStrs = base64.split(",");
BASE64Decoder decoder = new BASE64Decoder();
byte[] b = new byte[0];
try {
b = decoder.decodeBuffer(base64);
} catch (IOException e) {
e.printStackTrace();
}
for (int i = 0; i < b.length; ++i) {
if (b[i] < 0) {
b[i] += 256;
}
}
return new Base64DecodeMultipartFile(b, head);
}
}