java將base64圖片轉爲file上傳到服務器

首先後臺先創建工具類

package org.adv.fw.modular.util;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import org.springframework.web.multipart.MultipartFile;

public class BASE64DecodedMultipartFile implements MultipartFile {
private final byte[] imgContent;
private final String header;

public BASE64DecodedMultipartFile(byte[] imgContent, String header) {
    this.imgContent = imgContent;
    this.header = header.split(";")[0];
}

@Override
public String getName() {
    // TODO - implementation depends on your requirements
    return System.currentTimeMillis() + Math.random() + "." + header.split("/")[1];
}

@Override
public String getOriginalFilename() {
    // TODO - implementation depends on your requirements
    return System.currentTimeMillis() + (int)Math.random() * 10000 + "." + header.s