[游戏开发]base64上传文件

Base64DecodedMultipartFile类

package com.liwei.bestpayjd.utils;

import org.springframework.web.multipart.MultipartFile;

import java.io.*;

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() {
        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 file) throws IOException, IllegalStateException {
        new FileOutputStream(file).write(imgContent);
    }
}

Base64StrToImage 类

package com.liwei.bestpayjd.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;
import sun.misc.BASE64Decoder;

import java.util.List;


public class Base64StrToImage {
        Logger logger = LoggerFactory.getLogger(Base64StrToImage.class);
        public  static MultipartFile base64MutipartFile(String imgStr){
            try {
                String [] baseStr = imgStr.split(",");
                BASE64Decoder base64Decoder = new BASE64Decoder();
                byte[] b =  new byte[0];
                b = base64Decoder.decodeBuffer(baseStr[1]);
                for(int i = 0; i < b.length; ++i) {
                    if (b[i] < 0) {
                        b[i] += 256;
                    }
                }
                return  new Base64DecodedMultipartFile(b,baseStr[0]) ;
            }catch (Exception e){
                e.printStackTrace();
                return null;
            }
        }

}

上传的实现方法

 Base64DecodedMultipartFile file = (Base64DecodedMultipartFile) Base64StrToImage.base64MutipartFile(fileContent);
                    if (file != null) {// 判断上传的文件是否为空
                        SimpleDateFormat sf = new SimpleDateFormat("YYMM/");
                        String fileStr = sf.format(new Date());
                        SimpleDateFormat s = new SimpleDateFormat("DD/");
                        String s1 = s.format(new Date());
                        String path = null;// 文件路径
                        String fileName = file.getOriginalFilename();// 文件原名称
                        logger.info("上传的文件原名称=>" + fileName);
                        // 自定义的文件名称
                        String trueFileName = file.getOriginalFilename();
                        // 设置存放图片文件的路径
                        path = ossProperties.getLocalPath() + fileStr + s1 + trueFileName;
                        logger.info("本地存放图片文件的路径=>" + path);
                        File saveDir = new File(path);
                        if (!saveDir.getParentFile().exists()) {
                            saveDir.getParentFile().mkdirs();
                        }

                        // 转存文件到指定的路径
                        file.transferTo(saveDir);
                  
                 
                    } else {
                        logger.info("相对应的文件");
                        return null;
                    }

String imageType = null;
// 判断文件类型
            imageType = fileName.indexOf(".") != -1 ? fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length()) : null;

《新程序员》：云原生和全面数字化实践

50位技术专家共同创作，文字、视频、音频交互阅读