Java-Base64转码

我不是女神ヾ 2021-09-28 01:18 342阅读 0赞

import com.bootdo.claimApilnteraction.util.BaseFile;
    import org.apache.commons.codec.binary.Base64;
    import org.springframework.stereotype.Component;
    
    import java.io.*;
    
    /**
     * Base64转码
     */
    @Component
    public class Base64Utils {
        /**
         * 进行Base64编码处理
         * @param in
         * @return
         */
        public String getBase64FromInputStream(InputStream in) throws IOException{
            // 将图片文件转化为字节数组字符串，并对其进行Base64编码处理
            byte[] data = null;
            // 读取图片字节数组
            ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
            byte[] buff = new byte[100];
            int rc = 0;
            while ((rc = in.read(buff, 0, 100)) > 0) {
                swapStream.write(buff, 0, rc);
            }
            data = swapStream.toByteArray();
            if (in != null) {
                in.close();
            }
            return new String(Base64.encodeBase64(data));
        }
    
        /**
         * Base64转PDF
         * @param base64Content
         * @param filePath
         */
        public void base64StringToPdf(String base64Content,String filePath){
            BufferedInputStream bis = null;
            FileOutputStream fos = null;
            BufferedOutputStream bos = null;
            try {
                byte[] bytes = Base64.decodeBase64(base64Content);//base64编码内容转换为字节数组
                ByteArrayInputStream byteInputStream = new ByteArrayInputStream(bytes);
                bis = new BufferedInputStream(byteInputStream);
                File file = new File(filePath);
                File path = file.getParentFile();
                if(!path.exists()){
                    path.mkdirs();
                }
                fos = new FileOutputStream(file);
                bos = new BufferedOutputStream(fos);
    
                byte[] buffer = new byte[1024];
                int length = bis.read(buffer);
                while(length != -1){
                    bos.write(buffer, 0, length);
                    length = bis.read(buffer);
                }
                bos.flush();
            } catch (Exception e) {
                e.printStackTrace();
            }finally{
                try {
                    if (bis != null){
                        bis.close();
                    }
                    if (fos != null){
                        fos.close();
                    }
                    if (bos != null){
                        bos.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    
        public static void main(String[] args) throws Exception{
            FileInputStream fis = new FileInputStream(new File("H:\\火狐下载位置\\桌面壁纸\\preview.jpg"));
            String base64 = new Base64Utils().getBase64FromInputStream(fis);
            BaseFile base = new BaseFile();
            byte[] btnum = base.base64ToFile(base64);
            InputStream is = new ByteArrayInputStream(btnum);
            FileOutputStream fos = new FileOutputStream(new File("C:\\Users\\Administrator\\Desktop\\123.jpg"));
            fos.write(btnum);
            System.out.println(base64);
        }
       
    }