java将base64编码内容转换为pdf/otd文件

源码分享，直接复制粘贴使用即可，亲测可用：

package utils;

import java.io.*;
import java.util.Base64;

public class FileUtil {

    public static void download(String base64Content,String filePath) throws IOException {
        Base64.Decoder decoder = Base64.getMimeDecoder();
        BufferedInputStream bis = null;
        FileOutputStream fos = null;
        BufferedOutputStream bos = null;
        byte[] bytes = decoder.decode(base64Content);
        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();
        bos.close();
        fos.close();
        bis.close();
    }
}