這是專案中用到的檔案與base64字串互轉的工具，記錄於此。

import android.util.Base64;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

/**
 * Created by LY on 2015/6/12.
 * encodeBase64File:(將檔案轉成base64 字串)
 * decoderBase64File:(將base64字元解碼儲存檔案)
 */

public class Base64FileUtil {

    /**
     * encodeBase64File:(將檔案轉成base64 字串). <br/>
     * @author 
 
[email protected]
     * @param path 檔案路徑
     * @return
     * @throws Exception
     * @since JDK 1.6
     */
    public static String encodeBase64File(String path) throws Exception {
        File  file = new File(path);
        FileInputStream inputFile = new FileInputStream(file);
        byte[] buffer = new byte[(int)file.length()];
        inputFile.read(buffer);
        inputFile.close();
        return Base64.encodeToString(buffer,Base64.DEFAULT);
    }

    /**
     * decoderBase64File:(將base64字元解碼儲存檔案). <br/>
     * @author 
 
[email protected]
     * @param base64Code 編碼後的字串
     * @param savePath  檔案儲存路徑
     * @throws Exception
     * @since JDK 1.6
     */
    public static void decoderBase64File(String base64Code,String savePath) throws Exception {
//byte[] buffer = new BASE64Decoder().decodeBuffer(base64Code);
        byte[] buffer =Base64.decode(base64Code, Base64.DEFAULT);
        FileOutputStream out = new FileOutputStream(savePath);
        out.write(buffer);
        out.close();
    }
}