文件读写BASE64解密、加密算法

 

import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class FileUtils {

    public static File saveFile(String fileContent, String filePath)
            throws IOException {
        if (fileContent == null) {
            return null;
        }
        BASE64Decoder decoder = new BASE64Decoder();
        byte[] picBinary = decoder.decodeBuffer(fileContent);
        File file = new File(filePath);
        FileOutputStream out = new FileOutputStream(file);
        out.write(picBinary);
        out.close();
        return file;
    }

    public static String readFile(String filePath) {
        try {
            sun.misc.BASE64Encoder encoder = new BASE64Encoder();
            File file = new File(filePath);
            java.io.FileReader reader = new FileReader(file);
            char[] c = new char[1024];
            // FileInputStream in = new FileInputStream(file);
            // byte[] b = new byte[1024];
            StringBuffer buf = new StringBuffer();
            int index = -1;
            while ((index = reader.read(c)) > 0) {
                buf.append(c, 0, index);
            }
            String result = encoder.encode(buf.toString().getBytes());
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

}