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


import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
 * 檔案與base64的互相轉換操作 
 */
public class testFile {


public static void main(String[] args) {
testFile t = new testFile();
try {
String ret = t.encodeBase64File("d://IE和火狐js或css差異.docx");
System.err.println(ret);
t.decoderBase64File(ret, "d://ghsTest/retFile.docx", "d://ghsTest/");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


}
/**
     * 將檔案轉成base64 字串
     *
     * @param path檔案路徑
     * @return *
     * @throws Exception
     */
 
    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 new BASE64Encoder().encode(buffer);
 
    }
 
    /**
     * 將base64字元解碼儲存檔案
     *
     * @param base64Code
     * @param targetPath
     * @throws Exception
     */
 
    public static void decoderBase64File(String base64Code, String targetPath,String catalogue)
            throws Exception {
    File file = new File(catalogue);
    if(file.exists()==false){
    file.mkdirs();
    }
        byte[] buffer = new BASE64Decoder().decodeBuffer(base64Code);
        FileOutputStream out = new FileOutputStream(targetPath);
        out.write(buffer);
        out.close();
 
    }
}