JAVA实现下载网络文件public class DownloadTest { public static void downFile(String url, String fileName) ...
使用JAVA反射示例，反射修改字段属性值和方法参数public class ReflectionTest { private String test = "test"; pr...
// MD5加密 private static String md5sum(String unsignedStr) { try { MessageDigest md5 =...