``` import java.lang.reflect.Method; /** * Created by lxf on 2016/12/13. */ public class TEst { public static void main(String[] args)throws Exception{ System.out.println(new String(decodeBase64("c2Rmc2Rm"))); System.out.println(encodeBase64("sdfsdf".getBytes())); } public static String encodeBase64(byte[]input) throws Exception{ Class clazz=Class.forName("com.sun.org.apache.xerces.internal.impl.dv.util.Base64"); Method mainMethod= clazz.getMethod("encode", byte[].class); mainMethod.setAccessible(true); Object retObj=mainMethod.invoke(null, new Object[]{input}); return (String)retObj; } /*** * decode by Base64 */ public static byte[] decodeBase64(String input) throws Exception{ Class clazz=Class.forName("com.sun.org.apache.xerces.internal.impl.dv.util.Base64"); Method mainMethod= clazz.getMethod("decode", String.class); mainMethod.setAccessible(true); Object retObj=mainMethod.invoke(null, input); return (byte[])retObj; } } ``` base 64的加解密。