java base64编码和解码

import java.io.IOException;
public class test {

/**
* 编码
* @param filecontent
* @return String
*/
public static String encode(byte[] bstr){
return new sun.misc.BASE64Encoder().encode(bstr);
}
/**
* 解码
* @param filecontent
* @return string
*/
public static byte[] decode(String str){
byte[] bt = null;
try {
sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();
bt = decoder.decodeBuffer( str );
} catch (IOException e) {
e.printStackTrace();
}
return bt;
}
/**
* @param args
*/
public static void main(String[] args) {
test te = new test();
String aa = "更多更多";
aa = te.encode(aa.getBytes());
System.out.println("----aa:"+aa);
String str = aa;
String str2 = new String(te.decode(str));
System.out.println("-----str2:"+str2);
}
}