Java 字符串 base64码 字节数组 互相转换

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

import java.io.UnsupportedEncodingException;
import java.util.Base64;

public class Base64Util {
    /**
     * String转换为Bse64
     * @param str
     * @return
     */
    public static String strConvertBase(String str) {
        if(null != str){
            Base64.Encoder encoder = Base64.getEncoder();
            return encoder.encodeToString(str.getBytes());
        }
        return null;
    }

    /**
     * Base64转换成String
     * @param str
     * @return
     */
    public static String baseConvertStr(String str) {
        if(null != str){
            Base64.Decoder decoder = Base64.getDecoder();
            try {
                return new String(decoder.decode(str.getBytes()), "UTF-8");
            } catch (UnsupportedEncodingException e) {
                return null;
            }
        }
        return null;
    }

    /**
     * base 64 encode
     *
     * @param bytes
     *            待编码的byte[]
     * @return 编码后的base 64 code
     */
    public static String base64Encode(byte[] bytes) {
        return new BASE64Encoder().encode(bytes);
    }

    /**
     * base 64 decode
     *
     * @param base64Code
     *            待解码的base 64 code
     * @return 解码后的byte[]
     * @throws Exception
     */
    public static byte[] base64Decode(String base64Code) throws Exception {
        return new BASE64Decoder().decodeBuffer(base64Code);
    }

}