工具类：base64编解码_base64encoder

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.Base64;

public class EncryptUtil {
    private static final Logger logger = LoggerFactory.getLogger(EncryptUtil.class);

    /**
     * 将字节数组进行base64编码
     * @param bytes
     * @return
     */
    public static String encodeBase64(byte[] bytes){
        String encoded = Base64.getEncoder().encodeToString(bytes);
        return encoded;
    }

    /**
     * 将字符串进行base64解码
     * @param str
     * @return
     */
    public static byte[]  decodeBase64(String str){
        byte[] bytes = null;
        bytes = Base64.getDecoder().decode(str);
        return bytes;
    }

    /**
     * 将字符串str 先使用utf-8符集进行url编码 +转为%2B ?转为%3F 等防止传输过程中出问题，然后在进行base64编码
     * @param str
     * @return
     */
    public static String encodeUTF8StringBase64(String str){
        String encoded = null;
        try {
            encoded = URLEncoder.encode(str, "utf-8");
            encoded = Base64.getEncoder().encodeToString(encoded.getBytes("utf-8"));
        } catch (UnsupportedEncodingException e) {
            logger.warn("不支持的编码格式",e);
        }
        return encoded;

    }

    /**
     * 将字符串str 先进行base64解码 然后在使用utf-8字符集进行url解码
     * @param str
     * @return
     */
    public static String  decodeUTF8StringBase64(String str){
        String decoded = null;
        byte[] bytes = Base64.getDecoder().decode(str);

        try {
            decoded = new String(bytes,"utf-8");
            decoded = URLDecoder.decode(decoded, "utf-8");
        }catch(UnsupportedEncodingException e){
            logger.warn("不支持的编码格式",e);
        }
        return decoded;
    }


    public static void main(String [] args){
        String str = "www.baidu.com?a=1&b=2+1&c=dfdasaf+%&&d=1";
        String encoded = EncryptUtil.encodeUTF8StringBase64(str);
        String decoded = EncryptUtil.decodeUTF8StringBase64(encoded);
        System.out.println(str);
        System.out.println(encoded);
        System.out.println(decoded);

    }


}
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