基于Java11的Base64工具类

说明

Java 9版本之后sun.misc.Base64Encoder和sun.misc.Base64Decoder无法继续使用，原因是JDK中的/lib/tool.jar和/lib/rt.jar已经从Java SE 9中删除。

处理办法是：直接用 java.util.Base64.Encoder 和 java.util.Base64.Decoder 替代

工具类

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

public class Base64Util {
    public static String encode(byte[] src) {
        byte[] encodeBytes = Base64.getEncoder().encode(src);
        return new String(encodeBytes);
    }
  
    public static String encode(String src) {
        byte[] encodeBytes = Base64.getEncoder().encode(src.getBytes());
        return new String(encodeBytes);
    }

    public static String decode(String src) {
        byte[] decodeBytes = Base64.getDecoder().decode(src.getBytes());
        return new String(decodeBytes);
    }

    public static String encode(String src, String charset) throws UnsupportedEncodingException {
        byte[] encodeBytes = Base64.getEncoder().encode(src.getBytes(charset));
        return new String(encodeBytes);
    }

    public static String decode(String src, String charset) throws UnsupportedEncodingException {
        byte[] decodeBytes = Base64.getDecoder().decode(src.getBytes());
        return new String(decodeBytes,charset);
    }
}

测试代码

public static void main(String[] args) throws UnsupportedEncodingException {
    String temp1 = encode("中国");
    System.out.println(temp1); //5Lit5Zu9
    String res1 = decode(temp1);
    System.out.println(res1); //中国

    String temp2 = encode("中国","utf-8");
    System.out.println(temp2); //5Lit5Zu9
    String res2 = decode(temp2,"utf-8");
    System.out.println(res2); //中国

    String temp3 = encode("中国","gbk");
    System.out.println(temp3); //1tC5+g==
    String res3 = decode(temp3,"gbk");
    System.out.println(res3); //中国
}

结果：