java的加密解密

1. 使用md5和sha256必须导入commons-codec-1.9.jar包

2. base64加密和解密是依赖于jdk自带的jar包

3. md5和sha256是不可逆的，md5加密效率较快，sha256加密安全较高

public class TestEncode {
    //异或实现加密解密
    public static String xor(String input){
        char[] chs = input.toCharArray();
        for(int i = 0; i < chs.length; i++){
            chs[i] = (char) (chs[i]^3000);
        }
        return new String(chs);
    }

    //md5加密，效率较快
    public static String md5Encode(byte[] input) {
        return DigestUtils.md5Hex(input);
    }

    //sha256加密，安全较高
    public static String sha256Encode(byte[] input) {
        return DigestUtils.sha256Hex(input);
    }

    //base64加密
    public static String base64Encode(byte[] input) {
        String result = null;
        try {
            Class<?> clazz = Class.forName("com.sun.org.apache.xerces.internal.impl.dv.util.Base64");
            Method method = clazz.getMethod("encode", (byte[].class));
            result = (String) method.invoke(null, input);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    //base64解密
    public static byte[] base64Decode(String input) {
        byte[] result = null;
        try {
            Class<?> clazz = Class.forName("com.sun.org.apache.xerces.internal.impl.dv.util.Base64");
            Method method = clazz.getMethod("decode", (String.class));
            result = (byte[]) method.invoke(null, input);

        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }
}