几种加密算法

package util;

import java.io.UnsupportedEncodingException;

import org.apache.commons.codec.binary.Base64;


/**
 * @todo Apache的 commons-codec.jar得到的编码字符串是不带换行符的
 * @author zhangyanan
 * @date 2018年8月7日
 */
public class CommonsCodecEncodeDecode {
    /**
     * 加密str
     * 
     * @param str
     * @return
     */
    public static String getBase64(String str) {
        byte[] b = null;
        String s = null;
        try {
            b = str.getBytes("utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        if (b != null) {
            s=Base64.encodeBase64String(b);
        }
        return s;
    }

    
    /**
     * 解密s
     * 
     * @param str
     * @return
     */
    public static String getFromBase64(String s) {
        byte[] b = null;
        String result = null;
        if (s != null) {
            try {
                b = Base64.decodeBase64(s);
                result = new String(b, "utf-8");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return result;
    }

}

package util;

import java.io.FileOutputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 * @todo BASE64加密解密类
 * @author zhangyanan
 * @date 2018年8月6日
 */
@SuppressWarnings("restriction")
public class EncodeAndDecode {
    public static void main(String[] args) {
        String base64 = getBase64("http:www.baidu.comasdfsdfcaewfsdcsdfqweafd输入1230.，。");
        String fromBase64 = getFromBase64(base64);
        System.out.println(base64);
        System.out.println();
        System.out.println(fromBase64);
        
    }

    /**
     * 加密str
     * 
     * @param str
     * @return
     */
    public static String getBase64(String str) {
        byte[] b = null;
        String s = null;
        try {
            b = str.getBytes("utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        if (b != null) {
            s = new BASE64Encoder().encode(b);
        }
        return s;
    }

    
    /**
     * 解密s
     * 
     * @param str
     * @return
     */
    public static String getFromBase64(String s) {
        byte[] b = null;
        String result = null;
        if (s != null) {
            BASE64Decoder decoder = new BASE64Decoder();
            try {
                b = decoder.decodeBuffer(s);
                result = new String(b, "utf-8");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return result;
    }

    public static boolean GenerateImage(String base64str, String savepath) { // 对字节数组字符串进行Base64解码并生成图片
        if (base64str == null) // 图像数据为空
            return false;
        // System.out.println("开始解码");
        BASE64Decoder decoder = new BASE64Decoder();
        try {
            // Base64解码
            byte[] b = decoder.decodeBuffer(base64str);
            // System.out.println("解码完成");
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {// 调整异常数据
                    b[i] += 256;
                }
            }
            // System.out.println("开始生成图片");
            // 生成jpeg图片
            OutputStream out = new FileOutputStream(savepath);
            out.write(b);
            out.flush();
            out.close();
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
}

package util;

import javax.xml.bind.DatatypeConverter;

/**
 * @todo
 * @author zhangyanan
 * @date 2018年8月7日
 */
public class DatatypeConverterTest {
    public static void main(String[] args){
        String s="www.bai注释";
        String printBase64Binary = DatatypeConverter.printBase64Binary(s.getBytes());
        System.out.println(printBase64Binary);
        byte[] parseBase64Binary = DatatypeConverter.parseBase64Binary(printBase64Binary);
        System.out.println(new String(parseBase64Binary));
        System.out.println("----------");
    }
}

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

/**
 * @todo java8 java.util.Base64测试
 * @author zhangyanan
 * @date 2018年8月7日
 */
public class TestBase64 {
    public static void main(String[] args) throws UnsupportedEncodingException {
        // 编码
        String asB64 = Base64.getEncoder().encodeToString("聊聊ss33!%".getBytes("utf-8"));
        System.out.println(asB64);// 输出为: c29tZSBzdHJpbmc=
        // 解码
        byte[] asBytes = Base64.getDecoder().decode(asB64);
        System.out.println(new String(asBytes, "utf-8"));// 输出为: some string
    }
    
}