单向加密算法MD5和SHA

来源：互联网发布：全国计算机二级vb题型编辑：程序博客网时间：2024/05/17 03:42

package com.xxx.util;import java.security.MessageDigest;/**  * 采用MD5加密 */public class Md5Util {    /***      * MD5加密 生成32位md5码     * @param 待加密字符串     * @return 返回32位md5码     */    public static String md5Encode(String inStr) throws Exception {        MessageDigest md5 = null;        try {            md5 = MessageDigest.getInstance("MD5");        } catch (Exception e) {            System.out.println(e.toString());            e.printStackTrace();            return "";        }        byte[] byteArray = inStr.getBytes("UTF-8");        byte[] md5Bytes = md5.digest(byteArray);        StringBuffer hexValue = new StringBuffer();        for (int i = 0; i < md5Bytes.length; i++) {            int val = ((int) md5Bytes[i]) & 0xff;            if (val < 16) {                hexValue.append("0");            }            hexValue.append(Integer.toHexString(val));        }        return hexValue.toString();    }    /**     * 测试主函数     * @param args     * @throws Exception     */    public static void main(String args[]) throws Exception {        String str = new String("dddaaaffe");        System.out.println("原始：" + str);        System.out.println("MD5后：" + md5Encode(str));    }}

package com.xxx.util;import java.security.MessageDigest;/**  * 采用SHAA加密 */public class ShaUtil {    /***      * SHA加密 生成40位SHA码     * @param 待加密字符串     * @return 返回40位SHA码     */    public static String shaEncode(String inStr) throws Exception {        MessageDigest sha = null;        try {            sha = MessageDigest.getInstance("SHA");        } catch (Exception e) {            System.out.println(e.toString());            e.printStackTrace();            return "";        }        byte[] byteArray = inStr.getBytes("UTF-8");        byte[] md5Bytes = sha.digest(byteArray);        StringBuffer hexValue = new StringBuffer();        for (int i = 0; i < md5Bytes.length; i++) {            int val = ((int) md5Bytes[i]) & 0xff;            if (val < 16) {                 hexValue.append("0");            }            hexValue.append(Integer.toHexString(val));        }        return hexValue.toString();    }    /**     * 测试主函数     * @param args     * @throws Exception     */    public static void main(String args[]) throws Exception {        String str = new String("aabbcc");        System.out.println("原始：" + str);        System.out.println("SHA后：" + shaEncode(str));    }}

0 0