sha 加密

package com.security.sha;

import java.security.MessageDigest;

/**

• @author Administrator
• sha 加密 */ public class Sha { public static void main(String[] args) throws Exception { System.out.println("簡單的sha加密__:"+shaEncode("123456")); System.out.println("帶key映射的加密__:"+shaKeyEncode("zhangsan","123456")); } public static String shaEncode(String generalStr) throws Exception { MessageDigest messageDigest = MessageDigest.getInstance("SHA"); // MessageDigest messageDigest = MessageDigest.getInstance("SHA-256"); // MessageDigest messageDigest = MessageDigest.getInstance("SHA-384"); // MessageDigest messageDigest = MessageDigest.getInstance("SHA-512"); messageDigest.update(generalStr.getBytes("UTF-8")); byte[] bytes = messageDigest.digest(); String shaStr = ""; for (int i = 0; i < bytes.length; i++) { String hex = Integer.toHexString(bytes[i] & 0xFF); if (hex.length()<2) { hex = hex + "0"; } shaStr = shaStr + hex; } return shaStr; } public static String shaKeyEncode(String username,String password) throws Exception { String generalStr=username+password; MessageDigest messageDigest = MessageDigest.getInstance("SHA"); // MessageDigest messageDigest = MessageDigest.getInstance("SHA-256"); // MessageDigest messageDigest = MessageDigest.getInstance("SHA-384"); // MessageDigest messageDigest = MessageDigest.getInstance("SHA-512"); messageDigest.update(generalStr.getBytes("UTF-8")); byte[] bytes = messageDigest.digest(); String shaStr = ""; for (int i = 0; i < bytes.length; i++) { String hex = Integer.toHexString(bytes[i] & 0xFF); if (hex.length()<2) { hex = hex + "0"; } shaStr = shaStr + hex; } return shaStr; }

}