md5加密+鹽方式一

這種方法是采用隨機生成鹽值加入password中組合成的新密碼，下面是md5+鹽的一個工具類，直接導入使用即可！

 

工具類

package com.oracle.utils;

import java.security.MessageDigest;
import java.util.Random;
import org.apache.commons.codec.binary.Hex;

public class Md5AndSalt {
    public static String generate(String password) {  
        Random r = new Random();
        StringBuilder sb = new StringBuilder(16);  
        sb.append(r.nextInt(99999999)).append(r.nextInt(99999999));  
        int len = sb.length();  
        if (len < 16) {  
            for (int i = 0; i < 16 - len; i++) {  
                sb.append("0");  
            }  
        }  
        String salt = sb.toString();  
        password = md5Hex(password + salt);  
        char[] cs = new char[48];  
        for (int i = 0; i < 48; i += 3) {  
            cs[i] = password.charAt(i / 3 * 2);  
            char c = salt.charAt(i / 3);  
            cs[i + 1] = c;  
            cs[i + 2] = password.charAt(i / 3 * 2 + 1);  
        }  
        return new String(cs);  
    }  
      /**  
     * 獲取十六進制字符串形式的MD5摘要  
     */  
    private static String md5Hex(String src) {  
        try {  
            MessageDigest md5 = MessageDigest.getInstance("MD5");  
            byte[] bs = md5.digest(src.getBytes());  
            return new String(new Hex().encode(bs));  
        } catch (Exception e) {  
            return null;  
        }  
    }
    public static boolean verify(String password, String md5) {  
        char[] cs1 = new char[32];  
        char[] cs2 = new char[16];  
        for (int i = 0; i < 48; i += 3) {  
            cs1[i / 3 * 2] = md5.charAt(i);  
            cs1[i / 3 * 2 + 1] = md5.charAt(i + 2);  
            cs2[i / 3] = md5.charAt(i + 1);  
        }  
        String salt = new String(cs2);  
        return md5Hex(password + salt).equals(new String(cs1));  
    }  
}

測試

 

package com.oracle.test;

import java.security.MessageDigest;
import java.util.Random;
import org.apache.commons.codec.binary.Hex;
import org.junit.Test;

import com.oracle.utils.Md5AndSalt;


public class Md5AndSaltTest {
    
    Md5AndSalt MS=new Md5AndSalt();
    
    @Test
    public void Test() {
          String ss = MS.generate("123456");
        System.out.println(MS.generate("123456"));
        System.out.println("是否是同一字符串："+MS.verify("123456", ss));
    }
}