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

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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));
?? ?}
}

轉載于:https://www.cnblogs.com/gty123/p/9415503.html

總結

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