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java怎么用md5加密数据

九三
169
2021-01-22 08:53:02
栏目: 编程语言

java怎么用md5加密数据

java使用md5对数据进行加密,具体方法如下:

package com.ow.util;

import java.security.MessageDigest;

//MD5加密解密

public class MD5Util {

public static String string2MD5(String inStr){

MessageDigest md5 = null;

try{

md5 = MessageDigest.getInstance("MD5");

}catch (Exception e){

System.out.println(e.toString());

e.printStackTrace();

return "";

}

char[] charArray = inStr.toCharArray();

byte[] byteArray = new byte[charArray.length];

for (int i = 0; i < charArray.length; i++)

byteArray[i] = (byte) charArray[i];

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();

}

public static String MD5Test(String inStr){

String xy = "xy";

String finalStr="";

if(inStr!=null){

String fStr = inStr.substring(0, 1);

String lStr = inStr.substring(1, inStr.length());

finalStr = string2MD5( fStr+xy+lStr);

}else{

finalStr = string2MD5(xy);

}

return finalStr;

}

// 测试

public static void main(String args[]) {

String s1 = "zhang";

System.out.println("使用工具类进行加密的为 "+MD5Test(s1));

}

}

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