2020-12-24 10:23:13
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工具类代码如下：
代码语言：javascript
复制package util;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Scanner;
/**
* 3DES加密工具类
*
* @author shijing
* @DATE 2020/9/15 11:22
*/
public class DESUtils {
/**
* 随意定一个私钥（长度必须为24位）
*/
public static final String SECRET_KEY = "ABCDEFGHIJKLMN1234567890";
/**
* 加密
*
* @param inStr 需要加密的内容
* @param secretKey 密钥
* @return 加密后的数据
*/
public static String encrypt(String inStr, String secretKey) {
SecretKey deskey = new SecretKeySpec(secretKey.getBytes(), "DESede");
Cipher cipher;
String outStr = null;
try {
cipher = Cipher.getInstance("DESede");
cipher.init(Cipher.ENCRYPT_MODE, deskey);
outStr = byte2hex(cipher.doFinal(inStr.getBytes()));
} catch (Exception e) {
System.err.println("3DES加密异常" e.getMessage());
}
System.out.println("3DES加密后字符串：" outStr);
return outStr;
}
/**
* 解密
*
* @param inStr 需要解密的内容
* @param secretKey 密钥
* @return 解密后的数据
*/
public static String decrypt(String inStr, String secretKey) {
SecretKey deskey = new SecretKeySpec(secretKey.getBytes(), "DESede");
Cipher cipher;
String outStr = null;
try {
cipher = Cipher.getInstance("DESede");
cipher.init(Cipher.DECRYPT_MODE, deskey);
outStr = new String(cipher.doFinal(hex2byte(inStr)));
} catch (Exception e) {
System.err.println("3DES解密异常" e.getMessage());
}
System.out.println("3DES解密后数据：" outStr);
return outStr;
}
/**
* 转化为16进制字符串方法
*
* @param digest 需要转换的字节组
* @return 转换后的字符串
*/
private static String byte2hex(byte[] digest) {
StringBuffer hs = new StringBuffer();
String stmp = "";
for (int n = 0; n < digest.length; n ) {
stmp = Integer.toHexString(digest[n] & 0XFF);
if (stmp.length() == 1) {
hs.append("0" stmp);
} else {
hs.append(stmp);
}
}
return hs.toString().toUpperCase();
}
/**
* 十六进转二进制
*
* @param hexStr 待转换16进制字符串
* @return 二进制字节组
*/
public static byte[] hex2byte(String hexStr) {
if (hexStr == null)
return null;
hexStr = hexStr.trim();
int len = hexStr.length();
if (len == 0 || len % 2 == 1)
return null;
byte[] digest = new byte[len / 2];
try {
for (int i = 0; i < hexStr.length(); i = 2) {
digest[i / 2] = (byte) Integer.decode("0x" hexStr.substring(i, i 2)).intValue();
}
return digest;
} catch (Exception e) {
return null;
}
}
public static void main(String[] args) {
// String pwd = "11111111";
// String encrypt = encrypt(pwd,SECRET_KEY);
// System.out.println(encrypt);
//
// System.out.println(decrypt("6AFD5420C5BB8F4F",SECRET_KEY));
// System.out.println(decrypt(encrypt,SECRET_KEY));
int num = 0;
do {
Scanner sc = new Scanner(System.in);
System.out.println("请输入要加密的类型数字： 1、加密账号密码字符串 2、加密xsd文件 3、解密数据");
String str = sc.nextLine();
if (str.equals("1")) {
System.out.println("请输入要加密的数据：");
String data = sc.nextLine();
System.out.println("加密后的数据为:" encrypt(data, SECRET_KEY));
} else if(str.equals("2")){
System.out.println("请输入要加密的xsd路径：");
String xsdPath = sc.nextLine();
System.out.println("加密后的xsd内容为:" encryptXsd(xsdPath));
} else {
System.out.println("请输入要解密的数据：");
String data = sc.nextLine();
System.out.println("解密后的数据为:" decrypt(data, SECRET_KEY));
}
System.out.println("是否继续操作？ 0 继续， 1 退出");
num = sc.nextInt();
} while (num==0);
System.exit(0);
}
public static String encryptXsd(String xsdPath){
ByteArrayInputStream bytein = null;
String data = null;
// String xsdPath = "xsd/pacs.008.001.06.xsd";
try{
BufferedReader bufferedReader = Files.newBufferedReader(Paths.get(DESUtils.class.getClassLoader().getResource(xsdPath).toURI())) ;
StringBuilder stringBuilder = new StringBuilder();
String liner = "";
while ((liner = bufferedReader.readLine()) != null) {
stringBuilder.append(liner);
}
System.out.println("读取的xsd内容:" stringBuilder.toString());
data = encrypt(stringBuilder.toString(),SECRET_KEY);
System.out.println("加密后内容：" data);
bytein = new ByteArrayInputStream(data.getBytes());
String decStr = decrypt(data,SECRET_KEY);
System.out.println("解密后内容：" decStr);
} catch (Exception e) {
e.printStackTrace();
}
return data;
}
}
