java私人封装的加密jar包以及使用

此加密方法使用密匙所以加密之后的字段内容无法做模糊查询。

测试示例结果：

pom.xml 加入jar依赖:

	com.daixinlian
	daixinlian_commons
	1.0

jar包内容：

package com.daixinlian.common.encrypt;

import java.security.Key;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class DESUtils
{
  private static Key key;
  private static String KEY_STR = "abcdefg";//此处为一个公共密匙
  
  static {
    try { KeyGenerator generator = KeyGenerator.getInstance("DESede");
      SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
      secureRandom.setSeed(KEY_STR.getBytes());
      generator.init(secureRandom);
      
      key = generator.generateKey();
      generator = null;
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String getEncryptString(String str)
  {
    if (str == null) {
      return null;
    }
    BASE64Encoder base64en = new BASE64Encoder();
    try {
      byte[] strBytes = str.getBytes("UTF8");
      Cipher cipher = Cipher.getInstance("DESede");
      cipher.init(1, key);
      byte[] encryptStrBytes = cipher.doFinal(strBytes);
      return base64en.encode(encryptStrBytes);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String getDecryptString(String str)
  {
    if (str == null) {
      return null;
    }
    BASE64Decoder base64De = new BASE64Decoder();
    try {
      byte[] strBytes = base64De.decodeBuffer(str);
      Cipher cipher = Cipher.getInstance("DESede");
      cipher.init(2, key);
      byte[] decryptStrBytes = cipher.doFinal(strBytes);
      return new String(decryptStrBytes, "UTF8");
    } catch (Exception e) {
      e.printStackTrace(); }
    return str;
  }
}

使用方法：

String encrypStr = DESUtils.getEncryptString("需要加密的字符");//返回加密字符串

String decryptStr = DESUtils.getDecryptString("需要解密的字符"); //返回明文数据

代码操作示例：