DES加密（jdbc.properties）

加密工具类

package com.action;

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 = "htsc-pos-pbos";// 密钥
        private static String CHARSETNAME = "UTF-8";// 编码
        private static String ALGORITHM = "AES";// 加密类型
     
        static {
            try {
                KeyGenerator kgen = KeyGenerator.getInstance(ALGORITHM);
                SecureRandom random=SecureRandom.getInstance("SHA1PRNG");
                random.setSeed(KEY_STR.getBytes());
                kgen.init(128, random);
                
                key = kgen.generateKey();
                kgen = null;
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
     
        /**
         * 对str进行DES加密
         * 
         * @param str
         * @return
         */
        public static String getEncryptString(String str) {
            BASE64Encoder base64encoder = new BASE64Encoder();
            try {
                byte[] bytes = str.getBytes(CHARSETNAME);
                Cipher cipher = Cipher.getInstance(ALGORITHM);
                cipher.init(Cipher.ENCRYPT_MODE, key);
                byte[] doFinal = cipher.doFinal(bytes);
                return base64encoder.encode(doFinal);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
     
        /**
         * 对str进行DES解密
         * 
         * @param str
         * @return
         */
        public static String getDecryptString(String str) {
            BASE64Decoder base64decoder = new BASE64Decoder();
            try {
                byte[] bytes = base64decoder.decodeBuffer(str);
                Cipher cipher = Cipher.getInstance(ALGORITHM);
                cipher.init(Cipher.DECRYPT_MODE, key);
                byte[] doFinal = cipher.doFinal(bytes);
                return new String(doFinal, CHARSETNAME);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        
        public static void main(String[] args) {
            System.out.println(getEncryptString("oracle.jdbc.driver.OracleDriver"));
        }
    }

读取jdbc.properties的value值并解密

package com.action;

import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;

import com.action.DESUtils;

public class EncryptPropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {
    private String[] encryptPropNames = { "jdbc.driverClassName" ,"jdbc.url" , "jdbc.username", "jdbc.password"};
     
    protected String convertProperty(String propertyName, String propertyValue) {
        if (isEncryptProp(propertyName)) {
            String decryptValue = DESUtils.getDecryptString(propertyValue);
            return decryptValue;
        } else {
            return propertyValue;
        }
    }
 
    
    private boolean isEncryptProp(String propertyName) {
        for (String encryptpropertyName : encryptPropNames) {
            if (encryptpropertyName.equals(propertyName))
                return true;
        }
        return false;
    }
}

encryptPropNames中的值对应jdbc.properties中的name。

在spring配置文件中添加如下配置

<bean class="com.openeap.common.web.EncryptPropertyPlaceholderConfigurer"  >
         <property name="ignoreUnresolvablePlaceholders" value="true"></property>
        <property name="locations">    
           <list>    
               <value>classpath:jdbc.properties</value>    
           </list>    
       </property>  
</bean>

 也可以在加密工具类中添加二进制加密

注：要先将jdbc.properties文件中value值先加密替换原来value值。