原创整理不易，转载请注明出处：java spring中对properties属性文件加密及其解密

代码下载地址：http://www.zuidaima.com/share/1781588957400064.htm

加密类:

package com.zuidaima.commons.util;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.Security;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;

/**
 * <ul>
 * <li>Title:[DESEncryptUtil]</li>
 * <li>Description: [加密码解密类]</li>
 * <li>Copyright 2009 RoadWay Co., Ltd.</li>
 * <li>All right reserved.</li>
 * <li>Created by [Huyvanpull] [Jul 19, 2010]</li>
 * <li>Midified by [修改人] [修改时间]</li>
 * </ul>
 * 
 * @version 1.0
 */
public class DESEncryptUtil
{
    public static void main(String[] args) throws Exception
    {
        /** 生成KEY */
        String operatorType = "key";
        String keyFilePath = "D:/key.k";
        DESEncryptUtil.test(keyFilePath, null, operatorType);
        
        /** 加密 */
        operatorType = "encrypt";
        String sourceFilePath = "D:/jdbc_official.properties";
        DESEncryptUtil.test(keyFilePath, sourceFilePath, operatorType);
        
        /** 解密 */
        operatorType = "decrypt";
        sourceFilePath = "D:/en_jdbc_official.properties";
        DESEncryptUtil.test(keyFilePath, sourceFilePath, operatorType);
    }
    /**
     * <ul>
     * <li>Description:[创建一个密钥]</li>
     * <li>Created by [Huyvanpull] [Jul 19, 2010]</li>
     * <li>Midified by [修改人] [修改时间]</li>
     * </ul>
     * 
     * @return
     * @throws NoSuchAlgorithmException
     */
    public static Key createKey() throws NoSuchAlgorithmException
    {
        Security.insertProviderAt(new com.sun.crypto.provider.SunJCE(), 1);
        KeyGenerator generator = KeyGenerator.getInstance("DES");
        generator.init(new SecureRandom());
        Key key = generator.generateKey();
        return key;
    }
    
    /**
     * <ul>
     * <li>Description:[根据流得到密钥]</li>
     * <li>Created by [Huyvanpull] [Jul 19, 2010]</li>
     * <li>Midified by [修改人] [修改时间]</li>
     * </ul>
     * 
     * @param is
     * @return
     */
    public static Key getKey(InputStream is)
    {
        try
        {
            ObjectInputStream ois = new ObjectInputStream(is);
            return (Key) ois.readObject();
        }
        catch (Exception e)
        {
            e.printStackTrace();
            throw new RuntimeException(e);
        }
    }
    
    /**
     * <ul>
     * <li>Description:[对数据进行加密]</li>
     * <li>Created by [Huyvanpull] [Jul 19, 2010]</li>
     * <li>Midified by [修改人] [修改时间]</li>
     * </ul>
     * 
     * @param key
     * @param data
     * @return
     */
    private static byte[] doEncrypt(Key key, byte[] data)
    {
        try
        {
            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] raw = cipher.doFinal(data);
            return raw;
        }
        catch (Exception e)
        {
            e.printStackTrace();
            throw new RuntimeException(e);
        }
    }
    
    /**
     * <ul>
     * <li>Description:[对数据进行解密]</li>
     * <li>Created by [Huyvanpull] [Jul 19, 2010]</li>
     * <li>Midified by [修改人] [修改时间]</li>
     * </ul>
     * 
     * @param key
     * @param in
     * @return
     */
    public static InputStream doDecrypt(Key key, InputStream in)
    {
        try
        {
            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, key);
            ByteArrayOutputStream bout = new ByteArrayOutputStream();
            byte[] tmpbuf = new byte[1024];
            int count = 0;
            while ((count = in.read(tmpbuf)) != -1)
            {
                bout.write(tmpbuf, 0, count);
                tmpbuf = new byte[1024];
            }
            in.close();
            byte[] orgData = http://www.mamicode.com/bout.toByteArray();>

DecryptPropertyPlaceholderConfigurer.java
package com.zuidaima.spring;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.Key;
import java.util.Properties;

import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
import org.springframework.core.io.Resource;
import org.springframework.util.DefaultPropertiesPersister;
import org.springframework.util.PropertiesPersister;

import com.zuidaima.commons.util.DESEncryptUtil;

public class DecryptPropertyPlaceholderConfigurer extends
        PropertyPlaceholderConfigurer
{
    private Resource[] locations;
    
    private Resource keyLocation;
    
    private String fileEncoding;
    
    public void setKeyLocation(Resource keyLocation)
    {
        this.keyLocation = keyLocation;
    }
    
    public void setLocations(Resource[] locations)
    {
        this.locations = locations;
    }
    
    public void loadProperties(Properties props) throws IOException
    {
        if (this.locations != null)
        {
            PropertiesPersister propertiesPersister = new DefaultPropertiesPersister();
            for (int i = 0; i < this.locations.length; i++)
            {
                Resource location = this.locations[i];
                if (logger.isInfoEnabled())
                {
                    logger.info("Loading properties file from " + location);
                }
                InputStream is = null;
                try
                {
                    is = location.getInputStream();
                    Key key = DESEncryptUtil.getKey(keyLocation.getInputStream());
                    is = DESEncryptUtil.doDecrypt(key, is);
                    if (fileEncoding != null)
                    {
                        propertiesPersister.load(props, new InputStreamReader(
                                is, fileEncoding));
                    }
                    else
                    {
                        propertiesPersister.load(props, is);
                    }
                }
                finally
                {
                    if (is != null)
                    {
                        is.close();
                    }
                }
            }
        }
    }
}

配置文件:
<!-- 加密码属性文件 -->
    <bean id="myPropertyConfigurer"
        class="com.zuidaima.spring.DecryptPropertyPlaceholderConfigurer">
        <property name="locations">
            <list><value>classpath*:spring_config/jdbc_official.databaseinfo</value></list>
        </property>
        <property name="fileEncoding" value=http://www.mamicode.com/"UTF-8"/>>