java spring中对properties属性文件加密及其解密

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package com.system.utils;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 {/**      * <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 = bout.toByteArray();              byte[] raw = cipher.doFinal(orgData);              ByteArrayInputStream bin = new ByteArrayInputStream(raw);              return bin;          }          catch (Exception e)          {              e.printStackTrace();              throw new RuntimeException(e);          }      }            private static void test(String keyFilePath, String sourceFilePath,              String operatorType) throws Exception      {          // 提供了Java命令使用该工具的功能          if (operatorType.equalsIgnoreCase("key"))          {              // 生成密钥文件              Key key = DesEncryptUtil.createKey();              ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(keyFilePath));              oos.writeObject(key);              oos.close();              System.out.println("成功生成密钥文件" + keyFilePath);          }          else if (operatorType.equalsIgnoreCase("encrypt"))          {              // 对文件进行加密              File file = new File(sourceFilePath);              FileInputStream in = new FileInputStream(file);              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 = bout.toByteArray();              Key key = getKey(new FileInputStream(keyFilePath));              byte[] raw = DesEncryptUtil.doEncrypt(key, orgData);              file = new File(file.getParent() + "\\en_" + file.getName());              FileOutputStream out = new FileOutputStream(file);              out.write(raw);              out.close();              System.out.println("成功加密，加密文件位于:" + file.getAbsolutePath());          }          else if (operatorType.equalsIgnoreCase("decrypt"))          {              // 对文件进行解密              File file = new File(sourceFilePath);              FileInputStream fis = new FileInputStream(file);                            Key key = getKey(new FileInputStream(keyFilePath));              InputStream raw = DesEncryptUtil.doDecrypt(key, fis);              ByteArrayOutputStream bout = new ByteArrayOutputStream();              byte[] tmpbuf = new byte[1024];              int count = 0;              while ((count = raw.read(tmpbuf)) != -1)              {                  bout.write(tmpbuf, 0, count);                  tmpbuf = new byte[1024];              }              raw.close();              byte[] orgData = bout.toByteArray();              file = new File(file.getParent() + "\\rs_" + file.getName());              FileOutputStream fos = new FileOutputStream(file);              fos.write(orgData);              System.out.println("成功解密，解密文件位于:" + file.getAbsolutePath());          }      }          /**     * 测试.....     * @param args     * @throws Exception      */    public static void main(String[] args) throws Exception {    /** 生成KEY */          String operatorType = "key";          String keyFilePath = "/home/zer0Server/key.k";          DesEncryptUtil.test(keyFilePath, null, operatorType);                    /** 加密 */          operatorType = "encrypt";          String sourceFilePath = "/home/zer0Server/css.properties";          DesEncryptUtil.test(keyFilePath, sourceFilePath, operatorType);                    /** 解密 */          operatorType = "decrypt";          sourceFilePath = "/home/zer0Server/en_css.properties";          DesEncryptUtil.test(keyFilePath, sourceFilePath, operatorType);  }}

DecryptPropertyPlaceholderConfigurer.Java

package com.system.utils;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;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.system.utils.DecryptPropertyPlaceholderConfigurer">              <property name="locations">                  <list><value>classpath*:spring_config/jdbc_official.databaseinfo</value></list>              </property>              <property name="fileEncoding" value="UTF-8"/>              <property name="keyLocation" value="classpath:spring_config/key.key" />          </bean>

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

原文:http://www.blogjava.net/hwpok/archive/2010/07/19/326537.html

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