jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc\:mysql\://${p.jdbc.url}/${p.jdbc.dbname}?useUnicode\=true&characterEncoding\=UTF-8&zeroDateTimeBehavior\=convertToNull&rewriteBatchedStatements\=true
jdbc.username=${p.jdbc.username}
jdbc.password=${p.jdbc.password}  

    <!-- 将多个配置文件读取到容器中，交给Spring管理 --><bean id="propertyConfigurer"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="locations"><list><value>classpath:/properties/*.properties</value></list></property></bean>

public class DESUtils
{  private static Key key;  private static String KEY_STR="mykey";  static{  try  {  KeyGenerator generator = KeyGenerator.getInstance("DES");  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);  }  }  /** * 对字符串进行加密，返回BASE64的加密字符串 * <功能详细描述> * @param str * @return * @see [类、类#方法、类#成员] */  public static String getEncryptString(String str){  BASE64Encoder base64Encoder = new BASE64Encoder();  System.out.println(key);  try  {  byte[] strBytes = str.getBytes("UTF-8");  Cipher cipher = Cipher.getInstance("DES");  cipher.init(Cipher.ENCRYPT_MODE, key);  byte[] encryptStrBytes = cipher.doFinal(strBytes);  return base64Encoder.encode(encryptStrBytes);  }  catch (Exception e)  {  throw new RuntimeException(e);  }  }  /** * 对BASE64加密字符串进行解密 * <功能详细描述> * @param str * @return * @see [类、类#方法、类#成员] */  public static String getDecryptString(String str){  BASE64Decoder base64Decoder = new BASE64Decoder();  try  {  byte[] strBytes = base64Decoder.decodeBuffer(str);  Cipher cipher = Cipher.getInstance("DES");  cipher.init(Cipher.DECRYPT_MODE, key);  byte[] encryptStrBytes = cipher.doFinal(strBytes);  return new String(encryptStrBytes,"UTF-8");  }  catch (Exception e)  {  throw new RuntimeException(e);  }  }  public static void main(String[] args)  {  String name ="root";  String password="1234";  String encryname = getEncryptString(name);  String encrypassword = getEncryptString(password);  System.out.println(encryname);  System.out.println(encrypassword);  System.out.println(getDecryptString(encryname));  System.out.println(getDecryptString(encrypassword));  }
}  

public class EncryptPropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer
{  private String[] encryptPropNames = {"jdbc.username", "jdbc.password"};  @Override  protected String convertProperty(String propertyName, String propertyValue)  {  //如果在加密属性名单中发现该属性  if (isEncryptProp(propertyName))  {  String decryptValue = DESUtils.getDecryptString(propertyValue);  System.out.println(decryptValue);  return decryptValue;  }else {  return propertyValue;  }  }  private boolean isEncryptProp(String propertyName)  {  for (String encryptName : encryptPropNames)  {  if (encryptName.equals(propertyName))  {  return true;  }  }  return false;  }
}  

用<bean id="propertyConfigurer" class="org.utils.EncryptPropertyPlaceholderConfigurer" ><property name="locations"><list><value>classpath:/properties/*.properties</value></list></property></bean>
替换<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"><list><value>classpath:/properties/*.properties</value></list></property></bean>