Spring读取加密属性文件处理

Spring读取加密属性文件处理

 

引言：Spring框架俨然已经是目前Java WEB项目开发的一个宠儿，更有人将Spring, Struts,和Hibernage称之为Java WEB项目开发的3件利器。Spring的依赖、注入、AOP及和其它框架的很好集成（如：hibername、ibatis、struts等）确实给web项目开发带来了诸多便利性，但是任何一种框架都不能完全满足个性化需求开发，spring亦是如此。现有一个项目是基于spring、struts和ibtatis的，其中数据库连接池使用的是proxool，领导要求将proxool连接池配置文件进行加密，这里有2种解决方法：

1）    扩展ProxoolDataSource，重写getNewConnection方法，对其置相关数据库配置属性时进行解密处理；

2）    扩展Spring读取属性文件文件的类PropertyPlaceholderConfigurer

 

1、  扩展ProxoolDataSource

package *.*; import java.io.InputStream;import java.sql.Connection;import java.sql.SQLException;import java.util.Properties; import org.logicalcobwebs.proxool.ProxoolDataSource; public class ProxoolDataSourceEX extends ProxoolDataSource {         private Logger errorLog = CommonLogger.getErrorLog(ProxoolDataSourceEX.class);         private static Properties proxoolProperties = null;         private static ProxoolDataSource dataSource = null;         //         public synchronized Connection getConnection() {                   try {                            if (dataSource != null)                                     return super.getConnection();                            else                                     return getNewConnection();                  } catch (SQLException e) {//                          errorLog.error("…….", e);                   }                   return null;         }                 private synchronized Connection getNewConnection() {                   if(proxoolProperties==null){                            InputStream is = Thread.currentThread().getContextClassLoader().                                     getResourceAsStream("proxool.properties");                            proxoolProperties = new Properties();                            try{                                     proxoolProperties.load(is);                            }catch(Exception e){                                     e.printStackTrace();                            }                   }                //属性值的解密（调用相应解密算法，解密）        //解密后的属性值置入                   this.setDriver(driver);                   this.setDriverUrl(url);                   …              try {                     return super.getConnection();              } catch (SQLException e) {                     errorLog.error("…", e);                   }                   return null;         }}

2、  扩展Spring读取属性文件文件的类PropertyPlaceholderConfigurer

1）    spring datasource配置

<?xml version="1.0" encoding="utf-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans>     <!-- ======================================================================== -->     <!--  DataSource定义。                                                        -->     <!-- ======================================================================== -->     <bean id="DBConfigurer"     class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">         <property name="locations">              <list>                   <value>classpath:proxool.properties</value>              </list>         </property>     </bean>      <bean id="dataSource"         class="org.logicalcobwebs.proxool.ProxoolDataSource">         <property name="driver">              <value>${dev_proxool_driver_class}</value>         </property>         <property name="driverUrl">              <value>${dev_proxool_driver_url}</value>         </property>         <property name="user">              <value>${dev_proxool_user}</value>         </property>         <property name="password">              <value>${dev_proxool_password}</value>         </property>         <property name="alias">              <value>${dev_proxool_alias}</value>         </property>         …     </bean>     …</beans>

2）    扩展PropertyPlaceholderConfigurer，对其方法resolvePlaceholder进行重写。

package *.*; import java.util.Properties; import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer; public class PropertyPlaceholderConfigurerEX extends PropertyPlaceholderConfigurer{     private boolean secutiry = false;     private Log logger = LogFactory.getLog(PropertyPlaceholderConfigurerEX.class);     //     protected String resolvePlaceholder(String placeholder, Properties props) {         String placeholderValue = props.getProperty(placeholder);         if(this.secutiry){              placeholderValue = deEncrypt(placeholderValue);         }         return placeholderValue;     }     //     public boolean isSecutiry() {         return secutiry;     }     public void setSecutiry(boolean secutiry) {         this.secutiry = secutiry;     }         private String deEncrypt(String miwen){          return 解密后的字串;     }}

3）    修改上述的datasource配置

<?xml version="1.0" encoding="utf-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans>     <!-- ======================================================================== -->     <!--  DataSource定义。                                                        -->     <!-- ======================================================================== -->     <bean id="DBConfigurer"     class="*.*.PropertyPlaceholderConfigurerEX">         <property name="locations">              <list>                   <value>classpath:proxool.properties</value>              </list>         </property>         <!—security为false，则对属性文件的属性值不进行解密处理，为true，则进行解密-->       <property name="secutiry">           <value>false</value>       </property>        <!—扩展PropertyPlaceholderConfigurerEX，最好使用解密算法也可在此处配置-->     </bean>    同1）datasource配置

转载地址：http://blog.csdn.net/chuangxin/article/details/5039242