mybatis在读取配置文件，创建SqlSessionFactory对象时。需要对密码进行解密，再连接数据库，该如何操作。

public static void init() {
		login();
		
		String resource = "mybatis-configuration.xml";
        InputStream inputStream = null;
        File newFile = null;
		try {
			newFile = getValue(resource);
			inputStream = new FileInputStream(newFile);
			SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder()
	                .build(inputStream);
	        sqlSession = sessionFactory.openSession();
//	        personInfoMapper = sqlSession.getMapper(PersonInfoMapper.class);
	        pScheduleTaskMapper = sqlSession.getMapper(PScheduleTaskMapper.class);
	        sqlSession.clearCache();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			if(inputStream != null){
				try {
					inputStream.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				newFile.delete();
			}
		}
}

private static File getValue(String resource) throws XmlException, IOException{
		Resources.getResourceAsStream(resource);
		InputStream inputStream = null;
		try{
			inputStream = Resources.getResourceAsStream(resource);
			XmlObject xmlObject = XmlObject.Factory.parse(inputStream);
			Node node = xmlObject.getDomNode();
			NodeList nodeList = node.getChildNodes();
			if(nodeList != null){
				int length = nodeList.getLength();
				for(int index =0;index<length;index++){
					Node nodeIndex = nodeList.item(index);
					String localName = nodeIndex.getLocalName();
					if("configuration".equals(localName)){
						NodeList nodeList2 = nodeIndex.getChildNodes();
						int length2 = nodeList2.getLength();
						for(int index2 =0;index2<length2;index2++){
							Node nodeIndex2 =nodeList2.item(index2);
							String localName2 = nodeIndex2.getLocalName();
							if("environments".equals(localName2)){
								NodeList nodeList3 = nodeIndex2.getChildNodes();
								int length3 = nodeList3.getLength();
								for(int index3 = 0;index3<length3;index3++){
									Node nodeIndex3 = nodeList3.item(index3);
									String localName3 = nodeIndex3.getLocalName();
									if("environment".equals(localName3)){
										NodeList nodeList4 = nodeIndex3.getChildNodes();
										int length4 = nodeList4.getLength();
										for(int index4=0;index4<length4;index4++){
											Node node4 = nodeList4.item(index4);
											String localName4 = node4.getLocalName();
											if("dataSource".equals(localName4)){
												NodeList nodeList5 = node4.getChildNodes();
												int length5 = nodeList5.getLength();
												for(int index5 =0 ;index5<length5;index5++){
													Node node5 = nodeList5.item(index5);
													String localName5 = node5.getLocalName();
													if("property".equals(localName5) ){
														boolean isFlag = false;
														NamedNodeMap attributes = node5.getAttributes();
														for (int j = 0; j < attributes.getLength(); j++) {
									                        Node attribute = attributes.item(j);
									                        String attributeName = attribute.getNodeName();
									                        String value = attribute.getNodeValue();
									                        if(isFlag){
									                        	attribute.setNodeValue(AES256Util.decrypt(value));
									                        }
									                        if("name".equals(attributeName) && "password".equals(value)){
									                        	isFlag = true;
									                        }
									                    }
													}
												}
											}
										}
									}
								}
							}
						}
					}
				}
			}
			File folder = new File("C:\\temp");
			if(!folder.exists()){
				folder.mkdir();
			}
			File file = new File("C:\\temp\\mybatis-configuration.xml");
			xmlObject.save(file);
			return file;
		}catch(Exception e){
			throw new RuntimeException(e);
		}finally {
			if(inputStream != null){
				inputStream.close();
			}
		}
	}