Spring中加载xml配置文件的六种方式

Myth丶恋晨 2022-05-08 11:52 762阅读 0赞

一: XmlBeanFactory 引用资源  
Resource resource = new ClassPathResource(“appcontext.xml”);  
BeanFactory factory = new XmlBeanFactory(resource);

二: ClassPathXmlApplicationContext 编译路径  
ApplicationContext factory=new ClassPathXmlApplicationContext(“classpath:appcontext.xml”);  
// src目录下的  
ApplicationContext factory=new ClassPathXmlApplicationContext(“appcontext.xml”);  
ApplicationContext factory=new ClassPathXmlApplicationContext(new String\[\] \{“bean1.xml”,“bean2.xml”\});  
// src/conf 目录下的  
ApplicationContext factory=new ClassPathXmlApplicationContext(“conf/appcontext.xml”);  
ApplicationContext factory=new ClassPathXmlApplicationContext(“file:G:/Test/src/appcontext.xml”);

三: 用文件系统的路径  
ApplicationContext factory=new FileSystemXmlApplicationContext(“src/appcontext.xml”);  
//使用了 classpath: 前缀,作为标志, 这样,FileSystemXmlApplicationContext 也能够读入classpath下的相对路径  
ApplicationContext factory=new FileSystemXmlApplicationContext(“classpath:appcontext.xml”);  
ApplicationContext factory=new FileSystemXmlApplicationContext(“file:G:/Test/src/appcontext.xml”);  
ApplicationContext factory=new FileSystemXmlApplicationContext(“G:/Test/src/appcontext.xml”);

四: XmlWebApplicationContext是专为Web工程定制的。  
ServletContext servletContext = request.getSession().getServletContext();  
ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext );

五: 使用BeanFactory  
BeanDefinitionRegistry reg = new DefaultListableBeanFactory();  
XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(reg);  
reader.loadBeanDefinitions(new ClassPathResource(“bean1.xml”));  
reader.loadBeanDefinitions(new ClassPathResource(“bean2.xml”));  
BeanFactory bf=(BeanFactory)reg;

六：Web 应用启动时加载多个配置文件 【目前项目中xml比较多】  
通过ContextLoaderListener 也可加载多个配置文件，在web.xml文件中利用

<context-pararn>元素来指定多个配置文件位置，其配置如下: 
    <context-param> 
            <param-name>contextConfigLocation</param-name>
            <param-value>
                classpath:config/*.xml   //代表加载类路径下config下的所有xml文件
            </param-value>
     </context-param>

参考([https://blog.csdn.net/qq\_20662113/article/details/77103162][https_blog.csdn.net_qq_20662113_article_details_77103162])

[https_blog.csdn.net_qq_20662113_article_details_77103162]: https://blog.csdn.net/qq_20662113/article/details/77103162