ApplicationContext的三種實現方式
阿新 • • 發佈:2019-02-02
spring為ApplicationContext提供的3種實現分別是:
ClassPathXmlApplicationContext, FileSystemXmlApplicationContext,XmlWebApplicationContext,
其中 XmlWebApplicationContext是專為Web工程定製的。使用舉例如下:
1. FileSystemXmlApplicationContext
Java程式碼
- eg1.
- pplicationContext ctx = new FileSystemXmlApplicationContext("bean.xml"
Java程式碼
- eg2.
- String[] locations = {"bean1.xml", "bean2.xml", "bean3.xml"};
- ApplicationContext ctx = new FileSystemXmlApplicationContext(locations ); //載入多個配置檔案
Java程式碼
- eg3.
- ApplicationContext ctx =new FileSystemXmlApplicationContext("D:roject/bean.xml");//根據具體路徑載入檔案
2. ClassPathXmlApplicationContext
Java程式碼
- eg1.
- pplicationContext ctx = new ClassPathXmlApplicationContext("bean.xml");
Java程式碼
- eg2.
- String[] locations = {"bean1.xml", "bean2.xml", "bean3.xml"};
- ApplicationContext ctx = new ClassPathXmlApplication(locations);
- 注:其中FileSystemXmlApplicationContext和ClassPathXmlApplicationContext與BeanFactory的xml檔案定位方式一樣是基於路徑的。
3. XmlWebApplicationContext
Java程式碼
- eg1.
- ServletContext servletContext = request.getSession().getServletContext();
- ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext);