Spring ClassPathXmlApplicationContext和FileSystemXmlApplicationContext

先说:ClassPathXmlApplicationContext

这个类,默认获取的是WEB-INF/classes/下的路径,也就是在myeclipse的src下的路径,所以用这个是获取不到WEB-INF下的配置文件的...

下面是几个用法,引src下的一个文件,有以下几种方式

Java代码








BeanFactory ac = new ClassPathXmlApplicationContext("applicationContext.xml"); BeanFactory ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml"); BeanFactory ac = new ClassPathXmlApplicationContext("classpath:/applicationContext.xml"); ac.getBean("beanID");

BeanFactory ac = new ClassPathXmlApplicationContext("applicationContext.xml");
BeanFactory ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
BeanFactory ac = new ClassPathXmlApplicationContext("classpath:/applicationContext.xml");
ac.getBean("beanID");

classpath:和classpath*:的区别:

classpath: 只能加载一个配置文件,如果配置了多个,则只加载第一个

classpath*: 可以加载多个配置文件,如果有多个配置文件,就用这个

引src下的多个文件,有以下几种方式

Java代码








BeanFactory ac = new ClassPathXmlApplicationContext(new String[]{"applicationContext.xml","applicationContext-test.xml"}); BeanFactory ac = new ClassPathXmlApplicationContext("classpath*:/applicationContext*.xml"); BeanFactory ac = new ClassPathXmlApplicationContext("classpath*:src/folder/applicationContext*.xml");

BeanFactory ac = new ClassPathXmlApplicationContext(new String[]{"applicationContext.xml","applicationContext-test.xml"});
BeanFactory ac = new ClassPathXmlApplicationContext("classpath*:/applicationContext*.xml");
BeanFactory ac = new ClassPathXmlApplicationContext("classpath*:src/folder/applicationContext*.xml");

再说:FileSystemXmlApplicationContext

这个类,默认获取的是项目路径,就是项目名的这级.但是我测试,在myeclipse下,执行main方法,获取配置文件,路径用WebRoot/WEB-INF/是没问题的,但是发布到tomcat下,就怎么配都不成功了,无奈,只能把配置文件全部移到src下了,因为担心发布到linux上后,又出现路径问题

下面是几个用法,引WEB-INF下的一个文件,有以下几种方式

Java代码








BeanFactory factory = new FileSystemXmlApplicationContext("WebRoot/WEB-INF/applicationContext.xml"); BeanFactory factory = new FileSystemXmlApplicationContext("file:D:/workspace/testproject/WebRoot/WEB-INF/applicationContext.xml");

BeanFactory factory = new FileSystemXmlApplicationContext("WebRoot/WEB-INF/applicationContext.xml");
BeanFactory factory = new FileSystemXmlApplicationContext("file:D:/workspace/testproject/WebRoot/WEB-INF/applicationContext.xml");

其中,FileSystemXmlApplicationContext的起始路径是项目路径,所以可以直接这样写WebRoot/WEB-INF

如果前边加了file:则说明后边的路径就要写全路径了,就是绝对路径

下面是几个用法,引WEB-INF/classes下的一个文件,有以下几种方式

Java代码








BeanFactory factory = new FileSystemXmlApplicationContext("classpath:applicationContext.xml");

BeanFactory factory = new FileSystemXmlApplicationContext("classpath:applicationContext.xml");

这其实跟ClassPathXmlApplicationContext是一样的,多个就加通配符

下面是几个用法,引WEB-INF下的多个文件,有以下几种方式

Java代码








BeanFactory factory = new FileSystemXmlApplicationContext(new String[]{"WebRoot/WEB-INF/applicationContext.xml","WebRoot/WEB-INF/applicationContext-test.xml"});

BeanFactory factory = new FileSystemXmlApplicationContext("WebRoot/WEB-INF/applicationContext*.xml");
BeanFactory factory = new FileSystemXmlApplicationContext("file:D:/workspace/testproject/WebRoot/WEB-INF/applicationContext*.xml");

BeanFactory factory = new FileSystemXmlApplicationContext(new String[]{"WebRoot/WEB-INF/applicationContext.xml","WebRoot/WEB-INF/applicationContext-test.xml"});
BeanFactory factory = new FileSystemXmlApplicationContext("WebRoot/WEB-INF/applicationContext*.xml");
BeanFactory factory = new FileSystemXmlApplicationContext("file:D:/workspace/testproject/WebRoot/WEB-INF/applicationContext*.xml");

引WEB-INF/classes下的多个文件,也是一样的

Java代码








BeanFactory factory = new FileSystemXmlApplicationContext(new String[]{"classpath:applicationContext.xml","classpath:applicationContext*.xml"});

BeanFactory factory = new FileSystemXmlApplicationContext("classpath*:applicationContext*.xml");