Spring中ClassPathXmlApplication与FileSystemXmlApplicationContext的区别以及ClassPathXmlApplicationContext 的具

Posted 2020-10-12 博客园站长

一、ClassPathXmlApplicationContext 的具体路径


String s[] = System.getProperty("java.class.path").split(";");
for (String string : s) {
    System.out.println(string);
}

排除掉lib以及C盘的，最后指向的是 ../target/classes/


所以把spring的xml放到main/resources下，Build-->make project（ctrl+F9）一下，即可在target生成，这时候使用以下语句就可以了

ApplicationContext bf = new ClassPathXmlApplicationContext("applicationContext.xml");

二、ClassPathXmlApplicationContext 使用方法

public void testBean(){
    //单配置文件方式一
    BeanFactory beanFactory=new ClassPathXmlApplicationContext("applicationContext.xml");
    
    //单配置文件方式二
    BeanFactory beanFactory=new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
    
    //多个配置文件
    BeanFactory beanFactory=new ClassPathXmlApplicationContext(new String[]{"applicationContext.xml"});
    
    //绝对路径需加“file:”前缀
    BeanFactory beanFactory = new ClassPathXmlApplicationContext("file:E:\Workspace\idea_workspace\spring\springtest\src\main\resources\applicationContext.xml");

    TestBean bean= (TestBean) beanFactory.getBean("testBean");
    assertEquals("testStr",bean.getTestStr());
}

　　

三、FileSystemXmlApplicationContext使用方法

public void testBean(){

    //项目根目录
    BeanFactory beanFactory=new FileSystemXmlApplicationContext("applicationContext.xml");

    //classes目录
    BeanFactory beanFactory=new FileSystemXmlApplicationContext("classpath:applicationContext.xml");

    //项目路径相对路径
    BeanFactory beanFactory=new FileSystemXmlApplicationContext("src\\main\\resources\\applicationContext.xml");

    //多配置文件
    BeanFactory beanFactory=new FileSystemXmlApplicationContext(new String[]{"src\\main\\resources\\applicationContext.xml"});

    //绝对目录
    BeanFactory beanFactory=new FileSystemXmlApplicationContext(new String[]{"E:\\Workspace\\idea_workspace\\spring\\springtest\\src\\main\\resources\\applicationContext.xml"});

    TestBean bean= (TestBean) beanFactory.getBean("testBean");
    assertEquals("testStr",bean.getTestStr());
}