Question

怎么在applicationContext.xml文件中加载其它bean.xml文件或者引用bean.xml文件中的bean id

applicationContext.xml 在定义parent的时候有错误 p:接口的时not found daoContext.xml

Answer 1

一、利用ClassPathXmlApplicationContext,可以从classpath中读取XML文件
//读取一个文件
1. ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserDao userDao = (UserDao)context.getBean("userDao");
//读取多个文件
2.ClassPathXmlApplicationContext resource = new ClassPathXmlApplicationContext(new String[]
{"applicationContext-ibatis-oracle.xml","applicationContext.xml","applicationContext-data-oracle.xml"});
BeanFactory factory = resource; UserDao userDao = (UserDao) factory.getBean("userDao");
二、利用ClassPathResource,可以从classpath中读取XML文件
Resource cr = new ClassPathResource("applicationContext.xml");
BeanFactory bf=new XmlBeanFactory(cr);
UserDao userDao = (UserDao)bf.getBean("userDao");
三、利用XmlWebApplicationContext读取
XmlWebApplicationContext ctx = new XmlWebApplicationContext();
ctx.setConfigLocations(new String[] {"/WEB-INF/ applicationContext.xml");
ctx.setServletContext(pageContext.getServletContext());
ctx.refresh();
UserDao userDao = (UserDao ) ctx.getBean("userDao ");
四、利用FileSystemResource读取

Resource rs = new FileSystemResource("D:/tomcat/webapps/test/WEB-INF/classes/ applicationContext.xml");
BeanFactory factory = new XmlBeanFactory(rs);
UserDao userDao = (UserDao )factory.getBean("userDao");
注意:利用FileSystemResource，则配置文件必须放在project直接目录下，或者写明绝对路径，否则就会抛出找不到文件的异常
五、利用FileSystemXmlApplicationContext读取,可以指定XML定义文件的相对路径或者绝对路径来读取定义文件。
1.String[] path={"WebRoot/WEB-INF/applicationContext.xml","WebRoot/WEB-INF/applicationContext_task.xml"};
ApplicationContext context = new FileSystemXmlApplicationContext(path);
2. String path="WebRoot/WEB-INF/applicationContext*.xml";
ApplicationContext context = new FileSystemXmlApplicationContext(path);
3.ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:地址");

Answer 2

如果你的配置文件中有 parent 这个属性，那么你的类当做就必须得相应的父类的能把错误信息发上来吗?