ApplicationContext应用上下文体系如下：
在实现类ClassPathXmlApplicationContext中其实并没有多少重要的操作，主要是在构造函数中配置Spring配置文件的路径：
public class DaoOperationMain {
public static void main(String[] args) {
ApplicationContext appCtx = new ClassPathXmlApplicationContext("applicationContext.xml");
}
}
具体的applicationContext.xml解析相关的操作都在父类refresh中进行操作。
ClassPathXmlApplicationContext的源码如下：
/**
* 并没有太多具体的操作，主要是初始化构造函数，主要的操作都在父类中
*/
public class ClassPathXmlApplicationContext extends AbstractXmlApplicationContext {
private Resource[] configResources;
public ClassPathXmlApplicationContext() {
}
public ClassPathXmlApplicationContext(ApplicationContext parent) {
super(parent);
}
public ClassPathXmlApplicationContext(String configLocation) throws BeansException {
this(new String[] {configLocation}, true, null);
}
public ClassPathXmlApplicationContext(String... configLocations) throws BeansException {
this(configLocations, true, null);
}
public ClassPathXmlApplicationContext(String[] configLocations, ApplicationContext parent) throws BeansException {
this(configLocations, true, parent);
}
public ClassPathXmlApplicationContext(String[] configLocations, boolean refresh) throws BeansException {
this(configLocations, refresh, null);
}
public ClassPathXmlApplicationContext(String[] configLocations, boolean refresh, ApplicationContext parent)
throws BeansException {
super(parent);
//设置spring的配置文件
setConfigLocations(configLocations);
if (refresh) {
//调用父类的refresh函数，进行一系列初始化
refresh();
}
}
public ClassPathXmlApplicationContext(String path, Class<?> clazz) throws BeansException {
this(new String[] {path}, clazz);
}
public ClassPathXmlApplicationContext(String[] paths, Class<?> clazz) throws BeansException {
this(paths, clazz, null);
}
public ClassPathXmlApplicationContext(String[] paths, Class<?> clazz, ApplicationContext parent)
throws BeansException {
super(parent);
Assert.notNull(paths, "Path array must not be null");
Assert.notNull(clazz, "Class argument must not be null");
this.configResources = new Resource[paths.length];
for (int i = 0; i < paths.length; i++) {
this.configResources[i] = new ClassPathResource(paths[i], clazz);
}
//调用父类的refresh函数，进行一系列初始化
refresh();
}
@Override
protected Resource[] getConfigResources() {
return this.configResources;
}
}
