Entry function
By ClassPathXmlApplicationContextstarting parent class constructor AbstractApplicationContextfunction refresh method
ClassPathXmlApplicationContextSource:
package org.springframework.context.support;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
public class ClassPathXmlApplicationContext extends AbstractXmlApplicationContext {
@Nullable
private Resource[] configResources;
public ClassPathXmlApplicationContext() {
}
public ClassPathXmlApplicationContext(ApplicationContext parent) {
super(parent);
}
public ClassPathXmlApplicationContext(String configLocation) throws BeansException {
this(new String[]{configLocation}, true, (ApplicationContext)null);
}
public ClassPathXmlApplicationContext(String... configLocations) throws BeansException {
this(configLocations, true, (ApplicationContext)null);
}
public ClassPathXmlApplicationContext(String[] configLocations, @Nullable ApplicationContext parent) throws BeansException {
this(configLocations, true, parent);
}
public ClassPathXmlApplicationContext(String[] configLocations, boolean refresh) throws BeansException {
this(configLocations, refresh, (ApplicationContext)null);
}
public ClassPathXmlApplicationContext(String[] configLocations, boolean refresh, @Nullable ApplicationContext parent) throws BeansException {
super(parent);
this.setConfigLocations(configLocations);
if (refresh) {
this.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, (ApplicationContext)null);
}
public ClassPathXmlApplicationContext(String[] paths, Class<?> clazz, @Nullable 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);
}
this.refresh();
}
@Nullable
protected Resource[] getConfigResources() {
return this.configResources;
}
}
ClassPathXmlApplicationContext(String configLocation) Using this general method, passing a string type xml file name, to specify a particular component through xml configuration file to instantiate the bean plant, i.e. the set of the Map in DefaultSingletonBeanRegistry
ClassPathXmlApplicationContext(String... configLocations)：It may be a plurality of incoming xml, fitted into the spring, bean plants
public ClassPathXmlApplicationContext(String[] configLocations, boolean refresh) :Incoming String array
@Test
public void TestXmlBean(){
ClassPathXmlApplicationContext context =new ClassPathXmlApplicationContext("classpath:xmlRegBean.xml");
Animal cat =context.getBean("cat", Cat.class);
cat.getName();
}
@Test
public void TestMultiXml(){
ClassPathXmlApplicationContext context =new ClassPathXmlApplicationContext("classpath:xmlRegBean.xml","classpath:xmlRegBean2.xml");
Animal cat =context.getBean("cat", Cat.class);
cat.getName();
System.out.println(cat);
Animal cat2 =context.getBean("cat2", Cat.class);
cat2.getName();
System.out.println(cat2);
}
@Test
public void TestArrayXml(){
String[] arrXml = {"classpath:xmlRegBean.xml","classpath:xmlRegBean2.xml"};
ClassPathXmlApplicationContext context =new ClassPathXmlApplicationContext(arrXml,true);
Animal cat =context.getBean("cat", Cat.class);
cat.getName();
System.out.println(cat);
Animal cat2 =context.getBean("cat2", Cat.class);
cat2.getName();
System.out.println(cat2);
}