最近在專案中學習到，動態的載入配置檔案，就從網上查閱資料，整理了一篇部落格《Spring載入配置檔案》，大家可以看一下。

在這裡簡單記錄一下程式碼：

大家可以看到，專案中有這樣3個配置檔案

現在要實現的是，先載入spring-parent.xml檔案，然後再載入spring-one.xml和spring-two.xml檔案

package org.ygy.demo.spring.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.ygy.demo.spring.Module;
import org.ygy.demo.spring.service.AnotherService;
import org.ygy.demo.spring.service.OneService;

public class AppTest {
	public static void main(String[] args) {
		//1.載入父親上下文環境
		ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-parent.xml");
		
		//2.根據引數呼叫子類上下文環境
		Module module = new Module("core", applicationContext);
		
		OneService oneService = module.getBeanByName("oneService");
		oneService.sayOne();
		oneService.sayTwo();
		
		Module another = new Module("web" , applicationContext);
		
		AnotherService anotherService = another.getBean(AnotherService.class);
		anotherService.queryOne();
		anotherService.queryTwo();
	}
}
 

package org.ygy.demo.spring;

import java.util.Iterator;
import java.util.Map;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.google.common.base.Preconditions;

import lombok.Getter;

/**
 * 
 * @author yuguiyang
 * @description 模組類，專案中有多個模組或者子專案，可能會根據需要載入不同的配置檔案
 * @time 2013-9-2
 * @version V1.0
 */
public final class Module {
	
	@Getter
	private  ApplicationContext applicationContext;
	
	/**
	 * 
	 * @param moduleName 模組名稱
	 * @param parentContext 父親上下文
	 */
	public Module(String moduleName,ApplicationContext parentContext){
		//格式化配置檔案路徑
		String path = String.format("classpath*:com/deppon/dop/module/%s/**/META-INF/spring/*.xml", moduleName);
		applicationContext = new ClassPathXmlApplicationContext(new String[]{path},true,parentContext);
		Preconditions.checkNotNull(applicationContext);
	}
	
	@SuppressWarnings("unchecked")
	public <T> T getBeanByName(String name) {
		return (T) applicationContext.getBean(name);
	}
	
	
	public <T> T getBean(Class<T> beanClass) {
		Map<String, T> beanMap = applicationContext.getBeansOfType(beanClass);
		Iterator<T> iterator = beanMap.values().iterator();
		return iterator.hasNext() ? iterator.next() : null;
	}
	
}
 

package org.ygy.demo.spring.service;

public class OneService {
	
	public void sayOne() {
		System.out.println("-- from sayOne().");
	}
	
	public void sayTwo() {
		System.out.println("-- from sayTwo().");
	}
}

package org.ygy.demo.spring.service;

public class AnotherService {
	
	public void queryOne() {
		System.out.println("--from queryOne().");
	}
	
	public void queryTwo() {
		System.out.println("--from queryTwo().");
	}
}
 

先記錄到這，感覺有點兒不對勁兒，哪裡講的好像有問題......