一般来说, 需要按模块或类别   成多个小文件, 使事情更容易维护和模块化。 例如，

Spring3 JavaConfig它等效于 @Import 功能

package com.yiibai.config;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.Import;@Configuration@Import({ CustomerConfig.class, SchedulerConfig.class })public class AppConfig {}

@Import实例

请参阅使用 的一个完整的例子。

1. 目录结构

本实例目录结构。

2. Spring Beans

两个简单的Spring bean。

File : CustomerBo.java

package com.yiibai.core;public class CustomerBo {	public void printMsg(String msg) {		System.out.println("CustomerBo : " + msg);	}}

File : SchedulerBo.java

package com.yiibai.core;public class SchedulerBo {	public void printMsg(String msg) {		System.out.println("SchedulerBo : " + msg);	}}

3. @Configuration示例

现在，使用JavaConfig @Configuration声明上述Bean类。

File : CustomerConfig.java

package com.yiibai.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import com.yiibai.core.CustomerBo;@Configurationpublic class CustomerConfig {		@Bean(name="customer")	public CustomerBo customerBo(){				return new CustomerBo();			}}

File : SchedulerConfig.java

package com.yiibai.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import com.yiibai.core.SchedulerBo;@Configurationpublic class SchedulerConfig {		@Bean(name="scheduler")	public SchedulerBo suchedulerBo(){				return new SchedulerBo();			}	}

4. @Import示例

使用@Import加载多个配置文件。

File : AppConfig.java

package com.yiibai.config;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.Import;@Configuration@Import({ CustomerConfig.class, SchedulerConfig.class })public class AppConfig {}

5. 执行程序

加载主配置文件，并进行测试。

package com.yiibai.core;import org.springframework.context.ApplicationContext;import org.springframework.context.annotation.AnnotationConfigApplicationContext;import com.yiibai.config.AppConfig;public class App {	public static void main(String[] args) {		ApplicationContext context = new AnnotationConfigApplicationContext(				AppConfig.class);		CustomerBo customer = (CustomerBo) context.getBean("customer");		customer.printMsg("Hello 11");		SchedulerBo scheduler = (SchedulerBo) context.getBean("scheduler");		scheduler.printMsg("Hello 22");	}}

输出结果

CustomerBo : Hello 11SchedulerBo : Hello 22

下载代码 – 

 

http://www.yiibai.com/spring/spring-3-javaconfig-import-example.html