手动获取spring的ApplicationContext和bean对象

WEB项目:

方法1:

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ApplicationContext ac1 = WebApplicationContextUtils.getRequiredWebApplicationContext(ServletContext sc)

 方法2:

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ApplicationContext ac2 = WebApplicationContextUtils.getWebApplicationContext(ServletContext sc)

 方法3:

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写一个工具类类继承ApplicationObjectSupport,并将这个加入到spring的容器

 方法4:

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写一个工具类类继承WebApplicationObjectSupport,并将这个加入到spring的容器

 方法5:(推荐)

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写一个工具类实现ApplicationContextAware接口,并将这个加入到spring的容器

 示例:

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import java.util.Map;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
 
/**
 * 获取ApplicationContext和Object的工具类
 * @author yzl
 *
 */
@SuppressWarnings({ "rawtypes", "unchecked" })
public class SpringContextUtils implements ApplicationContextAware {
    private static ApplicationContext applicationContext;
 
    public void setApplicationContext(ApplicationContext arg0)
            throws BeansException {
        applicationContext = arg0;
    }
 
    /**
     * 获取applicationContext对象
     * @return
     */
    public static ApplicationContext getApplicationContext(){
        return applicationContext;
    }
     
    /**
     * 根据bean的id来查找对象
     * @param id
     * @return
     */
    public static Object getBeanById(String id){
        return applicationContext.getBean(id);
    }
     
    /**
     * 根据bean的class来查找对象
     * @param c
     * @return
     */
    public static Object getBeanByClass(Class c){
        return applicationContext.getBean(c);
    }
     
    /**
     * 根据bean的class来查找所有的对象(包括子类)
     * @param c
     * @return
     */
    public static Map getBeansByClass(Class c){
        return applicationContext.getBeansOfType(c);
    }
}

 

 

非WEB项目

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ApplicationContext ac = new FileSystemXmlApplicationContext("applicationContext.xml")

可选的操作方法有:

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一:
String[]   path={"WebRoot/WEB-INF/applicationContext.xml","WebRoot/WEB-INF/applicationContext_task.xml"};
ApplicationContext context = new FileSystemXmlApplicationContext(path);
 
二:
String path="WebRoot/WEB-INF/applicationContext*.xml";
ApplicationContext context = new FileSystemXmlApplicationContext(path);
 
三:
ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:地址");
没有classpath的话就是从当前的工作目录

 

手动获取spring的ApplicationContext和bean对象

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