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

WEB项目:

方法1:

?
1
ApplicationContext ac1 = WebApplicationContextUtils.getRequiredWebApplicationContext(ServletContext sc)

 方法2:

?
1
ApplicationContext ac2 = WebApplicationContextUtils.getWebApplicationContext(ServletContext sc)

 方法3:

?
1
写一个工具类类继承ApplicationObjectSupport,并将这个加入到spring的容器

 方法4:

?
1
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)

?
1
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

?
1
ApplicationContext ac = new FileSystemXmlApplicationContext( "applicationContext.xml" )

可选的操作方法有:

?
1
2
3
4
5
6
7
8
9
10
11
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

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转载自www.cnblogs.com/jpfss/p/9447902.html