手動獲取spring的ApplicationContext和bean對象
阿新 • • 發佈:2018-08-09
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WEB項目:
方法1:
?1 | ApplicationContext ac1 = WebApplicationContextUtils.getRequiredWebApplicationContext(ServletContext sc) |
方法2:
?1 | ApplicationContext ac2 = WebApplicationContextUtils.getWebApplicationContext(ServletContext sc) |
方法3:
?1 | 寫一個工具類類繼承ApplicationObjectSupport,並將這個加入到spring的容器 |
方法4:
?1 | 寫一個工具類類繼承WebApplicationObjectSupport,並將這個加入到spring的容器 |
方法5:(推薦)
?1 | 寫一個工具類實現ApplicationContextAware接口,並將這個加入到spring的容器 |
示例:
?123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354 | import java.util.Map; import org.springframework.beans.BeansException; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; /** * 獲取ApplicationContext和Object的工具類 * @author yzl * */ @SuppressWarnings ({ "rawtypes" , "unchecked" }) public class SpringContextUtils implements ApplicationContextAware { private static ApplicationContext applicationContext; public void setApplicationContext(ApplicationContext arg0) throws BeansException { applicationContext = arg0; } /** * 獲取applicationContext對象 * @return */ public static ApplicationContext getApplicationContext(){ return applicationContext; } /** * 根據bean的id來查找對象 * @param id * @return */ public static Object getBeanById(String id){ return applicationContext.getBean(id); } /** * 根據bean的class來查找對象 * @param c * @return */ public static Object getBeanByClass(Class c){ return applicationContext.getBean(c); } /** * 根據bean的class來查找所有的對象(包括子類) * @param c * @return */ public static Map getBeansByClass(Class c){ return applicationContext.getBeansOfType(c); } } |
非WEB項目
?1 | ApplicationContext ac = new FileSystemXmlApplicationContext( "applicationContext.xml" ) |
可選的操作方法有:
?1234567891011 | 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" ); 沒有classpath的話就是從當前的工作目錄 |
手動獲取spring的ApplicationContext和bean對象