手动获取spring的ApplicationContext和bean对象
WEB项目:
方法1:
ApplicationContext ac1 = WebApplicationContextUtils.getRequiredWebApplicationContext(ServletContext sc)
方法2:
ApplicationContext ac2 = WebApplicationContextUtils.getWebApplicationContext(ServletContext sc)
方法3:
写一个工具类类继承ApplicationObjectSupport,并将这个加入到spring的容器
方法4:
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)
写一个工具类实现ApplicationContextAware接口,并将这个加入到spring的容器
示例:
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
ApplicationContext ac = new FileSystemXmlApplicationContext("applicationContext.xml")
可选的操作方法有:
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