原文链接:http://blog.csdn.net/a9529lty/article/details/42145545
1、servlet方式加载时,
【web.xml】
- <servlet>
- <servlet-name>springMVC</servlet-name>
- <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
- <init-param>
- <param-name>contExtConfigLocation</param-name>
- <param-value>classpath*:/springMVC.xml</param-value>
- </init-param>
- <load-on-startup>1</load-on-startup>
- </servlet>
spring容器放在ServletContext中的key是org.springframework.web.servlet.FrameworkServlet.CONTEXT.springMVC
注意后面的springMVC,是你的servlet-name配置的值,注意适时修改。
- ServletContext sc=略
- WebApplicationContext attr = (WebApplicationContext)sc.getAttribute("org.springframework.web.servlet.FrameworkServlet.CONTEXT.springMVC");
2、listener方式加载时:
【web.xml】
- <context-param>
- <param-name>contextConfigLocation</param-name>
- <param-value>/WEB-INF/applicationContext</param-value>
- </context-param>
-
- <listener>
- <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
- </listener>
【jsp/servlet】可以这样取得
- ServletContext context = getServletContext();
- WebApplicationContext applicationContext = WebApplicationContextUtils .getWebApplicationContext(context);
3、通用的方法来了,神器啊,前的 1、2两种方法并不通用,可以抛弃了。
在配置文件中加入:
- <bean class="com.xxxxx.SpringContextHolder" lazy-init="false" />
- import org.springframework.context.ApplicationContext;
- import org.springframework.context.ApplicationContextAware;
- public class SpringContextHolder implements ApplicationContextAware {
- private static ApplicationContext applicationContext;
-
- public void setApplicationContext(ApplicationContext applicationContext) {
- SpringContextHolder.applicationContext = applicationContext;
- }
-
- public static ApplicationContext getApplicationContext() {
- checkApplicationContext();
- return applicationContext;
- }
-
- @SuppressWarnings("unchecked")
- public static <T> T getBean(String name) {
- checkApplicationContext();
- return (T) applicationContext.getBean(name);
- }
-
- @SuppressWarnings("unchecked")
- public static <T> T getBean(Class<T> clazz) {
- checkApplicationContext();
- return (T) applicationContext.getBeansOfType(clazz);
- }
-
- public static void cleanApplicationContext() {
- applicationContext = null;
- }
-
- private static void checkApplicationContext() {
- if (applicationContext == null) {
- throw new IllegalStateException("applicaitonContext未注入,请在applicationContext.xml中定义SpringContextHolder");
- }
- }
- }
转:如何取得Spring管理的bean
原文:http://www.cnblogs.com/SYrecord/p/6113208.html