Spring中的service之间如何调用
时间:2011-03-26
在基于struts+spring+hibernate的开发框架下，一般service都是直接通过在Struts的action中getBean("yourServiceName")来获取，那么如果在serviceA中想调用serviceB中的方法该如何呢？
直接new 一个serviceB是不行的，因为里面可能还有依赖注入的dao等其他本来需要容器管理的资源，可以象在action中一样getBean()么？
获得applicationContext就可以了：
AppContext ： public class AppContext {
private static ApplicationContext applicationContext;
public static ApplicationContext getApplicationContext() {
return applicationContext;
}
public static void setApplicationContext(
ApplicationContext applicationContext) {
AppContext.applicationContext = applicationContext;
}
}
SpringService：
public class SpringBeanService {
private static SpringBeanService instance;
private ApplicationContext applicationContext;
public static synchronized SpringBeanService getInstance() {
if (instance == null) {
instance = new SpringBeanService();
}
return instance;
}
public ApplicationContext getApplicationContext() {
return this.applicationContext;
}
public void setApplicationContext(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
public UserService getUserService(){
return (UserService)AppContext.getApplicationContext().getBean("userService");
}
}
ApplicationContext的初始化：
public class ConfigLoadListener implements ServletContextListener {
public void contextInitialized(ServletContextEvent contextEvent) {
try {
WebApplicationContext context =WebApplicationContextUtils.getRequiredWebApplicationContext(contextEvent.getServletContext());
AppContext.setApplicationContext(context);
//读配置
try {
ServletContext context2=contextEvent.getServletContext();
String path=context2.getInitParameter("setting.properties");
InputStream in =context2.getResourceAsStream(path);
Properties properties = new Properties();
properties.load(in);
GlobalConstant.setCmdbProperties(properties);
in.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (HibernateException e) {
System.out.println("系统无法初始化,异常退出");
System.out.println(e);
}
}
public void contextDestroyed(ServletContextEvent contextEvent) {
}
}
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