不加载,手动实例化Service

//调用方法
private static IEntityService entityService=(IEntityService) BeanService.getBean("entityService");

 

//BeanService里面的方法
private static Map<String, Object> beans;
static {
  beans = new HashMap<String, Object>();
}
public static Object getBean(String beanName) {
  if (beans.containsKey(beanName) && beans.get(beanName) != null) {
    return beans.get(beanName);
  }
  Object bean = BeanUtil.getBean(beanName);
  if (bean != null) {
    beans.put(beanName, bean);
  }
  return bean;
}

 


 //BeanUtil里面的方法 

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.util.StringUtils;
public class BeanUtil {
  private static ClassPathXmlApplicationContext context;
  private static String flagInit = "0";
  /**
  * 获取spring上下文
  * 
  * @return 上下文容器
  */
  private static ApplicationContext getContext() {
  synchronized (flagInit) {
    if ("0".equals(flagInit)) {
      if (context == null) {
        ClassPathXmlApplicationContext context1 = new ClassPathXmlApplicationContext("spring-config.xml", "spring-mvc.xml");//分别是Spring和MVC的配置文件
        context = context1;
        context.start();
      }
      flagInit = "1";
    }
  }
  return context;

}

static {
getContext();
}



/**
* 获取bean
* 
* @param beanName
* @return
*/
public static Object getBean(String beanName) {
  if (StringUtils.isEmpty(beanName)) {
    return null;
  }
  if (getContext() == null) {
    return null;
  }
  return getContext().getBean(beanName);
  }
}
posted @ 2018-02-06 16:11  Ice_Blue_Brother  阅读(901)  评论(0编辑  收藏  举报