自己简单封装spring容器

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
 * 服务提供核心类
 * 该类的主要作用是加载beans.xml文件
 * @author grace
 *
 */
public class ServiceProvinderCore {
  protected ApplicationContext ctx;
  /**
   * @param filename beans.xml
   */
  public void load(String filename){
    ctx=new ClassPathXmlApplicationContext(filename);
  }
}

import org.apache.commons.lang.xwork.StringUtils;
public class ServiceProvinder {
  private static ServiceProvinderCore sc;
//  封装方法：
//  ApplicationContext ctx=new ClassPathXmlApplicationContext("beans.xml");
//  静态方法，一调用该类就执行该方法
  static{
    sc=new ServiceProvinderCore();
    sc.load("beans.xml");
  }
//  封装方法：
//  ISysUserGroupService sysUserGroupService=(ISysUserGroupService) ctx.getBean(ISysUserGroupService.SERVICE_NAME);
  public static Object getService(String beanName){
    if(StringUtils.isBlank(beanName)){
      throw new RuntimeException("您要访问的服务名称不能为空");
    }
    Object bean=null;
    //如果spring容器中包含beanName
    if(sc.ctx.containsBean(beanName)){
      bean=sc.ctx.getBean(beanName);
    }
    //如果spring容器中不包含beanName
    if(bean==null){
      throw new RuntimeException("您要访问的服务名称["+beanName+"]不存在");
    }
    return bean;
  }
}

import java.util.List;
import org.junit.Test;
import cn.grace.container.ServiceProvinder;
import cn.grace.domain.SysUserGroup;
import cn.grace.service.ISysUserGroupService;
public class TestSysUserGroupService {
  @Test
  public void testSave() {
//    使用自己封装的spring容器拿到service
    ISysUserGroupService sysUserGroupService=(ISysUserGroupService)ServiceProvinder.getService(ISysUserGroupService.SERVICE_NAME);
//    原本的方法
//    ApplicationContext ctx=new ClassPathXmlApplicationContext("beans.xml");
//    ISysUserGroupService sysUserGroupService=(ISysUserGroupService) ctx.getBean(ISysUserGroupService.SERVICE_NAME);
    SysUserGroup sysUserGroup = new SysUserGroup();
    sysUserGroup.setName("销售部");
    sysUserGroup.setPrincipal("xxx");
    sysUserGroup.setIncumbent("ttt");
    sysUserGroupService.saveSysUserGroup(sysUserGroup);
  }
}

public interface ISysUserGroupService {
  public final static String  SERVICE_NAME="cn.grace.service.impl.SysUserGroupServiceImpl";
}