遇到这样一个问题，代码如下：

package com.wonders.stpt.organTree.util;import java.util.HashMap;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;import org.springframework.stereotype.Component;import com.wonders.stpt.organTree.service.TorganRelationService;@Component("organTreeUtil")public class OrganTreeUtil { private static HashMap<String,String> receiversMap = null; private static HashMap<String,String> configersMap = null; private static TorganRelationService torganRelationService; public static TorganRelationService getTorganRelationService() {  return torganRelationService; } @Autowired(required=false) public void setTorganRelationService(   @Qualifier("torganRelationService")TorganRelationService torganRelationService) {  OrganTreeUtil.torganRelationService = torganRelationService; }  static {  init(); }  public static void init(){  if(receiversMap==null){   //receiversMap = new HashMap<String, String>();   //receiversMap = (HashMap<String, String>) torganRelationService.getReceivers();  }  if(configersMap==null){   //configersMap = new HashMap<String, String>();   //configersMap = (HashMap<String, String>) torganRelationService.getConfigers();  } }  public static HashMap<String,String> getReceiversMap(){  synchronized(receiversMap){   if(receiversMap==null){    receiversMap = (HashMap<String, String>) torganRelationService.getReceivers();   }  }  return receiversMap; }  public static HashMap<String,String> getConfigersMap(){  synchronized(configersMap){   if(configersMap==null){    configersMap = (HashMap<String, String>) torganRelationService.getReceivers();   }  }  return configersMap; }  public static void refresh(){  receiversMap = null;  configersMap = null; } }

而报空指针的行数就是 调用service的地方。之后觉得可能是 执行到static块时，spring还未注入。。。

修改后，运行成功。