初始化list和map时就给它赋值

List

private List<String> list=new ArrayList<String>(){
  {
   add("nihao");
   add("wohao");
   add("dajihao");
  }
 };

Map

private static final Map<String, CrawlProjectService> crawlProjectMap = new HashMap<String, CrawlProjectService>();
	static {
		crawlProjectMap.put("a", new ACrawl());
		crawlProjectMap.put("b", new BCrawl());

	}