自己拼接json字符串，现在用Gson来实现

 1 StringBuilder stringBuilder = new StringBuilder("[");
 2         String ssString;    
 3         ArrayList<CompetitionsByCity> ccs =competitionMapper.getCmptList(hashMap);
 4 
 5 for (CompetitionsByCity tmp:ccs)
 6         {
 7             
 8             stringBuilder.append("{\"cmptId\":"+"\""+tmp.getCmptId()+"\""+","+"\"cmptName\":"+"\""+tmp.getCmptName()+"\""+","+
 9                     "\"duration\":"+"\""+tmp.getDuration()+"\""+","+"\"cmptStarLevel\":"+"\""+tmp.getCmptStarLevel()+"\""+","+"\"cmptCapacity\":"+"\""+tmp.getCmptCapacity()+"\""+","+"\"cmptLength\":"+"\""+tmp.getCmptLength()+"\""+
10                     "\"cmptFavorByMe\":"+"\""+"0"+"\""+","+"\"imgId\":"+"\""+tmp.getImgId()+"\""+"},"); 
11             
12             //stringBuilder.append(stringBuilder);
13             
14         }

1 String ssString;
2         ArrayList<CompetitionsByCity> ccs = competitionMapper
3                 .getCmptList(hashMap);
4         Gson gson = new Gson();
5         String str = gson.toJson(ccs);
6         ssString = "\"size\":" + ccs.size() + "," + "\"cmptList\":" + str;
7         return ssString;