List转JSON字符串工具类

通过 jdbcTemplate.queryForList得到的list，这个list里存储的是ListOrderedMap对象，只有通过对ListOrderedMap遍历得到key value才能组成JSON字符串。下面是一个list<ListOrderedMap>转json串的工具类：

public class JSONUtil {
 /**
  * @param list:jdbcTemplate.queryForList()返回的List
  * @return
  */
 public static String getJsonString(List list){
  StringBuffer sb = new StringBuffer("[");
  if(list != null){
   for(int i=0;i<list.size();i++){
    sb.append("{");
    ListOrderedMap lstmp = new ListOrderedMap();
    lstmp  = (ListOrderedMap)list.get(i);
    
    Set<String> mpKey = lstmp.keySet();
    Iterator<String> it = mpKey.iterator();
    while(it.hasNext()){
     String key = it.next();
     String clmvl = lstmp.get(key)!=null?lstmp.get(key).toString():""; //获取列值
     sb.append("'"+key+"':"+"'"+clmvl+"',");
    }
    sb.deleteCharAt(sb.length()-1);
    if(i==list.size()-1){
     sb.append("}");
    }else{
     sb.append("},");
    }
   }
  }
  sb.append("]");
  return sb.toString().replaceAll("\n|\r", "");
 }
}