JSON 与List转换类封装

import java.util.ArrayList;
import java.util.List;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
/**
 * json 与 list相关转换工具类
 * @author sgl
 */
public class JsonListUtil {
    
    /**
     * @Title: getListByJson 将json字符串转换成List对象
     * @param  json json字符串
     * @return List<String>
     */
    public static List<String> getListByJson(String json){
        try {
            if (json == null || "".equals(json)) {
                return null;
            }
            List<String> list = new ArrayList<String>();
            Gson gson = new Gson();
            list = gson.fromJson(json,
                    new TypeToken<List<String>>() {
                    }.getType());
            return list;
        } catch (Exception e) {
            try {
                throw new Exception("json to list error..");
            } catch (Exception e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
        }
        return null;
    }
    /**
    * @Title: getJsonStrByMap 
    * @Description: 将List对象转换成json字符串
    * @param  list
    * @return String  
     */
    public static String getJsonStrByList(List<String> list){
        try {
            Gson gson = new Gson();
            String json = gson.toJson(list);
            return json;
        } catch (Exception e) {
            e.getMessage();
        }
        return null; 
    }

}