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import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import com.google.gson.Gson;
@WebServlet("/GetJSONUser")
public class GetJSONUser extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("##QUERY STRING(Get): "+request.getQueryString());
PrintWriter writer = response.getWriter();
Gson json = new Gson();
ArrayList<User> userList = UserService.GetUserList(getServletContext());
try{
JSONObject responseData = new JSONObject();
JSONArray cellArray = new JSONArray();
JSONArray cell = new JSONArray();
JSONObject cellObject = new JSONObject();
for(int i=0;i<userList.size();i++)
{
cellObject.put("id",i+1);
cell = new JSONArray();
cell.add(userList.get(i).id);
cell.add(userList.get(i).username);
cell.add(userList.get(i).roleId);
cellObject.put("cell", cell);
cellArray.add(cellObject);
}
responseData.put("page", 1);
responseData.put("total", 1);
responseData.put("records ", userList.size());
responseData.put("rows", cellObject);
String jsonReturn = json.toJson(responseData);
System.out.println(jsonReturn);
writer.print(jsonReturn);
}
catch(Exception e)
{
System.out.println(e);
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("##QUERY STRING: "+request.getParameterMap());
PrintWriter writer = response.getWriter();
Gson json = new Gson();
ArrayList<User> userList = UserService.GetUserList(getServletContext());
String jsonReturn = json.toJson(userList);
System.out.println(jsonReturn);
writer.print(jsonReturn);
}
}
錯誤:未找到不能創建一個新的JSONObject();我要去哪裏錯了
來源
連接不包含源文件ApplicationFilterChain.class
當它到達行的源代碼
JSONObject responseData = new JSONObject();
兩個Gson.jar和JSON-LIB-2.4-jdk15.jar在lib文件夾
但GSON的JSONArray只能添加一個Json元素 – 2012-03-15 05:53:53
JsonElement是一個基本的抽象類。所以你可以使用它的實現:JsonArray,JsonNull,JsonObject和JsonPrimitive。 – 2012-03-15 06:44:16
如何解決此行 cell = new JsonArray(); \t \t \t cell.add(userList.get(i).id); – 2012-03-15 09:30:14