4

jspからajax calを介して、json文字列をサーバーに渡し、jsonオブジェクトに変換しています。javaでjsonobjectをモデルクラスオブジェクトに変換するにはどうすればよいですか?

サーバーで私はこれをやっています：

 HttpServletRequest request = ServletActionContext.getRequest();
 String jsonData = request.getParameter("JsonData");
 JSONObject jsonDataObject = (JSONObject) JSONSerializer.toJSON( jsonData );

私のモデルクラスは次のようになります。

   public class Vehicles {

private List<Vehicle> vehicle;

public List<Vehicle> getVehicle() {
    return vehicle;
}

public void setVehicle(List<Vehicle> vehicle) {
    this.vehicle= vehicle;
}

    }

と

  public class Vehicle{
    private Integer vId;
   private String VName;
    private List<Department> department;
   //getters and setters;
    }

と

  public class Department{
    private Integer depId;
private String departmentName;
private List<Item> item;
   //getters and setters
   }

と

  public class Item{
  private Integer itemId;
  private String itemName;
  //getters and setters
   }

そして、jsonData Stringを次のように取得しています

{"vehicles":[{"vehicle":[{"department":[{"Item":[{"itemId":31,"itemName":"c7"},{"itemId":32,"itemName":"c2"}],"depId":21,"departmentName":"d1"}],"vId":11,"VName":"aaa"},{"department":[{"Item":[{"itemId":33,"itemName":"c3"},{"itemId":34,"itemName":"c4"}],"depId":22,"departmentName":"d2"},{"Item":[{"itemId":36,"itemName":"c1"}],"depId":24,"departmentName":"d3"}],"vId":12,"VName":"bbbb"},{"department":[{"Item":[{"itemId":30,"itemName":"c6"},{"itemId":35,"itemName":"c5"}],"depId":23,"departmentName":"d4"}],"vId":13,"VName":"cccc"},{"department":[{"Item":[{"itemid":37,"itemName":"c8","status":0}],"depId":25,"departmentName":"d5"}],"vId":14,"VName":"ddd"}]}]}

JavaでJSONObject jsonDataObject (またはString jsonData)をモデルクラスオブジェクト(つまり車両)に変換するにはどうすればよいですか?

4

2 に答える 2

5

これを使って..

  import org.codehaus.jackson.map.ObjectMapper;
  import org.json.JSONException;
  import org.json.JSONObject; 


HttpServletRequest request = ServletActionContext.getRequest();
Vehicles vehicles;
String jsonData = request.getParameter("JsonData");
jsonData = jsonData.substring(13, jsonData.length()-2);
ObjectMapper mapper = new ObjectMapper();
try{
    vehicles= mapper.readValue(jsonData, Vehicles.class);
}
catch (Exception e) {
    e.printStackTrace();
}
于 2012-08-16T10:04:37.300 に答える
1

(String jsonData) の変換には、Gson を好みます

そのような、

 Gson gsonObj = new Gson();
 Vehicles vehicles = gsonObj.fromJson(jsonData, Vehicles.class);
 iterate through this list
于 2012-08-10T07:38:43.877 に答える