将`JSON`发布到`ArrayList`会产生一个空列表

时间:2015-06-11 17:58:34

标签: json arraylist resteasy

我在向JSON

发布ArrayList时遇到问题

我有课程计划

 public class Plan {
    private String planId;
    private String planName;
        :
        :
}

ArrayList计划 - 计划清单

public class PlanList {
    private List<Plan> plans = new ArrayList<Plan>();
        :
        :
}

我有以下POST和GET REST API

@POST
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public PlanList createPlans(@CookieParam(SmsHttpHeaders.X_SMS_AUTH_TOKEN) String token, PlanList plans, @HeaderParam("Organization-Id") String organizationIdByService);

@GET
@Produces(MediaType.APPLICATION_JSON)
public PlanList retrieveAllPlans(@CookieParam(SmsHttpHeaders.X_SMS_AUTH_TOKEN) String token, @HeaderParam("Organization-Id") String organizationIdByService);

我使用Postman发布以下JSON,遵循GET返回的相同格式。

{
  "plans": [
    {
      "planId":"1",
      "planName":"Plan 1"
    },
    {
      "planId":"2",
      "planName":"Plan 2"
    },
    {
      "planId":"3",
      "planName":"Plan 3"
    }
  ]
}

当我在createPlans()开头点击断点时,参数 plans 为空List
JSON格式不正确吗?我的REST定义是错误的吗?

1 个答案:

答案 0 :(得分:0)

您可以使用org.json库中的JSONObjectJSONArray

//instantiate plan1 
JSONObject plan1 = new JSONObject();
plan1.put("planId", 1);
plan1.put("planName", "Plan 1");

//or by passing a String if you want:
JSONObject plan2 = new JSONObject("{\"planId\":2, \"planName\":\"Plan 2\"}");

//put plan1 and plan2 in your Json array
JSONArray plans = new JSONArray();
plans.put(plan1);
plans.put(plan2);

System.out.println(plan1);
//returns: {"planName":"Plan 1","planId":1}

System.out.println(plans);
//returns: [{"planName":"Plan 1","planId":1},{"planName":"Plan 2","planId":1}]