我正在向我的Web服务发送一个JSON对象,该服务也有内部JSON对象。我无法在我的网络服务中获取它。我的客户端代码如下
var courseDetails = '{"UserId": "abc","CourseId": "C1","CourseDetails":{"Id": "_26_1","Name": "Group task test (revised)","Description": "Sample Description"}}';
var obj = JSON.parse(courseDetails);
$http({
method: 'POST',
url: 'rest/DB/Save',
headers: {'Content-Type': 'application/json'},
data : courseDetails,
}).success(function (data){
$scope.status=data;
}).error(function(data, status, headers, config) {
alert("error");
});
并在我的网络服务中
@POST
@Path("/Save")
@Consumes({MediaType.APPLICATION_JSON})
@Produces({MediaType.TEXT_PLAIN})
public String autoSave(JSONObject obj) throws Exception{
PersonalisationDao p = new PersonalisationImpl();
System.out.println("Obj "+obj);
String result = "failure";
if(obj != null) {
String userId = (String) obj.get("UserId");
String courseId = (String) obj.get("CourseId");
String courseDetails = (String) obj.get("CourseDetails");
// Problem in fetching course Details
result = p.addDetails(userId, courseId, courseDetails);
}
return result;
}
通常它应该是一个JSON对象,但它抛出
SEVERE: The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to java.lang.String
我也尝试过使用JSONObject进行投射,但它仍然没有用。有什么建议吗?
答案 0 :(得分:0)
最初通过强制转换为LinkedHashMap,然后最终转换为字符串。
LinkedHashMap courseDetails = (LinkedHashMap) obj.get("CourseDetails");
String jsonCourseString = new Gson().toJson(courseDetails, Map.class);