Java 接收及;输出JSON错误消息
我创建了一个API,用于从数据库检索数据。现在,无论输入的凭据是否正确,我都能够从API检索状态、消息和数据。有两种版本的输出。我用POSTMan测试了一下,它似乎可以工作,但当我在Android上试用时,成功消息是可以的,但不是错误消息Java 接收及;输出JSON错误消息,java,android,json,list,hashmap,Java,Android,Json,List,Hashmap,我创建了一个API,用于从数据库检索数据。现在,无论输入的凭据是否正确,我都能够从API检索状态、消息和数据。有两种版本的输出。我用POSTMan测试了一下,它似乎可以工作,但当我在Android上试用时,成功消息是可以的,但不是错误消息 @POST @Path("/appdatas") public Response getSAppData(AppDataRequest adr) { Response data = ads.getSAppData(adr.getId(), adr.ge
@POST
@Path("/appdatas")
public Response getSAppData(AppDataRequest adr) {
Response data = ads.getSAppData(adr.getId(), adr.getEmail(), adr.getPassword());
return data;
}
@SuppressWarnings("unchecked")
public Response getSAppData(int id, String email, String password){
Map<String, AppData> AppDataHM = new HashMap<String, AppData>();
Map<String, Data> DataHM1 = new HashMap<String, Data>();
Map<String, List<String>> DataHM2 = new HashMap<String, List<String>>();
Map ADHMDHM = new HashMap<>();
Data data = DataHM.get(new AppDataRequest (id, email, password));
List<String> message = new ArrayList<>();
List<String> data2 = new ArrayList<>();
if(data != null){
message.add("");
AppDataHM.put("AppData", new AppData("success", message));
DataHM1.put("Data", data);
ADHMDHM.putAll(AppDataHM);
ADHMDHM.putAll(DataHM1);
String ADHMDHM1 = new Gson().toJson(ADHMDHM);
return Response.status(200).entity(ADHMDHM1).build();
}
else{
message.add("Your login information is invalid. Please try with the correct information");
AppDataHM.put("AppData", new AppData("error", message));
DataHM2.put("Data", data2);
ADHMDHM.putAll(AppDataHM);
ADHMDHM.putAll(DataHM2);
String ADHMDHM2 = new Gson().toJson(ADHMDHM);
return Response.status(500).entity(ADHMDHM2).build();
}
}
private void makeJsonObjectRequest(){
showpDialog();
String id1 = mEditTextID.getText().toString();
String email1 = mEditTextEmail.getText().toString().trim();
String password1 = mEditTextPassword.getText().toString();
HashMap<String, String> params = new HashMap<String, String>();
params.put("id", id1);
params.put("email", email1);
params.put("password", password1);
JsonObjectRequest request = new JsonObjectRequest(url, new JSONObject(params), new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONObject AppData = response.getJSONObject("AppData");
String status = AppData.getString("status");
String message = AppData.getString("message");
//JSONObject Data = response.getJSONObject("Data");
//String token = Data.getString("token");
jsonResponse = "";
jsonResponse += "Status: " + status + "\n";
jsonResponse += "\n";
jsonResponse += "Message: " + message + "\n";
//jsonResponse += "\n";
//jsonResponse += "Token: " + token + "\n";
mTextViewMain.setText(jsonResponse);
hidepDialog();
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getActivity(),
"Error: " + e.getMessage(),
Toast.LENGTH_SHORT).show();
}
hidepDialog();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error1: " + error.getMessage());
Toast.makeText(getActivity(),
"Error2: " + error.getMessage(), Toast.LENGTH_SHORT).show();
hidepDialog();
}
});
AppController.getInstance().addToRequestQueue(request);
}
当我在Android上应用下面的代码时,我能够检索成功的数据,但不能检索错误的数据
@POST
@Path("/appdatas")
public Response getSAppData(AppDataRequest adr) {
Response data = ads.getSAppData(adr.getId(), adr.getEmail(), adr.getPassword());
return data;
}
@SuppressWarnings("unchecked")
public Response getSAppData(int id, String email, String password){
Map<String, AppData> AppDataHM = new HashMap<String, AppData>();
Map<String, Data> DataHM1 = new HashMap<String, Data>();
Map<String, List<String>> DataHM2 = new HashMap<String, List<String>>();
Map ADHMDHM = new HashMap<>();
Data data = DataHM.get(new AppDataRequest (id, email, password));
List<String> message = new ArrayList<>();
List<String> data2 = new ArrayList<>();
if(data != null){
message.add("");
AppDataHM.put("AppData", new AppData("success", message));
DataHM1.put("Data", data);
ADHMDHM.putAll(AppDataHM);
ADHMDHM.putAll(DataHM1);
String ADHMDHM1 = new Gson().toJson(ADHMDHM);
return Response.status(200).entity(ADHMDHM1).build();
}
else{
message.add("Your login information is invalid. Please try with the correct information");
AppDataHM.put("AppData", new AppData("error", message));
DataHM2.put("Data", data2);
ADHMDHM.putAll(AppDataHM);
ADHMDHM.putAll(DataHM2);
String ADHMDHM2 = new Gson().toJson(ADHMDHM);
return Response.status(500).entity(ADHMDHM2).build();
}
}
private void makeJsonObjectRequest(){
showpDialog();
String id1 = mEditTextID.getText().toString();
String email1 = mEditTextEmail.getText().toString().trim();
String password1 = mEditTextPassword.getText().toString();
HashMap<String, String> params = new HashMap<String, String>();
params.put("id", id1);
params.put("email", email1);
params.put("password", password1);
JsonObjectRequest request = new JsonObjectRequest(url, new JSONObject(params), new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONObject AppData = response.getJSONObject("AppData");
String status = AppData.getString("status");
String message = AppData.getString("message");
//JSONObject Data = response.getJSONObject("Data");
//String token = Data.getString("token");
jsonResponse = "";
jsonResponse += "Status: " + status + "\n";
jsonResponse += "\n";
jsonResponse += "Message: " + message + "\n";
//jsonResponse += "\n";
//jsonResponse += "Token: " + token + "\n";
mTextViewMain.setText(jsonResponse);
hidepDialog();
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getActivity(),
"Error: " + e.getMessage(),
Toast.LENGTH_SHORT).show();
}
hidepDialog();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error1: " + error.getMessage());
Toast.makeText(getActivity(),
"Error2: " + error.getMessage(), Toast.LENGTH_SHORT).show();
hidepDialog();
}
});
AppController.getInstance().addToRequestQueue(request);
}
private void makeJsonObjectRequest(){
showpDialog();
字符串id1=mEditTextID.getText().toString();
字符串email1=mEditTextEmail.getText().toString().trim();
字符串password1=mEditTextPassword.getText().toString();
HashMap params=新的HashMap();
参数put(“id”,id1);
参数put(“电子邮件”,email1);
参数put(“密码”,password1);
JsonObjectRequest=新的JsonObjectRequest(url,新的JSONObject(参数),新的Response.Listener(){
@凌驾
公共void onResponse(JSONObject响应){
试一试{
JSONObject AppData=response.getJSONObject(“AppData”);
字符串状态=AppData.getString(“状态”);
String message=AppData.getString(“消息”);
//JSONObject Data=response.getJSONObject(“数据”);
//字符串标记=Data.getString(“标记”);
jsonResponse=“”;
jsonResponse+=“状态:”+Status+“\n”;
jsonResponse+=“\n”;
jsonResponse+=“消息:”+Message+“\n”;
//jsonResponse+=“\n”;
//jsonResponse+=“令牌:”+Token+“\n”;
mTextViewMain.setText(jsonResponse);
hidepDialog();
}捕获(JSONException e){
e、 printStackTrace();
Toast.makeText(getActivity(),
“错误:”+e.getMessage(),
吐司。长度(短)。show();
}
hidepDialog();
}
},new Response.ErrorListener(){
@凌驾
公共无效onErrorResponse(截击错误){
d(标记“Error1:+error.getMessage());
Toast.makeText(getActivity(),
Error2:“+error.getMessage(),Toast.LENGTH_SHORT).show();
hidepDialog();
}
});
AppController.getInstance().addToRequestQueue(请求);
}
如何才能获得“错误”输出中显示的输出并显示在TextView中
感谢大家查看此问题。您可以使用此问题为json生成具体的类。一旦有了具体的类,就可以使用将json文本转换为类。这样,您将拥有具体的json到类的映射。
这可能会有所帮助。对于
消息
请尝试以下操作:
JSONArray messageArray = AppData.getJSONArray("message");
String message = messageArray.toString();
为什么在脚本中返回状态500?截击假设代码500为错误
return Response.status(500).entity(ADHMDHM2).build();
尝试将其更改为200,然后选中Hi@AshwaniK你的“具体课程”和TODO课程类似吗?如果你说的是Java的“类”,我的Java程序中已经有了它,但我的Android程序没有。我应该将“具体类”添加到我的Android程序中吗?具体类指的是您想要将json响应转换为的类。通常,将类映射到json有助于提高可读性和可维护性;这不是字符串,这是jsonArray。在文本视图中设置之前是否打印过消息字符串?是否有任何答案帮助?嗨@谢谢你的评论。我已经尝试过getString和getJSONArray方法,它们都适合我@Chetan也感谢您的评论。打印消息字符串意味着什么?你能帮我详细说明一下吗?嗨@谢谢你的回复。你的回答确实解决了我的问题。现在,我面临的问题是,如何才能在TextView上显示空数组?你能帮帮我吗?嗨@FerdousAhamed我尝试了getString和getJSONArray,它们都正常工作,并给出了相同的预期输出。这段代码可能无法解决我的问题,但它确实帮助我改进代码,因为我将数组的所有toString代码替换为toJSONArray。谢谢你的帮助。现在我面临显示空数组的问题。你能帮我一下吗?