Question

我试图发送带有某些参数的JsonObject的发布请求以在db上创建用户，但是我总是收到HTTP 400-错误的请求。我试图覆盖getHeaders（），getBodyContent（），就像其他类似主题的答案所说的那样，但是我的代码仍然无法正常工作。我什至试图从头开始逐步遵循教程，只是看它是否可行，但是结果是一样的。

<!DOCTYPE html>
<html>

<head>
    <title></title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
    <meta charset="utf-8">
    <link rel="stylesheet" href="/stylesheets/style.css">
</head>

<body>
    <h1></h1>
    <h4>Sort by:</h4>
    <div class="row">
        <div class="column"><select id="level" style="margin-bottom:20px;" onchange="updateHeatMap()"><option value="class" selected>Class</option><option value="family">Family</option><option value="genus">Genus</option><option value="order">Order</option><option value="phylum">Phylum</option><option value="species">Species</option><option value="subclass">Subclass</option><option value="suborder">Suborder</option><option value="subphylum">Subphylum</option><option value="superphylum">Superphylum</option></select></div>
        <div
            class="column">
            <div id="thelevel"></div>
    </div>
    </div>
    <div id="heatmap"></div>
    <script src="https://d3js.org/d3.v5.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>
    <script src="javascripts/heatmap9.js"></script>
</body>

</html>

这是我的Web服务代码：

package com.example.sandrini.pokeagenda;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONException;
import org.json.JSONObject;

import java.util.HashMap;
import java.util.Map;

public class CreateTrainerActivity extends AppCompatActivity {

    private EditText registerUsername;
    private EditText registerEmail;
    private EditText registerPassword;
    private Button registerTrainerButton;
    private ProgressBar registerTrainerProgressbar;
    private static final String URL = "http://192.168.25.34:8081/PokedexWS/webresources/pokews/poke/insert/trainer";
    private static final String KEY_USERNAME = "username";
    private static final String KEY_EMAIL = "email";
    private static final String KEY_PASSWORD = "password";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_create_trainer);

        registerUsername = (EditText) findViewById(R.id.register_username);
        registerEmail = (EditText) findViewById(R.id.register_email);
        registerPassword = (EditText) findViewById(R.id.register_password);
        registerTrainerButton = (Button) findViewById(R.id.register_trainer_button);
        registerTrainerProgressbar = (ProgressBar) findViewById(R.id.register_trainer_progressbar);

        registerTrainerProgressbar.setVisibility(View.INVISIBLE);

        registerTrainerButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                registerTrainer();
                registerTrainerProgressbar.setVisibility(View.VISIBLE);
            }
        });
    }

    private void registerTrainer(){
        final String username = registerUsername.getText().toString();
        final String email = registerEmail.getText().toString();
        final String password = registerPassword.getText().toString();

        /*Map<String, String> params = new HashMap<>();
        params.put(KEY_USERNAME, username);
        params.put(KEY_EMAIL, email);
        params.put(KEY_PASSWORD, password);*/
        JSONObject jsonObject = new JSONObject();
        try{
            jsonObject.put(KEY_USERNAME, username);
            jsonObject.put(KEY_EMAIL, email);
            jsonObject.put(KEY_PASSWORD, password);
        } catch (JSONException e) {
            e.printStackTrace();
        }


        JsonObjectRequest jsonRequest = new JsonObjectRequest(Request.Method.POST, URL, jsonObject,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        Toast.makeText(getApplicationContext(), "Registered successfully", Toast.LENGTH_SHORT).show();
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show();
                    }
                }) {
            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                HashMap<String, String> headers = new HashMap<>();
                headers.put("Content-Type", "application/json; charset=utf-8");
                headers.put("User-agent", "My useragent");
                return headers;
            }
            @Override
            public String getBodyContentType() {
                return "application/json";
            }
        };

                RequestQueue requestQueue = Volley.newRequestQueue(this);
                requestQueue.add(jsonRequest);
    }


}

Volley JsonObject Post请求返回HTTP代码400

0 个答案: