通过 Post 将 JSON 从 Java 发送到 PHP

Send JSON from Java to PHP through Post

提问by plasmy

I am doing an Android program that is supposed to send data from the tablet to a PHP Web Service. The code for sending the JSON:

我正在做一个 Android 程序，它应该将数据从平板电脑发送到 PHP Web 服务。发送 JSON 的代码：

package com.example.shvalidation;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;
import org.json.JSONObject;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;

public class MainMenuScreen extends Activity {
    //JSON Variables
    JSONParser jsonParser = new JSONParser();
    String pid;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_menu_layout);
        new TestThread().execute();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main_menu_layout, menu);
        return true;
    }

    public void PlantToDome(View view) {
        Intent intent = new Intent(this, SelectLocationScreen.class);
        startActivity(intent);
    }

    //Código del Web Service
    public class TestThread extends AsyncTask<Void, Void, Void> {
        ProgressDialog dialog;
        protected void onPreExecute() {
            dialog = ProgressDialog.show(MainMenuScreen.this, "Loading", "Loading data, please wait..");
        }

        private String convertStreamToString(InputStream is) {

            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
            StringBuilder sb = new StringBuilder();

            String line = null;
            try {
                while ((line = reader.readLine()) != null) {
                    sb.append(line + "\n");
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return sb.toString();
        }

        protected Void doInBackground(Void...args0) {
            try {
                HttpClient client = new DefaultHttpClient();
                HttpResponse response;
                HttpPost post = new HttpPost("http://192.168.1.101:8080/GetBook.php");

                JSONObject holder = new JSONObject();
                JSONObject euid = new JSONObject();
                euid.put("euid", 1);
                holder.accumulate("euids", euid);
                euid.put("euid", 2);
                holder.accumulate("euids", euid);

                post.setHeader("json", holder.toString());
                StringEntity se = new StringEntity(holder.toString());
                se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
                post.setEntity(se);
                response = client.execute(post);
                if (response != null) {
                    InputStream in = response.getEntity().getContent();

                    String a = convertStreamToString(in);
                    Log.i("Read from Server", a);
                }
            } catch (Exception e) {
                Log.d("error", e.toString());
            }
            return null;
        }

        protected void onPostExecute(Void unused) {
            dialog.dismiss();
        }
    }
}

The PHP Web Service:

PHP 网络服务：

<?php
    ob_start();

    var_dump(json_decode(file_get_contents('php://input')));

    $out = ob_get_contents();

    ob_end_clean();

    $f = fopen('out.txt', 'w+');

    fwrite($f, html_entity_decode($out));

    fclose($f);
?>

I have tried different methods for getting the JSON, but none of them have worked for me. Maybe the fine people of StackOverflow can help me out with this, as they always have for every other problem that I've had.

我尝试了不同的方法来获取 JSON，但没有一个对我有用。也许 StackOverflow 的优秀人员可以帮助我解决这个问题，因为他们对我遇到的所有其他问题总是如此。

回答by Brian Roach

From the comments section, it appears you only want the JSON being sent to your PHP script. Normally, you post POST this to PHP, and extract it:

从评论部分来看，您似乎只希望将 JSON 发送到您的 PHP 脚本。通常，您将 POST 发布到 PHP，然后提取它：

<?php
    print_r($_POST);
    $json_string = $_POST['message']; 
    $json = json_decode($json_string);
    print_r($json);
?>

And then a small client example:

然后是一个小客户端示例：

public static void main(String[] args) {

    String json = "{\"message\":\"This is a message\"}";

    HttpClient httpClient = new DefaultHttpClient();

    try {
        HttpPost request = new HttpPost("http://somesite.com/test.php");
        StringEntity params =new StringEntity("message=" + json);
        request.addHeader("content-type", "application/x-www-form-urlencoded");
        request.setEntity(params);
        HttpResponse response = httpClient.execute(request);

        // handle response here...

        System.out.println(org.apache.http.util.EntityUtils.toString(response.getEntity()));
        org.apache.http.util.EntityUtils.consume(response.getEntity());
    } catch (Exception ex) {
        // handle exception here
    } finally {
        httpClient.getConnectionManager().shutdown();
    }
}

The output of this is:

这个的输出是：

Array
(
    [message] => {"message":"This is a message"}
)
stdClass Object
(
    [message] => This is a message
)