HttpClient中的 Get 和 Post (一个待优化的WebUtil)

最新推荐文章于 2024-08-06 17:13:24 发布

hongyewell

最新推荐文章于 2024-08-06 17:13:24 发布

阅读量747

点赞数

CC 4.0 BY-SA版权

分类专栏： Android

本文链接：https://blog.youkuaiyun.com/HelloKitty520123/article/details/49361065

Android 专栏收录该内容

9 篇文章

订阅专栏

本文介绍了一种使用HTTP GET和POST方法，结合JSON格式进行新闻信息的获取与发布的实现过程，详细解释了如何通过Apache HttpClient库与JSON解析库完成这一任务。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

package com.example.util;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.util.Log;

import com.example.helloworld.NewsItem;


public class WebUtil {

         String myURL = "http://10.0.2.2:8080/helloworld/HelloData";

        public  List<NewsItem> getNewsInfo(){
            List<NewsItem> mList = new ArrayList<NewsItem>();

                try {
                    //HttpClient是一个接口，无法创建它的实例，通常情况下都会创建一个DefaultHttpClient的实例
                    HttpClient httpClient = new DefaultHttpClient();
                    HttpGet httpGet =  new HttpGet(myURL);
                    HttpResponse httpResponse = httpClient.execute(httpGet);

                    if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                        Log.i("yeye", "get运行了");
                        HttpEntity entity = httpResponse.getEntity();
                        String result = EntityUtils.toString(entity,"utf-8");
                        //JSON字符串解析
                        try {
                            JSONArray jsonArray = new JSONArray(result);
                            for (int i = 0; i < jsonArray.length(); i++) {
                                JSONObject nObject = (JSONObject) jsonArray.get(i);
                                NewsItem news = new NewsItem();
                                news.setTitle(nObject.getString("myTitle"));
                                news.setContent(nObject.getString("myContent"));
                                mList.add(news);
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                } catch (ClientProtocolException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            return mList;

        }

        public void postNewsInfo(){
            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost("http://10.0.2.2:8080/helloworld/PublishData");
            List<NameValuePair> mList = new ArrayList<NameValuePair>();
            mList.add(new BasicNameValuePair("title", "新标题呀"));
            mList.add(new BasicNameValuePair("content", "新内容呀"));

                try {
                    httpPost.setEntity(new UrlEncodedFormEntity(mList,"utf-8"));
                    HttpResponse response = httpClient.execute(httpPost);
                    if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                        Log.i("yeye", "post运行了");
                    }

                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                } catch (ClientProtocolException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }


        }

}