httpurlconnection

最新推荐文章于 2025-06-07 09:42:46 发布

原创最新推荐文章于 2025-06-07 09:42:46 发布 · 278 阅读

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本文介绍了一个简单的Android应用程序实例，该程序通过HTTP POST请求从远程服务器获取星座运势数据，并使用Gson库解析JSON响应。展示了如何设置HTTPURLConnection进行网络通信、处理服务器返回的数据及UI线程交互。

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package com.example.day_05_httpurlconnection_;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.ListView;
import android.widget.Toast;

import com.example.day_05_httpurlconnection_.bean.Bean;
import com.google.gson.Gson;

public class MainActivity extends Activity {
// String path = "http://op.juhe.cn/onebox/news/query?q=普京盟友炮轰OPEC不团结称其影响油市的时代已终结&key=f2219bf102195209a3db41a58ce0b180";

String path = "http://web.juhe.cn:8080/constellation/getAll";
//给服务器传递的参数
String str="consName=狮子座&type=today&key=3ac9f31ff66b9746539472887b3799c3";

Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {};

};

private ListView listView;

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

listView = (ListView) findViewById(R.id.listView);

new Thread() {

public void run() {
geData();
};

}.start();

}

/**
*
*/
private void geData() {
// 设置接口地址
try {
URL url = new URL(path);

HttpURLConnection connection = (HttpURLConnection) url
.openConnection();

// 设置连接超时
connection.setConnectTimeout(5000);
// 设置读取超时
connection.setReadTimeout(5000);
// 设置请求方式
connection.setRequestMethod("POST");

//得到输出流,象服务器传递参数
OutputStream outputStream = connection.getOutputStream();

PrintWriter printWriter=new PrintWriter(outputStream);
//设置要传递的数据
printWriter.println(str);

printWriter.flush();

// 连接网络
connection.connect();
// 如果响应码等于200代表请求成功
if (connection.getResponseCode() == 200) {
// 得到服务器返回的信息,是流的形式返回回来的
InputStream inputStream = connection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(inputStream, "UTF-8"));

String str;
StringBuffer stringBuffer = new StringBuffer();
// 一次读一行
while ((str = bufferedReader.readLine()) != null) {
// 把读到的每一行信息都追加到stringBuffer里
stringBuffer.append(str);
}

String data = stringBuffer.toString();

// System.out.println(data);

// 将json数据转成对象
Gson gson = new Gson();

Bean bean = gson.fromJson(data, Bean.class);

System.out.println(bean.toString());
// 把对象通过handler发送给主线程
Message msg = Message.obtain();
// msg.obj = root;
// handler.sendMessage(msg);

} else {

Toast.makeText(this, " 请求失败 ", 0).show();

}

} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}