Android程序内使用HttpURLConnection请求Restful资源

在Android项目使用HttpURLConnetion可以请求Restful资源，而其提供的setRequestProperty方法可以再请求头中加入其他所需信息，如Authorization等。代码如下：

package com.example.deng.firstapp.util;import android.util.Log;import org.json.JSONObject;import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.SocketTimeoutException;import java.net.URL;/** * Created by deng on 2017/5/1. */public class HttpUtil {    public static String executeGetMethod(String path, String authorization) {        String response = "";        try {            URL url = new URL(path);            HttpURLConnection connection = (HttpURLConnection) url.openConnection();            connection.setRequestProperty("Authorization", "Basic " + authorization);            connection.setRequestMethod("GET");            connection.setConnectTimeout(5000);            connection.setReadTimeout(5000);            connection.connect();            // 获得返回值            InputStream in = connection.getInputStream();            response = getResponse(in);            Log.i("response", response);            connection.disconnect();        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return response;    }    public static String executePostMethod(String path, JSONObject param) throws SocketTimeoutException {        String paramStr = param.toString();        String response = "";        try {            URL url = new URL(path);            HttpURLConnection connection = (HttpURLConnection) url.openConnection();            connection.setRequestMethod("POST");            connection.setDoInput(true);            connection.setDoOutput(true);            connection.setUseCaches(false);            connection.setConnectTimeout(5000);            connection.setReadTimeout(5000);            connection.setRequestProperty("Charset", "UTF-8");            connection.setRequestProperty("Content-Length", String.valueOf(paramStr.length()));            connection.setRequestProperty("Content-Type", "application/json");            connection.connect();            DataOutputStream out = new DataOutputStream(connection.getOutputStream());            // 写入请求的字符串            out.writeBytes(paramStr);            out.flush();            out.close();            // 获得返回值            InputStream in = connection.getInputStream();            response = getResponse(in);            connection.disconnect();        } catch (SocketTimeoutException e) {            throw e;        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return response;    }    private static String getResponse(InputStream in) {        BufferedReader reader = new BufferedReader(new InputStreamReader(in));        StringBuilder builder = new StringBuilder();        String line;        try {            while ((line = reader.readLine()) != null) {                builder.append(line);            }        } catch (IOException e) {            e.printStackTrace();        } finally {            try {                reader.close();            } catch (IOException e) {                e.printStackTrace();            }        }        return builder.toString();    }}

除此之外，推荐两款调用Restful资源的工具：

1、Chrome插件Postman：

2、IntelliJ IDEA内工具，点击Tools->Test RESTful Web Service可以打开：