Android程序内使用HttpURLConnection请求Restful资源

最新推荐文章于 2024-07-10 03:14:42 发布

原创最新推荐文章于 2024-07-10 03:14:42 发布 · 4.7k 阅读

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这篇博客介绍了如何在Android应用中利用HttpURLConnection发送GET和POST请求到RESTful资源，详细展示了设置请求头和处理响应的过程。同时推荐了两个用于测试RESTful服务的工具：Chrome插件Postman和IntelliJ IDEA内置的Test RESTful Web Service。

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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：