{"id":4409,"date":"2019-05-13T22:46:45","date_gmt":"2019-05-13T14:46:45","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=4409"},"modified":"2019-05-13T22:46:45","modified_gmt":"2019-05-13T14:46:45","slug":"java%e4%b8%ad%e5%a6%82%e4%bd%95%e5%8f%91%e8%b5%b7http%e8%af%b7%e6%b1%82","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/4409.html","title":{"rendered":"Java\u4e2d\u5982\u4f55\u53d1\u8d77HTTP\u8bf7\u6c42"},"content":{"rendered":"\n

=Start=<\/p>\n\n\n\n

\u7f18\u7531\uff1a<\/h4>\n\n\n\n

\u4e4b\u524d\u5728\u5b66\u4e60Java\u7684\u65f6\u5019\u5c31\u8bf4\u8981\u6574\u7406\u4e00\u7bc7\u5982\u4f55\u8fdb\u884cHTTP\u64cd\u4f5c\u7684\u6587\u7ae0\uff0c\u4e0d\u8fc7\u4e00\u76f4\u90fd\u6ca1\u6709\u5199\u597d\uff0c\u8fd9\u4e24\u5929\u521a\u597d\u60f3\u5230\u4e86\u9a8c\u8bc1\u7684\u65b9\u6cd5\uff0c\u6240\u4ee5\u6574\u4e2a\u8fc7\u7a0b\u5f88\u5feb\u5c31OK\u4e86\uff0c\u5728\u6b64\u8bb0\u5f55\u4e00\u4e0b\uff0c\u65b9\u4fbf\u4ee5\u540e\u53c2\u8003\u3002<\/p>\n\n\n\n

\u6b63\u6587\uff1a<\/h4>\n\n\n\n

\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n\n\n\n
1\u3001\u4f7f\u7528 HttpURLConnection<\/h6>\n\n\n\n
package com.ixyzero.learn.utils;

import javax.net.ssl.HttpsURLConnection;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

\/**
 * Created by ixyzero on 2019\/5\/11.
 *\/
public class HttpURLConnectionExample {

    private final String USER_AGENT = \"Mozilla\/5.0\";

    public static void main(String[] args) throws Exception {

        HttpURLConnectionExample http = new HttpURLConnectionExample();

        System.out.println(\"Testing 1 - Send Http GET request\");
        http.sendGet();

        System.out.println(\"\\nTesting 2 - Send Http POST request\");
        http.sendPost();

    }

    \/\/ HTTP GET request
    private void sendGet() throws Exception {

        String url = \"https:\/\/httpbin.org\/get?q=test\";

        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();

        \/\/ optional default is GET
        con.setRequestMethod(\"GET\");

        \/\/add request header
        con.setRequestProperty(\"User-Agent\", USER_AGENT);

        int responseCode = con.getResponseCode();
        System.out.println(\"\\nSending 'GET' request to URL : \" + url);
        System.out.println(\"Response Code : \" + responseCode);

        BufferedReader in = new BufferedReader(
                new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        System.out.println(response.toString());
    }

    \/\/ HTTP POST request
    private void sendPost() throws Exception {

        String url = \"https:\/\/httpbin.org\/post\";
        URL obj = new URL(url);
        HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();

        \/\/add reuqest header
        con.setRequestMethod(\"POST\");
        con.setRequestProperty(\"User-Agent\", USER_AGENT);
        con.setRequestProperty(\"Accept-Language\", \"en-US,en;q=0.5\");

        String urlParameters = \"sn=123&id=12345\";

        \/\/ Send post request
        con.setDoOutput(true);
        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
        wr.writeBytes(urlParameters);
        wr.flush();
        wr.close();

        int responseCode = con.getResponseCode();
        System.out.println(\"\\nSending 'POST' request to URL : \" + url);
        System.out.println(\"Post parameters : \" + urlParameters);
        System.out.println(\"Response Code : \" + responseCode);

        BufferedReader in = new BufferedReader(
                new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        System.out.println(response.toString());
    }

}<\/pre>\n\n\n\n
2\u3001\u4f7f\u7528 HttpClient<\/h6>\n\n\n\n
package com.ixyzero.learn.utils;

import org.apache.http.HttpResponse;
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.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

\/**
 * Created by ixyzero.com on 2019\/5\/11.
 *\/
public class HttpUtils {

    private static String getURL = \"http:\/\/httpbin.org\/get?q=test\";
    private static String postURL = \"https:\/\/httpbin.org\/post\";
    private static String USER_AGENT = \"Mozilla\/5.0\";
    private static int TIMEOUT = 50;

    public String httpGet(String url) {
        HttpClient client = HttpClientBuilder.create().build();
        HttpGet request = new HttpGet(url);
        request.addHeader(\"User-Agent\", USER_AGENT);
        StringBuffer result = new StringBuffer();

        try {
            HttpResponse response = client.execute(request);
            System.out.println(\"Response Code : \"
                    + response.getStatusLine().getStatusCode());

            BufferedReader rd = new BufferedReader(
                    new InputStreamReader(response.getEntity().getContent()));

            String line;
            while ((line = rd.readLine()) != null) {
                result.append(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        return result.toString();
    }

    public String httpPost(String url, Map<String, String> mapParam) {
        StringBuffer result = new StringBuffer();

        HttpClient client = HttpClientBuilder.create().build();
        HttpPost post = new HttpPost(url);
        post.setHeader(\"User-Agent\", USER_AGENT);

        List<NameValuePair> urlParameters = new ArrayList<>();
        for (Map.Entry<String, String> entry : mapParam.entrySet()) {
            urlParameters.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
        }

        try {
            post.setEntity(new UrlEncodedFormEntity(urlParameters));

            HttpResponse response = client.execute(post);
            System.out.println(\"Response Code : \"
                    + response.getStatusLine().getStatusCode());

            BufferedReader rd = new BufferedReader(
                    new InputStreamReader(response.getEntity().getContent()));
            String line;
            while ((line = rd.readLine()) != null) {
                result.append(line);
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return result.toString();
    }

    public static void main(String[] args) {
        HttpUtils httpUtils = new HttpUtils();
        String response;

        response = httpUtils.httpGet(getURL);
        System.out.println(String.format(\"URL: %s\\nResponse:\\n%s\\n\", getURL, response));

        Map<String, String> map = new HashMap<String, String>() {
            {
                put(\"name\", \"test\");
                put(\"age\", \"20\");
            }
        };
        System.out.println(map);
        response = httpUtils.httpPost(postURL, map);
        System.out.println(String.format(\"URL: %s\\nResponse:\\n%s\\n\", postURL, response));

    }
}<\/pre>\n\n\n\n
&<\/p>\n\n\n\n
<dependency>
    <groupId>org.apache.httpcomponents<\/groupId>
    <artifactId>httpclient<\/artifactId>
    <version>4.4.1<\/version>
<\/dependency><\/pre>\n\n\n\n
3\u3001\u501f\u52a9 https:\/\/httpbin.org\/<\/a>\u9a8c\u8bc1\u6548\u679c<\/h6>\n\n\n\n
\u8be5\u7f51\u7ad9\u4f1a\u628a\u4f60\u7ed9\u5b83\u53d1\u51fa\u7684\u8bf7\u6c42\u4fe1\u606f\u6253\u51fa\u6765\uff0c\u65b9\u4fbf\u4f60\u9a8c\u8bc1\u53c2\u6570\u548c\u8bbe\u7f6e\u662f\u5426\u6b63\u786e\uff0c\u4e0a\u9762\u7684POST\u4fe1\u606f\u5982\u4e0b\uff08\u5305\u542b\u8bf7\u6c42\u5185\u5bb9\u3001\u8bf7\u6c42\u5934\u4fe1\u606f\u3001\u5916\u7f51IP\u7b49\uff09\uff1a<\/p>\n\n\n\n
{
  \"args\": {},
  \"data\": \"\",
  \"files\": {},
  \"form\": {
    \"age\": \"20\",
    \"name\": \"test\"
  },
  \"headers\": {
    \"Accept-Encoding\": \"gzip,deflate\",
    \"Content-Length\": \"16\",
    \"Content-Type\": \"application\/x-www-form-urlencoded\",
    \"Host\": \"httpbin.org\",
    \"User-Agent\": \"Mozilla\/5.0\"
  },
  \"json\": null,
  \"origin\": \"x1.x2.x3.x4, x1.x2.x3.x4\",
  \"url\": \"https:\/\/httpbin.org\/post\"
}<\/pre>\n\n\n\n
4\u3001\u5982\u4f55\u89e3\u6790\u8fd4\u56de\u7684json\u6570\u636e<\/h6>\n\n\n\n
\u5728Java\u4e2d\u5904\u7406json\u6570\u636e\u65f6\uff0c\u6211\u4e00\u822c\u7528\u7684\u662fAlibaba\u7684fastjson\u5e93\uff0c\u6240\u4ee5\u8fd9\u91cc\u4e5f\u7528\u8fd9\u4e2a\u5e93\u7684\u76f8\u5173\u65b9\u6cd5\u8fdb\u884c\u8bf4\u660e\uff1a<\/p>\n\n\n\n
\/\/ \u5f53response\u4e3ajson\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\u65f6\uff0c\u76f4\u63a5\u5c06\u5176\u4f20\u7ed9JSONObject.parseObject\u65b9\u6cd5\u8fdb\u884c\u89e3\u6790\u5373\u53ef\u5f97\u5230\u5bf9\u5e94\u7684json\u5bf9\u8c61\nJSONObject jsonObj = JSONObject.parseObject(response);<\/pre>\n\n\n\n
\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n\n\n\n