Java中HTTP通訊

標籤：

　　Java內建的get、post請求：

　　get請求方式：

package com.java;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;/** * java內建get請求方式 * @author yxm * */public class HttpGet {    public static void main(String[] args) {        new Get().start();    }    static class Get extends Thread{        @Override        public void run() {                try {                    URL url = new URL("http://fanyi.youdao.com/openapi.do?keyfrom=huhailang&key=557910319&type=data&doctype=xml&version=1.1&q=welcome");                    URLConnection connection = url.openConnection();                    InputStream is = connection.getInputStream();                    InputStreamReader isr = new InputStreamReader(is);                    BufferedReader br = new BufferedReader(isr);                                        String line;                    StringBuffer builder = new StringBuffer();                    while((line=br.readLine())!=null){                        builder.append(line);                    }                    br.close();                    isr.close();                    is.close();                    System.out.println(builder.toString());                                    } catch (MalformedURLException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }catch (IOException e) {                    // TODO: handle exception                }        }    }}

　　Java內建的post請求：

package com.java;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;/** * Java內建的post請求 * @author yxm * */public class HttpPost {    public static void main(String[] args) {        // TODO Auto-generated method stub        new Post().start();    }    static class Post extends Thread{        @Override        public void run() {                try {                    //http://fanyi.youdao.com/openapi.do?keyfrom=huhailang&key=557910319&type=data&doctype=xml&version=1.1&q=welcome                    URL url = new URL("http://fanyi.youdao.com/openapi.do");                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();                    connection.addRequestProperty("encoding", "UTF-8");                    connection.setDoOutput(true);                    connection.setDoInput(true);                    connection.setRequestMethod("POST");                                        OutputStream os = connection.getOutputStream();                    OutputStreamWriter osw = new OutputStreamWriter(os);                    BufferedWriter bw = new BufferedWriter(osw);                    bw.write("keyfrom=huhailang&key=557910319&type=data&doctype=xml&version=1.1&q=welcome");                    bw.flush();                                        InputStream is = connection.getInputStream();                    InputStreamReader isr = new InputStreamReader(is);                    BufferedReader br = new BufferedReader(isr);                                        String line;                    StringBuilder builder = new StringBuilder();                    while((line=br.readLine())!=null){                        builder.append(line);                    }                                        bw.close();                    osw.close();                    os.close();                    br.close();                    isr.close();                    is.close();                                                            System.out.println(builder.toString());                                    } catch (MalformedURLException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }catch (IOException e) {                    // TODO: handle exception                }        }    }}

　　Apache提供的HTTPclient，同樣也包含get和post兩種方式

　　get方式：

public class HttpGets {    public static void main(String[] args) {        new Get().start();    }        static class Get extends Thread{        HttpClient client = HttpClients.createDefault();        @Override        public void run() {                HttpGet get = new HttpGet("www.baidu.com");                                HttpResponse reponse = client.excute(get);                HttpEntity entity = response.getEntity();                String result = EntityUtils.toString("encoding","UTF-8");                                System.out.println(result);                    }    }}

　　post方式：

public class HttpPosts {    public static void main(String[] args) {        new Post().start();    }    static class Post extends Thread{        HttpClient client = HttpClients.createDefault();        @Override        public void run() {                HttpPost post = new HttpPost("http://fanyi.youdao.com/openapi.do");                                List<BasicNameValuePair> paramters = new ArrayList<>();                paramters.add(new BasicNameValuePair("keyform","huhailang"));                paramters.add(new BasicNameValuePair("key","557910319"));                paramters.add(new BasicNameValuePair("type","data"));                paramters.add(new BasicNameValuePair("doctype","xml"));                paramters.add(new BasicNameValuePair("version","1.1"));                paramters.add(new BasicNameValuePair("q","welcome"));                                post.setEntity(new UrlEncodedFormEntity(paramters,"UTF-8"));                HttpResponse reponse = client.excute(post);                HttpEntity entity = response.getEntity();                String result = EntityUtils.toString("encoding","UTF-8");                                System.out.println(result);                    }    }}

Java中HTTP通訊