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发送GET请求

package demo;import java.io.*;import java.net.HttpURLConnection;import java.net.URL;public class HttpDemo {
       public static void main(String[] args) throws IOException {
           String url = "https://www.baidu.com/";        // 得到connection对象        URL httpUrl = new URL(url);        HttpURLConnection connection = (HttpURLConnection) httpUrl.openConnection();                //连接        connection.connect();                // 获取状态码 响应结果        if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
               InputStream inputStream = connection.getInputStream();            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));            String line = null;            StringBuffer buffer = new StringBuffer();            while ((line = reader.readLine()) != null) {
                   buffer.append(line);            }            reader.close();            System.out.println(buffer.toString());        }        // 断开连接        connection.disconnect();    }}

发送POST请求

package demo;import java.io.*;import java.net.HttpURLConnection;import java.net.URL;public class HttpDemo {
       public static void main(String[] args) throws IOException {
           String url = "http://httpbin.org/post";        //得到connection对象        URL httpUrl = new URL(url);        HttpURLConnection connection = (HttpURLConnection) httpUrl.openConnection();        //设置请求方式        connection.setRequestMethod("POST");        connection.setDoOutput(true);        // 设置请求头        connection.setRequestProperty("Accept", "*/*");        // 设置请求体        String body = "name=Tom&age=23";        OutputStream outputStream = connection.getOutputStream();        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));        writer.write(body);        writer.close();        //连接        connection.connect();        // 获取状态码 响应结果        if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
               InputStream inputStream = connection.getInputStream();            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));            String line = null;            StringBuffer buffer = new StringBuffer();            while ((line = reader.readLine()) != null) {
                   buffer.append(line);            }            reader.close();            System.out.println(buffer.toString());        }        // 断开连接        connection.disconnect();    }}

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