Java HttpURLConnection使用方法详解_Java教程

Java HttpURLConnection使用方法详解

2021-02-01 11:45taz372436 Java教程

这篇文章主要为大家详细介绍了Java HttpURLConnection使用方法，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

本文实例为大家分享了Java HttpURLConnection使用，供大家参考，具体内容如下

包括使用HttpURLConnection执行get/post请求

									package com.cn.testproject;

									import java.io.ByteArrayOutputStream;

									import java.io.IOException;

									import java.io.InputStream;

									import java.io.OutputStream;

									import java.net.HttpURLConnection;

									import java.net.URL;

									public class HttpConnectionUrlDemo {

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

									    //get();

									    post();

									  }

									  public static void get() throws Exception {

									    String path = "http://www.baidu.com";

									    URL url = new URL(path);

									    HttpURLConnection conn = (HttpURLConnection) url.openConnection();

									    conn.setConnectTimeout(5 * 1000);

									    conn.setRequestMethod("GET");

									    InputStream inStream = conn.getInputStream();

									    byte[] data = toByteArray(inStream);

									    String result = new String(data, "UTF-8");

									    System.out.println(result);

									  }

									  public static void post() throws Exception {

									    String encoding = "UTF-8";

									    //post的form参数(json兼职对)

									    String params = "[{\"addTime\":\"2011-09-19 14:23:02\"[],\"iccid\":\"1111\",\"id\":0,\"imei\":\"2222\",\"imsi\":\"3333\",\"phoneType\":\"4444\",\"remark\":\"aaaa\",\"tel\":\"5555\"}]";

									    String path = "http://www.baidu.com";

									    byte[] data = params.getBytes(encoding);

									    URL url = new URL(path);

									    HttpURLConnection conn = (HttpURLConnection) url.openConnection();

									    conn.setRequestMethod("POST");

									    conn.setDoOutput(true);

									    conn.setRequestProperty("Content-Type", "application/x-javascript; charset=" + encoding);

									    conn.setRequestProperty("Content-Length", String.valueOf(data.length));

									    conn.setConnectTimeout(5 * 1000);

									    OutputStream outStream = conn.getOutputStream();

									    outStream.write(data);

									    outStream.flush();

									    outStream.close();

									    System.out.println(conn.getResponseCode()); // 响应代码 200表示成功

									    if (conn.getResponseCode() == 200) {

									      InputStream inStream = conn.getInputStream();

									      String result = new String(toByteArray(inStream), "UTF-8");

									      System.out.println(result); // 响应代码 200表示成功

									    }

									  }

									  private static byte[] toByteArray(InputStream input) throws IOException {

									    ByteArrayOutputStream output = new ByteArrayOutputStream();

									    byte[] buffer = new byte[4096];

									    int n = 0;

									    while (-1 != (n = input.read(buffer))) {

									      output.write(buffer, 0, n);

									    }

									    return output.toByteArray();

									  }

									}