package com.chalmers.httputils; import java.io.FileOutputStream; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; /** * @author Chalmers * @version 创建时间:2016年2月7日 下午6:13:11 */ public class HttpUtils { // 直接在本地开Tomcat进行下载 private String URL_PATH = "http://127.0.0.1:8080/load/aa.jpg"; public InputStream getInputStream() { InputStream inputStream = null; HttpURLConnection conn = null; try { // 连接网络 URL url = new URL(URL_PATH); // 获得HttpURLConnection对象 conn = (HttpURLConnection) url.openConnection(); conn.setDoInput(true); // 设置读取超时时间 conn.setReadTimeout(3000); // 设置连接超时时间 conn.setConnectTimeout(3000); // 设置连接方式 conn.setRequestMethod("GET"); // 获得返回code int code = conn.getResponseCode(); // 如果返回ok if (code == 200) { inputStream = conn.getInputStream(); } } catch (Exception e) { e.printStackTrace(); } return inputStream; } public void saveToDisk() { InputStream inputStream = getInputStream(); FileOutputStream fos = null; try { fos = new FileOutputStream("F://test.jpg"); byte[] buf = new byte[1024]; int len = -1; while ((len = inputStream.read(buf)) != -1) { // 往磁盘写入数据 fos.write(buf, 0, len); } fos.flush(); } catch (Exception e) { e.printStackTrace(); } finally { try { if (inputStream != null) { inputStream.close(); } if (fos != null) { fos.close(); } } catch (Exception e) { e.printStackTrace(); } } System.out.println("End"); } public static void main(String[] args) { new HttpUtils().saveToDisk(); } }
Java --- 使用HttpURLConnection连接网络
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