http协议GET方式获取图片

package com.http.get;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class HttpUtils {
    // 自定义的web服务器的资源
    private static String URL_PATH = "http://172.16.47.156:8080/myhttp/2.jpg";

    public HttpUtils() {
        // TODO Auto-generated constructor stub
    }

    public static void saveImageToDisk() throws IOException {
        InputStream inputStream = getInputStream();
        byte[] data = new byte[1024];
        int len = 0;
        FileOutputStream fileOutputStream = null;
        try {
            fileOutputStream = new FileOutputStream("D:\\Temp\\testhttp.jpg");
            while ((len = inputStream.read(data)) != -1) {
                fileOutputStream.write(data, 0, len);
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if (fileOutputStream != null) {
                try {
                    fileOutputStream.close();
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }

    }

    /**
     * 获得服务器端数据，以InputStream形式返回
     * 
     * @return
     * @throws IOException
     */
    public static InputStream getInputStream() throws IOException {
        InputStream inputStream = null;
        HttpURLConnection httpURLConnection = null;
        try {
            URL url = new URL(URL_PATH);
            if (url != null) {
                httpURLConnection = (HttpURLConnection) url.openConnection();
                // 设置连接网络的超时时间
                httpURLConnection.setConnectTimeout(3000);
                httpURLConnection.setDoInput(true);
                // 设置本次http请求使用get方式请求
                httpURLConnection.setRequestMethod("GET");
                int responseCode = httpURLConnection.getResponseCode();
                if (responseCode == 200) {
                    // 从服务器获得一个输入流
                    inputStream = httpURLConnection.getInputStream();
                }
            }
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return inputStream;
    }

    public static void main(String[] args) throws IOException {
        // 从服务器获得图片保存到本地
        saveImageToDisk();
        System.out.println("传输步骤完毕");
    }
}