Java从网络读取图片并保存至本地

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 {
 
    public static String URL_PATH = "http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eqok8iao3FYPhjUVFjgmeYCFB1sLYt1AtXWgtjZib7tYjHCQIXAKbuj5VnehXMaZMFvLIumrcJRGm1w/132";
 
    public HttpUtils() {
        // TODO Auto-generated constructor stub
    }
 
    //把从服务器获得图片的输入流InputStream写到本地磁盘
    public static void saveImageToDisk() {
 
        InputStream inputStream = getInputStream();
        byte[] data = new byte[1024];
        int len = 0;
        FileOutputStream fileOutputStream = null;
        try {
            fileOutputStream = new FileOutputStream("D:\\test1.png");
            while ((len = inputStream.read(data)) != -1) {
                fileOutputStream.write(data, 0, len);
 
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
 
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if (fileOutputStream != null) {
                try {
                    fileOutputStream.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
 
        }
 
    }
 
    // 从服务器获得一个输入流(本例是指从服务器获得一个image输入流)
    public static InputStream getInputStream() {
        InputStream inputStream = null;
        HttpURLConnection httpURLConnection = null;
 
        try {
            URL url = new URL(URL_PATH);
            httpURLConnection = (HttpURLConnection) url.openConnection();
            // 设置网络连接超时时间
            httpURLConnection.setConnectTimeout(3000);
            // 设置应用程序要从网络连接读取数据
            httpURLConnection.setDoInput(true);
 
            httpURLConnection.setRequestMethod("GET");
            int responseCode = httpURLConnection.getResponseCode();
            if (responseCode == 200) {
                // 从服务器返回一个输入流
                inputStream = httpURLConnection.getInputStream();
 
            }
 
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
 
        return inputStream;
 
    }
 
    public static void main(String args[]) {
        // 从服务器端获得图片，保存到本地
        saveImageToDisk();
    }
}