使用HttpURLConnection下载图片

这是我学习了HttpURLConnection从网络获取资源的一个小例子，不多废话，直接上代码：

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

/**

 * 使用 HttpURLConnection 图片

 * @author Administrator

 *

 */

public class Demo3 {

public static void main(String[] args) {
InputStream is = null;
OutputStream os = null;
try {
//创建URL对象
URL url = new URL("https://www.baidu.com/img/bd_logo1.png");
//获取HttpURLConnection对象
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
//设置请求方式
urlConnection.setRequestMethod("GET");
//设置一个指定的超时值
urlConnection.setConnectTimeout(5000);
//打开到此URL引用资源的通信链接
urlConnection.connect();
//获取相应状态码
int code = urlConnection.getResponseCode();
System.out.println(code);
if(code == 200){ 
is = urlConnection.getInputStream();
os = new FileOutputStream("baidulogo1.png");
byte[] bytes = new byte[1024];
int len;
while((len = is.read(bytes))!= -1){
os.write(bytes,0,len);
os.flush();
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
try {
is.close();
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

}