【Java】URL实现网络资源下载

布满荆棘的人生 2023-02-26 02:11 28阅读 0赞

废话不多说，上代码。

package com.kuang.lesson04;
    
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.net.HttpURLConnection;
    import java.net.URL;
    
    public class UrlDown { 
        public static void main(String[] args) throws IOException { 
            //1、下载地址
            URL url = new URL("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1594642573535&di=93c60c575b141c737155d2f23007d33a&imgtype=0&src=http%3A%2F%2Fa1.att.hudong.com%2F05%2F00%2F01300000194285122188000535877.jpg");
    
            //2、连接到这个资源HTTP
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
    
            InputStream inputStream = urlConnection.getInputStream();
    
            FileOutputStream fos =  new FileOutputStream("小猫.jpg");
    
            byte[] buffer = new byte[1024];
            int len;
            while ((len=inputStream.read(buffer))!=-1) { 
                fos.write(buffer,0,len);//写出这个数据
            }
    
            fos.close();
            inputStream.close();
            urlConnection.disconnect();//断开连接
        }
    }

**运行结果：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDY2ODg5OA_size_16_color_FFFFFF_t_70]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDY2ODg5OA_size_16_color_FFFFFF_t_70 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDY2ODg5OA_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200713173603250.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDY2ODg5OA==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDY2ODg5OA_size_16_color_FFFFFF_t_70 1]: /images/20230209/138b4932d8b5403eac3b671ec0b57177.png