通过url下载图片

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本文链接： https://blog.csdn.net/suchenbin/article/details/102491960

需求：通过url从服务器上获取图片，将图片转换成base64的字符串用来做业务。

代码：

package com.su.mybatis.oracle.controller;
 
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import org.apache.commons.codec.binary.Base64;

public class Test {
 
    public static void main(String[] args) {
        String imageBase64 = "";
        String path = "xxxxxxx";//图片url
        try {
            imageBase64 = getImageByPath(path);
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println(imageBase64);
        //TODO 做自己的业务
    }
    
    public static String getImageByPath(String path) throws IOException { 
        URL url = null;
        HttpURLConnection httpUrl = null; 
        InputStream in = null; 
        byte[] data = null;  
        try {
            url = new URL(path);
            httpUrl = (HttpURLConnection) url.openConnection(); 
            httpUrl.connect();             
            in = httpUrl.getInputStream(); 
            data = new byte[in.available()];  
            in.read(data);  
        } catch (IOException e) {  
            e.printStackTrace();
        } finally {
            if(in != null)
                in.close();  
        }  
        return data == null ? "" : Base64.encodeBase64String(data);  
   } 
}

如果有写的不对的地方，请大家多多批评指正，非常感谢！