java访问https链接下载图片

java访问https链接下载图片

一、通过maven引入https工具包

<dependency>
      <groupId>org.apache.httpcomponentsgroupId>
      <artifactId>httpclientartifactId>
      <version>4.5.13version>
    dependency>
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二、https链接下载文件工具类

package com.mhx.info.service;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;
import org.junit.Test;

import java.io.FileOutputStream;
import java.io.InputStream;


/**
 * @Description: https文件链接下载文件
 * @BelongsProject: mhxFileDownload
 * @BelongsPackage: com.mhx.info.service
 * @ClassName: BatchDownloadFile
 * @Author: MHX
 * @CreateTime: 2022/11/25
 */
public class BatchDownloadFileTest {

    /**
     * https来获得
     *
     * @throws Exception 异常
     */
    @Test
    public void httpsToGet() throws Exception {
//        文件下载存储路径
        String savePath = "D:/zhxcmfs/myFiles";
//        文件命名
        String fileName = "图片.png";
//        https文件下载链接
        String apiHttp = "https://gimg2.baidu.com/image_search/src=http%3A%2F%2Flmg.jj20.com%2Fup%2Fallimg%2F1114%2F040221103339%2F210402103339-8-1200.jpg&refer=http%3A%2F%2Flmg.jj20.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1671956738&t=7369439221c4fff3114c8cbaa28b4330";
//        忽略对服务器端证书的校验
        SSLConnectionSocketFactory scsf = new SSLConnectionSocketFactory(SSLContexts.custom().loadTrustMaterial(null, new TrustSelfSignedStrategy()).build(),
                NoopHostnameVerifier.INSTANCE);
        CloseableHttpClient client = HttpClients.custom().setSSLSocketFactory(scsf).build();
        HttpGet httpget = new HttpGet(apiHttp);
        HttpResponse response = client.execute(httpget);
        HttpEntity entity = response.getEntity();
        InputStream is = entity.getContent();
//        对存储空间大小预定义
        int cache = 10 * 1024;
//        文件输出路径
        FileOutputStream fileout = new FileOutputStream(savePath + "/" + fileName);
        byte[] buffer = new byte[cache];
        int ch = 0;
        while ((ch = is.read(buffer)) != -1) {
            fileout.write(buffer, 0, ch);
        }
        is.close();
        fileout.flush();
        fileout.close();
    }
}
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三、https链接下载文件工具类讲解

// 文件下载存储路径
String savePath = “D:/zhxcmfs/myFiles”;
// 文件命名
String fileName = “图片.png”;
// https文件下载链接
String apiHttp = “https://gimg2.baidu.com/image_search/src=http%3A%2F%2Flmg.jj20.com%2Fup%2Fallimg%2F1114%2F040221103339%2F210402103339-8-1200.jpg&refer=http%3A%2F%2Flmg.jj20.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1671956738&t=7369439221c4fff3114c8cbaa28b4330”;
// 忽略对服务器端证书的校验
SSLConnectionSocketFactory scsf = new SSLConnectionSocketFactory(SSLContexts.custom().loadTrustMaterial(null, new TrustSelfSignedStrategy()).build(),
NoopHostnameVerifier.INSTANCE);
CloseableHttpClient client = HttpClients.custom().setSSLSocketFactory(scsf).build();
HttpGet httpget = new HttpGet(apiHttp);
HttpResponse response = client.execute(httpget);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();
// 对存储空间大小预定义
int cache = 10 * 1024;
// 文件输出路径
FileOutputStream fileout = new FileOutputStream(savePath + “/” + fileName);
byte[] buffer = new byte[cache];
int ch = 0;
while ((ch = is.read(buffer)) != -1) {
fileout.write(buffer, 0, ch);
}
is.close();
fileout.flush();
fileout.close();