response=$curl -s httpsapphuashijieartapiworkdetailV2visitorId=-1&workId=180830738&cur_user_id=-1&platform=android&os_version=28&version_code=217&device_brand=vivo&device_model=vivo20X21&token=&channe

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.URL; import java.util.regex.Matcher; import java.util.regex.Pattern;

public class Main {

public static void main(String[] args) {
    try {
        String apiUrl = "https://app.huashijie.art/api/work/detailV2?visitorId=-1&workId=180830738&cur_user_id=-1&platform=android&os_version=28&version_code=217&device_brand=vivo&device_model=vivo%20X21&token=&channel=vivo";
        String response = sendGetRequest(apiUrl);
        String json = response.trim();
        String b = getJsonValue(json, "data.multiImages[0].imgPath");
        System.out.println(b);
        Pattern pattern = Pattern.compile("http://bsyimg.pandapaint.net/v2/work_cover/user/[0-9]+/[0-9]+.jpg");
        Matcher matcher = pattern.matcher(b);
        if (matcher.find()) {
            String imageUrl = matcher.group();
            System.out.println("下载图片：" + imageUrl);
            // 使用Java下载图片
            downloadImage(imageUrl);
        } else {
            System.out.println("未能提取到图片地址");
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

private static String sendGetRequest(String apiUrl) throws IOException {
    URL url = new URL(apiUrl);
    BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));
    StringBuilder response = new StringBuilder();
    String line;
    while ((line = reader.readLine()) != null) {
        response.append(line);
    }
    reader.close();
    return response.toString();
}

private static String getJsonValue(String json, String key) {
    String[] keys = key.split("\\.");
    for (String k : keys) {
        if (json.startsWith("{") && json.endsWith("}")) {
            json = json.substring(1, json.length() - 1);
        } else {
            return "";
        }
        String regex = "\"" + k + "\":\\s*\"(.*?)\"";
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(json);
        if (matcher.find()) {
            json = matcher.group(1);
        } else {
            return "";
        }
    }
    return json;
}

private static void downloadImage(String imageUrl) throws IOException {
    URL url = new URL(imageUrl);
    try (BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()))) {
        String fileName = imageUrl.substring(imageUrl.lastIndexOf("/") + 1);
        String savePath = "./" + fileName;
        // 创建输出流，将图片保存到本地
        Files.copy(reader, Paths.get(savePath));
        System.out.println("图片已保存：" + savePath);
    }
}

}