Java 技术篇 - 从指定的web网页页面中读取html内容实例演示，从http协议下的url地址中读取web页面内容方法

package com.test.test;

import java.io.*;
import java.net.URL;
import java.net.URLConnection;

public class WebHtmlTest {
    public static void main(String[] args) throws IOException {
        /*
         作用：从url中读取web页面的内容
        */

        String html_url = "https://lanzao.blog.csdn.net/article/details/119329989";

        // 连接的超时时间
        System.setProperty("sun.net.client.defaultConnectTimeout", "20000");
        // 读取数据的超时时间
        System.setProperty("sun.net.client.defaultReadTimeout", "20000");

        try {
            URL url = new URL(html_url);
            URLConnection url_connection = url.openConnection();
            InputStream input_stream = url_connection.getInputStream();
            InputStreamReader input_stream_reader = new InputStreamReader(input_stream,"utf-8");
            BufferedReader html_reader = new BufferedReader(input_stream_reader);
            String html_reader_line = null;

            // 读取html内容
            while ((html_reader_line = html_reader.readLine()) != null) {
                if(html_reader_line.contains("class=\"title-article\"")) {
                    System.out.println(html_reader_line);
                }
            }

            // 关闭创建的对象
            html_reader.close();
            input_stream_reader.close();
            input_stream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}