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java如何打开网页

2026-03-04 09:09:05Java

使用 `java.net.URL` 和 `java.net.HttpURLConnection`

通过 HttpURLConnection 发送 HTTP 请求获取网页内容。示例代码：

java如何打开网页

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class OpenWebPage {
    public static void main(String[] args) throws Exception {
        String urlString = "https://www.example.com";
        URL url = new URL(urlString);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");

        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String line;
        StringBuilder response = new StringBuilder();
        while ((line = reader.readLine()) != null) {
            response.append(line);
        }
        reader.close();
        System.out.println(response.toString());
    }
}

使用第三方库 `Jsoup`

Jsoup 提供更简单的 HTML 解析功能，适合处理网页内容。需添加依赖（如 Maven）：

java如何打开网页

<dependency>
    <groupId>org.jsoup</groupId>
    <artifactId>jsoup</artifactId>
    <version>1.16.1</version>
</dependency>

代码示例：

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;

public class JsoupExample {
    public static void main(String[] args) throws Exception {
        String url = "https://www.example.com";
        Document doc = Jsoup.connect(url).get();
        System.out.println(doc.title());
        System.out.println(doc.body().text());
    }
}

使用 `java.awt.Desktop` 打开默认浏览器

仅适用于桌面环境，直接调用系统默认浏览器打开网页：

import java.awt.Desktop;
import java.net.URI;

public class OpenBrowser {
    public static void main(String[] args) throws Exception {
        if (Desktop.isDesktopSupported()) {
            Desktop desktop = Desktop.getDesktop();
            desktop.browse(new URI("https://www.example.com"));
        }
    }
}