java url scheme解析url

Java中可以使用Java.net.URL类解析URL。以下是解析URL的步骤：

1. 创建URL对象

URL url = new URL("http://www.example.com/test.html?param1=value1&param2=value2#section1");

2. 获取URL的协议

String protocol = url.getProtocol(); // 返回值为"http"

3. 获取URL的主机名

String host = url.getHost(); // 返回值为"www.example.com"

4. 获取URL的端口号

int port = url.getPort(); // 返回值为-1，因为该URL使用默认端口号

5. 获取URL的路径

String path = url.getPath(); // 返回值为"/test.html"

6. 获取URL的查询参数

String query = url.getQuery(); // 返回值为"param1=value1&param2=value2"

7. 获取URL的锚点

String anchor = url.getRef(); // 返回值为"section1"

完整示例代码如下：

import java.net.URL;

public class URLParser {
    public static void main(String[] args) throws Exception {
        URL url = new URL("http://www.example.com/test.html?param1=value1&param2=value2#section1");
        String protocol = url.getProtocol();
        String host = url.getHost();
        int port = url.getPort();
        String path = url.getPath();
        String query = url.getQuery();
        String anchor = url.getRef();
        System.out.println("Protocol: " + protocol);
        System.out.println("Host: " + host);
        System.out.println("Port: " + port);
        System.out.println("Path: " + path);
        System.out.println("Query: " + query);
        System.out.println("Anchor: " + anchor);
    }
}