java17如何发送http delete

在Java 17中，你可以使用内置的HttpURLConnection或者第三方库如Apache HttpClient或OkHttp来发送HTTP DELETE请求。这里以HttpURLConnection为例，给出一个简单的示例：

import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public void sendDeleteRequest(String url) throws Exception {
    URL obj = new URL(url);
    HttpURLConnection con = (HttpURLConnection) obj.openConnection();

    // 设置请求方法为DELETE
    con.setRequestMethod("DELETE");

    // 添加请求头信息，如果需要的话
    con.setRequestProperty("Content-Type", "application/json; charset=utf-8");
    
    int responseCode = con.getResponseCode();
    System.out.println("DELETE request for URL [" + url + "] returned status code: " + responseCode);

    if (responseCode == HttpURLConnection.HTTP_OK) {
        // 如果请求成功，处理响应数据
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        // 打印返回的数据
        System.out.println(response.toString());
    } else {
        // 处理错误状态码
        System.out.println("Failed : HTTP error code : " + responseCode);
    }

    // 关闭连接
    con.disconnect();
}

要使用此代码，你需要包含`java.net`包，并处理异常。如果你打算频繁发送HTTP请求或者更高级的操作，考虑使用像OkHttp这样的强大库，它提供更好的错误处理和性能。