java发送带Basic Auth认证的http post请求实例代码

以下是Java发送带Basic Auth认证的HTTP POST请求的示例代码：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.Base64;

public class HttpPostWithBasicAuth {

    public static void main(String[] args) throws IOException {
        String url = "http://example.com/api/resource";
        String username = "myusername";
        String password = "mypassword";
        String postData = "param1=value1&param2=value2";

        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();

        // set request method
        con.setRequestMethod("POST");

        // set basic authentication header
        String auth = username + ":" + password;
        byte[] encodedAuth = Base64.getEncoder().encode(auth.getBytes(StandardCharsets.UTF_8));
        String authHeaderValue = "Basic " + new String(encodedAuth);
        con.setRequestProperty("Authorization", authHeaderValue);

        // set post data
        con.setDoOutput(true);
        con.getOutputStream().write(postData.getBytes("UTF-8"));

        // get response
        int responseCode = con.getResponseCode();
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuilder response = new StringBuilder();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        // print response
        System.out.println("Response code: " + responseCode);
        System.out.println("Response body: " + response.toString());
    }
}

在上面的代码中，我们使用 `HttpURLConnection` 类来建立HTTP连接，并设置了请求头中的基本认证信息。我们还设置了POST数据，并获取了响应，最后打印了响应码和响应体。请注意，此示例仅用于演示目的，实际使用中需要根据实际情况进行修改。