Java http请求携带token

在 Java 中发送 HTTP 请求并携带 token 可以通过添加 HTTP 头部信息来实现。具体的做法是：

1. 创建一个 `HttpURLConnection` 对象，并设置请求的 URL。

URL url = new URL("http://example.com/api");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();

2. 添加 HTTP 头部信息，其中 Authorization 头部用于携带 token。

String token = "your_token_here";
connection.setRequestProperty("Authorization", "Bearer " + token);

3. 发送请求并获取响应。

connection.setRequestMethod("GET"); // 设置请求方法，例如 GET、POST 等
int responseCode = connection.getResponseCode(); // 获取响应状态码
String responseBody = ""; // 响应正文
try (BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
    String line;
    while ((line = in.readLine()) != null) {
        responseBody += line;
    }
}

完整的代码示例：

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

public class HttpWithToken {
    public static void main(String[] args) throws Exception {
        URL url = new URL("http://example.com/api");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        String token = "your_token_here";
        connection.setRequestProperty("Authorization", "Bearer " + token);
        connection.setRequestMethod("GET");
        int responseCode = connection.getResponseCode();
        String responseBody = "";
        try (BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
            String line;
            while ((line = in.readLine()) != null) {
                responseBody += line;
            }
        }
        System.out.println("Response code: " + responseCode);
        System.out.println("Response body: " + responseBody);
    }
}