httpclient获取token

获取token的具体实现方式取决于你要访问的API的认证方式。一般来说，你需要先向API服务器发送认证请求，然后从响应中获取token。以下是一个使用Apache HttpClient获取token的示例代码：

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class TokenClient {
    public static void main(String[] args) throws Exception {
        HttpClient httpClient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost("https://api.example.com/token");
        httpPost.setHeader("Content-Type", "application/json");

        String requestBody = "{\"username\":\"your_username\",\"password\":\"your_password\"}";
        StringEntity requestEntity = new StringEntity(requestBody);
        httpPost.setEntity(requestEntity);

        HttpResponse response = httpClient.execute(httpPost);
        HttpEntity responseEntity = response.getEntity();
        String responseString = EntityUtils.toString(responseEntity, "UTF-8");

        // 解析响应，获取token
        // ...

        System.out.println(responseString);
    }
}