如何在Java中使用Postman向API投递？

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.13</version>
</dependency>

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.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

import java.io.IOException;

public class PostmanExample {
    public static void main(String[] args) {
        HttpClient httpClient = HttpClientBuilder.create().build();
        HttpPost httpPost = new HttpPost("API的URL");

        // 设置请求头
        httpPost.setHeader("Content-Type", "application/json");

        // 设置请求体
        String requestBody = "{\"key1\":\"value1\", \"key2\":\"value2\"}";
        StringEntity entity = new StringEntity(requestBody, "UTF-8");
        httpPost.setEntity(entity);

        try {
            HttpResponse response = httpClient.execute(httpPost);
            HttpEntity responseEntity = response.getEntity();
            String responseBody = EntityUtils.toString(responseEntity);
            System.out.println(responseBody);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}