apache httpClient Post案例

以下是一个基本的Apache HttpClient Post案例：

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

import java.io.IOException;

public class HttpClientPostExample {

    public static void main(String[] args) throws IOException {

        CloseableHttpClient httpClient = HttpClients.createDefault();

        try {
            HttpPost httpPost = new HttpPost("http://localhost:8080/api/post-example");

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

            // 设置请求体
            String json = "{\"name\": \"John\", \"age\": 30}";
            StringEntity entity = new StringEntity(json);
            httpPost.setEntity(entity);

            // 发送请求
            CloseableHttpResponse httpResponse = httpClient.execute(httpPost);

            try {
                // 获取响应体
                HttpEntity httpEntity = httpResponse.getEntity();
                String responseJson = EntityUtils.toString(httpEntity);
                System.out.println(responseJson);
            } finally {
                httpResponse.close();
            }

        } finally {
            httpClient.close();
        }
    }
}

在这个例子中，我们首先创建了一个HttpClient对象。然后，我们创建了一个HttpPost对象，并设置了请求头和请求体。最后，我们发送请求并获取响应体。

请注意，我们在try-with-resources块中使用了CloseableHttpResponse和CloseableHttpClient，以确保它们在使用后被关闭。此外，我们还使用了Apache HttpClient的EntityUtils类来处理响应体。