Apache HttpClient库来发送HTTP请求和接收响应

​

要使用Apache HttpClient库来发送HTTP请求和接收响应，你需要按照以下步骤进行操作：

导入HttpClient库: 首先，在你的Java项目中添加Apache HttpClient库的依赖。如果你使用Maven作为项目构建工具，可以在pom.xml文件中添加以下依赖项：

org.apache.httpcomponents

httpclient

4.5.10

xml复制代码

org.apache.httpcomponents httpclient 4.5.13

创建HttpClient实例: 创建HttpClient对象以执行HTTP请求。

java复制代码

import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClientBuilder; CloseableHttpClient httpClient = HttpClientBuilder.create().build();

创建HTTP请求: 创建一个HttpUriRequest对象，以指定请求类型和URL。

java复制代码

import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.methods.HttpUriRequest; // GET请求示例 HttpUriRequest request = new HttpGet("http://example.com/api"); // POST请求示例 HttpUriRequest request = new HttpPost("http://example.com/api");

设置请求参数: 如果需要，你可以设置请求头、请求体或其他请求参数。

java复制代码

// 设置请求头信息 request.addHeader("Content-Type", "application/json"); // 设置请求体 String requestBody = "{ \"key\": \"value\" }"; ((HttpPost) request).setEntity(new StringEntity(requestBody));

发送请求并获取响应: 使用HttpClient对象发送请求，并获得服务器的响应。

java复制代码

import org.apache.http.client.ResponseHandler; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.impl.client.BasicResponseHandler; CloseableHttpResponse response = httpClient.execute(request); // 使用BasicResponseHandler将响应内容转换为字符串 ResponseHandler responseHandler = new BasicResponseHandler(); String responseBody = responseHandler.handleResponse(response);

处理响应: 对获得的响应进行处理，包括获取状态码、响应头和

这是一个示例

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

CloseableHttpClient httpClient = HttpClientBuilder.create().build();

// GET请求示例

HttpUriRequest requestGET = new HttpGet("http://localhost:8082/base/personbychineseName?unitchineseName=第三舰队");

System.out.println("requestGET = " + requestGET);

// POST请求示例

// HttpUriRequest requestPOST = new HttpPost("http://localhost:8082/base/listb");

HttpUriRequest requestPOST = new HttpPost("http://localhost:8082/unit/queryunitbybase");

// 设置请求头信息

requestPOST.addHeader("Content-Type", "application/json");

// 设置请求体

//String requestBody = "{ \"chineseName\": \"横须贺港\" }";

String requestBody = "{\"chineseName\":\"横须贺港\"}";

//String requestBody = "{\"chName\":\"高雄海軍基地\",\"type\":\"海基\",\"country\":\"台湾\",\"catagory\":\"蓝方\"}";

((HttpPost) requestPOST).setEntity(new StringEntity(requestBody,"UTF-8"));

System.out.println("requestPOST = " + requestPOST);

CloseableHttpResponse response = httpClient.execute(requestPOST);

//CloseableHttpResponse response = httpClient.execute(requestGET);

// 使用BasicResponseHandler将响应内容转换为字符串

ResponseHandler responseHandler = new BasicResponseHandler();

String responseBody = responseHandler.handleResponse(response);

System.out.println("responseBody = " + responseBody);

}

​