CloseableHttpClient怎么引入到java
时间: 2023-10-14 08:14:32 浏览: 36
要使用CloseableHttpClient,您需要引入Apache HttpComponents库。可以通过以下步骤来引入:
1. 打开您的项目,并在项目的构建路径中添加HttpComponents库的JAR文件。您可以从 HttpComponents官网下载JAR文件,或者使用 Maven 或 Gradle 等构建工具来管理依赖。
2. 在您的 Java 类中导入CloseableHttpClient类:
```java
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
```
3. 创建CloseableHttpClient实例:
```java
CloseableHttpClient httpclient = HttpClients.createDefault();
```
现在您可以使用httpclient对象来发送HTTP请求和接收响应。记得在使用完毕后关闭httpclient对象:
```java
httpclient.close();
```
相关问题
java原生http请求
Java原生HTTP请求可以使用OkHttp或CloseableHttpClient来实现。使用OkHttp需要引入okhttp-3.10.0.jar的依赖,使用CloseableHttpClient则需要引入httpclient-4.5.6.jar的依赖。以下是一个使用OkHttp进行HTTP请求的示例代码:
```java
import com.alibaba.fastjson.JSON;
import okhttp3.*;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
public class HttpTest {
public static void main(String[] args) throws IOException {
String url = "http://10.30.10.151:8012/gateway.do";
OkHttpClient client = new OkHttpClient();
Map<String, String> paraMap = new HashMap<>();
paraMap.put("yybh", "1231231");
RequestBody requestBody = new MultipartBody.Builder()
.addFormDataPart("consumerAppId", "tst")
.addFormDataPart("serviceName", "queryCipher")
.addFormDataPart("params", JSON.toJSONString(paraMap))
.build();
Request request = new Request.Builder()
.url(url)
.post(requestBody)
.addHeader("Content-Type", "application/x-www-form-urlencoded")
.build();
Response response = client
.newCall(request)
.execute();
if (response.isSuccessful()) {
System.out.println("result: " + response.body().string());
} else {
throw new IOException("Unexpected code " + response);
}
}
}
```
java httpclient发送请求
Java HttpClient是一个发送HTTP请求的开源库,可以用来发送GET、POST等请求。下面是使用HttpClient发送POST请求的示例代码:
```java
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;
public class HttpClientExample {
public static void main(String[] args) {
CloseableHttpClient httpClient = HttpClients.createDefault();
try {
HttpPost httpPost = new HttpPost("http://example.com/api/endpoint");
httpPost.addHeader("Content-Type", "application/json");
String jsonData = "{\"key1\":\"value1\", \"key2\":\"value2\"}";
StringEntity entity = new StringEntity(jsonData);
httpPost.setEntity(entity);
CloseableHttpResponse response = httpClient.execute(httpPost);
try {
HttpEntity responseEntity = response.getEntity();
String responseBody = EntityUtils.toString(responseEntity);
System.out.println(responseBody);
} finally {
response.close();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
httpClient.close();
} catch (Exception e) {
e.printStackTrace(); }
}
}
}
```
以上代码使用了Apache HttpClient库,它需要引入相关的jar包。首先创建一个CloseableHttpClient对象,然后创建一个HttpPost对象,并设置请求URL和请求头部信息。接着创建一个StringEntity对象,将请求参数转化为JSON格式,并将其设置为HttpPost的实体。最后执行HttpPost请求,获取响应实体,将其转化为字符串并打印出来。最后关闭HttpClient。