1、依赖
<!-- httpclient -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.3.6</version>
</dependency>
2、HttpClient4Util http请求工具类
点击查看代码
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
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.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
/**
* Created on 2020-09-29.
* <p>
* Author: zhukang
* <p>
* Description: http请求工具类
*/
@Slf4j
public final class HttpClient4Util {
/**
* 连接超时时间
*/
public static final int CONNECT_TIMEOUT = 10000;
/**
* 读取超时时间
*/
public static final int SO_TIMEOUT = 30000;
private HttpClient4Util() {
}
/**
* <HttpClient直接连接接口> <功能详细描述>
*
* @param url 接口URL
* @param params NameValuePair参数
* @param encoding 编码
* @return
* @see [类、类#方法、类#成员]
*/
public static String getResponse4PostByMap(String url, Map<String, Object> params, String encoding) {
return post(url, params, encoding);
}
/**
* <HttpClient直接连接接口> <功能详细描述>
*
* @param url 接口URL
* @param params NameValuePair参数
* @param encoding 编码
* @return
* @see [类、类#方法、类#成员]
*/
public static String getResponse4PostByString(String url, String params, String encoding) {
return post(url, params, encoding);
}
/**
* <HttpClient直接连接接口> <功能详细描述>
*
* @param url
* @param encoding
* @return
* @throws Exception
* @see [类、类#方法、类#成员]
*/
public static String getResponse4GetAsString(String url, String encoding) {
return get(url, encoding);
}
/**
* HttpClient直接连接接口，直接返回数据
*
* @param url 接口URL
* @param params NameValuePair参数
* @param encoding 编码
* @return
* @throws Exception
*/
private static String post(String url, Map<String, Object> params, String encoding) {
log.debug("执行Http Post请求,地址: {} ,参数: {}", url, params);
String response = null;
CloseableHttpClient httpClient = null;
try {
httpClient = HttpClientBuilder.create().build();
HttpPost httpPost = new HttpPost(url);
List<NameValuePair> nvps = new ArrayList<>(params.size());
if (!params.isEmpty()) {
Set<Entry<String, Object>> entrySet = params.entrySet();
for (Entry<String, Object> entry : entrySet) {
nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue().toString()));
}
}
// 请求方式为key=value的方式
httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded");
httpPost.addHeader("Accept-Language", "zh-cn");
// 及时释放连接，不缓存连接(防止close_wait)
httpPost.addHeader("Connection", "close");
httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding));
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(SO_TIMEOUT).setConnectTimeout(CONNECT_TIMEOUT).build();
httpPost.setConfig(requestConfig);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
if (httpEntity != null) {
response = EntityUtils.toString(httpEntity, encoding).replaceAll("\r\n", "");
EntityUtils.consume(httpEntity);
}
httpPost.abort();
} catch (Exception e) {
log.error("执行Http Post请求失败! Exception: {}", e.getMessage());
} finally {
if(null != httpClient){
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
log.debug("Http Post执行后响应内容：{}", response);
return response;
}
/**
* HttpClient直接连接接口，直接返回数据，
*
* @param url 接口URL
* @param params xml字符串参数
* @param encoding 编码
* @return
* @throws Exception
*/
private static String post(String url, String params, String encoding) {
log.debug("执行Http Post请求,地址: {}, 参数: {} ", url, params);
String response = null;
CloseableHttpClient httpClient = null;
try {
httpClient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(url);
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(SO_TIMEOUT).setConnectTimeout(CONNECT_TIMEOUT).build();
httpPost.setConfig(requestConfig);
StringEntity postEntity = new StringEntity(params, "UTF-8");
//httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded");
// httpPost.addHeader("Content-Type", "application/json");
httpPost.addHeader("Content-Type", "text/xml");
// 及时释放连接，不缓存连接(防止close_wait)
httpPost.addHeader("Connection", "close");
httpPost.setEntity(postEntity);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
if (httpEntity != null) {
response = EntityUtils.toString(httpEntity, encoding).replaceAll("\r\n", "");
EntityUtils.consume(httpEntity);
}
httpPost.abort();
} catch (Exception e) {
log.error("执行Http Post请求失败! Exception: {}", e.getMessage());
} finally {
if(null != httpClient){
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
log.debug("Http Post执行后响应内容：{} ", response);
return response;
}
/**
* HttpClient直接连接接口，直接返回数据
*
* @param url 接口URL
* @param encoding 编码
* @return
* @throws Exception
*/
private static String get(String url, String encoding) {
log.debug("执行Http get请求,地址: {} ", url );
String response = null;
HttpClient httpClient = null;
try {
httpClient = HttpClientBuilder.create().build();
HttpGet httpGet = new HttpGet(url);
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(SO_TIMEOUT).setConnectTimeout(CONNECT_TIMEOUT).build();
httpGet.setConfig(requestConfig);
httpGet.addHeader("Content-Type", "application/x-www-form-urlencoded");
httpGet.addHeader("Accept-Language", "zh-cn");
// 及时释放连接，不缓存连接(防止close_wait)
httpGet.addHeader("Connection", "close");
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
if (httpEntity != null) {
response = EntityUtils.toString(httpEntity, encoding).replaceAll("\r\n", "");
EntityUtils.consume(httpEntity);
}
httpGet.abort();
} catch (Exception e) {
e.printStackTrace();
log.error("执行Http GET请求失败! Exception: {}", e.getMessage());
}
log.debug("Http GET执行后响应内容：{}", response);
return response;
}
}
