【Java工具类合集】HttpUtils-常用HTTP请求工具类
话不多说，直接上代码，记得一键三连哦~
HttpUtils.java
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
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.CloseableHttpResponse;
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.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import javax.net.ssl.*;
import java.io.*;
import java.net.*;
import java.nio.charset.StandardCharsets;
import java.security.cert.X509Certificate;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* HTTP请求工具类
*
* @author xiegege
*/
@Slf4j
public class HttpUtils {
private static HttpClient httpClient;
static {
httpClient = getHttpClient();
}
/**
* 微信统一下单接口发送post请求
*
* @param url 发送请求的URL
* @param requestXml map转换xml的报文
* @return 所代表远程资源的响应结果
*/
public static String doPost(String url, String requestXml) {
CloseableHttpClient httpClient;
CloseableHttpResponse httpResponse;
// 创建httpClient连接对象
httpClient = HttpClients.createDefault();
// 创建post请求连接对象
HttpPost httpPost = new HttpPost(url);
// 创建连接请求对象,并设置连接参数
RequestConfig requestConfig = RequestConfig.custom()
.setConnectTimeout(15000) // 连接服务区主机超时时间
.setConnectionRequestTimeout(60000) // 连接请求超时时间
.setSocketTimeout(60000).build(); // 设置读取响应数据超时时间
// 为httppost请求设置参数
httpPost.setConfig(requestConfig);
// 将上传参数放到entity属性中
httpPost.setEntity(new StringEntity(requestXml, "UTF-8"));
// 添加头信息
httpPost.addHeader("Content-type", "text/xml");
String result = "";
try {
// 发送请求
httpResponse = httpClient.execute(httpPost);
// 从相应对象中获取返回内容
HttpEntity entity = httpResponse.getEntity();
result = EntityUtils.toString(entity, "UTF-8");
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
/**
* 向指定 URL 发送GET方法的请求
*
* @param url 发送请求的 URL
* @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param) {
return sendGet(url, param, "UTF-8");
}
/**
* 向指定 URL 发送GET方法的请求
*
* @param url 发送请求的 URL
* @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @param contentType 编码类型
* @return 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param, String contentType) {
StringBuilder result = new StringBuilder();
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
log.info("sendGet - {}", urlNameString);
URL realUrl = new URL(urlNameString);
URLConnection connection = realUrl.openConnection();
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
connection.connect();
in = new BufferedReader(new InputStreamReader(connection.getInputStream(), contentType));
String line;
while ((line = in.readLine()) != null) {
result.append(line);
}
log.info("recv - {}", result);
} catch (ConnectException e) {
log.error("调用HttpUtils.sendGet ConnectException, url=" + url + ",param=" + param, e);
} catch (SocketTimeoutException e) {
log.error("调用HttpUtils.sendGet SocketTimeoutException, url=" + url + ",param=" + param, e);
} catch (IOException e) {
log.error("调用HttpUtils.sendGet IOException, url=" + url + ",param=" + param, e);
} catch (Exception e) {
log.error("调用HttpsUtil.sendGet Exception, url=" + url + ",param=" + param, e);
} finally {
try {
if (in != null) {
in.close();
}
} catch (Exception ex) {
log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
}
}
return result.toString();
}
/**
* 向指定 URL 发送POST方法的请求
*
* @param url 发送请求的 URL
* @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
StringBuilder result = new StringBuilder();
try {
log.info("sendPost - {}", url);
URL realUrl = new URL(url);
URLConnection conn = realUrl.openConnection();
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
conn.setRequestProperty("Accept-Charset", "utf-8");
conn.setRequestProperty("contentType", "utf-8");
conn.setDoOutput(true);
conn.setDoInput(true);
out = new PrintWriter(conn.getOutputStream());
out.print(param);
out.flush();
in = new BufferedReader(new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8));
String line;
while ((line = in.readLine()) != null) {
result.append(line);
}
log.info("recv - {}", result);
} catch (ConnectException e) {
log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
} catch (SocketTimeoutException e) {
log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
} catch (IOException e) {
log.error("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
} catch (Exception e) {
log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
} finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
}
}
return result.toString();
}
public static String sendSSLPost(String url, String param) {
StringBuilder result = new StringBuilder();
String urlNameString = url + "?" + param;
try {
log.info("sendSSLPost - {}", urlNameString);
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, new TrustManager[]{
new TrustAnyTrustManager()}, new java.security.SecureRandom());
URL console = new URL(urlNameString);
HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
conn.setRequestProperty("Accept-Charset", "utf-8");
conn.setRequestProperty("contentType", "utf-8");
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setSSLSocketFactory(sc.getSocketFactory());
conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
conn.connect();
InputStream is = conn.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String ret;
while ((ret = br.readLine()) != null) {
if (!"".equals(ret.trim())) {
result.append(new String(ret.getBytes(StandardCharsets.ISO_8859_1), StandardCharsets.UTF_8));
}
}
log.info("recv - {}", result);
conn.disconnect();
br.close();
} catch (ConnectException e) {
log.error("调用HttpUtils.sendSSLPost ConnectException, url=" + url + ",param=" + param, e);
} catch (SocketTimeoutException e) {
log.error("调用HttpUtils.sendSSLPost SocketTimeoutException, url=" + url + ",param=" + param, e);
} catch (IOException e) {
log.error("调用HttpUtils.sendSSLPost IOException, url=" + url + ",param=" + param, e);
} catch (Exception e) {
log.error("调用HttpsUtil.sendSSLPost Exception, url=" + url + ",param=" + param, e);
}
return result.toString();
}
/**
* Http Get请求 请求地址
*
* @param url Get参数
* @param params 编码
* @param encode 返回请求结果
*/
public static String sendGetRequest(String url, Map<String, String> params, String encode) {
String result = null;
try {
HttpGet httpGet;
if (null == params) {
httpGet = new HttpGet(url);
} else {
httpGet = new HttpGet(url + dealGetParams(params, encode));
}
HttpResponse response = httpClient.execute(httpGet);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
result = EntityUtils.toString(response.getEntity());
}
} catch (IOException e) {
e.printStackTrace();
}
return result != null ? result : "";
}
public static String sendGetRequest(String url, Map<String, String> params) {
return sendGetRequest(url, params, "UTF-8");
}
public static String sendGetRequest(String url) {
return sendGetRequest(url, null, "UTF-8");
}
public static String sendGetRequestGB2312(String url) {
return sendGetRequest(url, null, "GB2312");
}
/**
* POST请求 返回请求结果 HashMap键值参数
*/
@SuppressWarnings({
"unchecked"})
public static String sendPostRequest(String url, String header, Object params, String encode) throws Exception {
String resultStr = null;
HttpPost httpPost = new HttpPost(url);
if (params != null) {
StringEntity entity;
if (params instanceof Map) {
entity = new StringEntity(dealPostParams((HashMap<String, String>) params, encode));
} else if (params instanceof String) {
entity = new StringEntity((String) params, encode);
} else if (params instanceof List) {
entity = new UrlEncodedFormEntity((List<? extends NameValuePair>) params, encode);
} else {
throw new Exception("参数有误!");
}
httpPost.setHeader("Content-Type", "application/json");
httpPost.setHeader("Client-Sign", header);
httpPost.setEntity(entity);
}
try {
HttpResponse response = httpClient.execute(httpPost);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
resultStr = EntityUtils.toString(response.getEntity());
}
} catch (IOException e) {
e.printStackTrace();
}
return resultStr;
}
public static String sendPostRequest(String url, String header) throws Exception {
return sendPostRequest(url, header, "");
}
/**
* 键值对请求 默认UTF-8编码
*/
public static String sendPostRequest(String url, String header, Map<String, String> params) throws Exception {
return sendPostRequest(url, header, params, "UTF-8");
}
/**
* String 默认UTF-8编码
*/
public static String sendPostRequest(String url, String header, String params) throws Exception {
return sendPostRequest(url, header, params, "UTF-8");
}
/**
* 键值对请求 默认UTF-8编码
*/
public static String sendPostRequest(String url, String header, List<NameValuePair> params) throws Exception {
return sendPostRequest(url, header, params, "UTF-8");
}
/**
* 处理Get方式请求的URL
*/
private static String dealGetParams(Map<String, String> params, String enc) throws UnsupportedEncodingException {
StringBuffer sb = new StringBuffer();
sb.append("?");
for (Map.Entry<String, String> entry : params.entrySet()) {
// 参数名=参数&参数名=参数
sb.append(entry.getKey()).append("=")
.append(URLEncoder.encode(entry.getValue(), enc))
.append("&");
}
// 删除最后一个&
sb.deleteCharAt(sb.length() - 1);
return sb.toString();
}
/**
* 处理POST请求URL
*/
private static String dealPostParams(Map<String, String> params, String enc) {
StringBuffer sb = new StringBuffer();
for (Map.Entry<String, String> entry : params.entrySet()) {
try {
sb.append(entry.getKey()).append("=")
.append(URLEncoder.encode(entry.getValue(), enc))
.append("&");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
sb.deleteCharAt(sb.length() - 1);
return sb.toString();
}
/**
* 获取HttpClient
*/
@SuppressWarnings("deprecation")
public static synchronized HttpClient getHttpClient() {
if (null == httpClient) {
httpClient = new DefaultHttpClient();
}
return httpClient;
}
private static class TrustAnyTrustManager implements X509TrustManager {
@Override
public void checkClientTrusted(X509Certificate[] chain, String authType) {
}
@Override
public void checkServerTrusted(X509Certificate[] chain, String authType) {
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[]{
};
}
}
private static class TrustAnyHostnameVerifier implements HostnameVerifier {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
}
}