本篇内容主要讲解“java的http请求工具类HttpClientUtils怎么使用”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“java的http请求工具类HttpClientUtils怎么使用”吧!
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.collections.MapUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
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.HttpEntityEnclosingRequestBase;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.HttpClientConnectionManager;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.ssl.AllowAllHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContexts;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.springframework.util.CollectionUtils;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.SocketTimeoutException;
import java.net.URLEncoder;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
*
*/
public class HttpClientUtils {
private static Log logger = LogFactory.getLog(HttpClientUtils.class);
private static PoolingHttpClientConnectionManager poolingHttpClientConnectionManager = new PoolingHttpClientConnectionManager();
private static CloseableHttpClient httpClient = null;
private static final int DEFAULT_MAX_TOTAL_CONNECTION = 1024;
private static final int DEFAULT_MAX_PER_ROUTE = 300;
private static final String DEFAULT_ENCODING = "UTF-8"; // 默认的查询参数及返回结果的字符串编码
private static final String CONTENT_TYPE_TEXT_XML = "application/xml"; // 默认的查询参数及返回结果的字符串编码
private static final String APPLICATION_XML = "text/xml"; // 默认的查询参数及返回结果的字符串编码
private static final int DEFAULT_CONNECTION_TIME_OUT = 60000; // 默认连接超时时间,
// 60秒
private static final int DEFAULT_READ_TIME_OUT = 200000; // 默认响应超时时间, 60秒
public static JSONObject custRespHeader = new JSONObject();
static {
poolingHttpClientConnectionManager.setMaxTotal(DEFAULT_MAX_TOTAL_CONNECTION);
poolingHttpClientConnectionManager.setDefaultMaxPerRoute(DEFAULT_MAX_PER_ROUTE);
httpClient = HttpClients.custom().setConnectionManager(poolingHttpClientConnectionManager).build();
}
private HttpClientUtils() {
}
/**
* @param url
* @param params
* @param encode
* @param connectTimeout
* @param readTimeout
* @return
*/
public static String invokeGet(String url, Map<String, String> params, String encode, int connectTimeout,
int readTimeout) {
if (connectTimeout <= 0) {
return null;
}
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(readTimeout)
.setConnectTimeout(connectTimeout).setConnectionRequestTimeout(connectTimeout).build();
String responseString;
String requestUrl;
try {
requestUrl = buildRequestUrl(url, params);
} catch (UnsupportedEncodingException e) {
logger.error("encode http get params error, params is " + params, e);
return "";
}
HttpPost httpGet = new HttpPost(requestUrl);
httpGet.setHeader("Connection", "close");
httpGet.setConfig(requestConfig);
responseString = doRequest(httpGet, encode);
return responseString;
}
/**
* @param requestUrl
* @param params
* @return
*/
public static String invokePost(String requestUrl, Map<String, Object> params) {
return invokePost(requestUrl, params, null, null, DEFAULT_ENCODING, DEFAULT_CONNECTION_TIME_OUT,
DEFAULT_READ_TIME_OUT);
}
public static String invokePost(String requestUrl, Map<String, Object> params,Map<String, String> requestHeader) {
return invokePost(requestUrl, params, requestHeader, null, DEFAULT_ENCODING, DEFAULT_CONNECTION_TIME_OUT,
DEFAULT_READ_TIME_OUT);
}
/**
* @param requestUrl
* @param requestHeader
* @param requestBody
* @return
*/
public static String invokePost(String requestUrl, Map<String, String> requestHeader, String requestBody) {
return invokePost(requestUrl, null, requestHeader, requestBody, DEFAULT_ENCODING, DEFAULT_CONNECTION_TIME_OUT,
DEFAULT_READ_TIME_OUT);
}
/**
* @param requestUrl
* @param params
* @param requestHeader
* @param requestBody
* @param encode
* @param connectTimeout
* @param readTimeout
* @return
*/
public static String invokePost(String requestUrl, Map<String, Object> params, Map<String, String> requestHeader,
String requestBody, String encode, int connectTimeout, int readTimeout) {
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(readTimeout)
.setConnectTimeout(connectTimeout).setConnectionRequestTimeout(connectTimeout).build();
String responseString;
HttpPost httpPost = new HttpPost(requestUrl);
httpPost.setConfig(requestConfig);
if (MapUtils.isNotEmpty(requestHeader)) {
for (Map.Entry<String, String> entry : requestHeader.entrySet()) {
httpPost.addHeader(entry.getKey(), entry.getValue());
}
}
buildPostParams(httpPost, params, requestBody, encode);
responseString = doRequest(httpPost, encode);
return responseString;
}
/**
* @param httpPost
* @param params
* @param requestBody
* @param encode
*/
private static void buildPostParams(HttpPost httpPost, Map<String, Object> params, String requestBody,
String encode) {
try {
if (MapUtils.isNotEmpty(params)) {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
for (Map.Entry<String, Object> entry : params.entrySet()) {
String value = null;
if (entry.getValue() instanceof String) {
value = (String) entry.getValue();
} else {
value = JSON.toJSONString(entry.getValue());
}
nameValuePairs.add(new BasicNameValuePair(entry.getKey(), value));
}
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs, encode));
}
if (StringUtils.isNotBlank(requestBody)) {
httpPost.setEntity(new StringEntity(requestBody, encode));
}
} catch (UnsupportedEncodingException e) {
logger.error("HttpClientUtils.buildPostParams error, params = " + params, e);
}
}
/**
* @param httpRequestBase
* @param encode
* @return
*/
private static String doRequest(HttpRequestBase httpRequestBase, String encode) {
String responseString = null;
try {
long start = System.currentTimeMillis();
CloseableHttpResponse response = httpClient.execute(httpRequestBase);
logger.info("HttpClientUtils Begin Invoke: " + httpRequestBase.getURI() + ", cost time "
+ (System.currentTimeMillis() - start) + " ms");
try {
Header[] headers = response.getHeaders("isLogin");
if(headers!=null && headers.length>0){
custRespHeader.put(headers[0].getName(),headers[0].getValue());
}
HttpEntity entity = response.getEntity();
try {
if (entity != null) {
responseString = EntityUtils.toString(entity, encode);
}
} finally {
if (entity != null) {
entity.getContent().close();
}
}
} catch (Exception e) {
e.printStackTrace();
logger.error(String.format("[HttpClientUtils.doRequest] get response error, url:%s",
httpRequestBase.getURI()), e);
responseString = "";
} finally {
if (response != null) {
response.close();
}
}
} catch (SocketTimeoutException e) {
e.printStackTrace();
logger.error(String.format("[HttpClientUtils.doRequest] invoke get timout error, url:%s",
httpRequestBase.getURI()), e);
responseString = "";
} catch (Exception e) {
e.printStackTrace();
logger.error(
String.format("[HttpClientUtils.doRequest] invoke get error, url:%s", httpRequestBase.getURI()), e);
responseString = "";
} finally {
httpRequestBase.releaseConnection();
}
logger.info("HttpClientUtils response : " + responseString);
return responseString;
}
/**
* @param url
* @param params
* @return
* @throws UnsupportedEncodingException
*/
private static String buildRequestUrl(String url, Map<String, String> params) throws UnsupportedEncodingException {
if (CollectionUtils.isEmpty(params)) {
return url;
}
StringBuilder requestUrl = new StringBuilder();
requestUrl.append(url);
int i = 0;
for (Map.Entry<String, String> entry : params.entrySet()) {
if (i == 0) {
requestUrl.append("?");
}
requestUrl.append(entry.getKey());
requestUrl.append("=");
String value = entry.getValue();
requestUrl.append(URLEncoder.encode(value, "UTF-8"));
requestUrl.append("&");
i++;
}
requestUrl.deleteCharAt(requestUrl.length() - 1);
return requestUrl.toString();
}
public static void setStringParams(HttpPost httpost,
Map<String, String> params) {
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
Set<String> keySet = params.keySet();
for (String key : keySet) {
nvps.add(new BasicNameValuePair(key, params.get(key).toString()));
}
try {
httpost.setEntity(new UrlEncodedFormEntity(nvps, "UTF-8"));
} catch (UnsupportedEncodingException e) {
}
}
/**
* @param httpRequest
* @param entity
* @param
* @return
*/
private static String sendRequest(HttpRequestBase httpRequest, HttpEntity entity) {
httpRequest.setHeader("User-Agent", "okHttp");
if (httpRequest instanceof HttpEntityEnclosingRequestBase) {
// checkArgument(null!=entity,"HttpEntity请求体不能为空");
((HttpEntityEnclosingRequestBase) httpRequest).setEntity(entity);
}
//忽略证书
SSLContext sslContext = SSLContexts.createDefault();
X509TrustManager tm = new X509TrustManager() {
public void checkClientTrusted(X509Certificate[] xcs,
String string) throws CertificateException {
}
public void checkServerTrusted(X509Certificate[] xcs,
String string) throws CertificateException {
}
public X509Certificate[] getAcceptedIssuers() {
return null;
}
};
try {
sslContext.init(null, new TrustManager[]{tm}, null);
} catch (Exception ex) {
ex.printStackTrace();
}
X509HostnameVerifier hostnameVerifier = new AllowAllHostnameVerifier();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, hostnameVerifier);
Registry<ConnectionSocketFactory> r = RegistryBuilder.<ConnectionSocketFactory>create()
.register("https", sslsf)
.build();
HttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(r);
CloseableHttpClient httpClient = HttpClients.custom().setConnectionManager(cm).build();
CloseableHttpResponse response = null;
String resString = null;
try {
response = httpClient.execute(httpRequest);
HttpEntity resEntity = response.getEntity();
int statusCode = response.getStatusLine().getStatusCode();
resString = EntityUtils.toString(resEntity, "UTF-8");
System.err.println(statusCode);
if (statusCode != HttpStatus.SC_OK) {
System.out.println("响应码状态不是200");
}
return resString;
} catch (Exception e) {
throw new RuntimeException(resString, e);
} finally {
try {
if (response != null) {
response.close();
}
if (httpRequest != null) {
httpRequest.releaseConnection();
}
if (httpClient != null) {
httpClient.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
}调用示例：
public static void delAll(){
String url = path+"test/test/deleteAll";
Map map = new HashMap<>();
String str = HttpClientUtils.invokePost(url,map);
System.out.println("delAll.str="+str);
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