本文主要是介绍HttpUtil的定义,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
1.提供发送http请求的方法,Get、Post、Delete、Put
// 这段代码主要用于发送 HTTP 请求,支持 GET、POST、PUT 和 DELETE 方法,同时支持发送 URL 查询字符串和请求体。下面是加上中文注释后的代码:
package com.wyh.chat.util;import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;public class HttpUtils {/*** get* * @param host* @param path* @param method* @param headers* @param querys* @return* @throws Exception*/public static HttpResponse doGet(String host, String path, String method, Map<String, String> headers, // 请求头Map<String, String> querys) // URL 查询字符串throws Exception { HttpClient httpClient = wrapClient(host);// 获取 HTTP 客户端HttpGet request = new HttpGet(buildUrl(host, path, querys));// 遍历请求头,添加到 HTTP 请求中for (Map.Entry<String, String> e : headers.entrySet()) {request.addHeader(e.getKey(), e.getValue());}return httpClient.execute(request);}/*** post form* * @param host* @param path* @param method* @param headers* @param querys* @param bodys* @return* @throws Exception*/public static HttpResponse doPost(String host, String path, String method, // 请求主机Map<String, String> headers, // 请求头Map<String, String> querys, // URL 查询字符串Map<String, String> bodys) // 请求体throws Exception { HttpClient httpClient = wrapClient(host);// 获取 HTTP 客户端HttpPost request = new HttpPost(buildUrl(host, path, querys));// 遍历请求头,添加到 HTTP 请求中for (Map.Entry<String, String> e : headers.entrySet()) {request.addHeader(e.getKey(), e.getValue());}// 如果请求体不为空,则将其添加到 HTTP 请求中if (bodys != null) {List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();// for (String key : bodys.keySet()) {// nameValuePairList.add(new BasicNameValuePair(key, bodys.get(key)));// }// 将键值对列表转换为 UrlEncodedFormEntity 对象for (String key : bodys.keySet()) {nameValuePairList.add(new BasicNameValuePair(key, bodys.get(key)));}UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nameValuePairList, "utf-8");formEntity.setContentType("application/x-www-form-urlencoded; charset=UTF-8");request.setEntity(formEntity);}return httpClient.execute(request);} /*** Post String* * @param host* @param path* @param method* @param headers* @param querys* @param body* @return* @throws Exception*/public static HttpResponse doPost(String host, String path, String method, // 请求主机Map<String, String> headers, // 请求头Map<String, String> querys, // URL 查询字符串String body) // 请求体throws Exception { HttpClient httpClient = wrapClient(host);// 获取 HTTP 客户端HttpPost request = new HttpPost(buildUrl(host, path, querys));// 遍历请求头,添加到 HTTP 请求中for (Map.Entry<String, String> e : headers.entrySet()) {request.addHeader(e.getKey(), e.getValue());}// 如果请求体不为空,则将其添加到 HTTP 请求中if (StringUtils.isNotBlank(body)) {request.setEntity(new StringEntity(body, "utf-8"));}return httpClient.execute(request);}/*** Post stream* * @param host* @param path* @param method* @param headers* @param querys* @param body* @return* @throws Exception*/public static HttpResponse doPost(String host, String path, String method, // 请求主机Map<String, String> headers, // 请求头Map<String, String> querys, // URL 查询字符串byte[] body) // 请求体throws Exception { HttpClient httpClient = wrapClient(host);// 获取 HTTP 客户端HttpPost request = new HttpPost(buildUrl(host, path, querys));// 遍历请求头,添加到 HTTP 请求中for (Map.Entry<String, String> e : headers.entrySet()) {request.addHeader(e.getKey(), e.getValue());}// 如果请求体不为空,则将其添加到 HTTP 请求中if (body != null) {request.setEntity(new ByteArrayEntity(body));}return httpClient.execute(request);}/*** Put String* @param host* @param path* @param method* @param headers* @param querys* @param body* @return* @throws Exception*/public static HttpResponse doPut(String host, String path, String method, // 请求主机Map<String, String> headers, // 请求头Map<String, String> querys, // URL 查询字符串String body) // 请求体throws Exception { HttpClient httpClient = wrapClient(host);// 获取 HTTP 客户端HttpPut request = new HttpPut(buildUrl(host, path, querys));// 遍历请求头,添加到 HTTP 请求中for (Map.Entry<String, String> e : headers.entrySet()) {request.addHeader(e.getKey(), e.getValue());}// 如果请求体不为空,则将其添加到 HTTP 请求中if (StringUtils.isNotBlank(body)) {request.setEntity(new StringEntity(body, "utf-8"));}return httpClient.execute(request);}/*** Put stream* @param host* @param path* @param method* @param headers* @param querys* @param body* @return* @throws Exception*/public static HttpResponse doPut(String host, String path, String method, // 请求主机Map<String, String> headers, // 请求头Map<String, String> querys, // URL 查询字符串byte[] body) // 请求体throws Exception { HttpClient httpClient = wrapClient(host);// 获取 HTTP 客户端HttpPut request = new HttpPut(buildUrl(host, path, querys));// 遍历请求头,添加到 HTTP 请求中for (Map.Entry<String, String> e : headers.entrySet()) {request.addHeader(e.getKey(), e.getValue());}// 如果请求体不为空,则将其添加到 HTTP 请求中if (body != null) {request.setEntity(new ByteArrayEntity(body));}return httpClient.execute(request);}/*** Delete* * @param host* @param path* @param method* @param headers* @param querys* @return* @throws Exception*/public static HttpResponse doDelete(String host, String path, String method, Map<String, String> headers, Map<String, String> querys)throws Exception { HttpClient httpClient = wrapClient(host);HttpDelete request = new HttpDelete(buildUrl(host, path, querys));for (Map.Entry<String, String> e : headers.entrySet()) {request.addHeader(e.getKey(), e.getValue());}return httpClient.execute(request);}private static String buildUrl(String host, String path, Map<String, String> querys) throws UnsupportedEncodingException {StringBuilder sbUrl = new StringBuilder();sbUrl.append(host);if (!StringUtils.isBlank(path)) {sbUrl.append(path);}if (null != querys) {StringBuilder sbQuery = new StringBuilder();for (Map.Entry<String, String> query : querys.entrySet()) {if (0 < sbQuery.length()) {sbQuery.append("&");}if (StringUtils.isBlank(query.getKey()) && !StringUtils.isBlank(query.getValue())) {sbQuery.append(query.getValue());}if (!StringUtils.isBlank(query.getKey())) {sbQuery.append(query.getKey());if (!StringUtils.isBlank(query.getValue())) {sbQuery.append("=");sbQuery.append(URLEncoder.encode(query.getValue(), "utf-8"));} }}if (0 < sbQuery.length()) {sbUrl.append("?").append(sbQuery);}}return sbUrl.toString();}private static HttpClient wrapClient(String host) {HttpClient httpClient = new DefaultHttpClient();if (host.startsWith("https://")) {sslClient(httpClient);}return httpClient;}private static void sslClient(HttpClient httpClient) {try {SSLContext ctx = SSLContext.getInstance("TLS");X509TrustManager tm = new X509TrustManager() {public X509Certificate[] getAcceptedIssuers() {return null;}public void checkClientTrusted(X509Certificate[] xcs, String str) {}public void checkServerTrusted(X509Certificate[] xcs, String str) {}};ctx.init(null, new TrustManager[] { tm }, null);SSLSocketFactory ssf = new SSLSocketFactory(ctx);ssf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);ClientConnectionManager ccm = httpClient.getConnectionManager();SchemeRegistry registry = ccm.getSchemeRegistry();registry.register(new Scheme("https", 443, ssf));} catch (KeyManagementException ex) {throw new RuntimeException(ex);} catch (NoSuchAlgorithmException ex) {throw new RuntimeException(ex);}}
}
2.需要导入的依赖
<!-- http的请求调用--><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.4.3</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.13</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpcore</artifactId><version>4.4.14</version></dependency><!--string的扩展api--><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>3.12.0</version> <!-- 请使用最新版本 --></dependency>
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