HttpClient库使用示例
HttpClient是apache common下的子项目，用来提供高效的、功能丰富的支持Http协议的客户端编程工具包。
依赖版本：
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10<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.1</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.4.3</version>
</dependency>
代码：
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340package com.demo.utils.lang;
import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpStatus;
import org.apache.http.StatusLine;
import org.apache.http.client.config.RequestConfig;
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.conn.HttpClientConnectionManager;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.ContentType;
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.util.EntityUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.io.IOException;
import java.net.URL;
import java.nio.charset.Charset;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
/**
* HTTP请求工具
*
* @author 小天
* @version 1.0.0, 2017/10/25 0025 15:51
*/
public class HttpUtils {
private static Logger logger = null;
public static final String DEFAULT_USER_AGENT = "Mozilla/5.0";
/**
* 连接超时时间
*/
private static int DEFAULT_CONNECTION_TIMEOUT = 2000;
/**
* socket 超时时间
*/
private static int DEFAULT_SOCKET_TIMEOUT = 5000;
private static Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
public static ContentType DEFAULT_CONTENT_TYPE = ContentType.create("text/plain", DEFAULT_CHARSET);
public static SSLConnectionSocketFactory sslConnectionSocketFactory;
static {
logger = LogManager.getLogger(HttpUtils.class);
try {
SSLContext sslcontext = SSLContext.getInstance("SSLv3");
sslcontext.init(null, new TrustManager[]{new SimpleTrustManager()}, null);
sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslcontext, new String[]{
"SSLv3",
"TLSv1",
"TLSv1.1",
"TLSv1.2"
}, null, new SimpleTrustManager());
} catch (NoSuchAlgorithmException e) {
logger.error("", e);
} catch (KeyManagementException e) {
logger.error("", e);
}
}
/**
* 发送get请求，并返回响应内容
*
* @param url 请求url
*
* @return 响应内容，UTF-8编码
*
* @throws java.io.IOException
*/
public static String get(String url) throws IOException, HttpException {
return get(url, DEFAULT_CHARSET);
}
/**
* 发送 get 请求，并返回响应内容。
*
* @param url 请求url
* @param charset 响应结果编码
*
* @return 响应内容，
*
* @throws java.io.IOException
*/
public static String get(String url, Charset charset) throws IOException, HttpException {
return get(url, charset, DEFAULT_CONNECTION_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
}
/**
* 发送get请求，并返回响应内容
*
* @param url 请求url
* @param charset 响应结果编码
* @param connectionTimeout 链接建立超时时间
* @param socketTimeout 数据传输超时时间
*
* @return 响应内容
*
* @throws java.io.IOException
*/
public static String get(String url, Charset charset, Integer connectionTimeout, Integer socketTimeout) throws
IOException, HttpException {
URL requestUrl = new URL(url);
HttpGet httpGet = new HttpGet(url);
CloseableHttpClient httpsClient = null;
try {
httpsClient = getHttpClient(connectionTimeout, socketTimeout);
CloseableHttpResponse response = httpsClient.execute(httpGet);
try {
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
HttpEntity entity = response.getEntity();
if(charset == null){
return EntityUtils.toString(entity, DEFAULT_CHARSET);
} else {
return EntityUtils.toString(entity, charset);
}
} else {
throw new HttpException("请求失败： status=" + statusLine.toString());
}
} finally {
org.apache.http.client.utils.HttpClientUtils.closeQuietly(response);
}
} finally {
org.apache.http.client.utils.HttpClientUtils.closeQuietly(httpsClient);
}
}
/**
* 发送post请求，并返回响应内容。使用默认ContentType {@link #DEFAULT_CONTENT_TYPE}
*
* @param url 请求url
* @param body 请求内容
*
* @return 响应内容，UTF-8编码
*
* @throws java.io.IOException
*/
public static String post(String url, String body) throws IOException, HttpException {
return post(url, body, DEFAULT_CONTENT_TYPE);
}
/**
* 发送post请求，并返回响应内容。使用默认ContentType {@link #DEFAULT_CONTENT_TYPE}
*
* @param url 请求url
* @param body 请求内容
* @param charset 编码
*
* @return 响应内容
*
* @throws java.io.IOException
*/
public static String post(String url, String body, Charset charset) throws IOException, HttpException {
return post(url, body, ContentType.TEXT_PLAIN.withCharset(charset));
}
/**
* 发送post请求，并返回响应内容。
*
* @param url 请求url
* @param body 请求内容
* @param contentType http请求内容类型。例如： "text/plain; charset=UTF-8"
*
* @return 响应内容，
*
* @throws java.io.IOException
*/
public static String post(String url, String body, String contentType) throws IOException, HttpException {
return post(url, body, ContentType.parse(contentType));
}
/**
* 发送post请求，并返回响应内容。
*
* @param url 请求url
* @param body 请求内容
* @param contentType http请求内容类型。例如： "text/plain; charset=UTF-8"
*
* @return 响应内容，
*
* @throws java.io.IOException
*/
public static String post(String url, String body, ContentType contentType) throws IOException, HttpException {
return post(url, body, contentType, DEFAULT_CONNECTION_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
}
/**
* 发送post请求，并返回响应内容。
*
* @param url 请求url
* @param body 请求内容
* @param contentType http请求内容类型。例如： "text/plain; charset=UTF-8"
* @param connectionTimeout 链接建立超时时间
* @param socketTimeout 数据传输超时时间
*
* @return 响应内容，
*
* @throws java.io.IOException
*/
public static String post(String url, String body, ContentType contentType, Integer connectionTimeout, Integer socketTimeout) throws
IOException, HttpException {
logger.debug("requestUrl={}", url);
URL requestUrl = new URL(url);
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new StringEntity(body, contentType));
CloseableHttpClient httpsClient = getHttpClient(connectionTimeout, socketTimeout);
try {
CloseableHttpResponse response = httpsClient.execute(httpPost);
try {
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
HttpEntity entity = response.getEntity();
return EntityUtils.toString(entity, contentType.getCharset());
} else {
throw new HttpException("请求失败： status=" + statusLine.toString());
}
} finally {
org.apache.http.client.utils.HttpClientUtils.closeQuietly(response);
}
} finally {
org.apache.http.client.utils.HttpClientUtils.closeQuietly(httpsClient);
}
}
/**
* 创建一个新的 CloseableHttpClient，该HttpClient只能用于单个请求，不支持cookie，不支持压缩。<br>
* 如果jvm 不支持 SSLv3 算法，该Client将不能用于https请求
*
* @param connectionTimeout 链接建立超时时间
* @param socketTimeout 数据传输超时时间
*
* @return CloseableHttpClient
*/
public static CloseableHttpClient getHttpClient(Integer connectionTimeout, Integer socketTimeout) {
return getHttpClient(connectionTimeout, socketTimeout, null);
}
/**
* 创建一个新的 CloseableHttpClient，该HttpClient只能用于单个请求，不支持cookie，不支持压缩。<br>
* 如果jvm 不支持 SSLv3 算法，该Client将不能用于https请求
*
* @param connectionTimeout 链接建立超时时间
* @param socketTimeout 数据传输超时时间
* @param connectionManager 连接管理器
*
* @return CloseableHttpClient
*/
public static CloseableHttpClient getHttpClient(Integer connectionTimeout, Integer socketTimeout, HttpClientConnectionManager connectionManager) {
RequestConfig.Builder requestConfigBuiler = RequestConfig.custom()
.setConnectTimeout(DEFAULT_CONNECTION_TIMEOUT)
.setSocketTimeout(DEFAULT_SOCKET_TIMEOUT);
if(connectionTimeout != null){
requestConfigBuiler.setConnectTimeout(connectionTimeout);
}
if(socketTimeout != null){
requestConfigBuiler.setSocketTimeout(socketTimeout);
}
HttpClientBuilder builder = HttpClients.custom()
.setUserAgent(DEFAULT_USER_AGENT)
.disableCookieManagement()
.disableAuthCaching()
.disableAutomaticRetries()
.disableConnectionState()
.disableContentCompression()
.disableRedirectHandling()
.setDefaultRequestConfig(requestConfigBuiler.build());
if(connectionManager != null){
builder.setConnectionManager(connectionManager);
}
builder.setSSLSocketFactory(sslConnectionSocketFactory);
return builder.build();
}
/**
* 简单ssl 处理， 不作任何验证处理
*/
private static class SimpleTrustManager implements X509TrustManager, HostnameVerifier {
private SimpleTrustManager() {
}
public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
}
public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
}
public X509Certificate[] getAcceptedIssuers() {
return null;
}
public boolean verify(String arg0, SSLSession arg1) {
return true;
}
}
public static void main(String[] args) {
try {
String requestBody = "<?xml version=\"1.0\" encoding=\"GBK\"?>" + "<AIPG><INFO><TRX_CODE>211003</TRX_CODE><VERSION>03</VERSION><DATA_TYPE>2</DATA_TYPE><LEVEL>5</LEVEL><USER_NAME>20060400000044502</USER_NAME><USER_PASS>`12qwe</USER_PASS><REQ_SN>1505207167678-K0wkdr</REQ_SN><SIGNED_MSG>89dec912f51f5ef8ab06cc503bddfec076de72b515b5802f38a1f7c0ac76c63f900220fb7db4d7928d4d4218108316e32d6b86e01ab56160e11cb511b62593a291816854437d9a1577e53ae32aa575bb4fd0f52bac03094a215508e8352587e0bb289d30dcd0c73d6fc85091d8f69ff3e75a3b78873b092b204846be1a1437bc</SIGNED_MSG></INFO><VALIDR><MERCHANT_ID>200604000000445</MERCHANT_ID><SUBMIT_TIME>20170912170607</SUBMIT_TIME><BANK_CODE>0105</BANK_CODE><ACCOUNT_NO>6217000340000565982</ACCOUNT_NO><ACCOUNT_NAME>杨晓晖</ACCOUNT_NAME><ACCOUNT_PROP>0</ACCOUNT_PROP><ID_TYPE>0</ID_TYPE><ID>110101198601040010</ID><TEL></TEL><REMARK></REMARK></VALIDR></AIPG>";
String res = post("https://113.108.182.3/aipg/ProcessServlet";, requestBody, Charsets.GBK);
System.out.println(res);
res = get("https://oa.jubaopay.com/admin/oalogin.htm";);
System.out.println(res);
} catch (IOException e) {
e.printStackTrace();
} catch (HttpException e) {
e.printStackTrace();
}
}
}