通过4.4httpclient访问http和调用https

本篇文章用的是httpclient访问http和https，其中httpclient是4.4的版本。
import java.io.File;import java.io.IOException;import java.security.cert.CertificateException;import java.security.cert.X509Certificate;import java.util.ArrayList;import java.util.Hashtable;import java.util.List;import java.util.Map;import java.util.Map.Entry;import java.util.Set;import javax.net.ssl.SSLContext;import javax.net.ssl.TrustManager;import javax.net.ssl.X509TrustManager;import org.apache.http.HttpEntity;import org.apache.http.NameValuePair;import org.apache.http.client.ClientProtocolException;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.conn.ssl.NoopHostnameVerifier;import org.apache.http.conn.ssl.SSLConnectionSocketFactory;import org.apache.http.entity.ContentType;import org.apache.http.entity.mime.HttpMultipartMode;import org.apache.http.entity.mime.MultipartEntityBuilder;import org.apache.http.entity.mime.content.FileBody;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;import com.paperpass.commons.FileIOMethod;import com.paperpass.commons.ProArgs;/** * @Description httpclient处理http请求和https请求 */public class Httpclient {/** * @Description 处理http请求的post方法 * @param url *            :url * @param params *            :参数 * @return 返回的字符串 */public static String post(String url, Hashtable<String, String> params) {CloseableHttpClient httpClient = null;HttpPost httpPost = null;String result = "";try {httpClient = HttpClients.createDefault();RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(4000).setConnectTimeout(4000).build();httpPost = new HttpPost(url);httpPost.setConfig(requestConfig);List<NameValuePair> ps = new ArrayList<NameValuePair>();for (String pKey : params.keySet()) {ps.add(new BasicNameValuePair(pKey, params.get(pKey)));}httpPost.setEntity(new UrlEncodedFormEntity(ps, "utf-8"));CloseableHttpResponse response = httpClient.execute(httpPost);HttpEntity httpEntity = response.getEntity();result = EntityUtils.toString(httpEntity, "utf-8");} catch (ClientProtocolException e) {result = "";} catch (IOException e) {result = "";} finally {try {if (httpPost != null) {httpPost.releaseConnection();}if (httpClient != null) {httpClient.close();}} catch (IOException e) {result = "";}}return result;}/** * @Description 处理http请求的get方法 * @param url *            :url * @param params *            :参数 * @return 返回的字符串 */public static String get(String url, Hashtable<String, String> params) {CloseableHttpClient httpClient = null;HttpGet httpGet = null;String result = "";try {httpClient = HttpClients.createDefault();RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(4000).setConnectTimeout(4000).build();String ps = "";for (String pKey : params.keySet()) {if (!"".equals(ps)) {ps = ps + "&";}// 处理特殊字符，%替换成%25，空格替换为%20，#替换为%23String pValue = params.get(pKey).replace("%", "%25").replace(" ", "%20").replace("#", "%23");ps += pKey + "=" + pValue;}if (!"".equals(ps)) {url = url + "?" + ps;}httpGet = new HttpGet(url);httpGet.setConfig(requestConfig);CloseableHttpResponse response = httpClient.execute(httpGet);HttpEntity httpEntity = response.getEntity();result = EntityUtils.toString(httpEntity, "utf-8");} catch (ClientProtocolException e) {result = "";} catch (IOException e) {result = "";} catch (Exception e) {result = "";} finally {try {if (httpGet != null) {httpGet.releaseConnection();}if (httpClient != null) {httpClient.close();}} catch (IOException e) {result = "";}}return result;}/** * @Description 处理https请求的post方法 * @param url *            :url * @param params *            :参数 * @return 返回的字符串 */public static String postSSL(String url, Hashtable<String, String> params) {CloseableHttpClient httpClient = null;HttpPost httpPost = null;String result = "";try {httpClient = (CloseableHttpClient) wrapClient();RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(4000).setConnectTimeout(4000).build();httpPost = new HttpPost(url);httpPost.setConfig(requestConfig);List<NameValuePair> ps = new ArrayList<NameValuePair>();for (String pKey : params.keySet()) {ps.add(new BasicNameValuePair(pKey, params.get(pKey)));}httpPost.setEntity(new UrlEncodedFormEntity(ps, "utf-8"));CloseableHttpResponse response = httpClient.execute(httpPost);HttpEntity httpEntity = response.getEntity();result = EntityUtils.toString(httpEntity, "utf-8");} catch (ClientProtocolException e) {result = "";} catch (IOException e) {result = "";} finally {try {if (httpPost != null) {httpPost.releaseConnection();}if (httpClient != null) {httpClient.close();}} catch (IOException e) {result = "";}}return result;}/** * @Description 处理https请求的get方法 * @param url *            :url * @param params *            :参数 * @return 返回的字符串 */public static String getSSL(String url, Hashtable<String, String> params) {CloseableHttpClient httpClient = null;HttpGet httpGet = null;String result = "";try {httpClient = (CloseableHttpClient) wrapClient();RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(4000).setConnectTimeout(4000).build();String ps = "";for (String pKey : params.keySet()) {if (!"".equals(ps)) {ps = ps + "&";}// 处理特殊字符，%替换成%25，空格替换为%20，#替换为%23String pValue = params.get(pKey).replace("%", "%25").replace(" ", "%20").replace("#", "%23");ps += pKey + "=" + pValue;}if (!"".equals(ps)) {url = url + "?" + ps;}httpGet = new HttpGet(url);httpGet.setConfig(requestConfig);CloseableHttpResponse response = httpClient.execute(httpGet);HttpEntity httpEntity = response.getEntity();result = EntityUtils.toString(httpEntity, "utf-8");} catch (ClientProtocolException e) {result = "";} catch (IOException e) {result = "";} catch (Exception e) {result = "";} finally {try {if (httpGet != null) {httpGet.releaseConnection();}if (httpClient != null) {httpClient.close();}} catch (IOException e) {result = "";}}return result;}/** * @Description 处理http请求的post方法（含有大数据的参数） * @param url *            :url * @param params *            :参数 * @return 返回的字符串 */public static String postMultipart(String url, Map<String, String> params) {CloseableHttpClient httpClient = null;HttpPost httpPost = null;String result = "";String fileName = "";try {httpClient = HttpClients.createDefault();RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(4000).setConnectTimeout(4000).build();httpPost = new HttpPost(url);httpPost.setConfig(requestConfig);List<NameValuePair> ps = new ArrayList<NameValuePair>();for (String pKey : params.keySet()) {ps.add(new BasicNameValuePair(pKey, params.get(pKey)));}Hashtable<String, File> files = new Hashtable<String, File>();fileName = ProArgs.WorkPath + params.get("FileName") + ".txt";String content = params.get("Report");FileIOMethod.SaveTextFile(fileName, content, "utf-8");File file = new File(fileName);files.put("Report", file);HttpEntity entity = makeMultipartEntity(ps, files);httpPost.setEntity(entity);CloseableHttpResponse response = httpClient.execute(httpPost);HttpEntity httpEntity = response.getEntity();result = EntityUtils.toString(httpEntity, "utf-8");} catch (ClientProtocolException e) {result = "";} catch (IOException e) {result = "";} finally {FileIOMethod.DelFile(fileName);try {if (httpPost != null) {httpPost.releaseConnection();}if (httpClient != null) {httpClient.close();}} catch (IOException e) {result = "";}}return result;}/** * @Description 处理https请求的post方法（含有大数据的参数） * @param url *            :url * @param params *            :参数 * @return 返回的字符串 */public static String postMultipartSSL(String url,Hashtable<String, String> params) {CloseableHttpClient httpClient = null;HttpPost httpPost = null;String result = "";String fileName = "";try {httpClient = (CloseableHttpClient) wrapClient();RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(4000).setConnectTimeout(4000).build();httpPost = new HttpPost(url);httpPost.setConfig(requestConfig);List<NameValuePair> ps = new ArrayList<NameValuePair>();for (String pKey : params.keySet()) {ps.add(new BasicNameValuePair(pKey, params.get(pKey)));}Hashtable<String, File> files = new Hashtable<String, File>();fileName = ProArgs.WorkPath + params.get("FileName") + ".txt";String content = params.get("Report");FileIOMethod.SaveTextFile(fileName, content, "utf-8");File file = new File(fileName);files.put("Report", file);HttpEntity entity = makeMultipartEntity(ps, files);httpPost.setEntity(entity);CloseableHttpResponse response = httpClient.execute(httpPost);HttpEntity httpEntity = response.getEntity();result = EntityUtils.toString(httpEntity, "utf-8");} catch (ClientProtocolException e) {result = "";} catch (IOException e) {result = "";} finally {FileIOMethod.DelFile(fileName);try {if (httpPost != null) {httpPost.releaseConnection();}if (httpClient != null) {httpClient.close();}} catch (IOException e) {result = "";}}return result;}/** * @Description 创建一个不进行正式验证的请求客户端对象 不用导入SSL证书 * @return HttpClient */public static HttpClient wrapClient() {try {SSLContext ctx = SSLContext.getInstance("TLS");X509TrustManager tm = new X509TrustManager() {public X509Certificate[] getAcceptedIssuers() {return null;}public void checkClientTrusted(X509Certificate[] arg0,String arg1) throws CertificateException {}public void checkServerTrusted(X509Certificate[] arg0,String arg1) throws CertificateException {}};ctx.init(null, new TrustManager[] { tm }, null);SSLConnectionSocketFactory ssf = new SSLConnectionSocketFactory(ctx, NoopHostnameVerifier.INSTANCE);CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(ssf).build();return httpclient;} catch (Exception e) {return HttpClients.createDefault();}}/** * @Description 创建一个HTTPEntity对象 * @param params *            :字符串的入参 * @param files *            :大数据的入参 * @return HttpClient */public static HttpEntity makeMultipartEntity(List<NameValuePair> params,Map<String, File> files) {MultipartEntityBuilder builder = MultipartEntityBuilder.create();builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE); // 如果有SocketTimeoutException等情况，可修改这个枚举if (params != null && params.size() > 0) {for (NameValuePair p : params) {builder.addTextBody(p.getName(), p.getValue(),ContentType.TEXT_PLAIN.withCharset("UTF-8"));}}if (files != null && files.size() > 0) {Set<Entry<String, File>> entries = files.entrySet();for (Entry<String, File> entry : entries) {builder.addPart(entry.getKey(), new FileBody(entry.getValue()));}}return builder.build();}/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubString url = "";Hashtable<String, String> params = new Hashtable<String, String>();params.put("username", "123");params.put("password", "123");String a = postSSL(url, params);System.out.println("值为：" + a);}}