Recently, I need to make a wrapper on the client's interface and then use other system calls from my company. The client interface is implemented using an HTTP URL. I want to use the HttpClient package to make requests. At the same time, since the requested URL is HTTPS, in order to avoid the need for a certificate, I use a class to inherit the DefaultHttpClient class and ignore the verification process.
1. Write an SSLClient class and inherit it to HttpClient
package com.pcmall.service.sale.miaomore.impl; import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import javax.net.ssl.SSLContext; import javax.net.ssl.TrustManager; import javax.net.ssl.X509TrustManager; 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.impl.client.DefaultHttpClient; //HttpClient used to make Https requests public class SSLClient extends DefaultHttpClient{ public SSLClient() throws Exception{ super(); SSLContext ctx = SSLContext.getInstance("TLS"); X509TrustManager tm = new X509TrustManager() { @Override public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException { } @Override public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException { } @Override public X509Certificate[] getAcceptedIssuers() { return null; } }; ctx.init(null, new TrustManager[]{tm}, null); SSLSocketFactory ssf = new SSLSocketFactory(ctx,SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER); ClientConnectionManager ccm = this.getConnectionManager(); SchemeRegistry sr = ccm.getSchemeRegistry(); sr.register(new Scheme("https", 443, ssf)); } }2. Write a class that uses HttpClient to send post requests
package com.pcmall.service.sale.miaomore.impl; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Map.Entry; import org.apache.http.HttpEntity; 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.HttpPost; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; /* * Tool class for post requests using HttpClient*/ public class HttpClientUtil { public String doPost(String url,Map<String,String> map,String charset){ HttpClient httpClient = null; HttpPost httpPost = null; String result = null; try{ httpClient = new SSLClient(); httpPost = new HttpPost(url); //Set the parameter List<NameValuePair> list = new ArrayList<NameValuePair>(); Iterator iterator = map.entrySet().iterator(); while(iterator.hasNext()){ Entry<String,String> elem = (Entry<String, String>) iterator.next(); list.add(new BasicNameValuePair(elem.getKey(),elem.getValue())); } if(list.size() > 0){ UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list,charset); httpPost.setEntity(entity); } HttpResponse response = httpClient.execute(httpPost); if(resEntity != null){ HttpEntity resEntity = response.getEntity(); if(resEntity != null){ result = EntityUtils.toString(resEntity,charset); } } } } catch(Exception ex){ ex.printStackTrace(); } return result; } }3. Call the test code for post request
package com.pcmall.service.sale.miaomore.impl; import java.util.HashMap; import java.util.Map; //Test the interface public class TestMain { private String url = "https://xxx.xxx.xxx/"; private String charset = "utf-8"; private HttpClientUtil httpClientUtil = null; public TestMain(){ httpClientUtil = new HttpClientUtil(); } public void test(){ String httpOrgCreateTest = url + "xxx/xxx/delivery"; Map<String,String> createMap = new HashMap<String,String>(); createMap.put("delivery_code","1D1QZ222Z22SM21A"); createMap.put("timestamp","1479198840000"); createMap.put("sign","F2109C333F3EADE929F932E89703FA0F683D43EB"); String httpOrgCreateTestRtn = httpClientUtil.doPost(httpOrgCreateTest,createMap,charset); System.out.println("result:"+httpOrgCreateTestRtn); } public static void main(String[] args){ TestMain main = new TestMain(); main.test(); } }At first I didn’t understand the usage of BasicNameValuePair. Later, I slowly explored it and found that BasicNameValuePair is a class that stores key-value pairs. When adding new key and value values, it will automatically replace it with http format, = and & symbols, such as https://xxx.xxx.xxx/xxx/xxxx/delivery?delivery_code=DQZZSM2A×tamp=1479198840000&sign=F209C33FEADE99F93E8970FA0F68D3EB. We don’t have to splice and match it ourselves. I personally think it is quite convenient and accurate to use. I hope it can help everyone!
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