Java load certificate, Access 12306 HTTPS link

Download the 12306 certificate, visit the 12306 website, download the 12306 certificate

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Export certificate

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Import certificate when export is complete

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See if importing

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Loading Certificates in Java

Public static void main ( String[] args ) {printwriter out = null;     bufferedreader in = null;    string result  =  "";     //set certificate     system.setproperty (" Javax.net.ssl.trustStore "," D:\\program files\\java\\jdk1.7.0_79\\bin\\12306d.keystore ");       system.setproperty ("Javax.net.ssl.trustStorePassword",  "12306java");       try {        url realurl =  new url ("Https://kyfw.12306.cn/otn/login/loginAysnSuggest");         //  connection between open and URL         urlconnection conn =  realurl.openconnection ();        //  set common request Properties          conn.setrequestpRoperty ("Accept",  "*/*");         conn.setrequestproperty (" Connection ", " keep-alive ");         conn.setrequestproperty (" User-agent ",                " mozilla/4.0  (compatible; msie 6.0; windows nt 5.1; SV1);        //  send a POST request must have the following two lines set          conn.setdooutput (True);         conn.setdoinput (True) ;        //  get the output stream corresponding to the URLConnection object          out = new printwriter (Conn.getoutputstream ());         //  Send request parameter         out.print ("Loginuserdto.user_ name=aaa&userdto.password=123456&randcode=182,51, 19,130 ");         // flush output Stream Buffer          out.flush ();        //  Define the BufferedReader input stream to read the URL response         in = new  BufferedReader (                 new inputstreamreader (Conn.getinputstream ()));         string line;        while  ((Line = in.readLine ())  != null)  {            result  += line;        }         SYSTEM.OUT.PRINTLN (Result);    } catch  (exception e)  {         system.out.println ("Send &nbsP post  Request Unexpected exception! "+e");         e.printstacktrace ();    }     //using the finally block to close the output stream, input stream     finally{         try{            if (out!=null) {                 out.close ();             }             if (in!=null) {                 in.close ();             }         }        catch ( IOEXCEPTION EX) {             Ex.printstacktrace ();         }    }} 

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Java load certificate, Access 12306 HTTPS link