Automatic submission of HTTP form data using Java

Unified URL Encoding

package demo0808.demo2;/** * because the POST request for HTTP on the network needs to be encoded * To adapt to different operating systems * encoded into uniform ASCII characters * This class URL-encodes the query statement * Key-value pair Intermediate = connection * Different key-value pairs with & connection */import Java.net.urlencoder;public class Qu erystring {private StringBuilder query=new StringBuilder ();p rivate String charset= "UTF-8";/** * No parameter default constructor */public QueryString () {}/** * Sync add key value pair * @param name Parameter name * @param value parameter value */public synchronized void Add (String name,string val UE) {query.append (' & '); encode (name,value);} /** * Synchronize URL encoding * @param name Parameter name * @param value parameter value */private synchronized void encode (String name,string value) {try {Q Uery.append (Urlencoder.encode (name, CharSet)); Query.append (' = '); Query.append (Urlencoder.encode (Value,charset));} catch (Exception ex) {System.err.println ("bad VM can ' t-support" +charset);}} /** * Synchronously gets the query string * @return string */public synchronized Strings Getquery () {return query.tostring ();} /** * Overwrite ToString () method */public String ToString () {return getquery ();}} 
 

HTTP-based POST request key value pairs fill in

Package demo0808.demo2;/** * POST request for HTTP protocol * Form Auto-fill * does not consider Authenticode Identification * Protocol */import java.io.inputstream;import Java regardless of https type. Io. Outputstream;import Java.io.outputstreamwriter;import Java.net.url;import Java.net.urlconnection;public class formposter {Private URL url;private QueryString querystring=new QueryString ();/** * constructor * @param URL Uniform Resource location symbol */public F Ormposter (url url) {if (!url.getprotocol (). toLowerCase (). StartsWith ("http")) {System.err.println ("Post only for HTTP protocol! "); return;} This.url=url;} /** * Add parameter-value pair * @param name Parameter name * @param value parameter value */public void Add (String name,string value) {querystring.add (name, VA Lue);} /** * Get URL * @return URL */public url GetURL () {return URL;} /** * Get the appropriate input stream for the site * @return input stream * @throws Exception cannot connect exception */public InputStream post () throws Exception {URLConnection ope Nconnection = Url.openconnection (); Openconnection.setrequestproperty ("User-agent", "mozilla/4.0" (compatible; MSIE 5.0; Windows NT; Digext); Openconnection.setdooutput (true); OutputStream outputstReam = Openconnection.getoutputstream (); OutputStreamWriter outputstreamwriter = new OutputStreamWriter (OutputStream, "UTF-8"); Outputstreamwriter.write (querystring.tostring ()); Outputstreamwriter.write ("\ r \ n"); o Utputstreamwriter.flush (); Outputstreamwriter.close (); Refreshing the close stream is important only if it is closed to get the input stream return Openconnection.getinputstream ();}}

Test Code

Package demo0808.demo2;/** * Test code */import java.io.file;import Java.io.fileoutputstream;import java.io.InputStream; Import Java.io.inputstreamreader;import Java.io.outputstreamwriter;import Java.net.url;public class Test {public static void Main (string[] args) throws Exception {URL url = new URL ("Https://uniportal.huawei.com/uniportal/login.do"); Formposter formposter = new Formposter (URL);/** * Following is the test of Huawei Recruitment website Landing Interface */formposter.add ("Actionflag", "loginauthenticate"); Formposter.add ("Lang", "zh"); Formposter.add ("redirect", "Http://career.huawei.com/recruitment/login_index.html?") redirect=http://career.huawei.com/recruitment/"), Formposter.add (" UID "," User name "), Formposter.add (" Password "," password ") ; InputStream InputStream = Formposter.post (); InputStreamReader inputstreamreader = new InputStreamReader (InputStream) ; File File=new file ("outfile"); FileOutputStream FileOutputStream = new FileOutputStream (file); OutputStreamWriter OutputStreamWriter = new OutputStreamWriter (FileOutputStream, "UTF-8"); int C;while (C=inputstreamreader.read ())!=-1) {System.out.print ((char) c); Outputstreamwriter.write ((char) c);} Inputstream.close (); Outputstreamwriter.close (); System.out.println ();}}

Automatic submission of HTTP form data using Java