Java send HTTP request, return HTTP response content, instance and application

There are some support for stateless protocol requests (HTTP) in the JDK, and I'll describe a small example (component) I wrote:

Let's first build a request Class (Httprequester).

This class encapsulates the JAVA implementation code for a simple request, as follows:

Import Java.io.BufferedReader;
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.InputStreamReader;
Import java.net.HttpURLConnection;
Import Java.net.URL;
Import Java.nio.charset.Charset;
Import Java.util.Map;
 
Import Java.util.Vector;
 
	/** * HTTP Request Object * * @author Yymmiinngg */public class Httprequester {private String defaultcontentencoding;
	Public Httprequester () {this.defaultcontentencoding = Charset.defaultcharset (). Name (); /** * Send GET request * * @param urlstring * URL Address * @return Response object * @throws IOException/Public
	Httprespons Sendget (String urlstring) throws IOException {return this.send (urlstring, ' get ', NULL, NULL); 
	 /** * Send GET request * * @param urlstring * URL address * @param params * parameter set * @return Response object * @throws IOException */Public httprespons sendget (String urlstring, map<string, string> params) throws IO Exception {return this.send (urlstring, "get", params, NULL); /** * Send GET request * * @param urlstring * URL address * @param params * parameter set * @param prope Rtys * Request Attribute * @return Response object * @throws IOException/public httprespons sendget (String urlstring, MAP&L T String, string> params, map<string, string> propertys) throws IOException {return this.send (urlstring, "get
	", params, propertys);  /** * Send POST request * * @param urlstring * URL Address * @return Response object * @throws IOException/Public
	Httprespons sendpost (String urlstring) throws IOException {return this.send (urlstring, "POST", NULL, NULL); /** * Send POST request * * @param urlstring * URL address * @param params * parameter set * @return response Like * @throws ioexception/public httprespons sendpost (String urlstring, map<string, string> params) throws
	IOException {return this.send (urlstring, "POST", params, null); /** * Send POST request * * @param urlstring *           URL address * @param params * parameter set * @param propertys * Request Attribute * @return Response Object * @thro WS IOException */public httprespons sendpost (String urlstring, map<string, string> params, map<string, Str
	Ing> propertys) throws IOException {return this.send (urlstring, "POST", params, propertys); /** * Send HTTP request * * @param urlstring * @return The object * @throws IOException/private httprespons Send (St Ring URLString, String method, map<string, string> parameters, map<string, string> propertys) throws IOE
 
		xception {httpurlconnection urlconnection = null;
			if (Method.equalsignorecase ("get") && parameters!= null) {stringbuffer param = new StringBuffer ();
			int i = 0;
				For (String Key:parameters.keySet ()) {if (i = = 0) param.append ("?");
				Else Param.append ("&");
				Param.append (Key). Append ("="). Append (Parameters.get (key));
			i++;
		} urlstring + = param; } URL url = new URL (urlstring);
 
		URLConnection = (httpurlconnection) url.openconnection ();
		Urlconnection.setrequestmethod (method);
		Urlconnection.setdooutput (TRUE);
		Urlconnection.setdoinput (TRUE);
 
		Urlconnection.setusecaches (FALSE); if (propertys!= null) for (String Key:propertys.keySet ()) {Urlconnection.addrequestproperty (Key, Propertys.get (
			Key));
			} if (Method.equalsignorecase ("POST") && parameters!= null) {stringbuffer param = new StringBuffer ();
				For (String Key:parameters.keySet ()) {Param.append ("&");
			Param.append (Key). Append ("="). Append (Parameters.get (key));
			} urlconnection.getoutputstream (). Write (Param.tostring (). GetBytes ());
			Urlconnection.getoutputstream (). Flush ();
		Urlconnection.getoutputstream (). Close ();
	Return This.makecontent (urlstring, URLConnection); /** * Received Response object * * @param urlconnection * @return Response Object * @throws IOException/private Httprespons MAKEC
			Ontent (String urlstring,HttpURLConnection urlconnection) throws IOException {httprespons httpresponser = new Httprespons ();
			try {InputStream in = Urlconnection.getinputstream ();
			BufferedReader BufferedReader = new BufferedReader (new InputStreamReader (in));
			Httpresponser.contentcollection = new vector<string> ();
			StringBuffer temp = new StringBuffer ();
			String line = Bufferedreader.readline ();
				While [line!= null] {HttpResponser.contentCollection.add (line);
				Temp.append (line). Append ("\ r \ n");
			line = Bufferedreader.readline ();
 
			} bufferedreader.close ();
			String ecod = urlconnection.getcontentencoding ();
 
			if (ecod = = null) Ecod = this.defaultcontentencoding;
 
			httpresponser.urlstring = urlstring;
			Httpresponser.defaultport = Urlconnection.geturl (). Getdefaultport ();
			Httpresponser.file = Urlconnection.geturl (). GetFile ();
			Httpresponser.host = Urlconnection.geturl (). GetHost ();
			Httpresponser.path = Urlconnection.geturl (). GetPath (); HttpresPonser.port = Urlconnection.geturl (). Getport ();
			Httpresponser.protocol = Urlconnection.geturl (). Getprotocol ();
			Httpresponser.query = Urlconnection.geturl (). Getquery ();
			Httpresponser.ref = Urlconnection.geturl (). GETREF ();
 
			Httpresponser.userinfo = Urlconnection.geturl (). GetUserInfo ();
			Httpresponser.content = new String (temp.tostring (). GetBytes (), ecod);
			httpresponser.contentencoding = Ecod;
			Httpresponser.code = Urlconnection.getresponsecode ();
			Httpresponser.message = Urlconnection.getresponsemessage ();
			Httpresponser.contenttype = Urlconnection.getcontenttype ();
			Httpresponser.method = Urlconnection.getrequestmethod ();
			Httpresponser.connecttimeout = Urlconnection.getconnecttimeout ();
 
			Httpresponser.readtimeout = Urlconnection.getreadtimeout ();
		return httpresponser;
		catch (IOException e) {throw e;
		finally {if (urlconnection!= null) urlconnection.disconnect (); }/** * Default Response Character Set */public String GetdefaultcontentencodiNg () {return this.defaultcontentencoding; /** * Set the default response character set */public void setdefaultcontentencoding (String defaultcontentencoding) {this.defaultcontent
	Encoding = defaultcontentencoding;
 }
}

Next, let's look at the Response object (httprespons). the response object is actually just a data bean that encapsulates the result data for the request response, as follows:

Import Java.util.Vector;
 
	/** * Response Object/public class Httprespons {String urlstring;
 
	int defaultport;
 
	String file;
 
	String host;
 
	String path;
 
	int port;
 
	String Protocol;
 
	String query;
 
	String ref;
 
	String UserInfo;
 
	String contentencoding;
 
	String content;
 
	String ContentType;
 
	int code;
 
	String message;
 
	String method;
 
	int connecttimeout;
 
	int readtimeout;
 
	Vector<string> contentcollection;
	Public String getcontent () {return content;
	Public String getContentType () {return contentType;
	public int GetCode () {return code;
	Public String GetMessage () {return message;
	Public vector<string> getcontentcollection () {return contentcollection;
	Public String getcontentencoding () {return contentencoding;
	Public String GetMethod () {return method;
	public int getconnecttimeout () {return connecttimeout;
	public int getreadtimeout () {return readtimeout; } public STring geturlstring () {return urlstring;
	public int Getdefaultport () {return defaultport;
	Public String GetFile () {return file;
	Public String GetHost () {return host;
	Public String GetPath () {return path;
	public int Getport () {return port;
	Public String Getprotocol () {return protocol;
	Public String Getquery () {return query;
	Public String GetRef () {return ref;
	Public String GetUserInfo () {return userInfo;
 }
 
}

Finally, let's write an application class that tests whether the above code is correct

Import Com.yao.http.HttpRequester;
Import com.yao.http.HttpRespons;
 
public class Test {public
	static void Main (string[] args) {
		try {
			Httprequester request = new Httprequester () ;
			Httprespons hr = Request.sendget ("http://www.csdn.net");
 
			System.out.println (Hr.geturlstring ());
			System.out.println (Hr.getprotocol ());
			System.out.println (Hr.gethost ());
			System.out.println (Hr.getport ());
			System.out.println (Hr.getcontentencoding ());
			System.out.println (Hr.getmethod ());
			
			System.out.println (Hr.getcontent ());
 
		} catch (Exception e) {
			e.printstacktrace ();}}}