HttpClient4 Post XML to a server

HttpClient4 Post XML to a serverNow the HttpClient introduced on the internet is basically 3. the content of Version x, HttpClient4 API changes a lot compared with version 3. After a simple research on HttpClient4, A HttpClient4 Post XML function is completed. For the post method, the first thing that comes to mind is form submission. post xml naturally comes to mind when defining a variable name, such as xmldata, and then POST the value of this parameter, when the server receives the request, it also uses requset. getParameter ("xmldata") method. What I want to do here is not to use the above method, but not to specify the parameter name for Post. In fact, it is to write a stream into the request. The following are the specific implementation methods: 1. Parameter Name method post xml data import org. apache. http .*;
Import org. apache. http. client. entity. UrlEncodedFormEntity;
Import org. apache. http. client. methods. HttpPost;
Import org. apache. http. impl. client. DefaultHttpClient;
Import org. apache. http. message. BasicNameValuePair;
Import org. apache. http. client .*;

Import java. io. IOException;
Import java. io. InputStreamReader;
Import java. io. UnsupportedEncodingException;
Import java. util .*;

/**
* Post xml by specifying the parameter name
*
* @ Author leizhimin 2010-7-8 22:29:28
*/
Public class TestPost {
Public static void main (String [] args) throws IOException {
HttpClient httpclient = new DefaultHttpClient ();
HttpPost httppost = new HttpPost ("http: // localhost: 8080/waitsrv/GenXmlServlet ");

List <NameValuePair> formparams = new ArrayList <NameValuePair> ();
Formparams. add (new BasicNameValuePair ("xmldate", "Formparams. add (new BasicNameValuePair ("info", "xxxxxxxxx "));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity (formparams, "GBK ");
// Entity. setContentType ("text/xml; charset = GBK ");
Httppost. setEntity (entity );
HttpResponse response = httpclient.exe cute (httppost );
HttpEntity resEntity = response. getEntity ();
InputStreamReader reader = new InputStreamReader (resEntity. getContent (), "ISO-8859-1 ");
Char [] buff = new char [1024];
Int length = 0;
While (length = reader. read (buff ))! =-1 ){
System. out. println (new String (buff, 0, length ));
Httpclient. getConnectionManager (). shutdown ();
}
}
} 2. POST Data import org. apache. http. HttpEntity without specifying the parameter name;
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. impl. client. DefaultHttpClient;
Import org. apache. http. message. BasicNameValuePair;
Import org. apache. http. entity .*;


Import java. io. IOException;
Import java. io. InputStreamReader;
Import java. util. ArrayList;
Import java. util. List;

/**
* POST data without specifying the parameter name
*
* @ Author leizhimin 2010-7-8 3:22:53
*/
Public class TestPostXml {
Public static void main (String [] args) throws IOException {
HttpClient httpclient = new DefaultHttpClient ();
HttpPost httppost = new HttpPost ("http: // localhost: 8080/waitsrv/GenXmlServlet ");
StringEntity myEntity = new StringEntity ("Httppost. addHeader ("Content-Type", "text/xml ");
Httppost. setEntity (myEntity );
HttpResponse response = httpclient.exe cute (httppost );
HttpEntity resEntity = response. getEntity ();
InputStreamReader reader = new InputStreamReader (resEntity. getContent (), "ISO-8859-1 ");
Char [] buff = new char [1024];
Int length = 0;
While (length = reader. read (buff ))! =-1 ){
System. out. println (new String (buff, 0, length ));
}
Httpclient. getConnectionManager (). shutdown ();
}
} Server Receiving Method: package com;

Import javax. servlet. ServletException;
Import javax. servlet. http. HttpServlet;
Import javax. servlet. http. HttpServletRequest;
Import javax. servlet. http. HttpServletResponse;
Import java. io. IOException;
Import java. io. InputStreamReader;
Import java. io. PrintWriter;

/**
* Receive XLM requests
*
* @ Author leizhimin 2010-7-8 1:02:42
*/
Public class GenXmlServlet extends HttpServlet {
Protected void doPost (HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// String xml = req. getParameter ("xmldata ");
Resp. setContentType ("text/xml ");
Resp. setCharacterEncoding ("GBK ");
PrintWriter out = resp. getWriter ();
// Out. println (xml );
// System. out. println (xml );
System. out. println ("----------------------");
InputStreamReader reader = new InputStreamReader (req. getInputStream (), "GBK ");
Char [] buff = new char [1024];
Int length = 0;
While (length = reader. read (buff ))! =-1 ){
String x = new String (buff, 0, length );
System. out. println (x );
Out. print (x );
}
}

Protected void doGet (HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
Resp. setContentType ("text/html ");
PrintWriter out = resp. getWriter ();
Out. println ("Out. println ("Out. println ("<title> Hello World! </Title> ");
Out. println ("Out. println ("<body> ");
Out. println ("Out. println ("</body> ");
Out. println ("}
} Web. xml <? Xml version = "1.0" encoding = "UTF-8"?>
<Web-app xmlns = "http://java.sun.com/xml/ns/javaee"
Xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance"
Xsi: schemaLocation = "http://java.sun.com/xml/ns/javaee
Http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
Version = "2.5">

<Servlet>
<Servlet-name> GenXmlServlet </servlet-name>
<Servlet-class> com. GenXmlServlet </servlet-class>
</Servlet>
<Servlet-mapping>
<Servlet-name> GenXmlServlet </servlet-name>
<Url-pattern>/GenXmlServlet </url-pattern>
</Servlet-mapping>
</Web-app> 3. On the basis of 2, the connection mode is changed to single-threaded reuse 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. impl. client. DefaultHttpClient;
Import org. apache. http. impl. conn. SingleClientConnManager;
Import org. apache. http. message. BasicNameValuePair;
Import org. apache. http. entity .*;


Import java. io. IOException;
Import java. io. InputStreamReader;
Import java. util. ArrayList;
Import java. util. List;

/**
* POST data without specifying the parameter name, and reuse the connection mode in a single thread.
*
* @ Author leizhimin 2010-7-8 3:22:53
*/
Public class TestPostXml2 {
Public static void main (String [] args) throws IOException {
SingleClientConnManager sccm = new SingleClientConnManager ();
HttpClient httpclient = new DefaultHttpClient (sccm );
// HttpGet httpget = new HttpGet (urisToGet [I]);
// HttpClient httpclient = new DefaultHttpClient ();
HttpPost httppost = new HttpPost ("http: // localhost: 8080/waitsrv/GenXmlServlet ");
StringEntity myEntity = new StringEntity ("Httppost. addHeader ("Content-Type", "text/xml ");
Httppost. setEntity (myEntity );
HttpResponse response = httpclient.exe cute (httppost );
HttpEntity resEntity = response. getEntity ();
InputStreamReader reader = new InputStreamReader (resEntity. getContent (), "ISO-8859-1 ");
Char [] buff = new char [1024];
Int length = 0;
While (length = reader. read (buff ))! =-1 ){
System. out. println (new String (buff, 0, length ));
}
Httpclient. getConnectionManager (). shutdown ();
}
} Http://hc.apache.org/downloads.cgi

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