HttpClient4 Post XML到一个服务器上

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现在网上介绍的HttpClient基本上全是3.x版本的内容，HttpClient4的API变化相对3已经变化很大，对HttpClient4做了简单的研究后，完成了一个HttpClient4 Post XML功能。

对于POST方式，最先想到的就是表单提交了，POST XML自然想到的就是定义一个变量名，比如叫xmldata，然后将这个参数的值POST出去，在服务端接收的时候，自然也是通过 requset.getParameter("xmldata")方式来接收。

现在我在这里要做的不是通过上面的方式，而是不指定参数名来Post，实际上就是将一个流写入请求。

下面是具体的实现方式：

1、参数名方式POST XML数据

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.*;

/**
* 通过指定参数名的方式POST XML
*
* @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", "<html>你好啊啊</html>"));
                formparams.add(new BasicNameValuePair("info", "xxxxxxxxx"));
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, "GBK");
//                entity.setContentType("text/xml; charset=GBK");
                httppost.setEntity(entity);
                HttpResponse response = httpclient.execute(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、不指定参数名的方式来POST数据

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.message.BasicNameValuePair;
import org.apache.http.entity.*;

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

/**
* 不指定参数名的方式来POST数据
*
* @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("<html>你好啊啊</html>", "GBK");
                httppost.addHeader("Content-Type", "text/xml");
                httppost.setEntity(myEntity);
                HttpResponse response = httpclient.execute(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();
        }
}

服务端接收方式：

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;

/**
* 接收XLM请求
*
* @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("<html>");
                out.println("<head>");
                out.println("<title>Hello World!</title>");
                out.println("</head>");
                out.println("<body>");
                out.println("<h1>Hello World!！</h1>");
                out.println("</body>");
                out.println("</html>");
        }
}

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、在2的基础，上改为单线程重用连接模式

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;

/**
* 不指定参数名的方式来POST数据,单线程重用连接模式
*
* @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("<html>你好啊啊</html>", "GBK");
                httppost.addHeader("Content-Type", "text/xml");
                httppost.setEntity(myEntity);
                HttpResponse response = httpclient.execute(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();
        }
}

文章转载 http://lavasoft.blog.51cto.com/62575/347157

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