[eclipse] dynamic web project 생성하는 방법.

1.dynamic web project 생성.

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2.생성된 프로젝트 구조 확인.

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3.http post body data를 송/수신하는 servlet 코드 생성.(에코 서버)
3.1.http_post_servlet.httpPostServlet.java 생성.

package http_post_servlet;

import java.io.*;
import java.io.PrintWriter;
import java.net.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class Httpserver
 */
public class httpPostServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	/**
	 * Default constructor.
	 */
	public httpPostServlet() {
		// TODO Auto-generated constructor stub
	}

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		System.out.println("doPost() is Running...");

		InputStream in = null;
		BufferedReader reader = null;
		HttpURLConnection httpURLConnection = null;

		String recvMsg = null;
		String sendMsg = null;
		
		try {
			in = request.getInputStream();
			reader = new BufferedReader(new InputStreamReader(in, "utf-8"));

			System.out.println("read is Running...");

			StringBuffer fileData = new StringBuffer(1024);
			char[] buf = new char[1024];
			int numRead = 0;

			while ((numRead = reader.read(buf)) != -1) {
				fileData.append(buf, 0, numRead);
				System.out.println("append is Running...");
			}

			in.close();
			reader.close();

			recvMsg = fileData.toString();
			System.out.println("recvMsg : " + recvMsg);
			sendMsg = recvMsg;

		} catch (Exception e) {
		} finally {
			if (in != null)
				in.close();
			if (reader != null)
				reader.close();
		}

		try {
			
			response.setContentType("text/html);charset=euc-kr");
			PrintWriter out = response.getWriter();
			out.println(sendMsg);
			System.out.println("sendMsg : " + sendMsg);
			
		} catch (IOException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (httpURLConnection != null) {
					httpURLConnection.disconnect();
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

}

3.2.생성된 "http_post_servlet.httpPostServlet.java" 구조 확인.

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4."\eclipse-workspce\servlet\WebContent\WEB-INF\web.xml" 설정.
4.1."\eclipse-workspce\servlet\WebContent\WEB-INF\web.xml" 경로 확인.

4.2."\eclipse-workspce\servlet\WebContent\WEB-INF\web.xml" 설정 확인.

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="servlet-2_5" version="2.5"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

  <display-name>servlet</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <servlet>
    <servlet-name>httpPostServlet</servlet-name>
    <servlet-class>http_post_servlet.httpPostServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>httpPostServlet</servlet-name>
    <url-pattern>/httpPostServlet</url-pattern>
  </servlet-mapping>

</web-app>

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5.프로젝트 *.war 파일로 Export