서블릿 파일은 src에 있다.
src 안에 있는 edu.global.ex > HelloWorld.java
package edu.global.ex;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class HelloWorld
*/
@WebServlet("/HelloWorld") // 접속하는 주소를 알려준다.
public class HelloWorld extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public HelloWorld() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().append("Served at: ").append(request.getContextPath());
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
HelloWorld.java의 doGet()을 수정한다.
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().append("Served at: ").append(request.getContextPath());
response.getWriter().append("hello world append");
System.out.println("Hello World~ test");
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//response.getWriter().append("Served at: ").append(request.getContextPath());
response.getWriter().append("<h1>hello world append</h1><br>");
response.getWriter().append("i am a boy you are a girl");
System.out.println("Hello World~ test");
}
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
<display-name>servet_example</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>
</web-app>
WebContent > formex.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Form Example</title>
</head>
<body>
<form action="FormEx" method="get">
<span>이름</span> : <input type="text" name="uname" size="10" /><br>
<span>ID</span> : <input type="text" name="uid" size="10" /><br>
<input type="submit" value="전송" />
<input type="reset" value="리셋" />
</form>
</body>
</html>
(Servlet) FormEx.java
package edu.global.ex;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class HelloWorld
*/
@WebServlet("/FormEx") // form의 action과 같이 맞춰준다.
public class FormEx extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public FormEx() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
// request : 요청하는 객체, response : 응답하는 객체
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("doGet() 실행"); // method = get
/* 접속한 주소 */
System.out.println(request.getRemoteAddr());
System.out.println(request.getRemoteHost());
request.setCharacterEncoding("UTF-8"); // 작업하는 html과 charset을 맞춘다.
/* 내용 받아오기 */
String name = request.getParameter("uname"); // uname에 해당하는 input을 불러온다.
System.out.println(name);
String id = request.getParameter("uid");
System.out.println(id);
/* html로 내용 출력하기 */
response.setContentType("text/html; charset=UTF-8");
PrintWriter writer = response.getWriter();
writer.println("<html><head></head><body>");
writer.println("id = " + id + "<br>");
writer.println("name = " + name + "<br>");
writer.println("</body></html>");
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("doPost() 실행"); // method = post
/* 접속한 주소 */
System.out.println(request.getRemoteAddr());
System.out.println(request.getRemoteHost());
request.setCharacterEncoding("UTF-8"); // 작업하는 html과 charset을 맞춘다.
/* 내용 받아오기 */
String name = request.getParameter("uname"); // uname에 해당하는 input을 불러온다.
System.out.println(name);
String id = request.getParameter("uid");
System.out.println(id);
/* html로 내용 출력하기 */
response.setContentType("text/html; charset=UTF-8");
PrintWriter writer = response.getWriter();
writer.println("<html><head></head><body>");
writer.println("id = " + id + "<br>");
writer.println("name = " + name + "<br>");
writer.println("</body></html>");
}
}