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실습1: ID를 정상적으로 입력했을 때는 로그인 메시지를 표시하고, ID를 입력하지 않았을 때는 다시 로그인하라는 메시지를 표시하도록 작성하시오.
// login.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>로그인 </title>
</head>
<body>
<form name="frmLogin" method="post" action="/pro06/loginTest" encType="UTF-8">
아이디 : <input type="text" name="user_id"><br>
비밀번호 : <input type="password" name="user_pw"><br>
<input type="submit" value="로그인"> <input type="reset" value="다시 입력">
</form>
</body>
</html>
// LoginTest.java
package sec04.ex01;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
/**
* Servlet implementation class LoginTest
*/
@WebServlet("/loginTest")
public class LoginTest extends HttpServlet {
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
System.out.println("init 메서드 호출");
}
/**
* @see Servlet#destroy()
*/
public void destroy() {
System.out.println("destroy 메서드 호출");
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("doPost 메서드 호출");
request.setCharacterEncoding("utf-8");
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
String id = request.getParameter("user_id");
String pw = request.getParameter("user_pw");
System.out.println("아이디 : " + id);
System.out.println("비밀번호 : " + pw);
if(id != null && (id.length()!=0)) {
out.print("<html>");
out.print("<body>");
out.print(id + " 님!! 로그인 하셨습니다.");
out.print("<br>");
out.print("</body>");
out.print("</html>");
} else {
out.print("<html>");
out.print("<body>");
out.print("아이디를 입력하세요!!");
out.print("<br>");
out.print("<a href='http://localhost:8090/pro06/test01/login.html'> 로그인 창으로 이동 </a>");
out.print("</body>");
out.print("</html>");
}
}
}
실습2: 실습 예제 1을 이용해 로그인 시 admin ID로 로그인하면 회원 관리와 회원 삭제 기능을 보여주도록 작성하시오.
// login.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>로그인 </title>
</head>
<body>
<form name="frmLogin" method="post" action="/pro06/loginTest2" encType="UTF-8">
아이디 : <input type="text" name="user_id"><br>
비밀번호 : <input type="password" name="user_pw"><br>
<input type="submit" value="로그인"> <input type="reset" value="다시 입력">
</form>
</body>
</html>
// LoginTest2.java
package sec04.ex01;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
/**
* Servlet implementation class LoginTest2
*/
@WebServlet("/loginTest2")
public class LoginTest2 extends HttpServlet {
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
System.out.println("init 메서드 호출");
}
/**
* @see Servlet#destroy()
*/
public void destroy() {
System.out.println("destroy 메서드 호출");
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
String id = request.getParameter("user_id");
String pw = request.getParameter("user_pw");
System.out.println("아이디 : " + id);
System.out.println("비밀번호 : " + pw);
if (id != null && (id.length()!=0)) {
if (id.equals("admin")) {
out.print("<html>");
out.print("<body>");
out.print("<font size='12'>관리자로 로그인 하셨습니다!! </font>");
out.print("<br>");
out.print("<input type='button' value='회원정보 수정하기'>");
out.print("<input type='button' value='회원정보 삭제하기'>");
out.print("</body>");
out.print("</html>");
} else {
out.print("<html>");
out.print("<body>");
out.print(id + " 님!! 로그인 하셨습니다.");
out.print("<br>");
out.print("</body>");
out.print("</html>");
}
} else {
out.print("<html>");
out.print("<body>");
out.print("ID와 비밀번호를 확인하세요!!!");
out.print("<br>");
out.print("<a href='http://localhost:8090/pro06/test01/login.html'> 로그인 창으로 이동 </a>");
out.print("</body>");
out.print("</html>");
}
}
}
실습3: 구구단의 단수를 입력받아 단수를 출력하시오.
// gugu.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>단수 입력창</title>
</head>
<body>
<h1>출력할 구구단의 수를 지정해 주세요.</h1>
<form method="get" action="/pro06/guguTest3">
출력할 구구단 : <input type="text" name="dan" /><br>
<input type="submit" value="구구단 출력">
</form>
</body>
</html>
// guguTest.java
package sec04.ex01;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
/**
* Servlet implementation class guguTest
*/
@WebServlet("/guguTest")
public class guguTest extends HttpServlet {
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
System.out.println("init 메서드 출력");
}
/**
* @see Servlet#destroy()
*/
public void destroy() {
System.out.println("destroy 메서드 출력");
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
int dan = Integer.parseInt(request.getParameter("dan"));
out.print(" <table border=1 width=800 align=center>");
out.print("<tr align=center bgcolor='#FFFF66'>");
out.print("<td colspan=2>" + dan + "단 출력 </td>");
out.print("</tr>");
for (int i=1; i<10; i++) {
out.print("<tr align=center>");
out.print("<td width=400>");
out.print(dan + " * " + i);
out.print("</td>");
out.print("<td width=400>");
out.print(dan * i);
out.print("</td>");
out.print("</tr>");
}
out.print("</table>");
}
}
실습4: 구구단의 단수를 입력받아 단수를 출력하시오.(행 배경색을 교대로 바꾸어 출력)
// guguTest2.java
package sec04.ex01;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
/**
* Servlet implementation class guguTest2
*/
@WebServlet("/guguTest2")
public class guguTest2 extends HttpServlet {
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
System.out.println("init 메서드 출력");
}
/**
* @see Servlet#destroy()
*/
public void destroy() {
System.out.println("destroy 메서드 출력");
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
int dan = Integer.parseInt(request.getParameter("dan"));
out.print(" <table border=1 width=800 align=center>");
out.print("<tr align=center bgcolor='#FFFF66'>");
out.print("<td colspan=2>" + dan + "단 출력 </td>");
out.print("</tr>");
for(int i=1; i<10; i++) {
if (i % 2 == 0) {
out.print("<tr align=center bgcolor='#ACFA58'>");
} else {
out.print("<tr align=center bgcolor='#81BEF7'>");
}
out.print("<td width=400>");
out.print(dan + " * " + i);
out.print("</td>");
out.print("<td width=400>");
out.print(i * dan);
out.print("</td>");
out.print("</tr>");
}
out.print("</table>");
}
}
실습5: 구구단의 단수를 입력받아 단수를 출력하시오.(행 배경색을 교대로 바꾸어 출력, 행의 첫번째칸에 라디오박스, 두번째칸에 체크박스를 추가하여 출력)
// guguTest3.java
package sec04.ex01;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
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 guguTest3
*/
@WebServlet("/guguTest3")
public class guguTest3 extends HttpServlet {
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
System.out.println("init 메서드 호출");
}
/**
* @see Servlet#destroy()
*/
public void destroy() {
System.out.println("destroy 메서드 호출");
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
int dan = Integer.parseInt(request.getParameter("dan"));
out.print(" <table border=1 width=800 align=center>");
out.print("<tr align=center bgcolor='#FFFF66'>");
out.print("<td colspan=4>" + dan + "단 출력 </td>");
out.print("</tr>");
for(int i=1; i<10; i++) {
if (i % 2 == 0) {
out.print("<tr align=center bgcolor='#ACFA58'>");
} else {
out.print("<tr align=center bgcolor='#81BEF7'>");
}
out.print("<td width=200>");
out.print("<input type='radio' />" + i);
out.print("</td>");
out.print("<td width=200>");
out.print("<input type='checkbox' />" + i);
out.print("</td>");
out.print("<td width=400>");
out.print(dan + " * " + i);
out.print("</td>");
out.print("<td width=400>");
out.print(i * dan);
out.print("</td>");
out.print("</tr>");
}
out.print("</table>");
}
}
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