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JSP/Servlet 기본 숙지 Note 본문
- 한글 수식 포함하려면 <META http-equiv="Content-Type"/ content = "text/html;charset=euc-kr"> 코드 필수.
- HTML 내에 코딩하려면 <% [coding] %>
- Servlet 작성은 .java 파일로 생성됨
- Class.java File은 해당 프로젝트 폴더/WEB-INF/classes/ 에 생성
- Web.XML은 해당 프로젝트 폴더/WEB-INF/ 에 생성
- Tomcat에 연동되지 않을 경우 작업창 하단 툴팁-Servers에 직접 올리기
- 대소문자 구분
주로 사용하는 코드들(HTML/JSP)
<META http-equiv="Content-Type"/ content = "text/html;charset=euc-kr"> => HTTP
String str = request.getParameter("[STR]"); => 입력된 값 불러옴
int num = Integer.paresInt(str); => String 타입의 데이터를 int 타입으로 변환
주로 사용하는 코드들(Servlet)
-------------------------------------------------------------------------------------
import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;
public class [ClassName] extends HttpServlet {
/**
* Constructor of the object.
*/
public [ClassName]() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
-------------------------------------------------------------------------------------
한글 지원되게 하는 Servlet code
-------------------------------------------------------------------------------------
request.setCharacterEncoding("euc-kr");
response.setCharacterEncoding("euc-kr");
response.setContentType("text/html;charset = euc-kr");
-------------------------------------------------------------------------------------
주로 사용하는 코드들(web.xml)
-------------------------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
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">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
-------------------------------------------------------------------------------------
<FORM> 엘리먼트
-------------------------------------------------------------------------------------
<FORM>
<INPUT TYPE = TEXT>
<INPUT TYPE = PASSWORD>
<INPUT TYPE = RADIO>
<INPUT TYPE = CHECKBOX>
<SELECT>
<OPTION>A</OPTION>
<OPTION>B</OPTION>
<OPTION>C</OPTION>
</SELECT>
<TETXAREA ROWS = 5 COLS = 50></TEXTAREA>
<INPUT TYPE = RESET VALUE ="취소">
<INPUT TYPE = SUBMIT VALUE = "확인">
</FORM>
<FORM ACTION =[경로명] METHOD = POST> => [경로명] 에 폼에서 일어난 이벤트 전송
POST 를 받을 경우 doPost를 호출해야 함
-------------------------------------------------------------------------------------
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