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index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>Servlet</h1>
<form action="loc" method="get">
<input type="text" name = "name">
<input type="submit" value = "get">
</form>
<br><br>
<form action="loc" method="post">
<input type="text" name = "name">
<input type="submit" value = "post">
</form>
</body>
</html>xml servlet 등록
servlet은 두개로 등록한다
hello, sample
아래 코드는 javaEE로 불러온다.(xml)자동 생성
서브릿이름명은 hello로 지정 클래스는 hello.HelloServlet 이기때문에 서버에서
자바 클래스 명령을 받아서 실행된다.
<?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_3_1.xsd" version="3.1">
<display-name>sample03</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>hello</servlet-name>
<servlet-class>hello.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>hello</servlet-name>
<url-pattern>/loc</url-pattern>
<!-- 링크는 사용자 지정이다 -->
</servlet-mapping>
<servlet>
<servlet-name>sample</servlet-name>
<servlet-class>sam.SampleServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>sample</servlet-name>
<url-pattern>/sample</url-pattern>
<!-- 링크는 사용자 지정이다 -->
</servlet-mapping>
<!-- 자바를 등록하는곳 -->
</web-app>
hello.HelloServlet
hello
package hello;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class HelloServlet extends HttpServlet{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//System.out.println("HelloServlet doGet");
//http 주소에 값이 넘겨져서 나온다 파라미터가 보인다
//get 공개를 해도되는 방식
/*
servlet - > java(html)
JSP -> html(java)
*/
//html 에서 데이터를 받아보자
String name = req.getParameter("name");
System.out.println("name :" + name);
//html code 데이터를 html로 날려준다
resp.setContentType("text/html; charset=utf-8");
PrintWriter pw = resp.getWriter();
pw.println("<html>");
pw.println("<head>");
pw.println("<title>제목</title>");
pw.println("</head>");
pw.println("<body>");
pw.println("<h3>HelloServlet</h3>");
pw.println("<p>name:"+ name + "</p>");
pw.println("</body>");
pw.println("</html>");
pw.close();
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//System.out.println("HelloServlet doPost");
//http 주소에 값이 뜨지 않는다(input한값) 파라미터가 안보인다
//post 공개 안하는 방식 더 무겁다
}
}
sam.SampleServlet
package sam;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SampleServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println(" SampleServlet doGet");
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println(" SampleServlet doPost");
}
}
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