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Contents
FrontControllerjsp파일을 요청했을 때 일어나는 일
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>Home Page</h1>
<hr>
<%
String name = "홍길동";
%>
<%=name%>
</body>
</html>
FrontController
package org.example.demo8;
import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
// localhost:8080/hello.do?path=a
@WebServlet("*.do")
public class FrontController extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("common logic");
String path = req.getParameter("path");
if (path.equals("a")) {
req.getRequestDispatcher("a.jsp").forward(req, resp);
} else if (path.equals("b")) {
req.getRequestDispatcher("b.jsp").forward(req, resp);
} else if (path.equals("c")) {
req.getRequestDispatcher("c.jsp").forward(req, resp);
} else {
}
}
}주소창에 localhost:8080/hello.do?path=a
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>A view</h1>
</body>
</html><%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>B view</h1>
</body>
</html><%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>C view</h1>
</body>
</html>
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