위로
아래
sendRedirect
response.sendRedirect("second");- HttpServletResponse 객체의 sendRedirect() 메소드 이용
- 주소가 바뀐다
예시
더보기
// FirstServlet
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;
@WebServlet("/first")
public class FirstServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
response.sendRedirect("second");
}
}//SecondServlet
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;
@WebServlet("/second")
public class SecondServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out.print("<html><body>");
out.print("sendRedirect를 이용한 redirect 실습.");
out.print("</body></html>");
}
}
주소에 first를 입력하면
결과로 두 번째 페이지가 나오고, 주소도 바뀐 것을 볼 수 있다.
Refresh
response.addHeader("Refresh","1;url=second");
// 1초 후 이동- 이동하기 전 딜레이 시간을 줄 수 있다.
더보기
//FirstServlet
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;
@WebServlet("/first2")
public class FirstServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
response.addHeader("Refresh","1;url=second2");
}
}//SecondServlet
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;
@WebServlet("/second2")
public class SecondServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out.print("<html><body>");
out.print("sendRedirect를 이용한 redirect 실습.");
out.print("</body></html>");
}
}
location.href
PrintWriter out = response.getWriter();
out.print("<script type='text/javascript'>");
out.print("location.href='second3';");
out.print("</script>");- 자바스크립트의 location 객체 이용
예시
더보기
//FirstServlet
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;
@WebServlet("/first3")
public class FirstServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out.print("<script type='text/javascript'>");
out.print("location.href='second3';");
out.print("</script>");
}
}//SecondServlet
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 SecondServlet
*/
@WebServlet("/second3")
public class SecondServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
out.print("<html><body>");
out.print("location을 이용한 redirect 실습.");
out.print("</body></html>");
}
}
RequestDispatcher
RequestDispatcher dispatch = request.getRequestDispatcher("second5?name=lee");
dispatch.forward(request, response);- 주소(url)가 변경되지 않고 내용만 바뀐다.
- 파마리터 값을 같이 전송할 수 있다
예시
더보기
//FirstServlet
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/first5")
public class FirstServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
RequestDispatcher dispatch = request.getRequestDispatcher("second5?name=lee");
dispatch.forward(request, response);
}
}// SecondServlet
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;
@WebServlet("/second5")
public class SecondServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
String name = request.getParameter("name");
PrintWriter out = response.getWriter();
out.print("<html><body>");
out.print("이름 : " + name + "<br>");
out.print("dispatch를 이용한 forward 실습." + name);
out.print("</body></html>");
}
}