[JSP] 서블릿 예외처리 response.sendError()

response.sendError(HTTP상태코드, 에러메세지)

HttpServletResponse : HTTP 응답정보를 처리하는 객체

<%
response.sendError(HttpServletResponse.SC_FORBIDDEN); // 403 에러 발생 
response.sendError(HttpServletResponse.SC_NOT_FOUND); // 404 에러 발생 
%>

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https://tomcat.apache.org/tomcat-5.5-doc/servletapi/javax/servlet/http/HttpServletResponse.html