MyRequestWrapper.java
package filter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
public class MyRequestWrapper extends HttpServletRequestWrapper {
HttpServletRequest request;
public MyRequestWrapper(HttpServletRequest request) {
super(request);
// TODO Auto-generated constructor stub
this.request = request;
}
@Override
public String getParameter(String name) {
// TODO Auto-generated method stub
System.out.println("getParameter호출");
String str = request.getParameter("name");
if(str ==null) return null;
return str.toUpperCase();
}
}
MyFilter.java
package filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
/**
* Servlet Filter implementation class MyFilter
*/
@WebFilter("*.jsp")
public class MyFilter implements Filter {
/**
* Default constructor.
*/
public MyFilter() {
// TODO Auto-generated constructor stub
}
/**
* @see Filter#destroy()
*/
public void destroy() {
// TODO Auto-generated method stub
}
/**
* @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
*/
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
// TODO Auto-generated method stub
// place your code here
System.out.println("doFilter 호출");
MyRequestWrapper requestWrapper = new MyRequestWrapper((HttpServletRequest)request);
// pass the request along the filter chain
chain.doFilter(requestWrapper, response);
}
/**
* @see Filter#init(FilterConfig)
*/
public void init(FilterConfig fConfig) throws ServletException {
// TODO Auto-generated method stub
}
}
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String name = request.getParameter("name");
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
입력된 이름 : <%=name %>
</body>
</html>
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