12. 로그 기록하기

* C 드라이브에 log 폴더 생성

 

1. Filter 인터페이스의 구현 클래스 작성하기

LogFilter.java

package filter;

import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;

public class LogFilter implements Filter{
	
	public void init(FilterConfig config) throws ServletException{
		System.out.println("WebMarket 초기화...");
	}
	
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws java.io.IOException, ServletException {
		System.out.println("접속한 클라리언트 IP: " + request.getRemoteAddr());
		long start = System.currentTimeMillis();
		System.out.println("접근한 URL 경로: " + getURLPath(request));
		System.out.println("요청 처리 시작 시각: " + getCurrentTime());
		chain.doFilter(request, response);
	
		long end = System.currentTimeMillis();
		System.out.println("요청 처리 종료 시각: " + getCurrentTime());
		System.out.println("요청 처리 소요 시간: " + (end-start) + "ms ");
		System.out.println("=======================================================================");
	}
	
	public void destroy() {
		
	}
	
	private String getCurrentTime() {
		DateFormat formatter = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
		Calendar calendar = Calendar.getInstance();
		calendar.setTimeInMillis(System.currentTimeMillis());
		
		return formatter.format(calendar.getTime());
	}

	private String getURLPath(ServletRequest request) {
		HttpServletRequest req;
		String currentPath = "";
		String queryString = "";
		if(request instanceof HttpServletRequest) {
			req =  (HttpServletRequest)request;
			currentPath = req.getRequestURI();
			queryString = req.getQueryString();
			queryString = queryString == null ? "" : "?" + queryString;
		}
		
		
		return currentPath+queryString;
	}
}

 

2. web.xml 파일에 필터 구성하기

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app>
	<security-role>
		<description></description>
		<role-name>admin</role-name>
	</security-role>
	<security-constraint>
		<display-name>WebMarket Security</display-name>
		<web-resource-collection>
			<web-resource-name>WebMarket</web-resource-name>
			<description></description>
			<url-pattern>/addProduct.jsp</url-pattern>
		</web-resource-collection>
		<auth-constraint>
			<description>권한 권리자명</description>
			<role-name>admin</role-name>
		</auth-constraint>
	</security-constraint>
	<login-config>
		<auth-method>FORM</auth-method>
		<form-login-config>
			<form-login-page>/login.jsp</form-login-page>
			<form-error-page>/login_failed.jsp</form-error-page>
		</form-login-config>
	</login-config>
	<error-page>
		<error-code>404</error-code>
		<location>/exceptionNoPage.jsp</location>
	</error-page>
	<filter>
		<filter-name>LogFilter</filter-name>
		<filter-class>filter.LogFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>LogFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

 

3. Filter 인터페이스의 구현 클래스 작성하기

LogFileFilter.java

package filter;

import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.DateFormat;
import java.text.SimpleDateFormat;

public class LogFileFilter implements Filter{
	
	PrintWriter writer;
	
	public void init(FilterConfig config) throws ServletException{
		String filename = config.getInitParameter("filename");
		
		if(filename == null) {
			throw new ServletException("로그 파일의 이름을 찾을 수 없습니다");
		}
		try {
			writer = new PrintWriter(new FileWriter(filename, true), true);
		}catch(IOException e) {
			throw new ServletException("로그 파일을 열 수 없습니다");
		}
		
	}
	
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws java.io.IOException, ServletException {
		
		writer.println("접속한 클라이언트 IP: " + request.getRemoteAddr());
		long start = System.currentTimeMillis();
		writer.println("접근한 URL 경로: " + getURLPath(request));
		writer.println("요청 처리 시작 시각: " + getCurrentTime());
		
		chain.doFilter(request, response);
	
		long end = System.currentTimeMillis();
		writer.println("요청 처리 종료 시각: " + getCurrentTime());
		writer.println("요청 처리 소요 시간: " + (end-start) + "ms ");
		writer.println("=======================================================================");
	}
	
	public void destroy() {
		writer.close();
	}
	
	private String getCurrentTime() {
		DateFormat formatter = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
		Calendar calendar = Calendar.getInstance();
		calendar.setTimeInMillis(System.currentTimeMillis());
		
		return formatter.format(calendar.getTime());
	}

	private String getURLPath(ServletRequest request) {
		HttpServletRequest req;
		String currentPath = "";
		String queryString = "";
		if(request instanceof HttpServletRequest) {
			req =  (HttpServletRequest)request;
			currentPath = req.getRequestURI();
			queryString = req.getQueryString();
			queryString = queryString == null ? "" : "?" + queryString;
		}
		
		
		return currentPath + queryString;
	}
}

 

4. web.xml 파일에 필터 등록하기

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app>
	<security-role>
		<description></description>
		<role-name>admin</role-name>
	</security-role>
	<security-constraint>
		<display-name>WebMarket Security</display-name>
		<web-resource-collection>
			<web-resource-name>WebMarket</web-resource-name>
			<description></description>
			<url-pattern>/addProduct.jsp</url-pattern>
		</web-resource-collection>
		<auth-constraint>
			<description>권한 권리자명</description>
			<role-name>admin</role-name>
		</auth-constraint>
	</security-constraint>
	<login-config>
		<auth-method>FORM</auth-method>
		<form-login-config>
			<form-login-page>/login.jsp</form-login-page>
			<form-error-page>/login_failed.jsp</form-error-page>
		</form-login-config>
	</login-config>
	<error-page>
		<error-code>404</error-code>
		<location>/exceptionNoPage.jsp</location>
	</error-page>
	<filter>
		<filter-name>LogFilter</filter-name>
		<filter-class>filter.LogFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>LogFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	<filter>
		<filter-name>LogFileFilter</filter-name>
		<filter-class>filter.LogFileFilter</filter-class>
		<init-param>
			<param-name>filename</param-name>
			<param-value>c:\\logs\\webmarket.log</param-value>		
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>LogFileFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	
	
</web-app>

WebMarket(12).zip

0.76MB