Spring 프로젝트 구조

<!-- 자바 버전 : 1.6 → 1.8 --> <java-version>1.8</java-version> <!-- 스프링 버전 : 3.1.1 → 5.0.7 --> <org.springframework-version>5.0.7.RELEASE</org.springframework-version>

<!-- Servlet --> <!-- 서블릿 버전 : 2.5 → 3.1 --> <!-- <dependency> --> <!-- <groupId>javax.servlet</groupId> --> <!-- <artifactId>servlet-api</artifactId> --> <!-- <version>2.5</version> --> <!-- <scope>provided</scope> --> <!-- </dependency> --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency>

<!-- 자바 버전 : 1.6 → 1.8 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.5.1</version> <configuration> <source>1.8</source> <target>1.8</target> <compilerArgument>-Xlint:all</compilerArgument> <showWarnings>true</showWarnings> <showDeprecation>true</showDeprecation> </configuration> </plugin>

<web-app version="3.1" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_3_1.xsd"> ...

<!-- 인코딩 필터(한글깨짐 방지) --> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>

<!-- JSP 인코딩 타입 지정 --> <%@ page contentType="text/html; charset=UTF-8" %>

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd"> <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/"> <!-- Appenders --> <appender name="console" class="org.apache.log4j.ConsoleAppender"> <param name="Target" value="System.out" /> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%-5p: %c - %m%n" /> </layout> </appender> <!-- Application Loggers --> <logger name="com.joeun.test"> <level value="info" /> </logger> <!-- 3rdparty Loggers --> <logger name="org.springframework.core"> <level value="info" /> </logger> <logger name="org.springframework.beans"> <level value="info" /> </logger> <logger name="org.springframework.context"> <level value="info" /> </logger> <logger name="org.springframework.web"> <level value="info" /> </logger> <!-- Root Logger --> <root> <priority value="warn" /> <appender-ref ref="console" /> </root> </log4j:configuration>

package com.aloha.sample; import org.apache.log4j.Logger; public class LogExample { // 현재 클래스 전용 Logger 생성 private static final Logger logger = Logger.getLogger(LogExample.class); public static void main(String[] args) { logger.trace("이건 TRACE 로그입니다."); logger.debug("이건 DEBUG 로그입니다."); logger.info("이건 INFO 로그입니다."); logger.warn("이건 WARN 로그입니다."); logger.error("이건 ERROR 로그입니다."); logger.fatal("이건 FATAL 로그입니다."); } }