log4j2的一些配置介紹

log4j2 相比log4j 解決了一些 死鎖問題 改進了效能
下來 我直接掛配置留作本人日後參考

1.maven配置

    <properties>
        <!-- spring版本號 -->
        <spring.version>4.3.2.RELEASE</spring.version>
        <!-- log4j日誌檔案管理包版本 -->
        <slf4j.version>1.7.21</slf4j.version>
 

        <log4j.version>2.7</log4j.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
    <dependencies>
            <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId
 
>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <!-- spring核心包 -->
        <!-- springframe start -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId
 
>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-oxm</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
                <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>${slf4j.version}</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-web</artifactId>
            <version>${log4j.version}</version>
            <scope>runtime</scope>
        </dependency>
    </dependencies>

2.log4j2.xml配置

<?xml version="1.0" encoding="UTF-8"?>
#這一行我設定為OFF 表示不記錄log4j2本身的日誌
<configuration status="OFF"> 
    <properties>
        <property name="LOG_HOME">${web:rootDir}/logs</property>
        <property name="FILE_NAME">likR</property>
    </properties>
    <appenders>
        <Console name="Console" target="SYSTEM_OUT">
        #這ThresholdFilter是個類似攔截器 level 填寫日誌顯示型別
            <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/>
        </Console>
        <File name="Error" fileName="${LOG_HOME}/error.log">
            <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="%d{yyyy.MM.dd 'at' HH:mm:ss z} %-5level %class{36} %L %M - %msg%xEx%n"/>
        </File>
        <RollingFile name="RollingFile" fileName="${LOG_HOME}/${FILE_NAME}.log"
                     filePattern="${LOG_HOME}/$${date:yyyy-MM}/${FILE_NAME}-%d{MM-dd-yyyy}-%i.log.gz">
            <PatternLayout pattern="%d{yyyy-MM-dd 'at' HH:mm:ss z} %-5level %class{36} %L %M - %msg%xEx%n"/>
            #日誌檔案最大值 第二天壓縮
            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="10 MB"/>
            </Policies>
        </RollingFile>
    </appenders>
    #root 預設載入
    <loggers>
        <root level="info">
            <appender-ref ref="RollingFile"/>
            <appender-ref ref="Console"/>
            <appender-ref ref="Error" />
        </root>
    </loggers>
</configuration>

3.web.xml配置
注意!! 是log4jConfiguration！！！

    <context-param>
        <!-- 日誌配置檔案路徑 -->
        <param-name>log4jConfiguration</param-name>
        <param-value>classpath:conf/log4j2.xml</param-value>
    </context-param>

4.程式碼中使用
private Logger logger = LoggerFactory.getLogger(getClass());
logger .error(“{}”,Object);

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