1.日誌框架應該具有的能力

2.

logback 的一些用法   

@Slf4j 可以不用每個類上面都寫 private final Logger logger = LoggerFactory.getLogger(LoggerTest.class);

package com.imooc;

import lombok.extern.slf4j.Slf4j;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
 
import org.springframework.test.context.junit4.SpringRunner;

/**
 * Created by Administrator on 2018/11/5.
 */
@RunWith(SpringRunner.class)
@SpringBootTest
@Slf4j
public class LoggerTest {
//    private final Logger logger = LoggerFactory.getLogger(LoggerTest.class);

    @Test
    public void test1() {

        String name 
 
= "姓名";
        int age = 2;
        log.info("username:{},age:{}", name, age);
        log.info("info");
        log.debug("debug");
        log.error("error");
    }
}

2.1 第一種寫法  只能簡單的配置輸出格式和路徑

#logging:
#  pattern:
##    console: "%d - %msg%n"
##  path: D:\JavaInstall\selllog\
#  file: D:\JavaInstall\selllog\log1.log
#  level:
#    com.imooc.LoggerTest: debug
 

2.2 第二種格式 新建一個配置檔案 （一般用這個寫法）

logback-spring.xml

<?xml version="1.0" encoding="UTF-8" ?>
<configuration>
    <appender name="comsoleLog" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>
                %d -- %msg%n
            </pattern>
        </layout>
    </appender>

    <!--只輸出info日誌-->
    <appender name="fileInfoLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
            <!--<onMatch>DENY</onMatch>-->
            <!--<onMismatch>ACCEPT</onMismatch>-->
        </filter>
        <encoder>
            <pattern>
                %msg%n
            </pattern>
        </encoder>
        <!--滾動策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--路徑-->
            <fileNamePattern>
                D:\JavaInstall\selllog\info.%d.log
            </fileNamePattern>
        </rollingPolicy>
    </appender>

    <!--只輸出error級別的日誌-->
    <appender name="fileErrorLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>
        <encoder>
            <pattern>
                %msg%n
            </pattern>
        </encoder>
        <!--滾動策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--路徑-->
            <fileNamePattern>
                D:\JavaInstall\selllog\error.%d.log
            </fileNamePattern>
        </rollingPolicy>
    </appender>



    <root level="info">
        <appender-ref ref="comsoleLog"></appender-ref>
        <appender-ref ref="fileInfoLog"></appender-ref>
        <appender-ref ref="fileErrorLog"></appender-ref>
    </root>
</configuration>