1.2 日志框架

1.日志框架应该具有的能力

2.

logback 的一些用法   

@Slf4j 可以不用每个类上面都写 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 第一种写法  只能简单的配置输出格式和路径

#logging:
#  pattern:
##    console: "%d - %msg%n"
##  path: D:JavaInstallselllog
#  file: D:JavaInstallsellloglog1.log
#  level:
#    com.imooc.LoggerTest: debug

2.2 第二种格式 新建一个配置文件 （一般用这个写法）

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>

    <!--只输出info日志-->
    <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>
        <!--滚动策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--路径-->
            <fileNamePattern>
                D:JavaInstallsellloginfo.%d.log
            </fileNamePattern>
        </rollingPolicy>
    </appender>

    <!--只输出error级别的日志-->
    <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>
        <!--滚动策略-->
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--路径-->
            <fileNamePattern>
                D:JavaInstallselllogerror.%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>