JAVA EE之logback

约定不等于承诺〃 2022-05-13 09:16 197阅读 0赞

### 1:  简单介绍 ###

logback是由log4j创始人设计的又一个开源日志组件。

logback当前分成三个模块：logback-core,logback-classic和logback-access。

logback-core是其它两个模块的基础模块。

logback-classic是log4j的一个改良版本。

此外logback-classic完整实现SLF4J API使你可以很方便地更换成其它日志系统如log4j或JDK14 Logging。

logback-access访问模块与Servlet容器集成提供通过Http来访问日志的功能(用的少)。

**logback-classic包含了logback-core，不需要再单独引用了。**

### **2：在maven中引入** ###

<dependency>
          <groupId>ch.qos.logback</groupId>
          <artifactId>logback-classic</artifactId>
          <version>1.2.1</version>
        </dependency>

### 3：配置 ###

logback的配置文件都放在/src/main/resource/文件夹下的logback.xml文件中。

其中logback.xml文件就是logback的配置文件。只要将这个文件放置好了之后，系统会自动找到这个配置文件。

<?xml version="1.0" encoding="utf-8" standalone="no"?>
    
    
    
    
    
    <configuration debug="false" scan="true" scanPeriod="60 seconds" packagingData="true">
    
        
        <property name="contextName" value="context-name" />
        <property name="log_home" value="/tmp" />
    
    
        
        <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
            
            <encoder>
                
                <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
            </encoder>
        </appender>
    
        
        <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender">
            
            <file>${log_home}/logback.log</file>
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <FileNamePattern>${log_home}/logback.%d{yyyyMMddHHmm}.log</FileNamePattern>
            </rollingPolicy>
            <encoder>
                
                <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
            </encoder>
            
            
        </appender>
    
    
    
    
        <logger name="logback" />
        
        <logger name="logback.LogbackDemo" level="warn" additivity="false">
            <appender-ref ref="console"/>
            <appender-ref ref="file"/>
        </logger>
    
    
    
    
    
        
        <root level="debug">
            
            <level value="debug" />
            <appender-ref ref="file" />
            <appender-ref ref="console" />
        </root>
    
    </configuration>

### 4：测试 ###

//@Controller
    //@RequestMapping("/superadmin")
    //public class AreaController {
        Logger logger=LoggerFactory.getLogger(AreaController.class);
    //    @Autowired
    //    private AreaService areaService;
    //
    //    @RequestMapping(value = "/listareas", method = RequestMethod.GET)
    //    @ResponseBody
    //    private Map<String, Object> listAreas() {
    
            logger.info("start------------------------------------------------------------------");
    //        Map<String, Object> modelMap = new HashMap<String, Object>();
    //        List<Area> list = new ArrayList<Area>();
    //        try {
    //            list = areaService.getAreaList();
    //            modelMap.put("rows",list);
    //            modelMap.put("total", list.size());
    //
    //        } catch (Exception e) {
    //            e.printStackTrace();
    //            modelMap.put("success", false);
    //            modelMap.put("errMsg", e.toString());
    //        }
            logger.info("end------------------------------------------------------------------");
    //        return modelMap;
    //    }
    //}

### 5：输出 ###

**1：控制台输出**

2018-09-12 00:03:27.435 [http-nio-8080-exec-4] INFO  c.o2o.web.superadmin.AreaController - start------------------------------------------------------------------
    Creating a new SqlSession
    SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@14b176ec] was not registered for synchronization because synchronization is not active
    12-Sep-2018 00:03:27.555 信息 [http-nio-8080-exec-4] com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getPoolManager Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 2, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 10000, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName -> 1hge1609x1jvgk49ilfqiy|251b39df, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> com.mysql.jdbc.Driver, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> 1hge1609x1jvgk49ilfqiy|251b39df, idleConnectionTestPeriod -> 0, initialPoolSize -> 3, jdbcUrl -> jdbc:mysql://localhost:3306/o2o?useUnicode=true&characterEncoding=utf8, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 0, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 30, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 10, numHelperThreads -> 3, numThreadsAwaitingCheckoutDefaultUser -> 0, preferredTestQuery -> null, properties -> {user=******, password=******}, propertyCycle -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false ]
    JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@542215f5] will not be managed by Spring
    ==>  Preparing: select area_id,area_name,priority,create_time,last_edit_time from tb_area order by priority desc 
    ==> Parameters: 
    <==    Columns: area_id, area_name, priority, create_time, last_edit_time
    <==        Row: 3, 东苑, 12, 2017-06-04 19:12:58.0, 2017-06-04 19:12:58.0
    <==        Row: 4, 南苑, 10, 2017-06-04 19:13:09.0, 2017-06-04 19:13:09.0
    <==        Row: 5, 西苑, 9, 2017-06-04 19:13:18.0, 2017-06-04 19:13:18.0
    <==        Row: 6, 北苑, 7, 2017-06-04 19:13:29.0, 2017-06-04 19:13:29.0
    <==      Total: 4
    Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@14b176ec]
    2018-09-12 00:03:28.136 [http-nio-8080-exec-4] INFO  c.o2o.web.superadmin.AreaController - end------------------------------------------------------------------

2：文件输出

![70][]

[70]: /images/20220513/dc640e339f1f4645885139977122bb10.png