logback为单独的包或者类配置输出文件

   最近接一个这样的需求，为某个类的日志输出到指定的文件。一般都是按日志级别输出到对应的文件中。查阅相关资料和logback教程，写出下面的demo供参考。

1.添加一个appender 
  

<appender name="demo—all" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${rootpath}gateserver_demo-all.logfile>
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
             <level>DEBUGlevel>
        filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy" >
            <FileNamePattern>${rootpath}demo-all.%i.logFileNamePattern>
            <minIndex>1minIndex>
            <maxIndex>10maxIndex>
        rollingPolicy>   
        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <maxFileSize>800MBmaxFileSize>
        triggeringPolicy>    
         <encoder>
             <pattern>%date [%thread] %-5level %logger{80} - %msg%npattern>
         encoder>
  appender>
2 添加一个logger

additivity必须设置为false，否则不光新的jetty日志文件会存储jetty的日志，原业务日志（root）文件也会存储.不继承root。

这样就OK了。

以下是logback的常用配置：

<?xml version="1.0" encoding="UTF-8"?>  
  
  
  
  
  
  
  
<configuration scan="true" scanPeriod="60 seconds" debug="false">  
      
    <property name="log_dir" value="/logs/ev_cmdb" />  
      
    <property name="maxHistory" value="30"/>  
  
  
  
  
      
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">  
          
        <encoder>  
            <pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger -%msg%npattern>  
        encoder>  
    appender>  
      
      
      
      
    <appender name="ERROR" class="ch.qos.logback.core.rolling.RollingFileAppender">  
          
        <filter class="ch.qos.logback.classic.filter.LevelFilter">  
            <level>ERRORlevel>  
            <onMatch>ACCEPTonMatch>  
            <onMismatch>DENYonMismatch>  
        filter>  
          
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
              
            <fileNamePattern>${log_dir}/%d{yyyy-MM-dd}/error-log.logfileNamePattern>  
              
            <maxHistory>${maxHistory}maxHistory>  
        rollingPolicy>  
          
          
          
          
        <encoder>  
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%npattern>  
        encoder>  
    appender>  
      
      
      
      
    <appender name="WARN" class="ch.qos.logback.core.rolling.RollingFileAppender">  
          
        <filter class="ch.qos.logback.classic.filter.LevelFilter">  
            <level>WARNlevel>  
            <onMatch>ACCEPTonMatch>  
            <onMismatch>DENYonMismatch>  
        filter>  
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
              
            <fileNamePattern>${log_dir}/%d{yyyy-MM-dd}/warn-log.log  
            fileNamePattern>  
              
            <maxHistory>${maxHistory}maxHistory>  
        rollingPolicy>  
        <encoder>  
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%npattern>  
        encoder>  
    appender>  
      
      
      
      
      
    <appender name="INFO" class="ch.qos.logback.core.rolling.RollingFileAppender">  
          
        <filter class="ch.qos.logback.classic.filter.LevelFilter">  
            <level>INFOlevel>  
            <onMatch>ACCEPTonMatch>  
            <onMismatch>DENYonMismatch>  
        filter>  
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
              
            <fileNamePattern>${log_dir}/%d{yyyy-MM-dd}/info-log.log  
            fileNamePattern>  
              
            <maxHistory>${maxHistory}maxHistory>  
        rollingPolicy>  
        <encoder>  
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%npattern>  
        encoder>  
    appender>  
      
      
      
      
      
    <appender name="DEBUG" class="ch.qos.logback.core.rolling.RollingFileAppender">  
          
        <filter class="ch.qos.logback.classic.filter.LevelFilter">  
            <level>DEBUGlevel>  
            <onMatch>ACCEPTonMatch>  
            <onMismatch>DENYonMismatch>  
        filter>  
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
              
            <fileNamePattern>${log_dir}/%d{yyyy-MM-dd}/debug-log.log  
            fileNamePattern>  
              
            <maxHistory>${maxHistory}maxHistory>  
        rollingPolicy>  
        <encoder>  
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%npattern>  
        encoder>  
    appender>  
      
      
      
      
      
    <appender name="TRACE" class="ch.qos.logback.core.rolling.RollingFileAppender">  
          
        <filter class="ch.qos.logback.classic.filter.LevelFilter">  
            <level>TRACElevel>  
            <onMatch>ACCEPTonMatch>  
            <onMismatch>DENYonMismatch>  
        filter>  
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
              
            <fileNamePattern>${log_dir}/%d{yyyy-MM-dd}/trace-log.log  
            fileNamePattern>  
              
            <maxHistory>${maxHistory}maxHistory>  
        rollingPolicy>  
        <encoder>  
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%npattern>  
        encoder>  
    appender>  
  
    <logger name="java.sql.PreparedStatement" value="DEBUG" />    
    <logger name="java.sql.Connection" value="DEBUG" />    
    <logger name="java.sql.Statement" value="DEBUG" />    
    <logger name="com.ibatis" value="DEBUG" />    
    <logger name="com.ibatis.common.jdbc.SimpleDataSource" value="DEBUG" />    
    <logger name="com.ibatis.common.jdbc.ScriptRunner" level="DEBUG"/>    
    <logger name="com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate" value="DEBUG" />    
      
      
      
      
    <root level="debug">  
          
        <appender-ref ref="STDOUT" />  
          
        <appender-ref ref="ERROR" />  
        <appender-ref ref="INFO" />  
        <appender-ref ref="WARN" />  
        <appender-ref ref="DEBUG" />  
        <appender-ref ref="TRACE" />  
    root>  
configuration>  

java代码：

import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;  
  
public class LogUtils {  
    /** 
     * 错误输入日志 
     */  
    public static final Logger log = LoggerFactory.getLogger(LogUtils.class);  
  
    /** 
     * 记录一直 info信息 
     *  
     * @param message 
     */  
    public static void logInfo(String message) {  
        StringBuilder s = new StringBuilder();  
        s.append((message));  
        log.info(s.toString());  
    }  
  
    public static void logInfo(String message, Throwable e) {  
        StringBuilder s = new StringBuilder();  
        s.append(("exception : -->>"));  
        s.append((message));  
        log.info(s.toString(), e);  
    }  
  
    public static void logWarn(String message) {  
        StringBuilder s = new StringBuilder();  
        s.append((message));  
  
        log.warn(s.toString());  
    }  
  
    public static void logWarn(String message, Throwable e) {  
        StringBuilder s = new StringBuilder();  
        s.append(("exception : -->>"));  
        s.append((message));  
        log.warn(s.toString(), e);  
    }  
  
    public static void logDebug(String message) {  
        StringBuilder s = new StringBuilder();  
        s.append((message));  
        log.debug(s.toString());  
    }  
  
    public static void logDebug(String message, Throwable e) {  
        StringBuilder s = new StringBuilder();  
        s.append(("exception : -->>"));  
        s.append((message));  
        log.debug(s.toString(), e);  
    }  
  
    public static void logError(String message) {  
        StringBuilder s = new StringBuilder();  
        s.append(message);  
        log.error(s.toString());  
    }  
  
    /** 
     * 记录日志错误信息 
     *  
     * @param message 
     * @param e 
     */  
    public static void logError(String message, Throwable e) {  
        StringBuilder s = new StringBuilder();  
        s.append(("exception : -->>"));  
        s.append((message));  
        log.error(s.toString(), e);  
    }  
}  

测试：

import java.io.File;  
import java.io.IOException;  
  
import org.junit.Before;  
import org.junit.Test;  
import org.slf4j.Logger;  
import org.slf4j.LoggerFactory;  
  
import ch.qos.logback.core.joran.spi.JoranException;  
  
import com.ghca.easyview.server.common.utils.LogBackConfigLoader;  
import com.ghca.easyview.server.common.utils.LogUtils;  
import com.ghca.easyview.server.config.ServerConfig;  
  
public class TestLog {  
  
    @Before  
    public void before() {  
        File file = new File(System.getProperty("user.dir"));  
        String path = file.getPath() + File.separator + "conf";  
        // 将主要配置文件路径赋值给 ServerConfig.configPath属性  
        ServerConfig.config_path = path;  
        try {  
            // 加载日志文件  
            LogBackConfigLoader.load(ServerConfig  
                    .loadLogBackConfPath("logback.xml"));  
        } catch (IOException | JoranException e) {  
            e.printStackTrace();  
        }  
    }  
  
    @Test  
    public void test1() {  
        LogUtils.logInfo("INFO ~");  
        LogUtils.logDebug("DEBUG ~");  
        LogUtils.logError("ERROR~");  
        LogUtils.logWarn("WARN ~");  
    }  
}