此java工程中沒有用到spring,只是普通java+maven工程，需要用到日誌檔案，一定要在pom.xml檔案中引入需要的jar包<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
<!-- log4j日誌檔案管理包版本 -->
<slf4j.version>1.6.6</slf4j.version>
<log4j.version>1.2.12</log4j.version>
</properties>
<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependencies>

### \u8BBE\u7F6E###
log4j.rootLogger = debug,stdout,D,E

### \u8F93\u51FA\u4FE1\u606F\u5230\u63A7\u5236\u62AC ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender
 
.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n

### \u8F93\u51FADEBUG \u7EA7\u522B\u4EE5\u4E0A\u7684\u65E5\u5FD7\u5230=D://logs/debug.log ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = /debug.log
log4j.appender.R.DatePattern = '.'
 
yyyy-MM-dd 
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG 
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

### \u8F93\u51FAERROR \u7EA7\u522B\u4EE5\u4E0A\u7684\u65E5\u5FD7\u5230=D://logs/error.log ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File =/error.log 
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR 
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n 

然後再程式中
`public class LogTest {

private static Logger logger = Logger.getLogger(LogTest.class);    

public static void main(String[] args) {      
    // 記錄debug級別的資訊    
    logger.debug("This is debug message.");    
    // 記錄info級別的資訊    
    logger.info("This is info message.");    
    // 記錄error級別的資訊    
    logger.error("This is error message."); 
    System.out.println("===========");
}    

}`
我嘗試了兩個輸出log的地方，一個是debug的輸出檔案為相對路勁，一個為error,輸出為絕對路徑，在D盤logs資料夾下面