log4j 初体验

### 设置### log4j.rootLogger = debug,stdout,D,E 
### 输出信息到控制抬 ### 
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 
### 输出DEBUG 级别以上的日志到=E://logs/error.log ### 
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender 
log4j.appender.D.File = E://logs/log.log 
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 
### 输出ERROR 级别以上的日志到=E://logs/error.log ### 
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender 
log4j.appender.E.File =E://logs/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

public class Test {
    private static Logger logger = Logger.getLogger(Test.class);  
    public static void main(String[] args) {  
        // System.out.println("This is println message.");  
        // 记录debug级别的信息  
        logger.debug("This is debug message.");  
        // 记录info级别的信息  
        logger.info("This is info message.");  
        // 记录error级别的信息  
        logger.error("This is error message.");  
    }  
}