Java
SLF4J
LOG4J
package mylog;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Logtest {
// 首先获得日志记录这个对象
static private Logger logger = LoggerFactory.getLogger(Logtest.class);
public static void main(String[] args) {
// 记录error信息
logger.error("[info message]");
// 记录info，还可以传入参数
//logger.info("[info message]{},{},{},{}", "abc", false, 123,new Logtest());
// 记录deubg信息
logger.debug("[debug message]");
// 记录trace信息
logger.trace("[trace message]");
//System.out.println("hello world");
}
}
Log4j.properties
log4j.rootLogger = debug , D , stdout
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 = %d{ABSOLUTE} %5p %c{1}:%L - %m%n
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ../logs/error.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🇲🇲ss} [ %t:%r ] - [ %p ] %m%n
可以打印到控制台就是不能创建并写在日志文件里
我怀疑是你没找到而已。。。
注意这个文件位置并不是在你项目的根目录下。
自己顶啊，为什么引入的logger 和loggerFactory 都是jar包bean-validator的
slf4j所需的三个包
slf4j-api-1.6.1.jar+slf4j-log4j12-1.6.1.jar+log4j-1.2.17.jar
我都放到classpash了。import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class TestSlf4j { private static final Logger logger = LoggerFactory .getLogger(TestSlf4j.class); public static void main(String[] args) { logger.error("This is error message."); logger.info("Hello {}", "SLF4J"); } }### \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=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} %c [ %t:%r ] - [ %p ] %m%n ### \u8F93\u51FAERROR \u7EA7\u522B\u4EE5\u4E0A\u7684\u65E5\u5FD7\u5230=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 =[%-5p] %d{yyyy-MM-dd HH\:mm\:ss,SSS} method\:%l%n%m%n为什么只能打印到控制台 不能输出到日志文件啊。直接用log4j就可以
引用来自“茶_壶”的评论
还没解决？调整一下jar文件的顺序啊，myeclipse的话，参照这个http://yehandjava.iteye.com/blog/2069532我用跟踪找到所引入的类也是正确的