求java高手帮我解决这个问题!!!

创建这个文件就好了嘛 conf\log4j.properties
它是 Log4j 的配置文件

# Set log levels #
log4j.rootLogger = DEBUG, Console, LogFile

# Output the log info to the Java Console #
log4j.appender.Console = org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target = System.out
log4j.appender.Console.ImmediateFlush = true
log4j.appender.Console.Threshold = DEBUG
log4j.appender.Console.layout = org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern = <%-d{yyyy-MM-dd HH:mm:ss}> <%t> %l %n<%p> %m%n%n

# Save the log info to the log file #
log4j.appender.LogFile = org.apache.log4j.RollingFileAppender
log4j.appender.LogFile.File = logs/log.log
log4j.appender.LogFile.Append = true
log4j.appender.LogFile.ImmediateFlush = false
log4j.appender.LogFile.MaxFileSize = 8MB
log4j.appender.LogFile.MaxBackupIndex = 256
log4j.appender.LogFile.Threshold = INFO
log4j.appender.LogFile.layout = org.apache.log4j.PatternLayout
log4j.appender.LogFile.layout.ConversionPattern = <%-d{yyyy-MM-dd HH:mm:ss}> <%t> %l %n<%p> %m%n%n

你的配置文件的路径有问题
你的是 web项目还是 se项目？

代码粘上来好不好呢 这错误信息什么也看不出来

少了jar包吧

路径不正确呗，贴上你的代码才能看出来具体问题