在eclipse里使用log4j记录程序日志

1.下载eclipse和log4j相关软件

2.在eclipse中建立一个java项目，比如HelloEclipse,在此过程中add 外部jar log4j.jar文件

3。利用eclipse的import功能引入log4j.properties文件，并且进行修改，log4j在你下载的log4j包的example/lf/lf5里就有

如下：

# For the general syntax of property based configuration files see the

# documenation of org.apache.log4j.PropertyConfigurator.

# The root category uses the appender called A1. Since no priority is

# specified, the root category assumes the default priority for root

# which is DEBUG in log4j. The root category is the only category that

# has a default priority. All other categories need not be assigned a

# priority in which case they inherit their priority from the

# hierarchy.

# 如果是弹出log4j log记录器

#log4j.rootCategory=, A1

# 直接在eclipse控制台中显示log纪录

log4j.rootCategory=, B1

# A1 is set to be a LF5Appender which outputs to a swing

# logging console.

#log4j.appender.A1=org.apache.log4j.lf5.LF5Appender

#log4j.appender.A1.MaxNumberOfRecords=1000

log4j.appender.B1=org.apache.log4j.ConsoleAppender

log4j.appender.B1.layout=org.apache.log4j.PatternLayout

log4j.appender.B1.layout.ConversionPattern=%-4r % -5p [%t] % 37c %3x - %m%n

log4j.appender.B1.layout.ConversionPattern=%5p [%t] (%F:%L) -%m%n

4。写HelloEclipse代码如下：

import org.apache.log4j.*;

class HelloEclipse{

static Logger logger=Logger.getLogger(HelloEclipse.class.getName());

public static void main(String args[])

{

PropertyConfigurator.configure("Log4j.properties");

HelloEclipse.logger.info("纪录测试");

int valueoflover=1;

HelloEclipse.logger.info("valueoflover" + valueoflover);

}

运行，就可以看到如下log信息了

INFO [main] (HelloEclipse.java:7) -纪录测试

INFO [main] (HelloEclipse.java:9) -valueoflover1