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web app的log4j应用
web app的log4j应用
1 建立log.properties
log level定为info，不显示debug信息。log输出依次为文件，控制台
log4j.rootlogger=info,r,console
#debug,console
log4j.addivity.org.apache=true
###################
# console appender
###################
log4j.appender.console=org.apache.log4j.consoleappender
log4j.appender.threshold=debug
log4j.appender.console.target=system.out
log4j.appender.console.layout=org.apache.log4j.patternlayout
log4j.appender.console.layout.conversionpattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
#####################
# file appender，文件满100kb，自动生成file.log.n
#####################
log4j.appender.r=org.apache.log4j.rollingfileappender
log4j.appender.r.file=d:\\file.log
log4j.appender.r.maxfilesize=100kb
# keep one backup file
log4j.appender.r.maxbackupindex=1
log4j.appender.r.layout=org.apache.log4j.patternlayout
log4j.appender.r.layout.conversionpattern=%p %t %c - %m%n
2 建立初始化action
servletimport com.nova.colimas.web.constants.*;
import org.apache.log4j.*;
public class startupservlet extends action {
public actionforward execute(actionmapping mapping,
actionform form,
httpservletrequest request,
httpservletresponse response)
throws exception{
try{
//初始化log
initlog();
}catch(exception e){
e.printstacktrace();
return mapping.findforward("failure");
}
logger logger = logger.getlogger(this.getclass());
logger.info("init log...");
}
private void initlog() throws exception{
//获得log.properties绝对地址
java.net.url myfile=this.getclass().getresource("/resources/log/properties");
//加载log配置文件log.properties
if(myfile.getpath()!=null)
propertyconfigurator.configure(myfile.getpath());
else
throw new exception("no log configure");
}
}
3 写log
public class loginaction extends action {
logincontext logincontext=null;
loginform loginform=null;
public actionforward execute(actionmapping mapping,
actionform form,
httpservletrequest request,
httpservletresponse response)
throws exception{
logger logger = logger.getlogger(this.getclass());
logger.info("login success");
return mapping.findforward("success");
}
}log文件内容如下：
info http-8080-processor24 com.nova.colimas.web.action.startupservlet - init colimas...
info http-8080-processor24 com.nova.colimas.web.action.startupservlet - init security successfully
info http-8080-processor24 com.nova.colimas.web.action.startupservlet - init dao successfully
info http-8080-processor24 com.nova.colimas.web.action.loginaction - login success
