log4j中怎样将异常的完整信息写入日志文件?????
比如说,现在出现如下异常:java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:468)
at java.lang.Integer.parseInt(Integer.java:497)
at qing.log.struts.action.LiuAction.execute(LiuAction.java:44)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)怎样将上面的内容记录到日志文件中???
比如说,现在出现如下异常:java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:468)
at java.lang.Integer.parseInt(Integer.java:497)
at qing.log.struts.action.LiuAction.execute(LiuAction.java:44)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)怎样将上面的内容记录到日志文件中???
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=D://info.log //这里设置日志文件输出路径
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %m %n
log4j.rootLogger=DEBUG, file//定义一个类
public class LogInfo {
Logger logger = Logger.getLogger(LogInfo.class.getName());/**
* 系统管理
*/
/**
* @param addmin(String
* name,String addname)添加管理员
* @param name
* String
* @param addname
* String
*/
public void addadmin(String name, String addname) {
try {
logger.debug("管理员:" + name + "添加" + addname + "为管理员");
} catch (Exception ex) {
logger.info(ex.getMessage());
}
}
//……各种各样的方法自己定义
}当对数据库进行了一次操作!
new LogInfo().addadmin(u.getUserName(),userName);//记录到日志中
这样就可以生成日志信息了!
在catch处调用该方法即可!
new LogInfo().addadmin(u.getUserName(),userName);//记录到日志中
调用方法后!在捕获异常的同时!信息也就直接写到info.log里面了啊!
log4j.appender.file.File=D://info.log
//配置好你日志文件存放的位置即可!
/**
* org.apache.log4j.Logger
*
* private static Logger log = Logger.getLogger("在log4j.properties文件中的 appenderName");
* 把log4j.properties 放在src下.
* log4j.properties 包含的内容如下:
* log4j.rootLogger = [priority] , appenderName -- appenderName 为该日志的名称 , 可以为多个。
* log4j.appender 为 输出源 指定信息输出的地址: ConsoleAppender为控制台、RollingFileAppender 为文件大小到指定尺寸产生一个新的文件
* log4j.appender.layout 设置 输出源 显示格式.
*
*
* 例如:
* 配置 log4j.properties
* log4j.rootLogger = ALL,Mylog,R
* log4j.appender.Mylog = org.apache.log4j.ConsoleAppender
* log4j.appender.Mylog.layout = org.apache.log4j.PatternLayout
* log4j.appender.Mylog.layout.conversionPattern = %d %p %c --> %m%n
*
*
* 指定日志文件放的位置
* log4j.appender.R.File=D:/env/environment/webEnv/WEB-INF/log4j.log
* log4j.appender.R.MaxFileSize=100KB
* log4j.appender.R.MaxBackupIndex=1
* log4j.appender.R.layout=org.apache.log4j.PatternLayout
* log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n
* log4j.appender.R.layout.ConversionPattern=%d %-5p [%t] (%13F:%L) %3x - %m%n
* ---------------------------------------------------------------------------
*
* 在程序中:
* Logger logger = Logger.getLogger("Mylog");
* PropertyConfigurator.configure("log4j.properties"); -- 自动快速的使用默认Log4j环境
* logger.debug("");
* logger.info("");
* logger.error("");
* logger.fatal("");
* logger.warn("");
*
* 那个类使用日志 则参照上面代码即可。
*
*
*/
这是我总结的LOG4J %m%n 就是输入详细信息。。
public String getTrace(Throwable t) {
StringWriter stringWriter= new StringWriter();
PrintWriter writer= new PrintWriter(stringWriter);
t.printStackTrace(writer);
StringBuffer buffer= stringWriter.getBuffer();
return buffer.toString();
}