[url]http://kin111.blog.51cto.com/738881/158612[/url]
Log4j中的LogFactor5是Log4j的Appender的一个实现。LogFactor5可以图形的形式表示log信息。并且可以对表示的Log信息进行筛选。适合于使用Log4j时查看log的调试。
本文简单介绍LogFactor5的使用方法。
本文示例使用的Log4j版本为：apache-log4j-1.2.15
1。运行LogFactor5的简单方法：
在有log4j-1.2.15.jar文件的目录下从命令行执行：
java -classpath .;log4j-1.2.15.jar org.apache.log4j.lf5.StartLogFactor5即可
表示出一个GUI图形界面。如下图
[img]http://kin111.blog.51cto.com/attachment/200905/200905161242543082026.jpg[/img]
从File菜单选OPEN菜单，从文件选择对话框中选择\apache-log4j-1.2.15\examples\lf5\OpeningLogFiles\sample.log文件后，GUI图形界面内容变化，即可表示出log内容。如下图
[img]http://kin111.blog.51cto.com/attachment/200905/200905161242543107996.jpg[/img]
2。生成可以被LogFactor5GUI图形界面表示的Log方法。
这需要使用Class LF5Appender。这个Class位于org.apache.log4j.lf5包中。
有很多方法可以调用到LF5Appender。
最简单的一种方法如下：
使用DefaultLF5Configurator.configure();
示例代码：
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package examples.lf5.InitUsingDefaultConfigurator;
import org.apache.log4j.Logger;
import org.apache.log4j.NDC;
import org.apache.log4j.lf5.DefaultLF5Configurator;
import java.io.IOException;
/**
* This class is a simple example of how to configure the LogFactor5
* logging window using the DefaultLF5Configurator.
*
* The DefaultLF5Configurator uses a default configuration file stored
* in the log4j.jar in order to provide a default configuration for
* the LF5Appender.
*
* @author Brent Sprecher
*/
// Contributed by ThoughtWorks Inc.
public class InitUsingDefaultConfigurator {
//--------------------------------------------------------------------------
// Constants:
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Protected Variables:
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Private Variables:
//--------------------------------------------------------------------------
private static Logger logger =
Logger.getLogger(InitUsingDefaultConfigurator.class);
//--------------------------------------------------------------------------
// Constructors:
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Public Methods:
//--------------------------------------------------------------------------
public static void main(String[] args) throws IOException {
// Configure the LF5Appender using the DefaultLF5Configurator. This
// will add the LF5Appender to the root of the Category tree.
DefaultLF5Configurator.configure();
// Add an NDC to demonstrate how NDC information is output.
NDC.push("#23856");
// Log some information.
for (int i = 0; i < 10; i++) {
logger.debug("Hello, my name is Homer Simpson.");
logger.info("Mmmmmm .... Chocolate.");
logger.warn("Mmm...forbidden donut.");
}
// Clean up NDC
NDC.pop();
NDC.remove();
NDC.push("Another NDC");
// Log some information.
logger.fatal("Hello, my name is Bart Simpson.");
logger.error("Hi diddly ho good neighbour.");
// Clean up NDC
NDC.pop();
NDC.remove();
// Call methods on both classes.
InitUsingDefaultConfigurator.foo();
InnerInitUsingDefaultConfigurator.foo();
logger.info("Exiting InitUsingDefaultConfigurator.");
}
public static void foo() {
logger.debug("Entered foo in InitUsingDefaultConfigurator class");
NDC.push("#123456");
logger.debug("Hello, my name is Marge Simpson.");
logger.info("D'oh!! A deer! A female deer.");
// Clean up NDC
NDC.pop();
NDC.remove();
}
//--------------------------------------------------------------------------
// Protected Methods:
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Private Methods:
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Nested Top-Level Classes or Interfaces:
//--------------------------------------------------------------------------
public static class InnerInitUsingDefaultConfigurator {
static Logger logger =
Logger.getLogger(InnerInitUsingDefaultConfigurator.class.getName());
static void foo() throws IOException {
// Configure the LF5Appender again. You can call
// DefaultLF5Configurator.configure() as often as you want
// without unexpected behavior.
DefaultLF5Configurator.configure();
logger.info("Entered foo in InnerInitUsingDefaultConfigurator class.");
}
}
}编译：
javac -classpath .;log4j-1.2.15.jar InitUsingDefaultConfigurator.java
得到InitUsingDefaultConfigurator$InnerInitUsingDefaultConfigurator.class
和InitUsingDefaultConfigurator.class执行：
java -classpath .;log4j-1.2.15.jar examples.lf5.InitUsingDefaultConfigurator.InitUsingDefaultConfigurator会启动LogFactor5的图形界面，并把输出Log的内容表示到界面中。如下图：
[img]http://kin111.blog.51cto.com/attachment/200905/200905161242543142205.jpg[/img]
3，LogFactor5的Log的格式
LogFactor5的Log的格式是固定的。如下示例
中括号的规定的标记。
[slf5s.start]26 Jul 2001 15:54:44,673[slf5s.DATE]
DEBUG[slf5s.PRIORITY]
[slf5s.NDC]
main[slf5s.THREAD]
examples.InitUsingMultipleAppenders.InitUsingMultipleAppenders[slf5s.CATEGORY]
examples.InitUsingMultipleAppenders.InitUsingMultipleAppenders.main(InitUsingMultipleAppenders.java:102)[slf5s.LOCATION]
Hello, my name is Homer Simpson.[slf5s.MESSAGE]4，LogFactor5的package简介
org.apache.log4j.lf5 主要是appender,configurator,level,封装的log记录类,和启动类等等.
org.apache.log4j.lf5.util 主要是LogFactor5的实用类,读资源,处理流,swing的一些共通处理
org.apache.log4j.lf5.viewer 主要是gui的主窗口,各个dialog,表示log用的table,tablemodel等类
org.apache.log4j.lf5.viewer.categoryexplorer 主要是主窗口左边的category流览tree表示swing组件的支持的类
org.apache.log4j.lf5.viewer.configure 主要是处理最近打开文件历史,配置保存读取类
