JBuilder2005+JBoss-4.0.2RC1+J2SDK1.5+Log4j 开发Session Bean例解(2)

王朝java/jsp·作者佚名  2006-01-31
窄屏简体版  字體: |||超大  

作者:Junsan Jin

日期:2005-3-30

版本:1.0

信箱:junsan21@126.com ; junnef21@sohu.com

声明:本人保留本文的所有权利。

第二部分:配置Log4j

Log4j主要是针对java的日志文件产生管理包,这里使用logging-log4j-1.2.9。解压logging-log4j-1.2.9的压缩包,任意路径即可,这里是D:\logging-log4j-1.2.9。

先在JBuilder中建立工程,然后引入log4j库文件。

新建工程:

选择菜单:new project…,name为Trader,点击finish。

这里工程目录为:E:\projects\Trader。

拷贝类库:

在trader文件夹下新建lib文件夹,拷贝D:\logging-log4j-1.2.9\dist\lib\log4j-1.2.9.jar到E:\projects\Trader\lib下。

将类库引入工程:

选择菜单:project〉project properties 〉Paths 〉右边Tab页Required Libraries > Add > Tab页Archives,选择E:\projects\Trader\lib,右边的列表框中选择log4j-1.2.9.jar,一路ok即可。

新建web模块:

选择菜单:New 〉 Web 〉Web module(WAR)〉 OK按钮 〉Create Empty Web Module 〉 Next按钮,填入名称WebTrader,点击Finish按钮。

增加properties配置文件:

在JBuilder左边的菜单树上选择WebTrader 〉Module Directory 〉选中WEB-INF 〉右键new 〉File,填入log4j.properties确定即可。

编辑log4j.properties的内容如下:

-------------------------------------------------

log4j.properties

--------------------------------------------------

# 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.

log4j.rootCategory=, A1

# A1 is set to be a FileAppender which outputs to the file

# "factor.log". Start the server NumberCruncherServer and two

# NumberCruncherClients, and ask to factor two numbers

# near-simultaneously. Notice that the log output from these two

# requests are logged in the file factor.log. Nevertheless, the logs

# of these requests can still be distinguished given their distinct

# nested diagnostic contexts.

log4j.appender.A1=org.apache.log4j.FileAppender

log4j.appender.A1.File=${jboss.server.home.dir}/log/trader.log

log4j.appender.A1.layout=org.apache.log4j.PatternLayout

# Note the %x conversion specifier for NDC printing.

# log4j.appender.A1.layout.ConversionPattern=%-4r %-5p [%t] (%x) - %m\n

log4j.appender.A1.layout.ConversionPattern=%d [%t] %-5p %c - %m%n

Log4j.appender.A1.MaxFileSize=100KB

增加log4j环境初始化类:

右键点击菜单树中Trader.jpx 〉 New 〉Package,填入com.inspiresky.trader.init,确定即可。

右键点击新建的init包〉new 〉class,名字为Log4jInit.java,确定所在包为com.inspiresky.trader.init,点击OK键即可。

编辑Log4jInit.java的内容如下:

-----------------------------------------------------

Log4jInit.java

-----------------------------------------------------

package com.inspiresky.trader.init;

import org.apache.log4j.PropertyConfigurator;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.PrintWriter;

import java.io.IOException;

import javax.servlet.ServletException;

public class Log4jInit extends HttpServlet {

//Initialize global variables

public void init() throws ServletException {

String prefix = getServletContext().getRealPath("/");

String file = getInitParameter("log4j-init-file");

// if the log4j-init-file is not set, then no point in trying

if(file != null) {

PropertyConfigurator.configure(prefix+file);

}

}

public void doGet(HttpServletRequest req, HttpServletResponse res) {

}

//Clean up resources

public void destroy() {

}

}

配置web.xml文件:

在JBuilder左边的菜单树上选择WebTrader 〉Module Directory 〉WEB-INF 下,打开web.xml,在<display-name>WebTrader</display-name>下增加如下内容:

<servlet>

<servlet-name>log4j-init</servlet-name>

<servlet-class>com.inspiresky.trader.init.Log4jInit</servlet-class>

<init-param>

<param-name>log4j-init-file</param-name>

<param-value>WEB-INF/log4j.properties</param-value>

</init-param>

<load-on-startup>1</load-on-startup>

</servlet>

OK,至此我们的Log4j已经可以正常使用了。(未完待续)

 
 
 
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