BlogJava-HotJava-随笔分类-J2EEhttp://www.blogjava.net/HotJava/category/15574.htmlzh-cnThu, 01 Mar 2007 15:35:45 GMTThu, 01 Mar 2007 15:35:45 GMT60java程序员面试之150++ http://www.blogjava.net/HotJava/archive/2006/11/02/78780.htmlHotJavaHotJavaThu, 02 Nov 2006 13:33:00 GMThttp://www.blogjava.net/HotJava/archive/2006/11/02/78780.htmlhttp://www.blogjava.net/HotJava/comments/78780.htmlhttp://www.blogjava.net/HotJava/archive/2006/11/02/78780.html#Feedback0http://www.blogjava.net/HotJava/comments/commentRss/78780.htmlhttp://www.blogjava.net/HotJava/services/trackbacks/78780.html阅读全文

HotJava 2006-11-02 21:33 发表评论
]]>常用log4j配置http://www.blogjava.net/HotJava/archive/2006/10/10/74354.htmlHotJavaHotJavaTue, 10 Oct 2006 11:02:00 GMThttp://www.blogjava.net/HotJava/archive/2006/10/10/74354.htmlhttp://www.blogjava.net/HotJava/comments/74354.htmlhttp://www.blogjava.net/HotJava/archive/2006/10/10/74354.html#Feedback0http://www.blogjava.net/HotJava/comments/commentRss/74354.htmlhttp://www.blogjava.net/HotJava/services/trackbacks/74354.html 常用log4j配置，一般可以采用两种方式，.properties和.xml,下面举两个简单的例子：
一、log4j.properties
### 设置org.zblog域对应的级别INFO,DEBUG,WARN,ERROR和输出地A1，A2 ##
log4j.category.org.zblog=ERROR,A1
log4j.category.org.zblog=INFO,A2
log4j.appender.A1=org.apache.log4j.ConsoleAppender
### 设置输出地A1，为ConsoleAppender(控制台) ##
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
### 设置A1的输出布局格式PatterLayout,(可以灵活地指定布局模式）##
log4j.appender.A1.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%c]-[%p] %m%n
### 配置日志输出的格式##
log4j.appender.A2=org.apache.log4j.RollingFileAppender
### 设置输出地A2到文件（文件大小到达指定尺寸的时候产生一个新的文件）##
log4j.appender.A2.File=E:/study/log4j/zhuwei.html
### 文件位置##
log4j.appender.A2.MaxFileSize=500KB
### 文件大小##
log4j.appender.A2.MaxBackupIndex=1
log4j.appender.A2.layout=org.apache.log4j.HTMLLayout
##指定采用html方式输出
二、log4j.xml
<?xml version="1.0" encoding="GB2312" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="org.zblog.all" class="org.apache.log4j.RollingFileAppender">
<!-- 设置通道ID:org.zblog.all和输出方式：org.apache.log4j.RollingFileAppender -->
   <param name="File" value="E:/study/log4j/all.output.log" /><!-- 设置File参数：日志输出文件名 -->
   <param name="Append" value="false" /><!-- 设置是否在重新启动服务时，在原有日志的基础添加新日志 -->
   <param name="MaxBackupIndex" value="10" />
   <layout class="org.apache.log4j.PatternLayout">
       <param name="ConversionPattern" value="%p (%c:%L)- %m%n" /><!-- 设置输出文件项目和格式 -->
   </layout>
</appender>
<appender name="org.zblog.zcw" class="org.apache.log4j.RollingFileAppender">
   <param name="File" value="E:/study/log4j/zhuwei.output.log" />
   <param name="Append" value="true" />
   <param name="MaxFileSize" value="10240" /> <!-- 设置文件大小 -->
   <param name="MaxBackupIndex" value="10" />
   <layout class="org.apache.log4j.PatternLayout">
       <param name="ConversionPattern" value="%p (%c:%L)- %m%n" />
   </layout>
</appender>
<logger name="zcw.log"> <!-- 设置域名限制，即zcw.log域及以下的日志均输出到下面对应的通道中 -->
   <level value="debug" /><!-- 设置级别 -->
   <appender-ref ref="org.zblog.zcw" /><!-- 与前面的通道id相对应 -->
</logger>
<root> <!-- 设置接收所有输出的通道 -->
   <appender-ref ref="org.zblog.all" /><!-- 与前面的通道id相对应 -->
</root>
</log4j:configuration>
三、配置文件加载方法：
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
import org.apache.log4j.xml.DOMConfigurator;
public class Log4jApp {
   public static void main(String[] args) {
       DOMConfigurator.configure("E:/study/log4j/log4j.xml");//加载.xml文件
       //PropertyConfigurator.configure("E:/study/log4j/log4j.properties");//加载.properties文件
       Logger log=Logger.getLogger("org.zblog.test");
       log.info("测试");
   }
}
四、项目使用log4j
在web 应用中，可以将配置文件的加载放在一个单独的servlet中，并在web.xml中配置该servlet在应用启动时候加载。对于在多人项目中，可以给每一个人设置一个输出通道，这样在每个人在构建Logger时，用自己的域名称，让调试信息输出到自己的log文件中。
五、常用输出格式
# -X号:X信息输出时左对齐；
# %p:日志信息级别
# %d{}:日志信息产生时间
# %c:日志信息所在地（类名）
# %m:产生的日志具体信息
# %n:输出日志信息换行


HotJava 2006-10-10 19:02 发表评论
]]>各个框架缺点http://www.blogjava.net/HotJava/archive/2006/10/05/73466.htmlHotJavaHotJavaThu, 05 Oct 2006 07:05:00 GMThttp://www.blogjava.net/HotJava/archive/2006/10/05/73466.htmlhttp://www.blogjava.net/HotJava/comments/73466.htmlhttp://www.blogjava.net/HotJava/archive/2006/10/05/73466.html#Feedback0http://www.blogjava.net/HotJava/comments/commentRss/73466.htmlhttp://www.blogjava.net/HotJava/services/trackbacks/73466.html下面开始比较各个框架，仅摘要如下，请恕本人只看缺点，不看优点。因为优点是说不完的
Struts: used since June 2001 - same time 1.0 was released.
Spring MVC: used since January 2004 - before 1.0 was released.
WebWork: used since July 2004.
Tapestry: used since July 2004.
JSF: used since July 2004 - both Sun’s RI and MyFaces. 

Struts缺点：

ActionForms - they’re a pain
Can’t unit test - StrutsTestCase only does integration
Project has been rumored as “dead”

Display Tag：

Spring MVC缺点：

Configuration intensive - lots of XML
Requires writing lots of code in JSPs
Almost too flexible - no common parent Controller

WebWork缺点：

Small Community
Documentation is poorly organized

Tapestry缺点：

Documentation very conceptual, rather than
pragmatic
Steep learning curve - very few examples
Long release cycles - major upgrades every year

JSF缺点：

Tag soup for JSPs
Doesn't play well with REST or Security
No single source for implementation

SiteMesh：

 

IDE支持

Struts has a lot of IDE support and even has frameworks built on top of it (i.e. Beehive’s PageFlow)
Spring has Spring IDE - only does XML validation, not a UI/web tool
WebWork has EclipseWork
Tapestry has Spindle - great for coders
JSF has many, and they're getting better and better



HotJava 2006-10-05 15:05 发表评论
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