(OAF)jdeveloper集成log4j并将日志输出到指定文件并写入数据库

参考：

How to configure Log4j in JDev 11g

Ever wanted to use log4j in your adf project ? Well though Oracle doesn’t recommends the use of log4j, i say its purely your choice to use it or not.

So how do we configure log4j in adf  ? Pretty simple..just follow these steps

1) Add log4j jars in the project library

2) Create a file log4j.properties in your Application Sources Directory (this folder is seen in jdev – in both ViewController and Model Folder).

For Model project this file has to be present at <path of model project>Model\src.

For ViewController project this file has to be present as <path of model project>ViewController\src

3) Paste the following contents

****************************

# Set root logger level to INFO and its only appender to ConsoleOut.
log4j.rootLogger=INFO,ConsoleOut,F
# ConsoleOut is set to be a ConsoleAppender.
log4j.appender.ConsoleOut=org.apache.log4j.ConsoleAppender
# ConsoleOut uses PatternLayout.
log4j.appender.ConsoleOut.layout=org.apache.log4j.PatternLayout
log4j.appender.ConsoleOut.layout.ConversionPattern=%-5p: [%d] %c{1} – %m%n
log4j.logger.org.apache.jsp=DEBUG
log4j.appender.F=org.apache.log4j.FileAppender
log4j.appender.F.File=C:/Logs/Logger.log
log4j.appender.F.layout=org.apache.log4j.PatternLayout
log4j.appender.F.layout.ConversionPattern=%d{MM-dd@HH:mm:ss,SSS} %-5p (%13F:%L) %3x – %m%n

#Addon for
com.sun.faces.level=FINE

****************************

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集成开发测试

1.将log4j jars添加至项目中。

2.新建log4j.properties并将其放入myclasses目录（oacore中将该文件放入$JAVA_TOP目录中），并在其中添加以下内容

3.log4j.properties中的内容（此文件只是一个简略的日志使用，更详细的日志生成设置，请参考官方文档及他人学习笔记）

# Set root logger level to INFO and its only appender to ConsoleOut.
log4j.rootLogger=INFO,ConsoleOut,F,DATABASE
# ConsoleOut is set to be a ConsoleAppender.
log4j.appender.ConsoleOut=org.apache.log4j.ConsoleAppender
# ConsoleOut uses PatternLayout.
log4j.appender.ConsoleOut.layout=org.apache.log4j.PatternLayout
log4j.appender.ConsoleOut.layout.ConversionPattern=%-5p: [%d] %c{1} – %m%n
log4j.logger.org.apache.jsp=DEBUG
log4j.appender.F=org.apache.log4j.FileAppender
#由于本地windows系统默认支持中文，所以本地即使不配置编码方式也不会乱码，若在服务器乱码，请调整编码方式
log4j.appender.F.Encoding=GBK
#会将日志文件生成到指定的目录，例如工程在D盘，则生成至D盘的Logs目录
#log4j.appender.F.File=/Logs/Logger.txt

#本地测试时，会将日志文件生成至\jdevhome\jdev\system\oracle.j2ee.10.1.3.41.57\embedded-oc4j\config\logs目录
#服务器上会将日志生成至apps/tech_st/10.1.3/j2ee/home/logs目录
#服务器若有多个oacore节点，生成的日志结果暂时还不清楚
log4j.appender.F.File=./logs/Logger.txt
log4j.appender.F.DatePattern='.'yyyy-MM-dd
log4j.appender.F.layout=org.apache.log4j.PatternLayout
#log4j.appender.F.layout.ConversionPattern=%d{yyyy-MM-dd@HH:mm:ss,SSS} %-5p (%13F:%L) %3x – %m%n
log4j.appender.F.layout.ConversionPattern=%d{yyyy-MM-dd@HH:mm:ss,SSS} %-5p %c.%M:%L - %m%n

#DATABASE

log4j.appender.DATABASE=org.apache.log4j.jdbc.JDBCAppender
log4j.appender.DATABASE.URL=jdbc:oracle:thin:@host:port:SID
log4j.appender.DATABASE.driver=oracle.jdbc.driver.OracleDriver
log4j.appender.DATABASE.user=USERNAME
log4j.appender.DATABASE.password=PASSWORD
log4j.appender.CONSOLE.Threshold=ERROR
log4j.appender.DATABASE.sql=INSERT INTO LOG4J_TEST(stamp,thread, infolevel,class,messages) VALUES ('%d{yyyy-MM-dd HH:mm:ss}', '%t', '%p', '%l', '%m')

# INSERT INTO LOG4J (Message) VALUES ('[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n')

# 写入数据库中的表LOG4J的Message字段中，内容％d（日期）%c: 日志信息所在地（类名）%p: 日志信息级别%m: 产生的日志具体信息 %n: 输出日志信息换行
log4j.appender.DATABASE.layout=org.apache.log4j.PatternLayout
log4j.appender.DATABASE.layout.ConversionPattern=%d %-5p [%c] %m%n

#Addon for
com.sun.faces.level=FINE

4.代码

import org.apache.log4j.Logger;

public class XXXCO
  extends OAControllerImpl
{

private static Logger logger = Logger.getLogger(XXXCO.class.getName());

  public void processRequest(OAPageContext pageContext,
                             OAWebBean webBean)
  {
logger.info("测试 123");
   }

}