开启log4j提供的INFO日志级别，每天生成的日志文件就会变得越来越大。
有时需要写个定时任务来删除这个文件。
为了只输出所需的日志级别，唯有自己定义一个log4j的级别，便于日志文件的灵活控制，而且不需要对之前的代码进行修改。
1、CustomerLog
复制代码 代码示例:
package common.log;
import org.
apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.net.SyslogAppender;
public class CustomerLog {
/**
* 继承Level
* @author Sevencm
*
*/
private static class CustomerLogLevel extends Level{
public CustomerLogLevel(int level, String levelStr, int syslogEquivalent) {
super(level, levelStr, syslogEquivalent);
}
}
/**
* 自定义级别名称，以及级别范围
*/
private static final Level CustomerLevel = new CustomerLogLevel(20050,"CUSTOMER",SyslogAppender.LOG_LOCAL0);
/**
* 使用日志打印logger中的log方法
*
* @param logger
* @param objLogInfo
*/
public static void customerLog(Logger logger,Object objLogInfo){
logger.log(CustomerLevel, objLogInfo);
}
}
2、Log Filter
复制代码 代码示例:
package common.log;
import org.apache.log4j.spi.Filter;
import org.apache.log4j.spi.LoggingEvent;
public class CustomerLogFilter extends Filter {
boolean acceptOnMatch = false;
private String levelMin;
private String levelMax;
public String getLevelMin() {
return levelMin;
}
public void setLevelMin(String levelMin) {
this.levelMin = levelMin;
}
public String getLevelMax() {
return levelMax;
}
public void setLevelMax(String levelMax) {
this.levelMax = levelMax;
}
public boolean isAcceptOnMatch() {
return acceptOnMatch;
}
public void setAcceptOnMatch(boolean acceptOnMatch) {
this.acceptOnMatch = acceptOnMatch;
}
@Override
public int decide(LoggingEvent lgEvent) {
int inputLevel = lgEvent.getLevel().toInt();
if(inputLevel>=getLevel(levelMin) && inputLevel <= getLevel(levelMax)){
return 0;
}
return -1;
}
private int getLevel(String level){
level = level.toUpperCase();
if(level.equals("CUSTOMER")){
return LevelType.CUSTOMER.getType();
}
if(level.equals("OFF")){
return LevelType.OFF.getType();
}
if(level.equals("FATAL")){
return LevelType.FATAL.getType();
}
if(level.equals("ERROR")){
return LevelType.ERROR.getType();
}
if(level.equals("INFO")){
return LevelType.INFO.getType();
}
if(level.equals("WARN")){
return LevelType.WARN.getType();
}
if(level.equals("DEBUG")){
return LevelType.DEBUG.getType();
}
if(level.equals("ALL")){
return LevelType.ALL.getType();
}
return LevelType.OFF.getType();
}
private static enum LevelType{
OFF(2147483647),
FATAL(50000),
ERROR(40000),
WARN(30000),
INFO(20000),
DEBUG(10000),
ALL(-2147483648),
CUSTOMER(20050);
int type;
public int getType() {
return type;
}
private LevelType(int type) {
this.type = type;
}
}
}
3、配置文件的设置：
复制代码 代码示例:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/' >
<appender name="Console" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d [%p] %c{1} - %m%n" />
</layout>
<!--过滤器设置输出的级别 -->
<filter class="common.log.CustomerLogFilter">
<param name="levelMin" value="info" />
<param name="levelMax" value="Customer" />
<param name="AcceptOnMatch" value="true" />
</filter>
</appender>
<!-- 根logger的设置-->
<root>
<priority value ="INFO"/>
<appender-ref ref="Console"/>
</root>
</log4j:configuration>
4、测试类
复制代码 代码示例:
package common.test;
import org.apache.log4j.Logger;
import common.log.CustomerLog;
public class Test {
private static final Logger logger = Logger.getLogger("customer");
public static void main(String[] args) {
CustomerLog.customerLog(logger, "自定义日志级别");
logger.info("哈哈哈哈");
}
}
5、运行结果：
2014-05-24 17:22:45,647 [CUSTOMER] customer - 自定义日志级别
2014-05-24 17:22:45,648 [INFO] customer - 哈哈哈哈
6、通过修改
<param name="levelMin" value="info" />
以上 Value 值用于控制日志输出级别。
