log4j自定义输出级别和输出信息
log4j自定义输出级别和输出信息
- 1.在web.xml中添加一个过滤器
- 2.过滤器Log4jFilter.java
- 3.自定义日志级别过滤器CustomLogFilter.java
- 4.自定义日志级别CustomLog.java
- 5.配置log4j.xml输出
- 6.测试日志输出TestLogController.java
- 7.测试结果
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SSM框架搭建Web项目
log4j.xml配置详解
我们定义一个CUSTOMLOG1级别，自定义输出信息为访问者ip和属性attr。
1.在web.xml中添加一个过滤器
<filter>
<filter-name>Log4jFilterfilter-name>
<filter-class>cn.com.mydemo.interceptor.Log4jFilterfilter-class>
filter>
<filter-mapping>
<filter-name>Log4jFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
2.过滤器Log4jFilter.java
package cn.com.mydemo.interceptor;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.apache.log4j.MDC;
/**
* @Description 日志过滤器
* @author jjy
* @create 2019-06-19
*/
public class Log4jFilter implements Filter{
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
//获取访问者ip
String ip = request.getRemoteAddr();
//log4j通过访问MDC中存入的键值对获取自定义属性，写法为%X{ip}(ip为MDC放入的key)
MDC.put("ip", ip);
try {
chain.doFilter(request, response);
} catch (Exception e) {
e.printStackTrace();
}
//清空MDC
if(MDC.getContext() != null) {
MDC.getContext().clear();
}
}
@Override
public void destroy() {
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
}
3.自定义日志级别过滤器CustomLogFilter.java
package cn.com.mydemo.interceptor;
import org.apache.log4j.spi.Filter;
import org.apache.log4j.spi.LoggingEvent;
/**
* @Decription 自定义日志级别过滤器
* @author jjy
* @create 2019-06-19
*/
public class CustomLogFilter extends Filter{
boolean acceptOnMatch = false;
private String levelMin;
private String levelMax;
public boolean isAcceptOnMatch() {
return acceptOnMatch;
}
public void setAcceptOnMatch(boolean acceptOnMatch) {
this.acceptOnMatch = acceptOnMatch;
}
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;
}
@Override
public int decide(LoggingEvent paramLoggingEvent) {
int inputLevel = paramLoggingEvent.getLevel().toInt();
if(inputLevel >= getLevel(levelMin) && inputLevel <= getLevel(levelMin)) {
return 0;
}
return -1;
}
private int getLevel(String level) {
level = level.toUpperCase();
if(level.equals("CUSTOMLOG1")) {
return LevelType.CUSTOMLOG1.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),
CUSTOMLOG1(30050);
int type;
public int getType() {
return type;
}
private LevelType(int type) {
this.type = type;
}
}
}
4.自定义日志级别CustomLog.java
package cn.com.mydemo.interceptor;
import org.apache.log4j.Level;
import org.apache.log4j.net.SyslogAppender;
/**
* @Decription 自定义日志级别
* @author jjy
* @create 2019-06-19
*/
package cn.com.infosec.ra.system.interceptor;
import org.apache.log4j.Level;
import org.apache.log4j.net.SyslogAppender;
public class CustomLog extends Level{
private static final long serialVersionUID = 1L;
private CustomLog(int level, String levelStr, int syslogEquivalent) {
super(level, levelStr, syslogEquivalent);
}
//自定义级别名称，以及级别范围
public static final Level CUSTOMLOG1 = new CustomLog(30051, "CUSTOMLOG1", SyslogAppender.LOG_LOCAL0);
}
5.配置log4j.xml输出
我们将自定义级别单独输出一个文件，在log4j添加以下代码
<appender name="customlog1" class="org.apache.log4j.DailyRollingFileAppender">
<param name="File" value="${catalina.base}/logs/mydemo/customlog1.log"/>
<param name="Append" value="true"/>
<param name="DatePattern" value="yyyy-MM-dd"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%d{yyy-MM-dd HH:mm:ss,SSS}] [%c] [%M] [%L] [%X{attr}] - [%m] %n"/>
layout>
<filter class="cn.com.mydemo.interceptor.CustomLogFilter">
<param name="LevelMin" value="CUSTOMLOG1" />
<param name="LevelMax" value="CUSTOMLOG1" />
filter>
appender>
在root节点中添加以下代码
<appender-ref ref="customlog1"/>
6.测试日志输出TestLogController.java
package cn.com.mydemo.controller;
import org.apache.log4j.Logger;
import org.apache.log4j.MDC;
import org.springframework.web.bind.annotation.RequestMapping;
import cn.com.mydemo.interceptor.CustomLog;
@Controller
public class TestLogController {
private static Logger logger = Logger.getLogger(TestLogController.class);
@RequestMapping(value = "/testLog")
public String testLog() {
MDC.put("attr", "自定义属性");
logger.log(CustomLog.CUSTOMLOG1, "自定义日志级别");
return "login";
}
}
7.测试结果
