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SpringBoot中怎样基于slf4j封装日志类输出日志


场景

slf4jGithub:

​​https://github.com/qos-ch/slf4j​​

实现

新建log包,包下新建Log.java

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.HashMap;
import java.util.Map;

public class Log {
private static String logPrefix = "badao log -> ";
private static Log instance;
private static Logger logger = null;
private static Map<Class, Logger> loggerList = new HashMap<Class, Logger>(); //用于缓存logger对象

/**
* 定义私有构造方法实现单例
*/
private Log() {
}

/**
* 功能说明:获取服务实例的静态方法
* 修改说明:
* @author badao
* @date
* @param obj 传入调用此方法的对象
* @return
*/
public synchronized static Log getInst(Object obj) {
if (instance == null) {
instance = new Log();
}
Log.logger = loggerList.get(obj.getClass());
if (Log.logger == null) {
Log.logger = LoggerFactory.getLogger(obj.getClass());
//Log.logger = Logger.getLogger(obj.getClass());
loggerList.put(obj.getClass(), Log.logger);
}
return instance;
}

/**
* 功能说明:获取服务实例的静态方法
* 修改说明:
* @author badao
* @date
* @param clazz 传入调用此方法的类型
* @return
*/
public synchronized static Log getInst(Class clazz) {
if (instance == null) {
instance = new Log();
}
Log.logger = loggerList.get(clazz);
if (Log.logger == null) {
Log.logger = LoggerFactory.getLogger(clazz);
loggerList.put(clazz, Log.logger);
}
return instance;
}

/**
* 功能说明:获取服务实例的静态方法
* 修改说明:
* @author badao
* @date
* @return
*/
public synchronized static Log getInst() {
if (instance == null) {
instance = new Log();
}
Log.logger = loggerList.get(Log.class);
if (Log.logger == null) {
Log.logger = LoggerFactory.getLogger(Log.class);
loggerList.put(Log.class, Log.logger);
}
return instance;
}

public void trace(String message) {
Log.logger.trace(logPrefix + message);
}

public void trace(String message, Throwable t) {
Log.logger.trace(logPrefix + message, t);
}

public void debug(String message) {
Log.logger.debug(logPrefix + message);
}

public void debug(String message, Throwable t) {
Log.logger.debug(logPrefix + message, t);
}

public void info(String message) {
Log.logger.info(logPrefix + message);
}

public void info(String message, Throwable t) {
Log.logger.info(logPrefix + message, t);
}

public void warn(String message) {
Log.logger.warn(logPrefix + message);
}

public void warn(String message, Throwable t) {
Log.logger.warn(logPrefix + message, t);
}

public void error(String message,Object... arguments) {
Log.logger.error(logPrefix + message,arguments);
}

public void error(String message, Throwable t, Object... arguments) {
Log.logger.error(logPrefix + message,t,arguments);
}
}

使用的地方导入包

import com.badao.log.Log;

然后使用

try {

Log.getInst(this).debug("霸道测试成功!");
} catch (Exception e) {
Log.getInst(this).debug("霸道测试错误!"+e.getMessage());
}

 

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