log4j:当我从另一个班级调用记录器时，日志中显示的班级名称不正确 [英] log4j: Class name showing in log is not correct when I call the logger from another class

问题描述

基本上，当使用log4j时，我知道我们必须使用Logger.getLogger(MyClass.class)或Logger.getLogger("MyClass")来启动Logger.

Basically, when using log4j, I know we have to initiate a Logger by using Logger.getLogger(MyClass.class) or Logger.getLogger("MyClass").

我的课程太多了，我不想在每个课程中都添加此语句.相反，我想做的就是这个

I have too many classes and I dont want to add this statement in every class. Rather, what I woudl like to do is this

Logger.info(this,"My message");

其中Logger是我编写的类(不是log4j中的类)，该类又会初始化Logger类型的对象(org.apache.log4j.Logger)并继续执行消息.

Where Logger is a class I have written (not the one in log4j) which in turn initiates an object of type Logger (org.apache.log4j.Logger) and carries on with the message.

这是我的Logger.java

This is my Logger.java

package com.mypackage;

/**
 * @author Sriram Sridharan
 *Custom logging implementation using log4j
 */
public class Logger {
private static org.apache.log4j.Logger logger;

    /**
     * Writes an INFO log
     * @param oClass
     * @param message
     */
    public static void INFO(Object oClass, String message){

org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger(oClass.getClass());
    logger.info(message);
}
}

现在，我有我自己的类，该类调用此Logger实现来记录事件.看起来像这样

Now, I have my own class, that calls this Logger implementation to log events. it looks like this

public class MyClass {

    public void myMethod(){
        com.mypackage.Logger.INFO(this, "Hello, World");
    }
}

我的日志没有问题.他们很好.但是，日志中显示的类名称是相同的(日志记录器).这是输出

I don't have a problem with the logs. They're fine. However, the Class name displayed in the logs is the same (Logger). This is the output

 INFO [main] (Logger.java:18) - Hello, World

我希望如此

 INFO [main] (MyClass.java:18) - Hello, World

我要去哪里错了?

推荐答案

使用%c模式输出类别/getLogger("myCategory")/而不是输出打印呼叫者类的%C.

Use %c pattern to output category /getLogger("myCategory")/ instead of %C that prints caller class.

想法是您拥有通用方法:

The idea is that you have generic method:

public static void debug(String category, String message) {
    Logger logger = org.apache.log4j.Logger.getLogger(category);
    logger.debug(message);
}

，您的log4j配置包含您的模式:

and your log4j configuration contains your pattern:

%d{ISO8601} %c %m %n

这将打印

2014-02-21 14:38:120 YourCategory Your Message

因此，您无需为每个带有日志的类弄乱Logger的实例化.

So you do not need to mess up with instatiation of Logger for each class with log.

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