java Java 中的 Logger getFilter()方法，示例

Java 中的 Logger getFilter()方法，示例

原文:https://www . geesforgeks . org/logger-getfilter-method-in-Java-with-examples/

记录器类的 getFilter() 方法用于获取该记录器实例的当前过滤器。过滤器对于过滤掉日志消息很有用。我们可以说过滤器决定消息是否被记录。过滤器由 Java 接口表示

语法:

public Filter getFilter()

参数:此方法接受不接受任何参数。

返回值:该方法返回该记录器的当前过滤器。

下面的程序说明了 getFilter()方法: 程序 1:

// Java program to demonstrate
// Logger.getFilter() method

import java.util.logging.*;
import java.io.IOException;

public class GFG {

    public static void main(String[] args)
        throws SecurityException, IOException
    {

        // create a logger
        Logger logger = Logger.getLogger("com.core");

        // set a new filter
        logger.setFilter(new Filter() {
            @Override
            public boolean isLoggable(LogRecord record)
            {
                return true;
            }
        });

        // get Filter
        Filter filter = logger.getFilter();

        // check filter is null or not by printing
        System.out.println("Filter = " + filter);
    }
}

输出: eclipse IDE 上打印的输出如下所示-

程序 2:

// Java program to demonstrate
// Logger.getFilter() method

import java.util.logging.*;
import java.io.IOException;

public class GFG {

    public static void main(String[] args)
        throws SecurityException, IOException
    {

        // create a logger
        Logger logger
            = Logger.getLogger("com.javacode.core");

        // set a new filter
        logger.setFilter(new MyFilter());

        // get Filter
        Filter filter = logger.getFilter();

        // check filter is null or not by printing
        System.out.println("Filter = " + filter);
    }
}
class MyFilter implements Filter {
    public boolean isLoggable(LogRecord record)
    {
        return false;
    }
}