In -depth analysis of the 'Logging API' framework in the Java library
In -depth analysis of the 'Logging API' framework in the Java library
Overview:
In software development, logging is an important technology that is used to record events and information that occur during the operation of the application.The logging API framework in the Java class library provides a standard mechanism to process log records.This article will in -depth analysis of the logging API framework in the Java library and provide related programming code and configuration description.
What is the logging API framework:
The Logging API framework implements the standard mechanism of log records on the Java platform.It provides a set of interfaces and classes for recording application events and information.Using the Logging API framework, developers can flexibly control the level, format and goals of the log records.This allows developers to perform detailed log records at all levels of the application, so that it is easy to debug, monitoring and error tracking.
Programming example of using the logging API framework:
Below is a simple Java program example, showing how to use the logging API framework to record the log:
import java.util.logging.Level;
import java.util.logging.Logger;
public class LoggingExample {
private static final Logger LOGGER = Logger.getLogger(LoggingExample.class.getName());
public static void main(String[] args) {
LOGGER.setLevel(Level.INFO);
Logger.info ("This is a record of information."););
Logger.warning ("This is a warning log record.");
Logger.severe ("This is a serious error log record."););
}
}
In the above example, we first created a class called `LoggingExample`.Then, we used the `java.util.logging.logger` class to create a log recorder called` logger`.The name of this log recorder is the name of our `loggingExample` class.
In the `Main` method, we first use the` Setlevel` method to set the logging level to `level.info`, which means that we only want to record important information and higher -level logs.We then record several log information using different log record levels (Info, Warning and Severe.
When running the above example code, the log message will be sent to the default log processing program and displayed on the console.You can configure other log processing programs and logging levels as needed to customize logging.
Configuration of log records:
The Logging API framework provides a lot of configuration options to record and process log information according to specific needs.Here are some common configuration options:
1. Logging level (the importance of log): It can be set to Finest, Finer, Fine, Info, Warning, Severe and other levels.
2. Log processing program (determine how to deal with and output logs): You can choose to output the logs to the console, files, databases and other goals.
3. Log format (the arrangement of log messages): You can define custom formats, such as timestamps, log levels, class names, etc.
4. Log filter (filtering and filtering log according to conditions): You can filter the log according to the level of logs, sources and other information.
These configuration options can be set in the configuration file of the Java application, such as `logging.properties`.In addition, dynamic configuration can be performed by programming.
Summarize:
The Logging API framework in the Java class library is a powerful and flexible tool for logging in the application.This article provides in -depth analysis of the logging API framework, and gives a simple example code to show how to use the framework to record the log.In addition, this article also introduces the common configuration options of the Logging API framework to help developers customize the logging according to specific needs.
