Log4j – Logging in Database

In this article, you will see how to write your logging information into a database.

First create a new Java Project and configure it as Maven Project. For Reference, Click Here

Add the following dependencies in pom.xml

  <dependencies>
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.15</version>
    </dependency>
  </dependencies>  

1. Sql Script

Use the following Sql Script for creating table.

CREATE TABLE logging(loggingdate  DATE, logger VARCHAR(50), logginglevel  VARCHAR(10),
    message VARCHAR(100));

2. Properties file

The following configuration writes your log information in database

log4j.properties

# Define the root logger with appender file
log4j.rootLogger = INFO, DB

# Define the DB appender
log4j.appender.DB=org.apache.log4j.jdbc.JDBCAppender

# Set JDBC Options
log4j.appender.DB.URL=jdbc:mysql://localhost/test
log4j.appender.DB.driver=com.mysql.jdbc.Driver
log4j.appender.DB.user=root
log4j.appender.DB.password=password

# Set the SQL statement to be executed.
log4j.appender.DB.sql=insert into logging values('%d{yyyy-MM-dd  HH:mm:ss.SSS}','%C','%p','%m')

# Define the layout for file appender
log4j.appender.DB.layout=org.apache.log4j.PatternLayout

3. Log4j in Java Program

The following Java class is a very simple example that initializes, and then uses, the Log4J logging library for Java applications.

package com.kruders;

import org.apache.log4j.Logger;

public class HelloWorld {
	static final Logger logger = Logger.getLogger(HelloWorld.class);
	
	public static void main(String[] args) {
		logger.info("Hello World!!!");
	}
}

When you run the above example, you will see the similar logs in database as shown in Figure 2.1

Figure 2.1