Log to a database using log4j

Question

Since in log4j javadoc is

WARNING: This version of JDBCAppender is very likely to be completely replaced in the future. Moreoever, it does not log exc

Answer 1

    **log4j.properties file**

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

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

    # Set JDBC URL
    log4j.appender.DB.URL=jdbc:mysql://localhost/log

    # Set Database Driver
    log4j.appender.DB.driver=com.mysql.jdbc.Driver

    # Set database user name and password
    log4j.appender.DB.user=root
    log4j.appender.DB.password=root

    # Set the SQL statement to be executed.
    log4j.appender.DB.sql=INSERT INTO actionlg(user_id, dated, logger, level, message) values('%X{userId}',' %d{yyyy-MM-dd-HH-mm}','%C','%p','%m')

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

  **Java Class**  
    Log4jExamples.java
    import java.sql.*;
    import java.io.*;

    import org.apache.log4j.Logger;
    import org.apache.log4j.MDC;


    public class Log4jExample {
           /* Get actual class name to be printed on */
           static Logger log = Logger.getLogger(Log4jExample.class.getName());
           public static void main(String[] args)throws IOException,SQLException{
              log.error("Error");
              MDC.put("userId", "1234");
           }
    }

    **libs required**
     - mysql-connector-java-3.1.8-bin.jar 
     - log4j-1.2.17.jar