1. Download Oracle SQL Developer Third-party database driver on Oracle website
Download page: http://www.oracle.com/technetwork/developer-tools/sql-developer/thirdparty-095608.html
Download the MySQL Drivers from the MySQL Site. There is drivers here:
1) MySQL connector/j 5.0
Unzip the zip file and take the Mysql-connector-java-5.0.4-bin.jar as your Driver.jar
Download link http://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.0.4.zip/from/http:/mysql.he.net/
2) MySQL connector/j 3.1
Unzip the zip file and take the Mysql-connector-java-3.1.14-bin.jar as your Driver.jar
Download Link: http://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-3.1.14.zip/from/http:/mysql.he.net/
2. Extract the file Mysql-connector-java-5.0.4-bin.jar
3. Open Oracle SQL Developer, select Tools > Preferences > Database > Third Party JDBC Drivers, add mysql-connector-java-5. 0.4-bin.jar, click OK.
4. At Oracle SQL developer Point, add a connection to see the MySQL option and fill in the necessary information to use.
Oracle SQL Developer Connection MySQL