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add folder
/hhwProject/src/main/webapp/lib

add jstl, jdbc jar file

/hhwProject/src/main/java/com/ict/hhw/member/controller/MemberController.java 

public void send_mail(Member member, String subject, String message)
fill in your actual email address, email password of naver 

• Operating System : Microsoft Window 10
• IDE : Spring Tool Suite 3 (3.9.13.RELEASE)
• Web Application Server : Apache Tomcat 8.5
• Database : Oracle 11g Express Edition
• Framework & Open API : Spring, MyBatis, Ajax, jQuery
• Version Manage System : Git