Study Java

애노테이션 package servletExam; import javax.servlet.ServletException; import javax.servlet.annotation.WebInitParam; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet( urlPatterns = {"/initParam"}, initParams = { @WebInitParam(name = "id..

JSP 2020. 7. 6. 12:03

CommandHandler : 핸들러 인터페이스 package mvc.command; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public interface CommandHandler { public String process(HttpServletRequest request, HttpServletResponse response) throws ServletException; } NullHandler - 뷰페이지 : viewNullPage.jsp(생략) package mvc.command; import javax.s..

JSP 2020. 7. 5. 23:33

커맨드 핸들러 : CommandHandler package mvc.command; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public interface CommandHandler { public String process(HttpServletRequest request, HttpServletResponse response) throws ServletException; } 커맨들 핸들러 구현체 : BoardListHandler package mvc.command; import javax.servlet.Servle..

JSP 2020. 7. 5. 20:32

package mvc.simple; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet(urlPatterns = "/simple") public class SimpleController extends HttpServlet { @Overr..

JSP 2020. 7. 5. 19:01

DBCPinit package jdbc; import org.apache.commons.dbcp2.*; import org.apache.commons.pool2.impl.GenericObjectPool; import org.apache.commons.pool2.impl.GenericObjectPoolConfig; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import java.sql.DriverManager; import java.sql.SQLException; public class DBCPInit extends HttpServlet { @Override public void init() throws Ser..

JSP 2020. 7. 5. 17:09

의존성 org.apache.commons commons-dbcp2 2.4.0 org.apache.commons commons-pool2 2.5.0 commons-logging commons-logging 1.2 mysql mysql-connector-java 5.1.48 커넥션 풀 설정 : DBCPinit package jdbc; import org.apache.commons.dbcp2.*; import org.apache.commons.pool2.impl.GenericObjectPool; import org.apache.commons.pool2.impl.GenericObjectPoolConfig; import javax.servlet.ServletException; import javax.servlet..

JSP 2020. 7. 5. 16:39

import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter; import java.util.Date; //@WebServlet("/hello") @WebServlet(urlPatterns = "/hello") public class HelloServlet extends HttpServle..

JSP 2020. 7. 5. 16:33

리턴타입 : 재네릭 파라미터 타입 : 기본형 InFunction : public R apply(int value) DoubleFunction: public R apply(double value) LongFunction: public R apply(long value) import java.util.function.IntBinaryOperator; import java.util.function.IntFunction; public class IntFunctionTest { public static void main(String[] args) { IntFunction intFunction = new IntFunction() { @Override public String apply(int value) { ret..

Java 2020. 6. 21. 17:59