form 태그 이용한 파라미터 전송

JAVA/Web

form 태그 이용한 파라미터 전송

lavender1122 2024. 3. 11. 01:06

예제 1

데이터 저장

//MemberDTO class에 정보 저장
	MemberDTO m1 = new MemberDTO();
	m1.setId("aa1"); m1.setPw("bb1"); m1.setAddr("cc1");m1.setTel("dd1"); 
	MemberDTO m2 = new MemberDTO();
	m2.setId("aa2"); m2.setPw("bb2");m2.setAddr("cc2");m2.setTel("dd2"); 
	MemberDTO m3 = new MemberDTO();
	m3.setId("aa3"); m3.setPw("bb3");m3.setAddr("cc3");m3.setTel("dd3"); 
	List<MemberDTO> list = new ArrayList<>();

Collections 이용해서 list add

//List 객체 생성
List<MemberDTO> list = new ArrayList<>();
Collections.addAll(list, m1,m2,m3);

request 객체/ for문

String id = request.getParameter("id"); // id(key) 이용해서 value가져옴
	MemberDTO findMember = null;
	for(MemberDTO member:list){
		if(member.getId().equals(id)){ //member에 있는 Id랑 id 같으면 출력
			findMember = member;
			break; // 발견하면 빠져나가는 문구
		}
	}

원본

class MemberDTO//경로:src.kr.co.seoulit.MemberDTO.java

package kr.co.seoulit;

public class MemberDTO {
	private String id,pw,addr,tel;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getPw() {
		return pw;
	}

	public void setPw(String pw) {
		this.pw = pw;
	}

	public String getAddr() {
		return addr;
	}

	public void setAddr(String addr) {
		this.addr = addr;
	}

	public String getTel() {
		return tel;
	}

	public void setTel(String tel) {
		this.tel = tel;
	}
}

t9.jsp //경로 :WebContent.t9.jsp

<%@page import="org.apache.jasper.tagplugins.jstl.core.ForEach"%>
<%@page import="java.util.Collections"%>
<%@page import="java.util.stream.Collectors"%>
<%@page import="java.util.ArrayList"%>
<%@page import="java.util.List"%>
<%@page import="kr.co.seoulit.MemberDTO"%>
<%@page import="java.util.Map"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<% 
	MemberDTO m1 = new MemberDTO();
	m1.setId("aa1"); m1.setPw("bb1"); m1.setAddr("cc1");m1.setTel("dd1"); 
	MemberDTO m2 = new MemberDTO();
	m2.setId("aa2"); m2.setPw("bb2");m2.setAddr("cc2");m2.setTel("dd2"); 
	MemberDTO m3 = new MemberDTO();
	m3.setId("aa3"); m3.setPw("bb3");m3.setAddr("cc3");m3.setTel("dd3"); 
	List<MemberDTO> list = new ArrayList<>();
	
	Collections.addAll(list, m1,m2,m3);
	String id = request.getParameter("id"); // id(key) 이용해서 value가져옴
	MemberDTO findMember = null;
	for(MemberDTO member:list){
		if(member.getId().equals(id)){ //member에 있는 Id랑 id 같으면 출력
			findMember = member;
			break; // 발견하면 빠져나가는 문구
		}
	}
		
	%>
	<h1>회원상세정보보기</h1>
	ID: <input type="text" value="<%= findMember.getId() %>" > <br/> 
	PW: <input type="text" value="<%= findMember.getPw() %>"> <br/> 
	ADDR: <input type="text" value="<%= findMember.getAddr() %>"> <br/> 
	TEL: <input type="text"value="<%= findMember.getTel() %>"> <br/> 
</body>
</html>

예제2) select 이용

원본

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>회원목록</h1>
<select id = "sel">
<option>aa1</option>
<option>aa2</option>
<option>aa3</option>
</select>
<script>
document.querySelector("#sel").value="<%=request.getParameter("id") %>";
</script>
</body>
</html>

예제3)

t13.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href = "t14.jsp?id=<%=request.getParameter("id") %>">문서t14.jsp로 이동</a>
</body>
</html>

t.14.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<!-- t13.jsp 보낸 id 가져옴 -->
<%= request.getParameter("id") %>
</body>
</html>