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JSP/이론

setproperty(*) - *(와일드카드)

by SEOKIHOUSE 2023. 6. 14.

setproperty를 *를 안쓰고 쓴다면

property이름은 객체의 변수이름을 가져와서 쓰는데 param은 form에 있는 number의 name을 쓴다

근데 *로 가져오면 form에 있는 name을 객체의 변수이름이랑 똑같이 맞춰야한다

안맞추니 null나옴

맞추면 짱구가 나온다~

<%@ 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>
	<form action="0614formgettersetter.jsp" method="post">
		번호<input type="text" name="mno" value="1"><br>
		이름<input type="text" name="name" value="짱구"><br>
		아이디<input type="text" name="id" value="zzang"><br>
		비번<input type="text" name="pw" value="1234"><br>
		폰번<input type="text" name="phone" value="010-1111-1111"><br>
		<input type="submit" value="제출">
	</form>
</body>
</html>
<%@ 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>
	<%
		
		request.setCharacterEncoding("utf-8");
		
	%>
	
	<jsp:useBean id="mb" class="vo.Member"></jsp:useBean>
	<%-- 
	<jsp:setProperty property="mno" name="mb" param="mno"/>
	<jsp:setProperty property="name" name="mb" param="names"/>
	<jsp:setProperty property="id" name="mb" param="id"/>
	<jsp:setProperty property="pw" name="mb" param="pw"/>
	<jsp:setProperty property="phone" name="mb" param="phone"/>
	 --%>
	
	<jsp:setProperty property="*" name="mb"/>
	
	<h1>받은 데이터</h1>
	
	<jsp:getProperty property="mno" name="mb"/>
	<jsp:getProperty property="name" name="mb"/>
	<jsp:getProperty property="id" name="mb"/>
	<jsp:getProperty property="pw" name="mb"/>
	<jsp:getProperty property="phone" name="mb"/>
</body>
</html>
package vo;

public class Member {
	private int mno;
	private String name;
	private String id;
	private String pw;
	private String phone;
	
	
	public Member() {}
	
	public void setMno(int mno) {
		this.mno = mno;
	}
	public int getMno() {
		return mno;
	}
	
	public void setName(String name) {
		this.name = name;
	}
	public String getName() {
		return name;
	}
	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 getPhone() {
		return phone;
	}

	public void setPhone(String phone) {
		this.phone = phone;
	}
	
	
	
}
  • forward로 넘겨버리기

request로 넘겨주면 setattribute한 것과 같이 되나보다..

그래서 getattribute로 받는데 이거는 bean을 set해준것과

같은 느낌이라 받을 때 bean으로 받아야하더라.. 첨에 오류남(prodname으로 적었다);;;;;;;;;;

1
2

prodname로 하니까 오류난다

3

 

 bean으로 바꺼줌

 

스무스~

<%@ 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>
	<form action="0614itemBeangettersetter.jsp" method="post">
		제품명 <input type="text" name="prodname" value="트랜스포머"><br>
		가격 <input type="text" name="price" value="100000"><br>
		설명 <input type="text" name="desc" value="옵티머스 프라임이 될 기회"><br>
		<input type="submit" value="제출">
	</form>
</body>
</html>
<%@ 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>
	<%
		request.setCharacterEncoding("utf-8");
	%>
	<jsp:useBean id="bean" class="vo.ItemBean" scope="request"></jsp:useBean>
	<jsp:setProperty property="*" name="bean"/>
	<jsp:forward page="0614action_result.jsp"></jsp:forward>
	<h1>받아온 값</h1>
	<%--
	제품명: <jsp:getProperty property="prodname" name="bean"/><br>
	가격: <jsp:getProperty property="price" name="bean"/><br>
	설명:<jsp:getProperty property="desc" name="bean"/><br>
	 --%>
</body>
</html>
package vo;

public class ItemBean {
	private String prodname;
	private int price;
	private String desc;
	
	public ItemBean() {}
	
	public String getProdname() {
		return prodname;
	}

	public void setProdname(String prodname) {
		this.prodname = prodname;
	}

	public int getPrice() {
		return price;
	}

	public void setPrice(int price) {
		this.price = price;
	}

	public String getDesc() {
		return desc;
	}

	public void setDesc(String desc) {
		this.desc = desc;
	}

	
	
}
<%@page import="vo.ItemBean"%>
<%@ 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>
	<%
		ItemBean ib = (ItemBean)request.getAttribute("bean");
	%>
	이름: <%=ib.getProdname() %>
	가격: ${bean.getPrice() }
	설명: <%=ib.getDesc() %>
</body>
</html>

 

 

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