IT 공부/JSP
JavaBean 1
toraa
2022. 7. 29. 15:15
JavaBean
. 자바클래스를 하나의 컴포넌트화 하여 사용
. useBean : 자바빈즈의 생성된 객체를 사용하기 위한 액션태그
. setProperty : 자바빈즈의 필드값을 설정하기 위한 액션태그
- id : 페이지 내의 자바빈즈를 구별하기 위한 식별자
- class : 페이지에서 사용하려는 자바빈즈
- scope : 자바빈즈 객체의 유효범위 (사용범위)
jsp1.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>
<form action="jsp2.jsp" method="post" enctype="application/x-www-form-urlencoded">
서버로 전송할 값: <input type="text" name="msg"><br><br>
<input type="submit" value="전송">
<input type="reset" value="취소">
</form>
</body>
</html>Echo.java
source - generate getter & setter
package myecho;
public class Echo {
private String msg = "";
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}jsp2
<%@ 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>
<%
request.setCharacterEncoding("utf-8");
%>
<body>
<jsp:useBean id="me" class="myecho.Echo" scope="page"></jsp:useBean>
<jsp:setProperty property="msg" name="me"/>
<% out.print("Echo클래스의 msg: "+me.getMsg()+"<br>"); %>
</body>
</html>Library.java
package myecho;
public class Library {
private String title;
private String name;
private String content;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
}jsp3.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="jsp4.jsp" method="get">
제 목 : <input type="text" name="title" required><p>
이 름 : <input type="text" name="name" required><p>
내 용 : <input type="text" name="content" required><br><br>
<input type="submit" value="등록">
</form>
</body>
</html>jsp4.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>
<jsp:useBean id="book" class="myecho.Library" scope="request"></jsp:useBean>
<jsp:setProperty property="title" name="book"/>
<jsp:setProperty property="name" name="book"/>
<jsp:setProperty property="content" name="book"/>
<jsp:forward page="jsp5.jsp"></jsp:forward>
</body>
</html>jsp5.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>
<jsp:useBean id="book" class="myecho.Library" scope="request"></jsp:useBean>
<h2>도서관리</h2>
제 목 : <jsp:getProperty property="title" name="book"/><br>
작 자 : <jsp:getProperty property="name" name="book"/><br>
내 용 : <jsp:getProperty property="content" name="book"/>
</body>
</html>