2010. 7. 6. 21:48 JAVA , JSP
el 표현식
package el.domain;
public class User {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
<%@ page language="java" contentType="text/html; charset=EUC-KR"
pageEncoding="EUC-KR"%>
<%@ page import="el.domain.*" %>
<%@ page import="java.util.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
<%
//User 객체 생성
User user = new User();
user.setName("홍길동");
request.setAttribute("user", user);
%>
User' name : ${requestScope.user.name } <br />
User' name : ${user.name } <br />
<%
//세션의 정보를 저장
String[] list = {"ko", "jp", "uk", "us"};
session.setAttribute("list", list);
Map map = new HashMap();
map.put("kim", "김");
map.put("lee", "이");
session.setAttribute("map", map);
%>
<a href="el02.jsp">배열이나 컬렉션을 사용한 EL</a>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=EUC-KR"
pageEncoding="EUC-KR"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
<ul>
<li>국가코드 : ${list[0] }</li>
<li>국가코드 : ${list[1] }</li>
<li>국가코드 : ${list["1"] }</li>
<li>성 : ${map["kim"] }</li>
<li>성 : ${map.lee }</li>
<li>성 : ${map["kim"] }</li>
<li>성 : ${map[kim] }</li>
</ul>
</body>
</html>
package el;
public class Toy {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
package el;
public class Dog {
private Toy[] toys;
private String name;
public Toy[] getToys() {
return toys;
}
public void setToys(Toy[] toys) {
this.toys = toys;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
package el;
public class Person {
private String name;
private Dog dog;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Dog getDog() {
return dog;
}
public void setDog(Dog dog) {
this.dog = dog;
}
}
package el;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ELExam01 extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
// 홍길동, 순둥이, 토마스, 뽀로로 객체들을 만들어서
// request 객체에 담는다
// 그리고는 elExam01.jsp로 포워딩
Toy t1 = new Toy();
t1.setName("뽀로로");
Toy t2 = new Toy();
t2.setName("토마스");
Dog d = new Dog();
d.setToys(new Toy[]{t1, t2});
d.setName("순둥이");
Person p = new Person();
p.setDog(d);
p.setName("홍길동");
request.setAttribute("p", p);
// forwarding
request.getRequestDispatcher("elExam01.jsp").forward(request, response);
//일단 ServletContext가 필요하다
//ServletContext sc = this.getServletContext();
//포워딩 하는 객체가 필요
// 이때 절대 주소이다
//RequestDispatcher rd = sc.getRequestDispatcher("/elExam01.jsp");
//포워딩
//rd.forward(request, response);
}
}
<%@ page language="java" contentType="text/html; charset=EUC-KR"
pageEncoding="EUC-KR"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
${p.name }의 개${p.dog.name }의 장난감은 ${p.dog.toys[0].name }, ${p.dog.toys[1].name }입니다.
</body>
</html>
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