我在会话中放了一个对象： session.setAttribute("userDTO", currentUser); 我试图用EL显示它.我已成功使用scriplets(证明对象在会话中设置正常). JSP中的代码： body % UserDTO userdto=(UserDTO)session.getAttr
session.setAttribute("userDTO", currentUser);
我试图用EL显示它.我已成功使用scriplets(证明对象在会话中设置正常).
JSP中的代码：
<body>
<% UserDTO userdto=(UserDTO)session.getAttribute("userDTO"); %>
<%=userdto.getUsername() %>
Username from session:<c:out value="${sessionScope.userDTO.username }"/>
</body>
scriplets显示用户名,但在“会话的用户名：”后没有显示任何内容.为什么？
UserDTO类：
public class UserDTO {
private int ID;
private String email;
private boolean emailConfirmed;
private String username;
private String role;
public int getID() {
return ID;
}
public void setID(int iD) {
ID = iD;
}
public boolean isEmailConfirmed() {
return emailConfirmed;
}
public void setEmailConfirmed(boolean emailConfirmed) {
this.emailConfirmed = emailConfirmed;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}
第1步：将jstl-x.x.jar放在lib文件夹中或将依赖项放在maven中.
第2步：在jsp文件中
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
...
<body>
<% UserDTO userdto=(UserDTO)session.getAttribute("userDTO"); %>
<%=userdto.getUsername() %>
Username from session:<c:out value="${sessionScope.userDTO.username }"/>
...
</body>