"richie-lea" wrote : There is a java.lang.ClassCastException:
ejb.persistence.User.
|
| My servlet code is:
| private void showUser(HttpServletRequest request,
| | HttpServletResponse response) {
| | try {
| | InitialContext ctx = new InitialContext();
| | userSession = (userSession)
ctx.lookup("userSessionBean/local");
| | } catch (Exception e) {
| | e.printStackTrace();
| | }
| |
| | Collection<User> auser = userSession.getUsers();
| | if (auser != null)
| | for (User user : auser) {
| | System.out.println("User name : " +
user.getName());
| | System.out.println("User id : " +
user.getId());
| | System.out.println("User mgs : " +
user.getMessage());
| | }
| | }
| userSessionBean/local getUsers method code is:
|
| | public Collection<User> getUsers() {
| | // TODO Auto-generated method stub
| | return em.createQuery("from User u").getResultList();
| | }
|
| My ejb.persistence.User class is:
|
| | package ejb.persistence;
| |
| | import javax.persistence.*;
| |
| | @Entity
| | @Table(name = "user")
| | public class User {
| | private String name;
| |
| | private int id;
| |
| | private String message;
| |
| | public User() { }
| |
| | public User(String name, String message) {
| | this.name = name;
| | this.message = message;
| | }
| |
| | @Id
| | @GeneratedValue
| | public int getId() {
| | return id;
| | }
| |
| | public void setId(int id) {
| | this.id = id;
| | }
| |
| | public String getMessage() {
| | return message;
| | }
| |
| | public void setMessage(String message) {
| | this.message = message;
| | }
| |
| | public String getName() {
| | return name;
| | }
| |
| | public void setName(String name) {
| | this.name = name;
| | }
| | }
|
| Log msg:
|
| | 06:43:44,937 ERROR [[ejb_servlet]] Servlet.service() for servlet
ejb_servlet threw exception
| | java.lang.ClassCastException: ejb.persistence.User
| | at servlet.ejb_servlet.showUser(ejb_servlet.java:51)
| | at servlet.ejb_servlet.doGet(ejb_servlet.java:87)
| | at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
| | .....
| |
| Sorry for the long post, hope you're still with me. My questions is:
| Why did the ClassCastException occured? What's wrong?
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http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3933885#3933885
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http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3933885
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