deveoping實體類使用JPA

Question

嗨，我正在開發使用（JPA）的一個對象用戶的持久層，我在編輯器中編寫代碼，而不是使用春季休眠任何東西，我寫了下面的代碼，但它顯示包javax.persistence 。*;沒有找到我如何使這個工作可以任何人幫助。

這是我寫的類。

//import javax.persistence.*; 
import java.io.Serializable; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.NamedQueries; 
import javax.persistence.NamedQuery; 

@Entity(name = "USER") //Name of the entity 

public class User implements Serializable 
{ 
    private int userId; 
    private String userName; 
    private String password; 
    private String firstName; 
    private String lastName; 
    private String roles; 

    @Id 
    @Column(name = "USER_ID", nullable = false)  
    public int getUserId() 
    { 
     return userId; 
    } 

    public void setUserId(int UserId) 
    { 
     this.userId = userId; 
    } 

    @Column(name = "USER_NAME", nullable = false) 
    public String getUserName() 
    { 
     return userName; 
    } 

    public void setUserName(int userName) 
    { 
     this.userName = userName; 
    } 

    @Column(name = "PASSWORD", nullable = false) 
    public String getPassword() 
    { 
     return password; 
    } 

    public void setPassword(int password) 
    { 
     this.password = password; 
    } 

    @Column(name = "FIRST_NAME", nullable = false) 
    public String getFirstName() 
    { 
     return firstName; 
    } 

    public void setFirstName(int firstName) 
    { 
     this.firstName = firstName; 
    } 

    @Column(name = "LAST_NAME", nullable = false) 
    public String getLastName() 
    { 
     return lastName; 
    } 

    public void setLastName(int lastName) 
    { 
     this.lastName = lastName; 
    } 

    @Column(name = "ROLES", nullable = false) 
    public String getRoles() 
    { 
     return roles; 
    } 

    public void setRoles(int roles) 
    { 
     this.roles = roles; 
    } 

    public User() 
    { 
    } 

} 

Answer 1

添加persistence api到您的構建路徑

Answer 2

您必須設置persistence.jar classpath中。