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雖然這個問題問了很多次，我已經使用了所有的建議，但我仍然得到這個錯誤。org.hibernate.MappingException：無法確定類型：java.util.Set
的User.java是
@Entity
@Table(name = "USER")
public class User implements UserDetails, Serializable {
private static final long serialVersionUID = 2L;
@Id
@Column(name = "USER_ID")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@Column(name = "USERNAME")
private String username;
@Column(name = "PASSWORD")
private String password;
@Column(name = "NAME")
private String name;
@Column(name = "EMAIL")
private String email;
@Column(name = "LOCKED")
private boolean locked;
@OneToMany(cascade=CascadeType.ALL, fetch = FetchType.EAGER)
@ElementCollection(targetClass=Role.class)
@Column(name = "ROLE_ID")
private Set<Role> roles;
@Override
public GrantedAuthority[] getAuthorities() {
List<GrantedAuthorityImpl> list = new ArrayList<GrantedAuthorityImpl>(0);
for (Role role : roles) {
list.add(new GrantedAuthorityImpl(role.getRole()));
}
return (GrantedAuthority[]) list.toArray(new GrantedAuthority[list.size()]);
}
@Override
public boolean isAccountNonExpired() {
return true;
}
@Override
public boolean isAccountNonLocked() {
return !isLocked();
}
@Override
public boolean isCredentialsNonExpired() {
return true;
}
@Override
public boolean isEnabled() {
return true;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public boolean isLocked() {
return locked;
}
public void setLocked(boolean locked) {
this.locked = locked;
}
@Override
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
@Override
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public void setRoles(Set<Role> roles) {
this.roles = roles;
}
public Set<Role> getRoles() {
return roles;
}
}
而且Role.java是
@Entity
@Table(name="ROLE")
public class Role implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name="ROLE_ID")
private long id;
@Column(name="USERNAME")
private String username;
@Column(name="ROLE")
private String role;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
}
這是我在使用JPA休眠註釋第一次嘗試。所以任何建議都會非常有幫助。
對於冬眠的pom.xml的依賴關係是：
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate</artifactId>
<version>3.5.4-Final</version>
<type>pom</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.5.4-Final</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.5.4-Final</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>3.1.0.GA</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>3.5.4-Final</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
我不知道故障的線索。
謝謝。
你必須在這種情況下，因爲角色是一個實體只能使用@ManyToOne與@JoinColumn。您可以使用@ElementCollection和@Column只有當集合包含基本類型（整數，字符串，日期，ECT）或嵌入類型。如果需要，請參閱JPA 2.0規範中的示例。您將註釋從未結合使用，這可能是問題的根源。 – 2011-05-29 13:37:22