Hibernate不承认持久的getter / setter属性

Question

I have this propery in my entity class:

@Column(name="avatar",nullable=false,length=1000)
String getAvatarData() {
    return new JSONObject(avatar.export()).toString();
}
void setAvatarData(String data) {
    avatar = Avatar.restore(new JSONObject(data).toMap());
}

Hibernate doesn't handle it at all. At least, it's not included in the schema it generates.

Answer 1

@Access(AccessType.PROPERTY)

on your entity. That's JPA 2.0. For 1.0, use org.hibernate.AccessType :

@AccessType("property")

By the way, I would rather have a simple field with getters and setters, and annotate the field instead. Then, if you want custom transformations, add other methods, like getFooAsJSON

Answer 2

To clarify Bozho's answer: in JPA 2.0 (Hibernate 3.5 and above) you declare a single field with property access as following:

@Access(AccessType.FIELD)
public class Foo {
    ...
    @Access(AccessType.PROPERTY)
    @Column(name="avatar",nullable=false,length=1000) 
    String getAvatarData() { ... }

    void setAvatarData(String data) { ... }
}

in previous versions of Hibernate - as following (note that annotations are still placed on the field):

@Access("field")
public class Foo {
    ...
    @Access("property")
    @Column(name="avatar",nullable=false,length=1000) 
    private Avatar avatarData;

    String getAvatarData() { ... }
    void setAvatarData(String data) { ... } 
    ...
}