在方法上添加注释会强制JPA通过方法访问属性。当对象的内部状态与数据库模式不同时，这才有意义：
@Entitypublic class Employee { private String firstName; private String lastName; @Column(name = "EMP_NAME") // Due to legacy database schema public String getName() { return fisrtName + " " + lastName; } public void setName(String name) { ... } ... Getters and setters for firstName and lastName with @Transient ...}在JPA 2.0中，您可以使用以下命令在细粒度级别上指定访问类型
@Access：
@Entity @Access(AccessType.FIELD)public class Employee { @Access(AccessType.PROPERTY) @Column(name = "EMP_NAME") public String getName() { ... } ... other properties have field access ...}
