JPA复合主键源码案例:http://note.youdao.com/share/id=9065b839f2d6b3f1b6310ad9bb92d3f6type=note @Entity@Table(name = RELEASE_INFO_ELEMENT)public class ReleaseInfoElement { @EmbeddedId private PK pk = new PK(); @Column(name = VALUE) private String value; public