JPA 复合主键源码案例

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@Entity

@Table(name = "RELEASE_INFO_ELEMENT")

public class ReleaseInfoElement {

 @EmbeddedId

 private PK pk = new PK();

 @Column(name = "VALUE")

 private String value;

 public Long getInfoId() {

  return pk.infoId;

 }

 public void setInfoId(Long infoId) {

  pk.infoId = infoId;

 }

 public Long getParamId() {

  return pk.paramId;

 }

 @Override

 public String toString() {

  return "ReleaseInfoElement [infoId=" + pk.infoId + ", paramId=" + pk.paramId

    + ", value=" + value + "]";

 }

 public void setParamId(Long paramId) {

  pk.paramId = paramId;

 }

 public String getValue() {

  return value;

 }

 public void setValue(String value) {

  this.value = value;

 }

 @Embeddable

 public static class PK implements Serializable {

  @Column(name = "INFO_ID")

  private Long infoId;

  @Column(name = "PARAM_ID")

  private Long paramId;

  public PK() {

   super();

  }

 }

}