视图类:

import javax.persistence.Entity;import javax.persistence.Id;import javax.persistence.IdClass;@Entity@IdClass(VW_App_key.class)public class VW_App_Lab_Aux_Vwbasic {	private Integer ap_id;	private Integer ap_c_id;	private String Project2;	private String Au_SickMark;	@Id	public Integer getAp_id() {		return ap_id;	}	public void setAp_id(Integer apId) {		ap_id = apId;	}	public Integer getAp_c_id() {		return ap_c_id;	}	public void setAp_c_id(Integer apCId) {		ap_c_id = apCId;	}	@Id	public String getProject2() {		return Project2;	}	public void setProject2(String project2) {		Project2 = project2;	}	public String getAu_SickMark() {		return Au_SickMark;	}	public void setAu_SickMark(String auSickMark) {		Au_SickMark = auSickMark;	}		}

　联合主键类：

import java.io.Serializable;import javax.persistence.Embeddable;@Embeddable  public class VW_App_key implements Serializable{//联合主键（VW_App_Lab_Aux_Vwbasic）    private static final long serialVersionUID = -3304319243957837925L;      private Integer ap_id;    private String Project2;    public Integer getAp_id() {		return ap_id;	}	public void setAp_id(Integer apId) {		ap_id = apId;	}	public String getProject2() {		return Project2;	}	public void setProject2(String project2) {		Project2 = project2;	}	@Override      public boolean equals(Object o) {          if(o instanceof VW_App_Lab_Aux_Vwbasic){              VW_App_Lab_Aux_Vwbasic key = (VW_App_Lab_Aux_Vwbasic)o ;              if(this.ap_id == key.getAp_id() && this.Project2.equals(key.getProject2())){                  return true ;              }          }          return false ;      }            @Override      public int hashCode() {          return this.Project2.hashCode();      }}