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我想用下面的代碼中定義的Hibernate Criteria API運行SELECT查詢。我檢查了控制檯,它似乎是 查詢運行良好。以下是我在控制檯的SQL查詢我越來越:java.lang.ClassCastException:java.lang.Integer不能轉換爲abc.def.myproject.orm.EmployeeTopMetaData
但略低於控制檯上面的SQL,我看到的錯誤:
java.lang.ClassCastException: java.lang.Integer cannot be cast to abc.def.myproject.orm.EmployeeTopMetaData
at abc.def.myproject.orm.dao.impl.EmpDaoImpl.insertEmployeeDetails(EmployeeDaoImpl.java:50)
和線路#50以下按照以下方法行:
(EmployeeTopMetaData) session.createCriteria(EmployeeTopMetaData.class)
以下方法在EmployeeDaoImpl java類中定義。
public boolean insertEmployeeDetails(Employee employee)
{
logger.debug("Starting EmployeeDaoImpl.insert() .....");
Session session = null;
Transaction tx = null;
boolean status = true;
try {
session = sessionFactory.openSession();
tx = session.beginTransaction();
EmployeeTopMetaData empMetaData =
(EmployeeTopMetaData) session.createCriteria(EmployeeTopMetaData.class) // This is the line #50
.setProjection(Projections.property("valueEmpId"))
.add(Restrictions.eq("testingId", 1234))
.add(Restrictions.eq("company_employee_id", 3345))
.uniqueResult();
if (empMetaData == null || empMetaData. getvalueEmpId() < 1) { throw new Exception("Invalid empMetaData"); }
System.out.println("October 04 EmployeeTopMetaData: ");
System.out.println(empMetaData. getvalueEmpId());
// Some more code to go
session.persist(employee);
tx.commit();
} catch(Exception ex) {
tx.rollback();
ex.printStackTrace();
status = false;
} finally {
session.close();
}
logger.debug("Completed EmployeeDaoImpl.insert() .....");
return status;
}
這裏是我的實體類EmployeeTopMetaData.java
:
package abc.def.myproject.orm;
@Entity
@Table(name="EMPLOYEE_TOP_METADATA")
public class EmployeeTopMetaData
{
public int getTestingId() {
return testingId;
}
public void setTestingId(int testingId) {
this.testingId = testingId;
}
public int getCompanyEmpId() {
return company_employee_id;
}
public void setCompanyEmpId(int company_employee_id) {
this.company_employee_id = company_employee_id;
}
public int getvalueEmpId() {
return valueEmpId;
}
public void setvalueEmpId(int valueEmpId) {
this.valueEmpId = valueEmpId;
}
@Id
@Column(name="TESTING_ID")
private int testingId;
@Column(name="COMPANY_EMP_ID")
private int company_employee_id;
@Column(name="VALUE_EMP_ID")
private int valueEmpId;
}
這是您的代碼嗎?你知道'setProjection(Projections.property(「valueEmpId」))'做了什麼嗎? – Tom
閱讀你想要在對象中投入整數的錯誤。 – F0XS
@Tom我已經把這些標準API相關的代碼。如果我理解正確,'setProjection(Projections.property(「valueEmpId」))''等同於'SELECT VALUE_EMP_ID FROM ....'。你在那裏看到錯誤嗎?控制檯中的Hibernate查詢似乎正在產生我正在尋找的東西。 – Dan