java使用条件中的Select和where语句

Question

我正在Web应用程序中用hibernate替换jdbc。我已经了解到，我不必在这种情况下编写任何SQL查询。相反，条件查询可以帮助我。 这些是我的SQL查询，我想使用条件而不是HQL将其转换为hibernate

String getOrgIdQuery = "SELECT * FROM USER_DETAILS WHERE USER_ID= ?";
rsDeptName = stmt.executeQuery("SELECT DEPARTMENT_NAME FROM DEPARTMENT WHERE DEPARTMENT_ID ="+ DeptID + ";");
String insertCreateCdcValuesFirst = ("UPDATE User_Details SET User_Name=?, Organization_ID=?, Department_ID=?, Access_Ctrl = ?, User_Role=? WHERE User_ID = ?;");

Answer 1

首先，您必须使用POJOS映射表

String getOrgIdQuery = "SELECT * FROM USER_DETAILS WHERE USER_ID= ?";

Hibernate中前面的代码如下所示

Criteria criteria = session.createCriteria(USER_DETAILS.class);
criteria.add(Restrictions.eq("user_id",yourUserId));
List<USER_DETAILS> list = criteria.list();

您的第二个select查询也与前面相同

String insertCreateCdcValuesFirst = ("UPDATE User_Details SET User_Name=?, Organization_ID=?, Department_ID=?, Access_Ctrl = ?, User_Role=? WHERE User_ID = ?;");

使用Hibernate Criteria更新如下所示：

USER_DETAILS user_details = (USER_DETAILES) session.get(USER_DETAILS.class,yourUserId);
user_details.setUser_Name(NewUserName);
user_details.setOrganization_Id(newOrganizationId);
// some other fields update goes here
session.update(user_details);
tx.commit();

我希望这对你有帮助