hibernate-mapping

问题 My table has column as char(5) and can not change it to varchar(5). So when I fetch values out from the table using hibernateTemplate , that returns added spaces with actual say single alphabet value.(A custome fix is to use .trim() method with checking NPE) but do we have a provided approach to handle this kind of situation. PS.I am using Spring support for hibernate dao support. (In SQL, the CHAR data type is a fixed length character string. By definition, the additional characters are

问题 I have a SQL stored procedure that gives the menu which is assigned to each user, based on 'ID' and 'Code'. My application runs on Angular and uses Drools and Hibernate files to get all the data to populate the app. On that moment i just want to list all the menu based on id and code, but i only get to list all the menu table (which has more than 1000 records) its like my hbm.xml file doesn't run the stored procedure. Here's my hibernate file: <hibernate-mapping> <class name="model.Menu"

问题 I have the above tables i need to write the HIbernate entity class with annotation and mapping i have a problem while getting the List of ObjectAttributes.. Class are written as below @Entity public class Object { @Id private int id; private String name; @OneToMany(mappedBy="object",fetch=FetchType.LAZY) private List<ObjectAttribute> attrubuteList; } @Entity public class ObjectAttribute { @Id private int id; @ManyToOne @JoinColumn(name="objectId") private Object object; private String name; }

问题 The fundamental of ORM is mapping with the objects. But, for some reason, I don't want to create objects for running a query. Is there any way, in which without creating entities (managed classes), I can run a native SQL query? 回答1: Yes. You can. Create a method in the repository class with specific query (native query): @Query(value="select * from emp", nativeQuery=true) Object getAllFromEmp(); Keep this method in the repository interface and call it from the service class Or you can use

问题 I want to update a record associated with a primary key using Spring-JPA. GroupChatHeartBeat groupChatHeartBeat=new GroupChatHeartBeat(); groupChatHeartBeat.setId(user.getId()); groupChatHeartBeat.setGender(user.getGender()); groupChatHeartBeat.setHeartBeatTime(new Date()); groupChatHeartBeat.setUrl(userPhoto.getSrcBig()); groupChatHeartBeatRepository.save(groupChatHeartBeat); where GroupChatHeartBeat is declared as Entity, but doing so it's not replacing with new value. it is showing old

问题 When I try compile with Maven I get this error: INFO: HHH000041: Configured SessionFactory: null Error creating Session: org.hibernate.InvalidMappingException: Could not parse mapping document from resource com/baskeitor/models/User.hbm.xml But I don't see where is the error: User.java package main.java.com.project.models; public class User implements java.io.Serializable { private static final long serialVersionUID = 1L; private Long id; private String firstName; private String secondName;

问题 Consider the following entity-relationship diagram [PERSON] (*..N) ------ < is engaged into > ------ (*..N) [ACTIVITY] / \ hobby duty where [PERSON] and [ACTIVITY] are entities and <is engaged into> is a many-to-many relationship with attributes (flags) hobby and duty . The attributes are non-exclusive: both can be true or false independent of each other. How would one map this ERD to the Java object model shown below using JPA (or Hibernate)? @Entity class Person { Collection<Activity>

问题 I have my pojo classes Master: public class Master extends RecordSet{ private String empcode; private String empname; private String dept; public String getEmpcode() { return empcode; } public void setEmpcode(String empcode) { this.empcode = empcode; } public String getEmpname() { return empname; } public void setEmpname(String empname) { this.empname = empname; } public String getDept() { return dept; } public void setDept(String dept) { this.dept = dept; } DateRange: public class DateRange

问题 I am trying to create schema dynamically using hibernate / Java/ GWT, I am creating cfg.xml and hbm.xml files dynamically and storing it in database as blob. So I want to build sessionfactory for the schema. For the same I am creating configuration object using cfg.xml file, but since my hbm.xml files are in other table, they are not files on the file system, so how can I add it to configuration object as resource. I do not want to create files for them on file system . I tried addInputStream

问题 Below is the stored procedure: create or replace procedure proc_emp_name(v_emp out emp.emp_name%TYPE, v_empid in emp.emp_id%TYPE) is begin select emp_name into v_emp from emp where emp_id = v_empid; dbms_output.put_line('Emp Name: ' || v_emp); dbms_output.put_line('Procedure created successfully!!!'); end; I want to invoke this using Native SQL, followed this link but not sure how to retrieve the OUT parameter from the Procedure. http://www.mkyong.com/hibernate/how-to-call-store-procedure-in