hibernate mapping

Mappingresources is used to specify a small number of hibernate profiles like this Propertyname= "Mappingresources"> List> value>WEB-INF/CONF/HIBERNATE/CAT.HBM.value> value>WEB-INF/CONF/HIBERNATE/DOG.HBM.value> . ..... - List> Property>Mappingdirectorylocations: Bulk Importname= "mappingdirectorylocations"> List > value>web-inf/conf/

Last night in their own computer set up the SSH environment to run a good, build success when I was small excited, and then today put on the company's computer, directly to me a could not the parse mapping document from resource, when I was careful liver broken directly , and it changed me for a few hours, and finally in http://blog.csdn.net/mydeman/article/details/6134820.Found the answer, *.hbm.xml referenced the wrong DTD file path "http://www.hibe

Label:because recently wrote the project needs to arrive, is here the code word, facilitates later makes a reference, here, I through is the MyEclipse reverse engineering to configure the persistence class and the data mapping file. 1. Open MyEclipse, open the database view, corresponding to Windows->open Perspective->myeclipse DB explore.2. In the view that appears, we select the corresponding database, right-click to connect, and then to the corresp

The error code is as follows:caused by:org.hibernate.DuplicateMappingException:duplicateImport: Engin refers to both Two.entity.Engin and Allview.entity.Engin (TryUsing auto-Import= "false") at Org.hibernate.cfg.configuration$mappingsimpl.addimport (Configuration.java:2892) at Org.hibernate.cfg.HbmBinder.bindPersistentClassCommonValues (Hbmbinder.java:681) at Org.hibernate.cfg.HbmBinder.bindClass (Hbmbinder.java:595) at Org.hibernate.cfg.HbmBinder.bindRootClass (Hbmbinder.java:325) at Org.hibern

(personId bigint not null primary key, addressid bigint NOT null unique) CREATE TABLE Address (addre SsId bigint NOT null primary key)Associating with a connection tableAssociations that use join tables are typically for many-to-many. The join table is a separate table in the data that stores the relationships of two entities.This table has three fields: its own ID, and two foreign keys are related to the primary key of the two entities, respectively.The following is the link between student an

person = new person ();p Erson.setid (1234l);p erson.setage;p erson.setfirstname (FirstName); Person.setlastname (lastname); Session.save (person); Session.gettransaction (). commit (); private void Addpersontoevent (Long Personid,long EventID) {Session session = Hibernateutil.getssessionfactory (). Getcurrentsession (); Session.begintransaction (); Person Aperson = (person) session.load (Person.class, PersonID); Event Aevent = (event) session.load (Event.class, EventID); Aperson.getevents ().

need to create an intermediate table that stores the primary key ID of two tables respectively)Key indicates the corresponding column,The Userdetails attribute is in the role class(4) Also many to many, with the same(5) The Department is self-related, the superior department is many to one, the subordinate department is a pair of many(6) Permissions are self-correlating, same as aboveThree: test, create a table when creating a sessionfactory, write a junit test execution(1) The Discovery table

Hibernate enum Mapping detailedHere we introduce the form of annotations, and if you want to understand how XML is configured, you can find the relevant data yourself.For example, the following entity@Entity @table (name= "T_user") Public classUserImplementsSerializable {/** * */ Private Static Final LongSerialversionuid = -9042615274714038279l; @Id @GeneratedValue (Strategy=Generationtype.auto)

Learning record O (∩_∩) o, if you happen to pass by, I hope you can stop to see, the shortcomings of the point, I appreciate it ~using Tools :1, Eclipse 2, Hibernate compression Pack (hibernate_4.3.11) 3, MySQLReady to work: Create a project--import Hibernate.jar Package--Write Hibernate.cfg.xml Profile Connection databaseWrite a class to read a Hibernate.cfg.xmlOne-way one-to-many (example: A department has multiple employees) 1. Build table (Employe

privateprivate private Private Long Wjid; }Use the HQL statement when querying a single primary keyFrom BBWJJC bw where bw. Bbwjjcid.wjid=?Result Error:Could not resolve Property:bbwjjcid OF:COM.CSKJ.HIBERNATE.MAP.BBWJJC [from COM.CSKJ.HIBERNATE.MAP.BBWJJC bw where bw. Bbwjjcid.wjid= ' 5 ']On the internet to check a bit, said is the problem of HQL statement.Test the most of the day results debugging is normal, the original is bw. Bbwjjcid.wjid=? The bbwjjcid in the

For enumeration types, you cannot simply map the corresponding database field type (unless the custom type) by Org.hibernate.annotations.Type annotations. In this case, Hibernate provides javax.persistence.Enumerated annotations, which have two scenarios for the parameters of the annotation:1.enumtype.string: When using this parameter, the string value of the enumeration is stored in the database table;2.enumtype.ordinal: When using this parameter, th

1. Execution: new->conceptual Data ModelAfter compiling the conceptual model2. Execution: tools->generate physical Data ModelThen select the generated physical data model3. Implementation: Tools->generate object-oriented ModelIn the dialog box, select Dtail, tick O/R Mapping, click Enable transformations, in the more out of the tab extended Model In this position to load a little something of ha .... Because I have the longest card in this place.

There are different starting points for establishing a domain model and a relational data model.Domain model (object-oriented design): Consists of program code, which can improve the reusability of code and simplify programming by refining the granularity of the persisted class.Relational data Model (database design): In the absence of data redundancy, you should minimize the number of tables and simplify the referential relationships between tables in order to increase the speed of data access.

Hibernate Federated Primary Key mapping rules: First: Primary keys and attributes in a class 1. Configuration files Note: The primary key configuration label for the Federated primary Key is represented by 2. 2. Mapping rules for federated primary keys Each primary key attribute in the class corresponds to each primary key column in the data table.

configuration (); Cfg.configure (); Sessionfactory sessionfactory=cfg.buildsessionfactory (); Session s=sessionfactory.opensession (); S.begintransaction (); Student student= (Student) s.load (student.class,1); We will now change the language score to 0 points for (Course course:student.getCourses ()) { System.out.println (Course.getcoursename () ); if ("Language". Equals (Course.getcoursename ())) {for (scor

inserted after the department (depart), it generates three database statements//Because the EMP depart_id field is not inserted after both insertions, so there is a last statement to insert Tx.commit (); return depart ;} Finally{if (s!=null) {s.close ();}}} static Employee query (int empId) {Session s = null; Transaction tx = Null;try{s = Hibernateutil.getsession (); tx = S.begintransaction (); Employee EMP = (employee) s.get (Employee.class, empId); Query System.out.println (Emp.getname ()) by

This first stores the set set in the database. is to create a new table, the primary key for the new table corresponds to another foreign key, and each value of the collection corresponds to a record, which is distinguished by the same set of data as the primary key value.Package Test.hibernate.set;import Java.util.set;public class User {private Integer id;private String name;private Set Package Test.hibernate.set;import Java.util.hashset;import Java.util.set;import org.hibernate.session;import

1. Write the hibernate mapping file. Entity types are converted to tables in the databaseWritten according to the entity type.Entity type User.javaPackage Cn.wwh.www.hibernate.dd.property;import java.util.arrays;import java.util.date;/** * Class Function: * * * @author Skiff *@ Version 1.0 *@ created: 2014-8-17 pm 08:05:30 */public class User {private Integer id;private String name;//Name Private Boole an g

In the previous blog, "A Mouthful of eating hibernate (d)-multi-One one-way association mapping", introduced a Many-to-many association mapping, today on the contrary to a One-to-many one-way association mapping. There may be some confusion about the topic of these 2 blogs, which is a little different from the daily s

Hibernate provides two ways to map relationships on a one-to-one basis:1) Follow foreign key mapping2) Follow the primary key mappingThe following is an example of the Employee Account form and the Employee Profile table (a one-to-two relationship between the employee account and the file table), which is described in the following two mapping relationships, and each of these mappings is used to perform per