After MySQL uses the column alias, Hibernate still reads the original column name instead of the alias

phenomenon hibernate cannot find the required field from the returned result set, such as user ﹣ name, when executing the program Error message: 2020-05-15 10:37:01.330 [INFO][org.hibernate.type.StringType][nullSafeGet][180]-> could not read column value from result set: from_classifier_id; Column 'from_classifier_id' not found. 2020-05 ...

Posted on Fri, 15 May 2020 09:05:36 -0700 by usacascl

7.6 hibernate mapping: one way many to many Association

hibernate mapping - one way many to many Association n-n association must use join table Similar to the 1-n mapping, the set element must be set to add a key sub element, and the foreign key referring to the CATEGORIES table in the CATEGORIES & ITMS table must be the CATEGORIES & ID. different from the 1-n association mapping, when th ...

Posted on Sun, 03 May 2020 14:04:04 -0700 by Waldir

I don't believe you all know the principle of native dynamic agent and CGLIB dynamic agent in Java!

Yunqi information:[ Click to see more industry information]Here you can find the first-hand cloud information of different industries. What are you waiting for? Come on! Dynamic proxy is widely used in Java, such as Spring AOP, Hibernate data query, back-end mock and RPC of test framework, Java annotation object acquisition, etc. The proxy rela ...

Posted on Sun, 12 Apr 2020 22:36:30 -0700 by kcpaige89

Impact of using OpenSessionInViewFilter

Test controller method: @ResponseBody @RequestMapping(value = "/testFlush/json", produces = SystemHWUtil.RESPONSE_CONTENTTYPE_JSON_UTF) public String json2(Model model, HttpServletRequest request, HttpServletResponse response , int id) { // Session session=this.houseEvaluateDao.getSessionFactory().getCurrentSession( ...

Posted on Sat, 04 Apr 2020 03:32:01 -0700 by konigwolf

Hibernate (III) openSession and getCurrentSession

1, OID, HQL, SQL, QBC operations 1.1 ibernate has four operation modes, namely OID, HQL, QBC and SQL.   OID: object identifier. Hibernate is used to mark the unique object. In fact, it is the primary key Available operations: add, delete, modify and query For example, we often use save, update, delete, get, load, saveOrUpdate and other m ...

Posted on Sun, 29 Mar 2020 11:52:57 -0700 by buddhika2010

JPA object inheritance relationship

In the process of entity modeling, some entities will have many kinds of deformations, most of which are common, only a small part is unique. At this time, the more elegant design is to abstract the shared attributes to form a base class, and then the implementation class extends the unique attributes. Domain services can abstract common servic ...

Posted on Wed, 25 Mar 2020 05:18:10 -0700 by dancahill

[SSH] establishment of integrated development environment for SSH Framework

This paper summarizes the main steps of setting up the environment before using SSH framework. The environment built here is Struts2+Spring4+Hibernate5. The integration of the new version is also similar. First of all, I will review the general implementation of each layer involved in SSH Framework ...

Posted on Sat, 22 Feb 2020 04:13:26 -0800 by LostKID

Overview of Spring Data JPA

Overview of Spring Data JPA 1.1 overview of spring data JPA Spring Data JPA is a set of JPA application framework based on ORM framework and JPA specification. It enables developers to access and operate the database with simple code. It provides common functions including addition, deletion, modif ...

Posted on Wed, 19 Feb 2020 19:50:00 -0800 by itsmeArry

The use and principle of ThreadLocal

I. overview The simple understanding of ThreadLocal is to share resources for a thread, save some resources in the thread through set() method, and then obtain this resource through get method. It solves the problem of sharing the same object or variable in the same thread and method of different clas ...

Posted on Wed, 05 Feb 2020 23:24:57 -0800 by vhaxu

Hibernate multi table design

Multi table design In the development process, the requirement analysis is carried out in the early stage. The requirement analysis provides E-R diagram, and the table structure is compiled according to the ER diagram. There are three relationships between tables: one to many, many to many, and o ...

Posted on Tue, 04 Feb 2020 03:33:57 -0800 by dannyz