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1. Create a project with the name hibernatedemo23 and the directory structure as shown in the figure.2. Create a lib directory in the project to store jar files. The directory structure is shown in the figure.3. Create the entity class Forum, package name (com.mycompany.demo.bean) in the src directory, as shown in the figure4. The content of th ...

Easyui is a powerful plug-in in jquery. We often encounter complex layout or write a lot of code when implementing a function, such as paging, so easyui's datagrid will replace it. Now I briefly share several cases. First, we create an employee's entity class and paste Emp.hbm generated by hibernate in reverse. The code is complete, so as to a ...

1. Create a project with the name hibernatedemo26 and the directory structure as shown in the figure.2. Create a lib directory in the project to store jar files. The directory structure is shown in the figure.3. Create the entity class Forum, package name (com.mycompany.demo.bean) in the src directory, as shown in the figure4. The content of th ...

The reasons for the error are as follows: Exception in thread "main" org.hibernate.exception.JDBCConnectionException: Cannot open connection at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:99) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.exception.JDBCExc ...

Recently, in the process of development, we encountered the problem of using Transaction marked as rollback only. We learned the reasons for the error: It should be an error caused by multiple rollbacks of transactions. Looking at the code carefully, because the project has opened a transaction in aop aspect, contro ...

Using User as the Operating Object package com.swift.jdbc; public class User { private Long user_id; private String user_code; private String user_name; private String user_password; private String user_state; public User() { super(); // TODO Auto-generated constructor ...

First, what is generics?Java generic design principle: As long as there is no warning at compile time, there will be no ClassCastException exception at run time. Generics: Delay typing until you create an object or call a method to specify a particular type Parametric types: E in ArrayList < E > is called type parameter variableInteger in ...

In the last article, we integrated swagger ui and built a restful-style interface. When doing logic processing, we must first do parameter verification. This article describes the use of javax.validation for parameter verification. 1. Create a new entity class with the annotation of javax.validation import org.hibernate.validator.c ...

EventHub: InputManagerService: In the last blog post Android Input Subsystem: Creation of Input Process, Listening for Thread Startup In this article, we learned about the Android Input system event monitoring module and learned that InputReader starts listening for events from EventHub when InputManagerService starts. Today, ...

hibernate comes with a simple logging framework. Here we introduce a powerful logging framework log4j. Baidu Encyclopedia's introduction to log4j is very good. Most of the content below is copied from Baidu Encyclopedia. Introduction to log4j (Baidu Encyclopedia) Log4j is Apache An open source project, using Log4j, we can control the destinat ...