Hiberante reverse-generates database tables

1,hibernate.cfg.xml Comment out this section of configuration <!--Update database level automatically--> <!--<property name="hbm2ddl.auto">create</property>--> 2. New Generate Database Table Tool Class public class HibernateSchemaExport { static Session session; static Configuration ...

Posted by rashu.dr on Sat, 18 Jul 2020 17:47:25 +0200

Picture deletion for laravel-admin

There is a deep doubt about laravel-admin's picture upload mechanism. Deleting avatar pictures on the user information page will cause an error. It was 1.4 at that time, and later updated 1.5 found that the delete button disappeared directly. If you use image normally in the form during the process of use, the slight ...

Posted by Lustre on Sat, 18 Jul 2020 16:38:30 +0200

ajax and servlet -- Verify that the user name exists

Verify that the user name exists -- using jQuery 1. Database mysql The user name already exists in the database. 2. html Page <body> <h1>User Login</h1> <hr> <form name="regForm" action="dologin.jsp" method="post"> <table> <tr> <td>user ...

Posted by splitinfo on Fri, 17 Jul 2020 16:26:13 +0200

phpmyadmin connects databases on multiple servers at the same time

1. Scenarios for use In general, there are test environments and formal environments for our development.Of course, databases are also separate.If you could use phpmyadmin to directly access mysql on both servers.This is the need. 2. Solutions 1. Find under the phpmyadmin folderConfig.sample.inc.php, renamedConfig.inc.php. 2. OpenConfig. ...

Posted by DanArosa on Wed, 15 Jul 2020 17:45:45 +0200

Mybatis (2) Parameters transfer

Mybatis parameter (Parameters) pass 1.. Single parameter Values of basic type, object type, collection type can be accepted.In this case, MyBatis can use this parameter directly without any processing.   <!-- according to id Query a record in a data table and encapsulate it User object --> <select id="selectById" resultType="com.s ...

Posted by aidema on Tue, 14 Jul 2020 17:19:14 +0200

Mybatis (2) Parameters transfer

Mybatis parameter (Parameters) pass 1.. Single parameter Values of basic type, object type, collection type can be accepted.In this case, MyBatis can use this parameter directly without any processing.   <!-- according to id Query a record in a data table and encapsulate it User object --> <select id="selectById" resultType="com.s ...

Posted by Errant_Shadow on Tue, 14 Jul 2020 17:19:34 +0200

Use ContentObserver to listen for text messages to receive onChange method calls twice

I used to use BroadcastReceiver to listen for text messages, but I later learned that ContentObserver can also do this, and it's more convenient.So try this. ContentObserver works by observing (capturing) changes in the database caused by a particular Uri and then doing some appropriate work. During the process of listening for text messages ...

Posted by samvelyano on Sun, 12 Jul 2020 18:29:20 +0200

Install MySQL 5.7 under CentOS 7.3

1. Download Download address: https://dev.mysql.com/downloads/mysql/ Select the version you need to install, where my computer is CentOS7.3 64 bit Then download RPM Bundle, a collection of several programs. Then start downloading... 2. Unzip the installation package Unzip mysql-5.7.20-1.el7.x86_64.rpm-bundle ...

Posted by cdwhalley.com on Thu, 09 Jul 2020 18:16:54 +0200

Chapter 7 Data Regulation: Cleanup, Conversion, Merge, Reshaping (4)

Chapter 7 Data Regulation: Cleanup, Conversion, Merge, Reshaping (4) The source of ldata is not given in this chapter and is availableMacrodata.csvTurn out available data. import pandas as pd import numpy as np import datetime ###Time processing later from pandas import Series,DataFrame ###Read inMacrodata.csvfil ...

Posted by quicknik on Tue, 07 Jul 2020 17:44:07 +0200

Java Exercise--Generics (12)

1. Write a Book class that has at least two properties, name and price.This class implements the Comparable interface by specifying that the size relationship between two Book class instances is the size relationship of the price attribute of the two Book class instances in the compareTo() method of the interface.In the main function, select t ...

Posted by arjay_comsci on Mon, 06 Jul 2020 16:49:39 +0200