Four Android event handling methods

There are four ways to handle the event, such as the screen shot and the button 1. Use anonymous inner class processing xml code <Button android:id="@+id/btn1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Anonymous Inner Class " ...

Posted on Tue, 30 Jun 2020 12:21:15 -0400 by andrewburgess

JPA many to many (intermediate table) / intermediate table many to many

thank CSDN-treemer thank CSDN-csdndz 1, Example the relationship between the user and the project Note: a User can create multiple projects, and a Project can have multiple users at the same time Relation table 1. entity Users User.java /** * @author LEI * Created by LEI on 2020/6/29. */ @Da ...

Posted on Tue, 30 Jun 2020 04:12:20 -0400 by wilzy

Record website visits

1. Create a table in the database to store the hits 2. Create a listener (MyWebListener) to implement the ServletContextListener interface. When the project is started, the hits are obtained through the dao layer (ContextMapper) and stored in the ServletContext. 3. Increase the number of visits when vi ...

Posted on Tue, 30 Jun 2020 02:50:41 -0400 by Derokorian

Several special ways of Spring Bean instantiation

ServiceLoader uses the reverse control in JDK ServiceLoaderFactoryBean AutowireCapableBeanFactory#createBean BeanDefinitionRegistry#registerBeanDefinition RumenzFactory interface and default implementation class DefaultRumenzFactory RumenzFactory.java package com.rumenz; public interface RumenzFactory { //jdk1.8 default implementation ...

Posted on Tue, 30 Jun 2020 02:10:36 -0400 by HektoR

spring annotation Driven Development -- attribute assignment

1. @Value assignment and @ PropertySource loading configuration file SpEl Introduction: https://www.jianshu.com/p/e0b50053b5d3 @Value assignment public class Person { //Use @ Value to assign Value; //1. Basic value //2. You can write a spiel; ා {} //3. You can write ${}; take out the val ...

Posted on Tue, 30 Jun 2020 00:29:28 -0400 by utahcon

Spring security

The mind map is as follows RBAC authority analysis RBAC is the full name of role-based permission control. This section will describe RBAC from the following aspects: what is RBAC, model classification, what is permission, the use of user groups, and case analysis Mind map Draw a mind map as follows ...

Posted on Mon, 29 Jun 2020 23:20:10 -0400 by Ward

Multithreaded thread pool

The start and end of each thread consumes time and resources. If a lot of threads are used in the system, a large number of start and end actions will cause the performance of the system to change card and slow down the response. In order to solve this problem, the thread pool is introduced. The patter ...

Posted on Mon, 29 Jun 2020 22:49:53 -0400 by sheriff

Quick media Chinese QR code support

Quick media Chinese QR code support Quick-Media The project provides a series of out of the box tools for multimedia operations, such as image editing and synthesis, markdown/html/svg rendering, audio processing; and of course, the two-dimensional code generation and analysis highlighted in this paper QRcode plugin supports the generation of ...

Posted on Mon, 29 Jun 2020 22:22:46 -0400 by webref.eu

Java MongoDB Save Pictures

This article describes how to save a picture file to MongoDB using the GridFS API.The GridFS API can also save other binary files, such as video and music files. 1. Save pictures The following code uses the photo namespace, and the new filename saves the picture to MongoDB. String newFileName = "mkyong-java-image"; File imageFile = new ...

Posted on Mon, 29 Jun 2020 12:24:51 -0400 by NewPHP_Coder

uni-app+springmvc calls JSAPI to complete H5 WeChat official account payment.

1. The application process and background development configuration of wechat service account merchants are brief. Follow the prompts to do OK, and the focus is on the development process 2. Development process flow chart: Sequence diagram: Development and use framework: the H5 end is implement ...

Posted on Mon, 29 Jun 2020 05:28:39 -0400 by tefuzz