Spring MVC: unified exception handling and file upload and download

exception handling SimpleMappingExceptionResolver HandlerExceptionResolver interface custom exception Use @ ExceptionHandler annotation File upload and download If it's a picture, please refer to another Spring boot spring boot single / multi image upload and echo 1.SimpleMappingExceptionResolver cl ...

Posted on Tue, 18 Feb 2020 04:17:23 -0800 by greenba

Teach you an easy way to speed up your Eclipse startup by 1.5 seconds!

Have you ever thought about the Eclipse you use every day What kind of garbage collector does it use? How many GC S have been executed at startup? Can you tune its startup speed? In this article, I will introduce how I can tune Eclipse to make its startup speed increase by 1.5 seconds. You may say that it's only 1.5 seconds. It needs to be s ...

Posted on Thu, 06 Feb 2020 22:12:29 -0800 by svanderclock

ROS and Arduino: compile code with CMake and upload to Arduino

Why use CMake to compile code and upload it to arduino? When large software projects need to be developed, the Arduino IDE becomes clumsy in code management. If you often want to compile code from the command line or from eclipse that can be done automatically Finally, you can build and distribute firmw ...

Posted on Wed, 29 Jan 2020 00:23:20 -0800 by Spaceman-Spiff

Getting started with Mockito for Eclipse

Getting started with Mockito for Eclipse Summary In Java unit testing, we often encounter scenarios that depend on other modules, but other modules are not well developed, such as the following figure:  The "tested module A" depends on the module B/C/D. during unit test, you can Mock the B/D (Note: you do not need ...

Posted on Tue, 28 Jan 2020 07:24:19 -0800 by Karve

Java games - greedy snake

Greedy snake in Java games System goals Greedy snake is a puzzle game. Through the design and implementation of this game, you can improve your Java technology ability, enhance your independent development ability and master the development process of the project. development environment System en ...

Posted on Mon, 27 Jan 2020 00:02:59 -0800 by phpian

Eclipse + Spring boot development tutorial

I. Preface This article is for reference https://www.cnblogs.com/lsdb/p/9783435.html Learn to organize your study notes. Configuration information: Eclipse IDE for Enterprise Java Developers(Version: 2019-09 R (4.13.0)) Java 1.8 2, Install the Spring plug-in Open Eclipse, select Help - > Eclipse ...

Posted on Tue, 21 Jan 2020 05:49:20 -0800 by xander85

Use of Jps tools

1. About JPS JPS (full name: Java Virtual Machine Process Status Tool). A tool that comes with you under the% JAVA_HOME%/bin directory after you install JDK. Used to view JAVA processes running on the computer. (as shown in the figure below) on the Linux machine, I usually use ps -aux|grep java. The tool is only 16KB, which ...

Posted on Thu, 02 Jan 2020 19:16:03 -0800 by watsmyname

The use of alicloud MQTT signature authentication mode for Android client

The project needs to realize Android message push, which is pre researched Aurora push,Alicloud MQTT Finally, Alibaba cloud MQTT is selected. The specific implementation steps are as follows: 1. Add dependency: Add in build.gradle under the project root directory: repositories { maven { url "https://repo.eclipse ...

Posted on Fri, 06 Dec 2019 16:43:37 -0800 by JayBlake

Independent access to alicloud IoT platform (Java) based on open source MQTT

By GXIC wongxmig Finish, welcome to follow IoT developer community. 1. Preparation 1.1 register alicloud account Use personal Taobao account or cell phone number to open the account of Ali cloud, and pass the real name authentication (can be certified by Alipay). 1.2 free IoT Suite Product official website https://www.aliyun.com/product/iot 1 ...

Posted on Fri, 06 Dec 2019 02:52:32 -0800 by chris_rulez001

When Nexus 3 searches using Maven coordinates, the Version field cannot search for the SNAPSHOT version

In this article, we use Java to generate a poster imitating Golden Mountain Ciba. As long as you can still grab a breath, you fight. As long as it lasts, you will have to fight. For a while, I was particularly fascinated with the daily poster of Golden Mountain Ciba.Because not only the pictures on the posters are beautiful, but also the words ...

Posted on Thu, 14 Nov 2019 13:12:34 -0800 by Leppy