Feign's understanding and examples

1, What is Feign Feign is a lightweight open-source Rest client of Netflix company. Spring cloud encapsulates feign. Feign integrates Ribbon by default to realize client load balancing calls. To use feign, you only need to define an interface and configure it with annotations (just add annotations o ...

Posted on Sun, 16 Feb 2020 05:23:45 -0800 by ManInBlack

Algorithm notes: Zuoshen primary bubbling, selection, insertion, merging and sorting

Time complexity Constant time operation: if an operation has nothing to do with the amount of data, each operation is completed in a fixed time, which is called constant operation. Time complexity is an indicator of the number of constant operations in an algorithm process. It is often expressed by O ...

Posted on Sun, 16 Feb 2020 00:29:56 -0800 by dadamssg

I understand the distributed system. I have everything you need to know

Preface When it comes to distributed systems, we have to say centralized systems. In the traditional centralized system, everything in the whole project is in one application. A website is an application. When the system is under great pressure, it can only expand horizontally, add multiple servers or ...

Posted on Sun, 16 Feb 2020 00:26:05 -0800 by scottchr226

for loop in shell

Article directory for loop in shell 1. The usage and running process of C-style for loop usage Operation process General form of for loop 2. Example of C language style for loop 1. Calculate the sum of 1 to 100 2. Omit initialization conditions 3. Omitting judgment conditions 4. Omit auto increas ...

Posted on Sat, 15 Feb 2020 19:51:59 -0800 by saunders1989

Java collection defragmentation (1)

Classification of sets: 1.collection interface List interface ArrayList class Vector class LinkedList class Set interface HashSet class TreeSet class List: the stored objects are orderly (the order of the elements is the same as the order of adding) and can be repeated ArrayList: the underlying data structure is array. The thre ...

Posted on Sat, 15 Feb 2020 10:47:56 -0800 by amo

SpringBoot -- Application Event

Spring events provide support for message communication between Bean and Bean. After a Bean finishes processing a task, we hope that another Bean knows and can handle it accordingly. Then we need to let a Bean listen to the events sent by the current Bean. Spring events need to follow the following process: Custom events, integrating Applicati ...

Posted on Sat, 15 Feb 2020 09:40:53 -0800 by mikevarela

Using eclipse to write a java web program with simple login and registration function in the form of MVC 2

Please pay attention to the version before using. My tomcat is version 9.0, and the notes in it are less, which may be more laborious for novices. First, create a demo database and then a user table in Mysql. The code is as follows create database Demo default charset=utf8; use Demo; create table user ...

Posted on Sat, 15 Feb 2020 08:24:16 -0800 by Webbyturtle

Grabbing the final sql with the mybatis plug-in

Summary of pain points When we are de bug ging and need to see the complete sql, we can get the sql as shown in the figure in the console Then manually replace the question mark placeholders one by one and go to MySQL to see if there is any problem with sql. If the sql is simple, it's easier to say. If it's a complex sql, manually replace N qu ...

Posted on Sat, 15 Feb 2020 08:17:40 -0800 by nilansanjaya

Hadoop cluster installation

Hadoop cluster installation   Cluster planning   Server Hadoop 101 Server Hadoop 102 Server Hadoop 103 HDFS NameNode DataNode DataNode DataNode SecondaryNameNode Yarn NodeManag ...

Posted on Sat, 15 Feb 2020 07:15:54 -0800 by patrickcurl

Delete selected actions in table

I. Preface Recently, in the Java Web exercise, there is a requirement to delete the data checked in the table. At this time, you need to obtain which check box is checked and submit it to the servlet to call the method to delete, as shown in the figure Two, train of thought Here, you can add a form label to the outside of the whole form, and ...

Posted on Sat, 15 Feb 2020 06:37:54 -0800 by 99degrees