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Design and Implementation of DAO Layer Here we use Spring DATA JPA to implement database operations, of course, you can also use Mybatis, which is the same, we still use user table operations as an example: /** * AdUserRepository for User Data Base Operating Interface * Inherited from JpaRepository < AdUser, Long>, the first parameter A ...

Preface Step on the pit + memo, one-click configuration script depth, so use official links   Reference link v2ray document https://www.v2ray.com/chapter_00/install.html nginx architecture https://blog.csdn.net/fengfeng0328/article/details/82828224 Overall process https://www.xpath.org/blog/ ...

Design and Implementation of DAO Layer Here we use Spring DATA JPA to implement database operations, of course, you can also use Mybatis, which is the same, we still use user table operations as an example: /** * AdUserRepository for User Data Base Operating Interface * Inherited from JpaRepository < AdUser, Long>, the first parameter A ...

Summary: One of the load balancing methods mentioned in previous blogs is lvs. The configuration of LVS is simple, which reduces the probability of errors. Moreover, the software is in the fourth layer of the tcp/ip protocol stack. It can provide various web application services. However, because it does not support regular expression processi ...

Summary: Limitations Compared with the local file system, the function and performance provided by ossfs have some limitations. Specifically include: Random or additional writing of a file results in rewriting of the entire file. Metadata operations, such as list directory, have poor performance because they require remote access to oss se ...

1. Why use cURL In order to get web content, we can use file_get_contents, file, readfile and other functions, but they lack flexibility and effective error handling. Moreover, some difficult tasks can not be accomplished, such as processing coockies, validation, form submission, file upload and so on. More ways for PHP to get web content: htt ...

The experimental environment: Operating system: redhat EL 6.5 Machine: Scheduler: server1: 172.25.12.1 ipvsadm RS Real Host: server2: 172.25.12.2 arptables_jf server3: 172.25.12.3 arptables_jf Principle of experiment: The client accesses vip (virtual ip), which is available on all the machines in the cluster, but the clien ...

Curl command is a file transfer tool that uses URL rules to work on the command line. It supports the upload and download of files, so it is a comprehensive transmission tool, but according to tradition, curl is customarily called the download tool. It supports many protocols including HTTP, HTTPS, ftp, etc. It also supports POST, cookies, aut ...

backgroundRecently, I was entrusted by my friend to implement cacti's micro-alert function for him, but in my impression, cacti's thold plug-in seems to only have email alert function? So I spent a little time searching the Internet for relevant information, and found that the information of cacti's micro-message alarm was very little. The only ...

In the last introductory tutorial, we were able to quickly build a basic Flink program. This article will take you step by step to implement a more sophisticated Flink application: real-time hot commodities. Before starting this article, we recommend that you practice the previous article first, because this article will follow the my-flink-pr ...