Easy to use Java tool class library! GitHub star Mark 10K+

osc_8eb8cps3 2020-11-08 13:02:01
easy use java tool class


author :Ryan Wang

link :https://ryanc.cc/archives/hutool-java-tools-lib

brief introduction

Hutool yes Hu + tool I made my own words , The former pays homage to me “ A former company ”, The latter means tool , homophonic “ Muddle headed ”, Moral pursuit “ All things are confused , It doesn't matter , It doesn't matter ” The state of .

Hutool It's a Java tool kit , It's just a toolkit , It helps us simplify every line of code , Reduce every method , Give Way Java Language can also “ Sweet ”.Hutool It was originally in my project “util” A finishing of the bag , Later, it gradually accumulated and added more non business related functions , And learn the essence of other open source projects , After self arrangement and modification , The result is a rich set of open source tools .( Copy from the author's profile )

function

One Java Basic tools , The file 、 flow 、 Encryption and decryption 、 transcoding 、 Regular 、 Threads 、XML etc. JDK Method to encapsulate , Make up all kinds of Util Tool class , The following components are also provided :

  • hutool-aop JDK Dynamic agent encapsulation , Provide non IOC Next aspect support

  • hutool-bloomFilter Bloon filtration , Provide some Hash Algorithm's bloom filtering

  • hutool-cache cache

  • hutool-core The core , Include Bean operation 、 date 、 Various Util etc.

  • hutool-cron Timing task module , Provide classes Crontab Expression timing task

  • hutool-crypto Encryption and decryption module

  • hutool-db JDBC Data operation after encapsulation , be based on ActiveRecord thought

  • hutool-dfa be based on DFA Multi keyword search of model

  • hutool-extra Extension module , Encapsulate... To a third party ( template engine 、 Mail, etc. )

  • hutool-http be based on HttpUrlConnection Of Http Client encapsulation

  • hutool-log Automatic recognition of the log door

  • hutool-script Script execution encapsulation , for example Javascript

  • hutool-setting More powerful Setting Configuration files and Properties encapsulation

  • hutool-system System parameter call encapsulation (JVM Information, etc )

  • hutool-json JSON Realization

  • hutool-captcha Picture verification code implementation

A simple test

These two days use Hutool hold Halo in

Some code of the face has been replaced , Have to say , It's easy to use , Here is a brief introduction to some of the Hutool Tool class of .

SecureUtil( Encryption and decryption tools )

It is mainly used in login and password modification , Because the password in the database is md5 Encrypted , So when you log in, you need to encrypt first and then query the database , Use Hutool Words , Just call SecureUtil Medium md5 The method is ok .

user = userService.userLoginByName(loginName,SecureUtil.md5(loginPwd));

HtmlUtil(HTML Tool class )

This tool class is more powerful , But I am Halo The most used one is HtmlUtil.encode, You can convert some characters into safe characters , prevent xss Injection and SQL Inject , For example, the following comments are submitted .

comment.setCommentAuthor(HtmlUtil.encode(comment.getCommentAuthor()));

This is to prevent the villain from intentionally writing something executable js Code , Then submit a comment , This code will be executed in the background panel , More dangerous , Use encode The method can be

It can be <script> Label to translate into <script>, After this transformation ,js The code will not execute .

in addition ,HtmlUtil The following methods are also provided , If you are interested, you can try .

  • HtmlUtil.restoreEscaped Restore the escaped HTML Special characters

  • HtmlUtil.encode In the escape text HTML Characters are safe characters

  • HtmlUtil.cleanHtmlTag Clear all HTML label

  • HtmlUtil.removeHtmlTag Clear designation HTML Tags and content surrounded by tags

  • HtmlUtil.unwrapHtmlTag Clear designation HTML label , Not including content

  • HtmlUtil.removeHtmlAttr Remove HTML Properties in Tags

  • HtmlUtil.removeAllHtmlAttr Remove all attributes of the specified tag

  • HtmlUtil.filter Filter HTML Text , prevent XSS attack

CronUtil( Timing task )

This tool is even more powerful , There's no need for anything like quartz Such a framework to do timed tasks , and CronUtil There is no need for any other dependence , Only need resources Create a configuration file , Then, when the program starts, start the scheduled task , Such as Halo The scheduled backup function of ( Every morning 1 Click backup once ).

cron.setting:


cc.ryanc.halo.web.controller.admin.BackupController.backupResources = 0 0 1 * * ?
cc.ryanc.halo.web.controller.admin.BackupController.backupDatabase = 0 0 1 * * ?
cc.ryanc.halo.web.controller.admin.BackupController.backupPosts = 0 0 1 * * ?

@Override
public void onApplicationEvent(ContextRefreshedEvent event){
this.loadActiveTheme();
this.loadOptions();
this.loadFiles();
this.loadThemes();
// Start timing task 
CronUtil.start();
log.info(" Timed task started successfully !");
}

Please refer to the document for details http://hutool.mydoc.io/?t=255673

Okay , Introduce these three tool classes , You can try other tools if you are interested , It's quite complete , This should be the best tool library I've ever used , It's worth a try .

Official website address :http://www.hutool.cn/

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