Magento2后台模块moudule其实很简单，可以参考已有的代码，规范写法，就可以开发出自己想要的功能模块，这里给一个基本的后台模块开发示范实例:

• To add a menu/sub-menu, check out the following files:
  • etc/adminhtml/menu.xml
  • etc/adminhtml/routes.xml
• To bind a page to those submenus, check out the following files:
  • You will notice the path to look like the action parameter from etc/adminhtml/menu.xml
  • Controller/Adminhtml/SampleOne/Index.php
  • Controller/Adminhtml/SampleTwo/Index.php
• To add content to your freshly created pages, check out the following files:
  • view/adminhtml/layout/adminsample_sampleone_index.xml
  • view/adminhtml/templates/sample/one.phtml
• To add content to your freshly created pages and pass something to it, You can also check:
  • view/adminhtml/layout/adminsample_sampletwo_index.xml
  • Controller/Adminhtml/SampleTwo/Index.php
  • view/adminhtml/templates/sample/two.phtml
• To set and retrieve values from Magento2’s configuration you can check these files:
  • Controller/Adminhtml/SampleTwo/Index.php
  • etc/adminhtml/system.xml Configuration menu in Stores/Settings/Configuration is set here
  • etc/config.xml Default configuration
  • view/adminhtml/templates/sample/two.phtml
• To see how ACLs are made, check these files:
  • etc/acl.xml
  • You’ll notice that most resource elements are from etc/adminhtml/menu.xml
• To see how to have different layouts, check this file:
  • view/adminhtml/layout/adminsample_sampletwo_index.xml
• To see how we create a custom block and use it, check those files:
  • Block/Adminhtml/CustomBlock.php
  • view/adminhtml/layout/adminsample_sampletwo_index.xml
• To see how you use block functions, have a look at:
• Block/Adminhtml/CustomBlock.php
  • view/adminhtml/templates/custom/one.phtml
• To call a helper from a block you can check:
  • Block/Adminhtml/CustomBlock.php
  • Helper/ConfigHelper.php
  • view/adminhtml/templates/custom/one.phtml

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