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(1) Database creation 1) Database classification System database and user database; distinguish database type by viewing object Explorer; Note: the master database should not be moved. This is the database of the database. We mainly study the user database; 2) User database file composition T ...

In blogs [kowtow to Spring] - IoC's registration BeanDefinitions According to the analysis in, there are two ways to parse beans in Spring: If the root node or child node adopts the default namespace, the ා parseDefaultElement(...) method is called for default label resolution Otherwise, the beand ...

Because the built-in listview cannot meet the needs of the project, implement its own Adapter to inherit the ArrayAdapter to implement the Item project of the custom listview. Each item that appears and clicks on the ListView will not execute the onItemClick method in the setOnItemClickListener. The reason is that there are some sub controls ...

1, Add maven dependency and import the jar package required by FreeMarker 1 <dependency> 2 <groupId>org.freemarker</groupId> 3 <artifactId>freemarker</artifactId> 4 <version>2.3.20</version> 5 </dependency> 2, Define word template file 3, Modify template xml file Save the word fi ...

Advantages: Reduce layout nesting Better performance More powerful Reference blog: Android ConstraintLayout use details ConstraintLayout fully parsed. Let's optimize your layout ConstraintLayout visual operation Performance advantages of ConstraintLayout Introduction steps compile 'com.android.support.constraint:con ...

date: 2020-01-12 21:46:05 Article directory control Button TextView EditText ImageView ProgressBar AlertDialog ProgressDialog layout LenearLayout android:layout_gravity android:layout_weight RelativeLayout FrameLayout Percentage layout Other Custom control ListView Customizing the ListView UI o ...

1.1.usage of urlopen function #encoding:utf-8 from urllib import request res = request.urlopen("https://www.cnblogs.com/") print(res.readlines()) #urlopen Parameters #def urlopen(url, data=None, timeout=socket._GLOBAL_DEFAULT_TIMEOUT, # *, cafile=None, capath=None, cadefault=False, context=None): 1.2.urlretriev ...

Configuring spring mvc with annotations (1) configuration file for spring mvc <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="htt ...

The default jdk of Maven is version 1.5. It is too cumbersome to modify the jdk version again every time you create a new project, so the following methods can modify the default jdk version of Maven. Note: it's better to update Maven's version. The setting.xml jdk13 configuration is invalid when I use ...

Filter Chapter 1 basic use of filter 1. Initial filter Filter - filter: Filter is a component of J2EE Servlet module The function of Filter is to block URL s in a unified way Filter is usually used for global processing at the application level Three elements of filter development: *Any filt ...