Programmer Think

1. Key xml configuration tables    server.xml The user tab specifies the account to access the database. <?xml version="1.0" encoding="UTF-8"?> <!-- - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - Y ...

In the actual development, we always use paging query. Different database paging SQL methods are different. We can use paging plug-ins to help us separate queries. We only need to care about the data itself, not the place 1. Plug in introduction Configure the paging plug-in in the core configuratio ...

data storage File store, SharedPreferences, database store File store In the way of Java flow public class MainActivity extends AppCompatActivity { private EditText editText; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.lay ...

target() Restrict connection point matching to a class of the specified type @target() Restrict join point matching target objects to classes annotated by specific annotations The function of within() is similar to that of execution(). The difference between the two is that the minimum range of connection points defined by w ...

this() If the proxy class matches the specified class according to the type, then all connection points of the target class to be proxy match the tangent point In general, this() and target() are used to match and define pointcuts. They are equivalent. The difference between them is reflected in the specific performance of generating ...

Xpath Preparatory knowledge HTML DOM model example The HTML DOM defines a standard way to access and manipulate HTML documents, representing them in a tree structure. How to parse the crawler data? 1. Locate nodes in html documents 2. Extract the properties of the specified node, such as href,cla ...

@annotation() Restrict matching of join points with specified annotations The final structure of each class is as follows: 1,Factory package com.test.aspectj.expression; /** * Factory interface */ public interface Factory { // Make products void make(); // transport void delivery(String address); } ...

The goal of reference enhancement is to add some new methods and properties to the target class. Take the Waiter class as an example. Now you want to add a manage() method in the Management interface to it without modifying the code of the Waiter class. 1. Classes to enhance package com.test.springadvicetype; import org.springframework.s ...

Reprinted from Read the source code of mybatis (8) -- Interceptor 1 Intercetor MyBatis allows you to make intercept calls at some point during the execution of mapped statements. By default, MyBatis allows the use of plug-ins to intercept method calls including: Executor (update, query, flushState ...

Last time I talked about Activity, this time I talked about ContentProvider, one of the four components of Android 1. What is ContentProvider ContentProvider is one of the four components of Android content provider Function: data interaction & sharing between processes, i.e. cross process communication 2.uri introduc ...