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Links to the original text: https://www.runoob.com/java/java8-streams.html Reference address for this article: https://www.runoob.com/java/java8-streams.html   What is Stream? The Java 8 API adds a new abstraction called Stream, which ...

The Foundation of MyBatis Series (10) Dynamic SQL Statements in Mybatis 1. Overview of Dynamic SQL Referring to the official documents, it is described as follows: They are: if choose (when, otherwise) trim (where, set) foreach 2. Label of ...

1. Small and large tables join 1.Definition //Keys are relatively dispersed and tables with small amounts of data are placed on the left side of the join, which effectively reduces the chance of memory overflow errors. //Further, you can use map ...

Servlet: 1. Concept 2. Steps 3. Executive Principle 4. Life cycle 5. Servlet 3.0 Annotation Configuration 6. Servlet architecture Servlet -- Interface | GenericServlet -- abstract class | HttpServlet -- abstract class * Generic Servl ...

mysql database learning collation Log in to the database Mysql-u username-p password Look at the database and note that it ends with a semicolonshow databases; # Display all databases (# is the symbol for mysql annotations) _____________________ ...

Based on lucene 8 1 Lucene Brief Introduction Lucene is an open source full-text search engine toolkit under apache. 1.1 Full-text Search Full-text retrieval is the process of creating index by participle and then performing search. Word segmentation is to divide a paragraph of text into words. Full-text retrieval divides a paragraph of text ...

RBAC Role-Based Access Control (RBAC) is a role-based access control framework. It is very convenient to manage privileges through user-role-privilege association. What is it? RBAC Please do it yourself. Baidu. Thank you for your support. If there are any mistakes in the article, please contact me or email me linjie.rd@gmail.com. A small gift ...

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1. Optimizing code Let's start with a little optimization of yesterday's code. Test methods written in test classes. If we write one test method at a time, we need to build factories or something, and there will be a lot of repetitive code.Modify the test method Mybatis Test public class MybatisTest { ...

Interceptor can help us to complete some unified checks of user status, request parameters, log records, etc. In SpringBook, we can inherit Handler Interceptor to implement our interceptor, and then simply configure it to make the interceptor effective. One additional interceptor We add a login int ...