Programming VIP

Stream jdk8 adds a new feature of Stream, which can run or calculate the data in the data source. Note: Array | set can be used as the data source for storing data. Stream cannot store data. It can only calculate the data in the data source to get a new result or a new streamstream does not affect the data in the data sourcestream is disposa ...

Spring MVC requests and responses 1, Response of spring MVC The data response methods of spring MVC are as follows: Page Jump Return string directlyReturn via ModelAndView object Write back data Return string directlyReturns an object or collection 1. Page Jump 1.1. Directly return string In the code for getting ...

1, Overview Using jar package https://mvnrepository.com/artifact/commons-io/commons-io https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload Precautions for file upload In order to ensure the security of the server, the uploaded files should be placed in a directory that cannot be directly accessed by the outside world, su ...

Write in front🛫 For more information, see SpringBoot 2 column 🚕 This article summarizes the video of Raytheon in Silicon Valley 🚒 Bloggers are still learning this knowledge 🚄 If you find any problems, please point them out 🚀🚀Zhawatai zaogao's blog home page🚀🚀 1 configuration file    as mentioned before, configuration f ...

Updating entities using spring data JPA SpringDataJPA has a built-in save method to save and update the entity content. If there is a primary key value, the row information of the corresponding primary key will be updated. On the contrary, a new information will be added, which is similar to the saveOrUpdate method of Hibernate. Let's create a ...

Original link https://www.cnblogs.com/jinyujia/p/15697183.html Basics 1. What is the relationship between JDK, JRE and JVM? What is a JVM? English name (Java Virtual Machine )，namely JAVA Virtual machine, which only recognizes .class Type file, it Be able to class The bytecode instruction in the file is recognized and the upward ope ...

1. Method of adding, deleting, modifying and querying JDBC 1, Statement: an object used to execute a static SQL statement and return the results generated by it (if there are disadvantages, generally do not use it, just understand it). The disadvantages do not completely represent errors, but are a little troublesome or strange Disadvantage 1 ...

Basic definition and use of method 1. Concept of method Method: method, also known as function, is an orderly combination of codes used to solve a class of problems. It is a functional module. (personal popular understanding is like a data processing tool. Put the original data into it for processing, and then get the results I want.) 2 ...

JavaWeb 1. Basic concepts web development Static web html cssProvide it to everyone to see that the data will never change Dynamic web Taobao is almost all websites The data provided to everyone will change, and everyone will see different information at different times and places Stack technology; Servlet/JSP ,ASP,PHP, In ...

Spring MVC overview Spring MVC is a module in the spring framework and one of the cores of spring. It is often used for web development. Its bottom layer is Servlet, so it is also called Spring web mvc. Because the internal architecture pattern is mvc architecture, it is called Spring MVC Spring MVC is a container that manages the controlle ...