Java

SpringMVC multi-File Upload instance Background Conroller Import java. io. file; import java. io. fileInputStream; import java. io. fileOutputStream; import java. io. IOException; import java. io. printWriter; import java. io.

Spring property Injection Method Spring has three types of property injection: 1. setter Injection 2. constructor Injection 3. annotation injection: ① Java annotation ② spring annitation Java annotation in the third type is the recommended

Optimization of Singleton mode analysis codeThe Singleton mode is one of the 23 design patterns and is a relatively simple design pattern. It aims to return the same object no matter how many calls, it features privatization of constructors. It can

Method Search in rubyMethod calls in ruby are in the form of objects. Methods. How can an object find this method? First, you must understand the concept of the ancestor chain. The ancestor chain starts from a class to its parent class, and then to

Design Mode-adapter ModeThe adapter mode defines two incompatible classes to be used together. It is a structural mode and requires Adapee and Adaptor ). why do we often encounter the problem of combining two unrelated classes? The first solution is

Fuzzy search of stored procedures and sorting by matching rateThere is a search function in the recent project. In this case, you can simply do the search, and you can simply like the percent sign. But after thinking about it, I had to do something

Configure maven and spring This blog is mainly about maven and spring configuration management. maven is used to manage spring dependency packages. This article is original, reproduced please indicate to:

Servlet Learning (1) 1. Servlet is a technology provided by sun for developing dynamic web resources. 2. Servlet location in web applications: 3. Create a Servlet in three ways:(1) Implement the servlet Interface (2) InheritanceGenericServlet,

Design Pattern bridgingBridge Pattern) It is also called the bridge mode. Separate the abstract part from its implementation part so that they can all change independently. In home life, everyone has used electric lights. switches and electric

Netty source code simple analysis 1 I briefly read the source code of netty5 over the weekend. I only understood the rough idea and recorded the results so that I can recall it next time. Server code: public void run() throws Exception {

Integer formatting in Java Integer formatting in Java 1. Description Format the integer: % [index $] [ID] [minimum width] Conversion Method 2. instance analysis (1) Source Code /*** 1. format the integer: % [index $] [ID] [minimum width]

Tree and binary treeA tree is an important non-linear data structure defined by the hierarchy defined by the branch relationship: the tree is a finite set T of n (n> = 0) nodes, where: when n = 0 is null tree n> 0, there is only one specific node,

Send an HTTP request and obtain an HTTP response. The process of sending an HTTP request and obtaining an HTTP response is as follows: (1) define HTTP requests such as HttpPut (HttpPost/HttpGet/HttpDelete; (2) define various headers and add them to

Configure solr for jetty 1. Download jetty8 from the jetty official website. 2. decompress the file and copy the solr directory (index file and configuration) in the solr4.8 directory to the jetty8 root directory. 3. Decompress solr. war under

Design Mode Reading Notes (5)-Comparison of Three factory Modes First look at the main code of the three factory models (the complete code is in the first three blogs ): Simple factory mode: public class SampleFactory{public static Animal

Common Regular Expressions Verification number: ^ [0-9] * $ verify the n-digit number: ^ \ d {n} $ verify the number of at least n digits: ^ \ d {n ,} $ verify m-n digits: ^ \ d {m, n} $ verify digits starting with zero or zero: ^ (0 | [1-9] [0-9] *)

Spring Source code reading: Design and Implementation of IOC containers (2) -- ApplicationContextWhy is ApplicationContext recommended in Spring reference documents? What benefits does it bring to our applications? As one of BeanFactory

Programming Skills-table-driven programming/* Image format-dependent operations. */typedef struct {jas_image_t * (* decode) (jas_stream_t * in, char * opts);/* Decode image data from a stream. */int (* encode) (jas_image_t * image, jas_stream_t *

Simple addition, deletion, modification, and query using JDBC (take MySQL as an example), jdbcmysql Directory JDBC I. Preparations (I): MySQL installation configuration and basic learning 2. Preparation (2): Download and import the jar package

Sort (select, Hill, binary insert), and Hill binary insert Select sorting method 1st times, pending sorting records r [1] ~ Select the smallest record from r [n] and exchange it with r [1]. For example, 2nd rows, in the record to be sorted, r [2] ~