Java
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Talk about setting codes for JAXB and response to solve wechat4j Chinese garbled code
If there is a little partner as a programmer who says he has not encountered the problem of Chinese garbled code, I do…… -
Java uses JDBC technology to operate SQLSERVER database instance code
JDBC (Java Data Base Connectivity) is a Java API used to execute SQL statements. It can provide unified access to a va…… -
Spring dynamic multi data source configuration instance demo
Recently, many people have consulted spring on how to configure multiple data sources, so it is troublesome to answer …… -
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Spring MVC file upload and download examples
Upload and download spring MVC files as follows: (1) Import jar package: ant jar、commons-fileupload. jar、connom-io. …… -
Code example of sending mail based on SSM framework + JavaMail
This article introduces the JavaMail application based on the combination of SSM framework (spring 4.0 + spring MVC + …… -
The difference between string class and StringBuffer class in Java
There are two string operations in Java: String class and StringBuffer class (buffer string processing class). Let's b…… -
Java implementation of the method of counting the number of characters and substrings in a string
This paper describes the method of Java to count the number of characters and substrings in a string. Share with you f…… -
Perfectly solve the problem of outputting Chinese garbled code in servlet
As follows: The above article perfectly solves the problem of outputting Chinese garbled code in servlet, which is all…… -
Java uses JDBC to insert 10W pieces of data into MySQL database batch (test efficiency)
How to improve the efficiency when using JDBC to connect to MySQL database for data insertion, especially the continuo…… -
Java value passing and reference passing
When an object is passed as a parameter to a method, the method can change the properties of the object and return the…… -
Java file into byte array knowledge summary and example explanation
Java converts files into byte arrays Keywords: file, file stream, byte stream, byte array, binary Absrtact: the demand…… -
Simple method of file download with Servlet
This paper describes the method of simple file download with servlet. Share with you for your reference, as follows: I…… -
Java method for reading TXT file
Java reads the contents of TXT file. It can be understood as follows: The above is the whole content of this article. …… -
Detailed explanation of several implementation methods of converting Java list into string array
Convert Java list to string array Implementation code: or Thank you for reading, hope to help you, thank you for your …… -
JavaMail Getting Started tutorial receiving mail (4)
In the third part of the previous introduction to JavaMail, we learned how to send mail using the transport class prov…… -
Java export method for generating CSV file
First of all, we need to have a basic understanding of CSV files. CSV files are similar to excel and can be opened wit…… -
Comparison of several methods for judging the same elements in HashMap, HashSet, treemap and TreeSet in Java
Comparison of several methods for judging the same elements in HashMap, HashSet, treemap and TreeSet in Java 1.1 HashM…… -
Facade of Java design pattern
summary External and internal subsystems must communicate through a unified appearance mode object, that is, appearanc…… -
Instance method of java image clipping and thumbnail generation
1、 Thumbnail When browsing the album, you may need to generate corresponding thumbnails. Direct code: Directly run th…… -
JDBC addition, deletion, modification, query and unique complete code analysis
Part I code (entity class) Part II BaseDao (addition, deletion, modification, query and unique query) Part III hehedao…… -
Java class loading and custom class loader
Class loading All class loaders are subclasses of classloader. Class loaders always start with Class runs in the direc…… -
Perfectly solve the problem of lazy thread safety in singleton design mode
First, write a single example: Write a test class: The running result is always true, indicating that there is no prob…… -
Detailed explanation of source command under Linux
Analysis of execution mode of Linux source command and script When I modify the / etc / profile file, I want it to tak…… -
Java uses POI to obtain the number of columns and rows in Excel
preface Report output is often involved in Java application development, while general reports often lack universality…… -
Summary of 35 methods of performance optimization in Java
preface For programmers, code optimization is a very important topic. Some people may think it's useless. What can be …… -
Summary of Java methods for processing date and time
1、 Java util. Calendar introduction The calendar class is an abstract class that is associated with a set of events s…… -
Java solves the problem that byte 2 of UTF-8 sequence with exception 2 bytes is invalid
Java solves the problem that byte 2 of UTF-8 sequence with exception 2 bytes is invalid In a recent project, I encount…… -
Detailed explanation of flow object selection law in Java programming
Examples are as follows: The above is a detailed explanation of the flow object selection law in Java programming brou…… -
Example of data transfer using JSON in Java
Recently, I was working on the development of a web application based on java servlet and the corresponding anroid app…… -
Explain the five ways to let you read the contents of the properties file in Java is no longer a problem
1、 Background Recently, in the process of project development, some custom variables need to be defined in the proper…… -
How to implement ArrayList and HashMap by themselves
ArrayList and HashMap The storage of ArrayList is an array, The storage of HashMap is an array plus a linked list, The……