Recent Posts
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Servlet download file implementation code details (V)
This example shares the specific code of servlet download file for your reference. The specific contents are as follow…… -
Java API of HBase access mode
Access mode of HBase 1. Native Java API: the most conventional and efficient access method; 2. HBase shell: the comman…… -
Spring boot + drools rule engine integration details
objective Most of the official drools examples are based on pure Java projects or Maven projects, while few are based …… -
Solve problems encountered in Java wrapper class comparison
preface This article mainly introduces the solutions to some problems encountered in the comparison of Java packaging …… -
Java is a simple instance of reading and outputting from a file
Input with scanner and output with printstream Function: from in Txt read in and output to out txt code: Same as below…… -
Usage of mongodb in spring boot project
preface As we all know, MySQL database is easy to use, but the amount of data is more than ten million. It is very pai…… -
An in-depth analysis of the advantages of HBase
HBase is a NoSQL database running on Hadoop. It is a distributed and scalable big data warehouse. In other words, HBas…… -
Comparison of two object attributes based on Java
There are two ways to compare two objects: 1. Case 1: when you just judge whether two objects are equal, you just need…… -
DES encryption and decryption tool class instance implemented in Java
This article describes the DES encryption and decryption tool class implemented in Java. Share with you for your refer…… -
On Java fork / join parallel framework
Preliminary understanding of fork / join framework Fork / join framework is a parallel task framework added to java7. …… -
Maven configuration in windows and project creation instance in IDE
Maven configuration under Windows 1. Maven download address: http://maven.apache.org/download.cgi , download the versi…… -
Implementation method of eclipse automatic prompt and automatic completion function
Solve the automatic prompt problem of code: 1. Open eclipse - > window - > preferences 2. Find the content assis…… -
Struts 2 realizes projection through ognl expression
Projection: as the saying goes, it is filtering, that is, the filter filters out the qualified ones struts. xml: OgnlA…… -
On guard thread and user thread in Java
Java threads are divided into two types: daemon threads and user threads (user thread), the main function will be call…… -
Struts 2 configuration static resource code details
The struts 2 framework has two core configuration files: struts XML and struts 2 default properties file default Prope…… -
Detailed explanation of Java enumeration usage
In actual programming, there are often such "data sets", their values are stable in the program, and the elements in t…… -
Graphic tutorial for building Java runtime environment
1. Build a Java running environment. For beginners, you can mainly download and install JDK, and the windows operating…… -
Explain the essential difference and relationship between hashcode () and equals ()
In the process of learning Java and making examples according to videos, I have a deeper understanding of the two meth…… -
Summary of commonly used hash algorithms in Java [classic examples]
This paper describes the commonly used hash algorithms in Java. Share with you for your reference, as follows: For mor…… -
Struts 2 static resource mapping code example
In the struts 2 framework, there are some common static content that it needs, such as JS files and some CSS files. Wh…… -
Thoughts on Java enterprise project development
What is enterprise project development "Enterprise level project", enterprise level project development, and Java is a…… -
Explain the implementation mechanism of spring MVC dispatchservlet in detail
In spring, contextloaderlistener is just an auxiliary class. When the web container starts, it finds and creates a web…… -
Implementation method of spring boot after starting the project
preface We sometimes do other things (such as importing data scripts) after the web project is started. Let's talk abo…… -
Detailed explanation of Java data overflow code
Java is a relatively safe language, so how does it handle data overflow? Look at a piece of code, The result of the ru…… -
Spring and mybatis integration profile
Recently, because the project requires the integration of Spring + mybatis architecture for project development, the r…… -
Java takes methods as parameters — instances of polymorphism
When studying the intelligent algorithm in the previous paragraph, I found that if it is implemented in Java, the spec…… -
In mybatis analysis
When using mybatis, our SQL is written in the XML Mapping file. If there are some special characters in the written SQ…… -
Struts 2 method of realizing permission control through custom tags
Recently, I encountered a demand in development: whether to display an operation button according to the user's permis…… -
An example of how Java uses regular expressions to get sub text
This article illustrates how Java uses regular expressions to get sub text. Share with you for your reference, as foll…… -
Java non blocking I / O usage
Most of the knowledge and examples come from O'Reilly's Java network programming, Fourth Edition, by elliotte rusty Ha…… -
Mybatis batch modification operation code
1. The modified field values are the same, but the IDs are different Collection: if it represents a type, it is writte…… -
Realization of positive film lamination effect in java image processing tutorial
preface This article mainly introduces the method of how to realize the positive film stacking effect by using Java, a……