Java
-
Solve the problem of install new software in MyEclipse
Click Help in eclipse to directly find the install new software option to install plug-ins, but help does not have thi…… -
Solve org hibernate. exception. SQLGrammarException:could not insert
Today, I encountered this error when building a project using hibernate. I haven't found the reason for the error for …… -
struts2_ Struts type conversion
I In the servlet, the non string type submitted by the form needs to be converted manually 1. In struts, the commo…… -
Java_ Folder splitting and merging
I Idea: 1. Document cutting: The class RandomAccessFile is used, in which the method seek can customize the readin…… -
Java_ Queue interface
Queue interface 1. english A) queue B) deque, double Ender queue 2. Queue interface In addition to the basic c…… -
Java_ Collections tool class
Collections tool class * differences between collections and collections Collection interface (the implementation inte…… -
struts2_ struts. Explanation of XML configuration file
1.bean Bean detailed explanation: https://www.cnblogs.com/lulu638/p/4340703.html 2.constant Constant attribute configu…… -
JSTL_ Format tag library
JSTL_ Format 1： JSTL format tag library <%@taglib uri=” http://java.sun.com/jsp/jstl/fmt ” prefix=”fmt”%> 2： F…… -
Java connection to MySQL database
Several methods of Java connecting to database *Explain 1. Take MySQL database as an example 2. There are fo…… -
java_ How custom labels work
I How custom labels work: Web server JSP 3 When a custom tag is encountered, first instantiate the tag processor class…… -
JSTL_ XML tag library
JSTL_ XML 1： Explain 2： XML tag library The main function of XML tag library is to provide convenient support for op…… -
java_ Custom tag, my first custom tag!
Custom tag, my first custom tag! There are two steps altogether I case Output client IP ViewIP. jsp -
Java Web Series: Fundamentals of Java Web projects
1. Java web module structure JSP files are similar to axpx files. Paths and URLs correspond to each other one by one a…… -
Basic use of Java enumeration classes
Enum type is a new feature in Java 5. It is a new type that allows constants to represent specific data fragments, and…… -
Java Web Series: JDBC Foundation
ADO. Net in Java is the enterprise library dataaccessapplicationblock module, the module in Java, and the orm of entit…… -
Java Web Series: JAAS authentication and authorization Foundation
1. Overview of certification and authorization (1) Authentication: authenticates the user's identity. . Net based RBS …… -
Detailed summary of transaction in Java
< H4 id = "1 what is a Java transaction" > < span style = "color: #3366ff;" > 1. What is a Java transactio…… -
JAVA Chinese garbled code
1. In MyEclipse, you can set the file encoding format, but when we use scanner to type, because Windows uses GBK encod…… -
Java development_ Eclipse is exported as a war file and hot deployed to Tomcat to run the summary
In MyEclipse, we can easily do this step: generate a war file from a web project In fact, in eclipse, it is also very …… -
Hadoop 2-mapreduce details
This article is about Hadoop 2 MapReduce version 2.0 will be explained in detail. Please pay attention to the version,…… -
Java development_ Imitate Baidu Library_ OpenOffice2PDF_ Source download
I've been studying and imitating things similar to Baidu Library these days. Here I'll share with you what I've done m…… -
String objects can be assigned with “=” or “new”. What is the difference between the two methods?
When you see the title, you may subconsciously think about the difference between the two methods? Take a look at the …… -
Java development_ The difference between ” and null
I have a problem at work today: In the code: The following is the difference between null and '' in Java: -
Java interview questions_ Good things to share with you
There are many online yes, you can look at the interview Manual of IT company. Java interview questions spring inter…… -
Maven study notes
Study notes Select apache-maven-3.3 9-bin. Zip download and unzip. Configure environment variable: create a new enviro…… -
A pen test question
Today, I went to an interview with a foreign-funded company and encountered a test question The topic is as follows: H…… -
Maven’s first applet
Here is the first applet about Maven About Maven installation: First look at the directory structure: This is the orig…… -
Get the image file(s) some informations,Including the Make,Model,Date/Time,etc
This is a blog about how to get the image file(s) some informations. Including the Make,Model,Date/Tiime,etc. while,ho…… -
Java drawing program_ The picture is drawn with letters
Recently, I have been studying how to "draw" pictures with letters in text editing tools. You may not know what I want…… -
Lucene (full text search)_ Indexing_ Full text search by keyword_ Source download
： ： Add these two jar packages to the project build path Look at the project structure -
Java development_ Conversion of numbers to capitalization of RMB in Chinese_ Full version
This application comes from a sudden idea: see that the number on the invoice should be converted into the capital of ……