Merge and split PDF documents in Java
When dealing with PDF documents, we can merge any group of several different PDF files or split a file into multiple sub files. This is convenient for document storage and management. The following will introduce the specific methods of PDF merging and splitting through Java program code.
tool
Free Spire.PDF for Java 2.0.0 (free version)
Not ...
Added by poppy on Sun, 08 Dec 2019 21:02:11 +0200
spring default boot location and contextConfigLocation settings for source resolution
Looking at the spring source these days, which covers where spring starts, let's see where spring actually started loading.This article uses spring3.0M3
The first spring load will go directly to the web.xml file with the help of a listener, ContextLoaderListener
<listener>
<listener-class>org.springframework.web.conte ...
Added by qazwsx on Sun, 08 Dec 2019 19:51:54 +0200
Python functions and operations
Bowen structureCustom functionVariable scopePython built-in functions
I. function
Functions in Python are collections of statements and expressions. There is no limit to the use of functions, just like other values in Python. For reusable code, you need to write a custom function for reuse.
Functions can be divided into nonparametric functio ...
Added by rubbertoad on Sun, 08 Dec 2019 19:43:06 +0200
jQuery date (age) select plug-in
Download address: https://www.helloweba.net/javascript/263.html
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>jQuery Date (birthday) selector</title>
<style>
</style>
<script type="text/javascript" src="jquery.js">< ...
Added by DaveLinger on Sun, 08 Dec 2019 14:34:52 +0200
Sharding-jdbc 4.0 usage
About sharding JDBC
Sharding JDBC is the first product of ShardingSphere and the predecessor of ShardingSphere. It is positioned as a lightweight Java framework that provides additional services in the JDBC layer of Java. It uses the client-side direct connection database to provide services in the form of jar package, without additional deploy ...
Added by fuji on Sun, 08 Dec 2019 14:14:08 +0200
Thread security -- synchronized
synchronized scope of action
Decorated code block: decorated scope is the code surrounded by braces, which acts on the called object
Decorated method: the decorated scope is the whole method, which acts on the calling object
Decorate static method: the scope of decoration is the whole static method, which acts on all objects
Modifier class: th ...
Added by bluetonic on Sun, 08 Dec 2019 12:40:35 +0200
springboot series four profile s multi environment configuration
Some configuration parameters during development and after going online are not available, such as database connection, SMS verification, etc
springboot provides us with a way to differentiate environment configuration
Different environment configurations for the same profile
Three bars can be used in the same configuration file application.yml ...
Added by Assorro on Sun, 08 Dec 2019 11:10:02 +0200
Use Requests and beautiful soup to crawl the girl map
Project Description:
Python novice, the first crawler project, web crawler is an activity that can enhance the interest of programming learning, so that Python learning is no longer boring.
Python version 3.7.2
Modules needed: requests, os, beautiful soup
Crawler destination https://www.mzitu.com/xinggan/
Project realization:
First, import the ...
Added by satheshf12000 on Sun, 08 Dec 2019 06:52:26 +0200
Django foundation Form component module
form component properties
Data validation function
Generate HTML code
Reference form component module
from django import forms #Introducing forms module
from django.forms import fields
data validation
Validation type
Data validation type
Data validation method
String validation
Fields.charfield (validation parameter ...
Added by Transwarp-Tim on Sun, 08 Dec 2019 03:46:48 +0200
Java - deep and shallow copy
Catalog
1. shallow copy
2. deep copy
The Object class provides clone(), which can be used only after the subclass implements the clonable interface. You can customize clone() in the class.
protected native Object clone() throws CloneNotSupportedException;
The Serializable and Cloneable interfaces do not have any methods, ...
Added by dimxasnewfrozen on Sat, 07 Dec 2019 10:31:59 +0200