Java

The recent project is doing background check, and the latter is basically the use of regular expression verification, this article to do some rough summary.1, string length:. {1,10}, note that there is a point before {}, which means matching all. ' {

First, write ExcelString path= "D:/zhangxinxin/files/excels/test.xls";Open FileFile File = new file (path);if (file.exists ()) {File.delete ();}Writableworkbook excelfile = workbook.createworkbook (file);Generate a worksheet named "first page",

Package Org.rui.thread.block2;import Java.util.concurrent.executorservice;import java.util.concurrent.Executors; Import Java.util.concurrent.timeunit;import Java.util.concurrent.locks.condition;import Java.util.concurrent.locks.lock;import java.util.

First, the recursive function, the popular saying is that the function itself calls itself ...such as: N!=n (n-1)!You define the function f (n) =nf (n-1)and f (n-1) is the function of this definition. This is recursion.Second, why use recursion: The

1 PackageCom.tem1.util;2 3 Importjava.text.ParsePosition;4 ImportJava.text.SimpleDateFormat;5 Importjava.util.Date;6 7 Public classIntervalutil {8 9 PublicString Getinterval (String createtime) {//The incoming time format must resemble the

Many simple interfaces are directly in the form of a URL,How to call?HttpClient Httpclient=null;Postmethod Post=null;try{HttpClient = new HttpClient ();Post = new Postmethod (Sendurl);Setting the Encoding methodPost.getparams (). Setparameter

JAVA 26th (multithreading (6)-Multi-producer and multi-consumer problems Multiple producers and consumers Take the production of steamed bread for example. Class Resource {private String name; private int count = 1; private boolean flag = false;

Java Design Pattern cainiao series (17) Bridge pattern modeling and implementation       Bridge: separates things from their specific implementations (abstraction and implementation decoupling) so that they can change independently. Assume that your

Spring framework: SpringMVC SpringMVC workflow. The first request is DispatcherServlet, which forwards the request to the Controller Based on the configuration file. The controller returns the view name and a Model to indicate the processing result.

Java Design Pattern cainiao series (16) prototype pattern modeling and implementation     Prototype: This mode uses an object as a Prototype to copy, clone, and generate a new object similar to the original object. Here, there are two types of

Tiny Spring Analysis 1Recently I have been thinking about the source code of spring, but the level is too low. The complex source code makes me feel dizzy.I am very lucky to see Huang Yihua's I think it is quite good. Based on his code, I wrote

4x4 matrix keyboard Scanner 4x4 matrix Keyboard Scan: 1. The GIO values of the 4 rows are set to Output, and the GIO values of the root columns are set to Input; 2. Set the GIO values of the four lines to 0111, 1011, 1101, and 1110 respectively.

Watermark scaling and input stream conversion Watermarks and zooming images: Public final static BufferedImage [] pressImage (InputStream srcImg, String waterImg, float alpha) throws IOException {// File file = new File (targetImg); Image image =

Use POI to operate images in different versions of Word documents and create Word documents We all know that the most common technology to use java for office operations should be POI. Here I will not talk about what POI is and how it is used. Let

Leetcode: Reverse Words in a String, leetcodereverse Given an input string, reverse the string word by word.For example,Given s = "the sky is blue",return "blue is sky the".click to show clarification.Clarification:What constitutes a word?A sequence

Two methods to determine whether a vertex is in any PolygonImport Determines whether the touch point is inside a polygon.Method 1. Mathematical Methods The advantage of this method is that any platform can be used, not only for

Core Ajax objects-Quick Start With XmlHttpRequestIntroduction: For non-TGB instances, skip this step ...... After JQuery started school, the computer stopped for a while. When I got bored one day, I took my BS stuff and looked at it again. I found

Struts2 no extension Many of struts2's friends want to modify or remove the action extension. This article helps you implement Struts2-core-2.3.16.jar,: http://repo1.maven.org/maven2/org/apache/struts/struts2-core/2.3.16/ Org. apache.

Search and replace strings Search for the target string in the string and replace it with the specified string. The number of replacement times is returned. The interface is Int find_str_replace (char * & str, const char * find_str, const char *

Java Decorator Mode In Java, many classes in the I/O package are the embodiment of the typical modifier mode, such: NewBufferedOutputStream (OutputStream out) NewBufferedInputStream (InputStream in ); NewPrintWriter (OutputStream