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Project members: Zhang Jinsheng Zhang ZhengRequirements Analysis:1. To carry out arithmetic;2. Calculation problem is random;3. Make a judgment of right and wrong;4. Integer operation.Program outline:1. Implement with JSP;2. Users can choose the number of topics;3. The answer page is listed in the form;4. Contains the input box to fill in the answer;5. After the answer, click Submit will directly show the correct error of the corresponding topic.Implementation process:The data structure mainly u

java.net.URLConnection; Import java.util.ArrayList; Import java.util.List; Import Java.util.regex.Matcher; Import Java.util.regex.Pattern; /*** * Java Crawl network picture * * @author swinglife * */public class Downloadpic {//code private static final String Ecodin G = "UTF-8"; Get the IMG tag regular private static final String Imgurl_reg = "]*?> "; Get the regular private static final String Imgsrc_reg = "http:\" for the SRC path? (.*?) (\ "|>

Web site Environment" article to demonstrate the installation, the installation process is relatively simple, as long as the configuration of the necessary environment, and then automatically installed up to completion. In this article, you will experience the installation of the Java environment, including the installation of PHP, MySQL and other PHP site requi

Sometimes we need to know some of the usage of the class, but do not know where to find the use of the example, or this example is difficult to find, we do not bother to look, then recommend a website to help us now.The website URL is as follows:http://www.programcreek.com/java-api-examples/We can enter the fully qualified name of a class, or the name of the class part. For example, search for "Java.nio.channels.FileChannel" or "FileChannel".What's ev

: Three large objects (lobs) to hold large graphics files or formatted text files, such as Word documents, and audio, video, and other non text files, the maximum length is 4GB. Halo Some data is stored inside the database. bfile: Large binary object files stored outside the database with a maximum length of 4GB, an external LOB type that records changes through the database, but the data is stored outside the database. Raw data types provided in Oracle: Raw (Long RAW: variable-length binary dat

Blog Source: http://www.fhadmin.org/webnewsdetail3.htmlFront Desk: Support Five sets of templates, can be switched in the backgroundSystem Introduction:1. The website backstage uses the mainstream SSM framework JSP JSTL, the website backstage uses the Freemaker static template engine to generate the HTML2. Because it is generated HTML, so the access speed, light, the server burden small3. The front-end of the website adopts the mainstream responsive layout, the same page supports PC, tablet, Mob

Public Static Booleanchecknonlicetcharacters (String string) { the BooleanFlag =true; the //No single quotes allowed - if(String! =NULL string.indexof ("'") > 0) { inFlag =false; the } the About returnFlag; the } the /** the * Prevent SQL injection + */ - Public Staticstring Getvalidsqlpara (String string) { the if(String = =NULL|| String.Length () = = 0) { Bay

In fact it is very simple, the method is as follows: Each step: Enter a https://www.xxx.com to start the site, the certificate to be imported to download over, Right >> properties >> Click "Certificate" on this page >> Click on the "Details" toggle bar above >> Then click the "Copy to File" button in the lower-right corner A Certificate Export Wizard dialog box pops up, and you can do it step-by-step by prompting. For example: Save As Abc.cer,

Project Address: http://www.freeteam.cn/ inside the station letter 1.1.1 Letter From the admin menu on the left, click Write to enter. Enter the recipient, title, content and click the Send button. 1.1.2 Inbox From the admin menu on the left, click Inbox to enter. View the message in the station Click on the title to view the details of the station letter. Delete the message in the station Select the message in the station and click the Delete button to complete the delete operation. In

Project Address: http://www.freeteam.cn/Inside the station letter1.1.1 LetterFrom the admin menu on the left, click Write to enter.Enter the recipient, title, content and click the Send button.1.1.2 InboxFrom the admin menu on the left, click Inbox to enter.View the message in the stationClick on the title to view the details of the station letter.Delete the message in the stationSelect the message in the station and click the Delete button to complete the delete operation.In order to prevent mi

This article mainly introduces the Java use Listener to achieve a statistical site online number of examples, with a certain reference value, there is a need for friends to understand. (1) Create a listener implementation class To roughly count the number of people online on a website, first, you can listen by Servletcontextlistener, and when the Web application context starts, add a list to the ServletCo