Log on to the MiniBBS series (basic) by yourself

  User Logon method 1-full jsp Logical flowchart:   Login verification. jsp code: String username = request. getParameter ("username "); String password = request. getParameter ("password "); Class. forName ("sun. jdbc. odbc. JdbcOdbcDriver ");

Image buffering technology in JS

Java codeVar Imgvalue;Var Count = 13; // number of imagesVar Imgs = new Array (Count );Var ImgLoaded = 0; // Pre-load the imageFunction preLoadImgs (){Alert ('wait a moment before loading the image ......');For (var I = 0; I Imgs [I] = new Image

Settings of input radio

Settings of the radio type in the input control in htmlRadio contains attributes such as id, name, value, and checked.If you create multiple radio instances and want multiple radio instances to belong to the same group (that is, the single-choice

Sending Chinese via AJAX may cause garbled characters

When using POST:// If the transfer parameter is directly assigned, garbled characters are generated!Http_request.open ("POST", url, true );Http_request.setRequestHeader ('content-type', 'application/x-www-form-urlencoded; charset = gb2312

JSP page Jump Methods

1. response. sendredirdbms ("Jump to page "); This method modifies the http header to issue redirection instructions to the browser so that the browser displays the content of the redirected webpage. The request cannot pass the value. Run all the

Example of jsp implementation record access times

  It mainly records the access times and total access times of a single page. /// // Index. jsp ///////////////////////////////// Home Page 1 Integer count = (Integer) application. getAttribute ("count "); If (count = null ){ Count = 0; } %> 2

Jsp custom tag-3

  1. Tag case-developing anti-leech labels Leeching refers to the content that service providers do not provide services themselves. They use technical means to bypass the end user interfaces (such as advertisements) of other interests ), provide

Jsp uploads images for scaling

First look at the java code: Import java. io. File;Import javax. imageio. ImageIO;Import java. awt. Image;Import java. awt. geom. AffineTransform;Import java. awt. image. AffineTransformOp;Import java. awt. image. BufferedImage; Try { String

The simplest Demo of JSP file upload (such as image)

Request. setCharacterEncoding ("gb2312 "); Try {SmartUpload su = new SmartUpload (); // upload a file componentLong file_max_size = 4000000;Su. initialize (pageContext); // upload InitializationSu. upload ();// Save all uploaded files to the

Question about hyperlinks in jsp

There are the following situations:   customer evaluation-free standards   After submission, NO content of two hidden domains is found. The reason is simple and the scope is different. Therefore, the two hidden domains cannot be accessed by

Jsp and javaBean --- simple use of javaBean

Define a JavaBean (JavaBean is actually a simple java class) Javac-d./UserBean. java generate package file 01Package com. javaweb. ch07;02// A simple JavaBean example03Public class UserBean {04// User name attributes05Private String username;06//

Jsp form submission Array

Jsp form submission Array A1A2A3String [] aaa = request. getParameterValues ("aaa ");For (int I = 0; I Out. print (aaa [I] + " ");}%>   From dawn

Obtain a non-lan ip Address

[Java]/*** Obtain a non-lan ip Address** @ Return* @ Author SHANHY*/Public static String getPsdnIp (){String ipurl = "www.2cto.com ";String ss = null;HttpURLConnection urlConnection = null;Try {UrlConnection = null;Try {URL url = new URL (ipurl

Database Operations in JSP (1): MySQL database creation and management

Directory order: Install MySQL MySQL management software SQLYog Enterprise -- 30-day trial expiration Solution Use SQLYog Enterprise to create a database MySQL Parameters 1. Install MySQLDownload and install. Configure the user name and password

Unable to compile class for JSP decorator

The decorator is decorated with INDEX. JSP on the target page. Suddenly The error "Unable to compile class for JSP" is reported. [Java] String path = request. getContextPath ();String basePath = request. getScheme () + ": //" + request.

Jsp Path Problems

Solve the Path Problem in JSPIf "relative path" is used in JSP, problems may occur.Because the "relative path" in the webpage is relative to the "URL request address" to find resources.What does the above sentence mean?For example:Assume that we

Problems with assembling data into XML in JSP

1. Use the background JSP to obtain the List of requests in the Servlet and assemble the data in the List into XML. The following code is displayed as xml in Eclipse's built-in browser. [Java]/**** news Servlet * @ author Xu Yue **/public class

An example of Struts2 OGNL

Directory structure: the source code is provided below: ognl. jsp: [html] OGNL example Session and Request values request. materialName: session. materialName: display data based on conditions building materials whose prices are

Among the nine built-in objects of JSP (1). Servlet-related built-in objects: page, config

(1) Servlet-related built-in objects: page and config   Page: Object type, which is rarely used.   The page object represents the JSP page itself, just like the this keyword in Java. More accurately, it represents the Servlet after JSP is translated.

Batch delete in jsp

Submission page: NO. description Category diagnosis Frequency Int I = 0;String setcolor;Try{ResultSet rst1 = common. getCommon ("100 ");While (rst1.next ()){If (I % 2 = 0)Setcolor = "# ffffff ";ElseSetcolor = "# D9D9D9 ";%> ">

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