Category：JSP
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Time：2019-12-9
This paper mainly introduces four random operation problems, so that 30 random four operation problems can be generated automatically. Can generate four random calculation questions for primary school students, but there are still problems, primary school students! They don’t know negative numbers, they don’t know decimals. So we also need to add the judging conditions. […]
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Time：2019-12-7
There are two components to export excel from Java, one is JXL, the other is poi. I use POI here. Export is to generate files on the server and then download them. You can also use the output stream to pop up a dialog box in the web page to prompt the user to save […]
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Time：2019-12-6
This paper introduces the implementation of JS to display multiple guidebook effects on Baidu map at the same time, mainly taking the bicycle return location as an example. The specific code is as follows: Launch roadmap: < script type = “text / JavaScript” SRC = “http://api.map.baidu.com/api? V = 2.0 & AK = own AK” > […]
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Time：2019-12-5
In this paper, JavaScript is introduced in detail to implement the insertion sort and merge sort of linked list. The merge sort of linked list is to merge and sort each part, and then merge them together. 1. linked list 1.1 storage representation of linked list //Storage representation of linked list typedef int ElemType; typedef […]
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Time：2019-12-4
Recently, we have encountered many problems in our work. To summarize. The main function of this code is to forward a generated JSP page to PDF output to the page Need to use iText String HTML = servletutils. Forward (request, response, “/ WEB-INF / JSP / depot / print / JHD. JSP”); // forward the […]
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Time：2019-12-3
When inserting a data form with Chinese into MySQL database, such as insert into employee values (null, ‘Zhang San’, ‘female’, ‘1995-10-08’, ‘2015-11-12’, ‘sales’, 2000,’ is a good employee! ‘; in case of garbled code, you can use the statement show variables like’ character% ‘; to view the relevant coding set of the current database. From […]
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Time：2019-12-1
This paper introduces JSP programming technology to realize a simple shopping cart program, as follows: 1 problem description Using JSP programming technology to realize a simple shopping cart program, the specific requirements are as follows. (1) write a login page with JSP. The login information includes user name and password. Use two buttons to submit […]
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Time：2019-11-29
1, train of thought Paginate data query, and cache the setting progress (for the total data proportion of the currently fetched data points) 2. The interface progress bar is the asynchronous request cache proportion 3, code css: body{ position:relative; } .mask{ position:absolute; left:0px; top:0px; height:100%; width:100%; background-color: #eee; display:none; Filter: alpha (opacity = 50); / […]
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Time：2019-11-28
There is not much nonsense. The specific code is as follows: <span style=”font-size:14px;”> <%@ taglib prefix=”c” uri=”http://java.sun.com/jsp/jstl/core”%> <table width=”100%” border=”0″ cellspacing=”0″ cellpadding=”0″ > <tr> <th> Report name </th> </tr> < C: set var = “tempcount” value = “0” > < C: set var = “rowspancount” value = “0” > < C: set var = “tempfrist” […]
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Time：2019-11-27
JSP login verification, webpage login verification with verification code verification, add verification code to login function part_1:A class specially used to generate a verification code picture: verificationcode.java package cn.mike.javase.test; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.Random; import javax.imageio.ImageIO; import org.junit.Test; /** * […]
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Time：2019-11-26
Login verification demo of JSP part_1:Login.jsp: login page: <%@ page language=”java” import=”java.util.*” pageEncoding=”UTF-8″%> <% String path = request.getContextPath(); String basePath = request.getScheme() + “://” + request.getServerName() + “:” + request.getServerPort() + path + “/”; %> <!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”> <html> <head> <base href=”<%=basePath%>”> <title>My JSP ‘Login.jsp’ starting page</title> <meta http-equiv=”pragma” content=”no-cache”> <meta […]
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Time：2019-11-25
JSP login verification, webpage login verification with verification code verification, add verification code to login function Part 1: a class specially used to generate a verification code picture: verificationcode.java package cn.mike.javase.test; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.Random; import javax.imageio.ImageIO; import org.junit.Test; […]
