This article mainly describes how to prevent a Web page from refreshing duplicate submissions and how to prevent backward solutions, specific as follows:
Disable the Submit button after submission (most people do this)
What if the customer submits
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99 multiplication Table
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The above is a small series for everyone to bring the JSP output 99 multiplication table Simple examples of all the content, I hope that we support cloud Habitat Community ~
Export the data from the JSP page to the Excel table, which is for informational purposes only. (the "Graduate Information Inquiry" project written in the Junior training program)
1. Generate Excel Templates
1 Create a new Excel file (template. xls),
Recently do a project, in writing backstage, encountered a problem, first in the JSP introduced Bootstrap and Bootstrap-validator (form verification), encountered a problem, is in the runtime, the error
You are prompted to write JS, there is no
In the previous version of MyEclipse 9, we would do this if we were to add an automatic code hint to the HTML editor: Windows-->preferences-->myeclipse-->files andeditors-- >html-->html source-->content Assist on the right in prompt when this
JS Now you are writing the JSP to become a class definition. All the scriptlets you write will be placed into one of the methods of this class. Again, you can add variables and methods to declare them in this class. Of course, you can also use these
The origin of the problem
Not long ago done a JSP to generate a PDF report of the small project, it is an open vision. Some of the enterprise information through the network to form an HTML report, although IE can directly print the contents of the
Using a JSP to connect to a database is not so easy, it is normal to connect to SQL Server 2008 using pure Java, but always error classnotfoundexception when using JSP calls. Very depressed jar driver package that's the way it is.
(x) CSDN
In the nine built-in objects, I think the most used is out.println and response.setintheader, today just wrote a server response code, also always these two error. Please see the picture for details.First of all, the Response.setintheader error,
Resolves the jsp load success. org.apache.tomcat.embed tomcat-embed-jasper provided-->!--Fix JSP in time org.springframework springloaded at the bottom of the plugin org.springframework.boot spring-boot-devtools true runtime
Error in JSP project:Javax.servlet.jsp.PageContext cannot is resolved to a typeSolution found on stack overflow:You'll need to import in your project the JSP APIs, which is not included in Servlet-apiIn my project, the solution isDependency>
Scene: With IntelliJ idea launch Springboot project Access appeared 404, very skin, because I use eclipse development is normal, look for a long time, what add comment off provided And nothing to use, I think is the idea when the start, directly
Jspan Implicit objectJSP implicit objects are the Java objects that the JSP container provides for each page, and developers can use them directly without explicitly declaring them. The JSP implicit object is also known as a pre-defined variable.The
JspFilter FiltersThe filters in Servlets and JSPs are Java classes, and they exist for the following purposes:
Intercept the backend resource when it is requested to access it
Manage responses returned to clients from the server
A
Implement a simple calculator program that requires: Use the Jsp+javabean mode implementation.The project source code is as follows:Files: calculator.jsp Simple Computer calculation result: ${cal.firstnum} ${cal.operator}
Let's first look at such an application of the project.
What should we do if we want to introduce scripts and files in CSS packages in index. jsp to avoid complicated relative paths,Companies generally adopt absolute paths.Code:
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