jsp

问题 Inside our application, we are randomly getting below issue while submitting requests. (occuring in different pages). On request submission,page suddenly goes blank. We have multiple dropdowns in Jsp page. On selecting some of the drop-down , form submission happens to populate other dropdowns. We found that new modelandview is returned from controller, but page goes blank. When we refresh the url, application is available again. Weird thing is , it doesn't not occur always even for same

问题 What's the best way to store a variable that can be used throughout a .JSP website? I have a keycode that is a bunch of numbers keycode = XXXXXXXXXXXXXXXXXXXXX and I want to be able to access that code in various pages while having the keycode live in one location. The variable doesn't change often but I'd like to be able to just swap it out in one place and not everywhere it's referenced. 回答1: To store a variable in application scope, you should save it as an attribute in ServletContext. You

问题 What's the best way to store a variable that can be used throughout a .JSP website? I have a keycode that is a bunch of numbers keycode = XXXXXXXXXXXXXXXXXXXXX and I want to be able to access that code in various pages while having the keycode live in one location. The variable doesn't change often but I'd like to be able to just swap it out in one place and not everywhere it's referenced. 回答1: To store a variable in application scope, you should save it as an attribute in ServletContext. You

问题 I am getting this error *org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this applicationj I do have the javax.servlet.jsp.jstl-1.2.1.jar and the javax.servlet.jsp.jstl-api-1.2.1.jar in the WEB-INF/lib folder . Below is the taglib import in JSP . taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" 来源： https://stackoverflow

问题 I am trying to upload list of files to the server using spring MVC. But i am able to store on to the c drive,but i don't know how to upload onto server.Please help me. 回答1: create a folder inside the Tomcat 9 (server) directory as follows .../Apache Software Foundation/Tomcat 9/FileUpload then, you can access the above directory (FileUpload) in java File fileUpload = new File(System.getProperty("catalina.base"), "FileUpload"); but, if you use the eclipse ide, in the development time you

问题 I am trying to upload list of files to the server using spring MVC. But i am able to store on to the c drive,but i don't know how to upload onto server.Please help me. 回答1: create a folder inside the Tomcat 9 (server) directory as follows .../Apache Software Foundation/Tomcat 9/FileUpload then, you can access the above directory (FileUpload) in java File fileUpload = new File(System.getProperty("catalina.base"), "FileUpload"); but, if you use the eclipse ide, in the development time you

问题 In PHP there is the die("some message"); to write output and stop the execution of the script. So is there an equivalent in Spring mvc ( in Controller and in the JSP ) ? 回答1: There is no reason to have something like die() in Java/JSPs. JSPs should be used as a pure view technology. It should just generate HTML. Not try to access a database, read files or whatnot. That is the job of a controller, written in Java Use System.exit(0); to exit the java code. Keep a note this will stop the JVM

问题 I am trying to execute results from my stored procedure and it is not displaying anything. I have played around with sql syntax query and nothing worked...when I do a normal select statement I get results from my tables, but so far nothing worked with my stored procedure...what am I not getting results ? I am using sql-server by the way <% Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); String url = "jdbc:sqlserver://...."; String username = "something"; String password =

问题 I have a simple jsp page that is trying to access another jsp file from another server <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <c:import url="http://our-other-server.com/header.jsp"></c:import> As it's our sensitive QA site it's password protected from the server, can I add the username and password as parameters to ? It's a tomcat server where the other site exists. Without the credentials it throws a 500 error of course 回答1: If your environment uses HTTP Basic

问题 This is my first time using Jquery Ajax. The context is that, i'm trying to display more than 10000 rows of data on Datatable, what i did previously was just to use my servlet to forward my Arraylist of data to the JSP, then loop through and display the data onto display data. It was taking too much to load the datatables. So i decided that i want to try to use Jquery Ajax to see if that will help the issue. I'm currently facing some issues implementing it, can anyone help me? I'm using GSON