Recent questions tagged JSP

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jsp - java.lang.RuntimeException Cannot find FacesContext

I don't know how to continue, but I always get the "java.lang.RuntimeException: Cannot find FacesContext" for my ... > What am I missing here? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - How to use scriptlet inside javascript

Can someone test this example and share the results? http://timothypowell.net/blog/?p=23 When I do: ... .com/showthread.php?t=172082 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - Display Pdf in browser using java servlet

I have pdf file in my application. I need to display the pdf in browser. I am reading the file as a ... printStackTrace(); } return bos; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - List<Foo> as form backing object using Spring 3 MVC, correct syntax?

I want to do something like this, where Foo is a class with one String field name, and getter/setter: <form:form id= ... Model model) { // ... } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - Java HttpServletRequest get URL in browsers URL bar

So I'm trying to grab the current URL of the page using Java's request object. I've been using request. ... knows is only a servlet wrapper. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - Check a collection size with JSTL

How can I check the size of a collection with JSTL? Something like: <c:if test="${companies.size() > 0}"> </c:if> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - How to get value of bean property when property name itself is a dynamic variable

I'm trying to write a custom JSPX tag that reads the value of a given bean property from each object in a ... .FooBar' Thanks for any help. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - How to configure welcome file list in web.xml

I have this in my web.xml document. I am trying to have a welcome list so I dont need to type the path for ... url...How to do this correctly? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - How to set the JSTL variable value in javascript?

How to set the JSTL variable value in java script? <script> function function1() { var val1 = document.getElementById ... 'val1' (Java script)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - c:forEach throws javax.el.PropertyNotFoundException: Property 'foo' not found on type java.lang.String

My project is using hibernate 3.4.0 GA to access database, and Spring MVC 2.5.6 to handle web request and ... some one please help me? Thanks in advance Andrew Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - How to evaluate a scriptlet variable in EL?

I was wondering if there was anyway of using JSP in <c:if> statement. E.g. <c:if test="${ param. ... sticking in the clause, obviously it did not work. Thanks Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - How to use if-else option in JSTL

Is there an if-else tag available in JSTL? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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6.3k views

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jsp - How do you store Java objects in HttpSession?

So I am trying to get a servlet to add a Java object to the session of the user, when this servlet is ... .getAttribute("object"); Both ways still return null. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - Call Servlet and invoke Java code from JavaScript along with parameters

I have session key that is a JavaScript variable which I got from a REST API call. I need to call my Java ... . What JavaScript function can I use to do that? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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jsp - Will a 302 redirect maintain the referer string?

I need to redirect the user from one page to another, but I need to maintain the original referer string. ... behavior for 301 redirects is any more reliable? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - Iterate over elements of List and Map using JSTL <c:forEach> tag

If I have a JSF backing bean return an object of type ArrayList, I should be able to use <c:foreach> to ... over in JSP I'd be massively appreciative. Mark Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - How do I prevent people from doing XSS in Spring MVC?

What should I do to prevent XSS in Spring MVC? Right now I am just putting all places where ... specifying @RequestParam parameters on my controller methods. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - How to nest an EL expression in another EL expression

I'm writing JSP / JSTL, and I'm trying to iterate over several items in a database. I currently have three columns ... > Is there any way I can make this work? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - Calculate total sum of all numbers in c:forEach loop

I have a Java bean like this: class Person { int age; String name; } I'd like to iterate over ... row without resorting to scriptlet code, any suggestions? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - How to concatenate a String in EL?

How do I get the promoPrice variable to print as part of the string ONLY $4.67? <c:set var="promoPrice" value="4.67" ... ) ? "ONLY $${promoPrice}" : "FREE"}</p> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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jsp - How to access objects in EL expression language ${}

If I have a ArrayList<Person> persons How do I access it in EL? <c:foreach items="${what goes here??}" var="person">${person.title}</c:foreach> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - JasperException: The value for the useBean class attribute is invalid

org.apache.jasper.JasperException: /index.jsp(1,1) The value for the useBean class attribute com.b5 is ... explain the cause and solution of this problem? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - Upload multiple files at once to a Struts2 @Action

I need to upload "1000 files" or "a zip file including all the files" at once using Struts2. (By 1000 Files or ... ); } } Output in upload 1 in upload 2 Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - Java error: Only a type can be imported. XYZ resolves to a package

I get the error: "Only a type can be imported. XYZ resolves to a package." Someone has ... .eresearch.knowledgeportal.model.Category resolves to a package Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - There is no Action mapped for namespace [/] and action name [login] associated with context path [/Struts2Test]

I'm a beginner of Struts2, I know this question been asked in here much times, but I tried to solve it and ... no idea, any suggestions or tips are welcome... Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsp - How to compare two object variables in EL expression language?

I am creating a drop down list of all languages. The default language selection for the list will be determined by ... two strings in EL? The J2EE 1.4 Tutorial Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.7k views

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jsp - Evaluate empty or null JSTL c tags

How can I validate if a String is null or empty using the c tags of JSTL? I have a variable of name var1 and ... it is null or empty (my values are strings). Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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992 views

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jsp - Collect and save submitted values of multiple dynamic HTML inputs back in servlet

I am able to display an ArrayList of beans in a JSP form using JSTL by looping through the list and ... in the appropriate item of the the ArrayList? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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