I want to print out every Item of my list "sorts" with Expression Language in a JSP File like that:
Try: Pizza-Margherita
Try: Cheese-Pizza
So it works if i use a normal expression like this
Try: ${sorts[0]}
Try: ${sorts[1]}
But i have to write it for every Item in the List
So I tried to use following two Loops:
<c:forEach items="${sorts}" var="item">
Try: ${item}<br>
</c:forEach>
<c:forEach var="item" items="${sorts}">
<td>
Try: <c:out value="${item}" />
</td>
</c:forEach>
It didn't work and I got this output each time:
Try:
Why won't my foreach loop work? what have I done wrong?
It is because you haven't included the core tag library in your JSP file.
You will do this by inserting following Line at the top of your file.
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
Here is sample JSP
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
</head>
<body>
<c:forEach var="item" items="${sorts}">
${item.name}
</c:forEach>
</body>
</html>
Here is Sample Java Code
List<Sort> sortList = new ArrayList<>();
Sort s1 = new Sort();
s1.setName("Pizza-Margherita");
Sort s2 = new Sort();
s2.setName("Cheese-Pizza");
sortList.add(s1);
sortList.add(s2);
request.setAttribute("sorts", sortList);
Sample Object class
public class Sort {
private String name;
//create getter and setter for name
}
Make sure you have imported JSTL Library.
Related
I wanted to insert html code to a jsp page so I used normal spring controller populated my model with html items, then once I start to render the data on the view ,it show the user a row html tags rather than an actual elements like:
<p> <strong> Description:</strong></p>
I wanted to show the user an actual strong text not the tag itself ,anyone knows how to achieve that?
my view is like that:
<%# page isELIgnored ="false" %>
<%# page contentType="text/html;charset=UTF-8" language="java" %>
<%#taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<body>
<c:out value="${Description}" escapeXml="false" />
</body>
</html>
any Idea how to solve it?
Edit : part of the code where I send the html :
model.addAttribute("Description", jobpost.getDescription()
.replace("<", "<")
.replace(">", ">")
.replace("&", "&")
.replace(""", "\"")
.replace("'", "\\"));
Edit 2 : it finally worked guys It was a problem with the above code I forgot to insert ; at the end of & lt;
You can try wrapping the field with <b> or <h2>tag
<%# page isELIgnored ="false" %>
<%# page contentType="text/html;charset=UTF-8" language="java" %>
<%#taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<body>
<b><c:out value="${Description}" escapeXml="false" /></b> // like this
</body><
/html>
Learning spring + jsp.
I am setting a model attribute in a method in a controller
#RequestMapping("/viewExpenses")
public String viewAllExpenses(Model model){
List<Expense> expenses;
expenses = expenseService.getAllExpenses();
model.addAttribute(expenses);
for(Expense e : expenses)
System.out.println(e);
return "viewExpenses";
}
where expenses size is > 1
Following is my jsp page:
<%# taglib prefix="s" uri="http://www.springframework.org/tags"%>
<%# taglib prefix="sf" uri="http://www.springframework.org/tags/form"%>
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Home Page</title>
</head>
<body>
<h2>
Hello ${user.firstName} <br> HOME
</h2>
<div>All Expenses</div>
<span style=""></span>
<c:forEach var="expense" items="${expenses}">
<c:out value="${expense.expenseId}"></c:out>
<c:out value="${expense.expenseName}"></c:out>
<c:out value="${expense.expenseType}"></c:out>
<c:out value="${expense.expensePrice}"></c:out>
<c:out value="${expense.purchaseDate}"></c:out>
<c:out value="${expense.expenseComments}"></c:out>
</c:forEach>
</body>
</html>
Following is my output from the jsp(no errors):
Hello Pravat
HOME
All Expenses
I wonder why the expenses are not populated in my jsp
You need to give your attribute an attribute name:
model.addAttribute("expenses", expenses);
Background:
When a name is not supplied, Spring uses a generated name which is not the same as the variable name. The docs explain this:
Determine the conventional variable name for the supplied Object based on its concrete type. The convention used is to return the uncapitalized short name of the Class, according to JavaBeans property naming rules: So, com.myapp.Product becomes product; com.myapp.MyProduct becomes myProduct; com.myapp.UKProduct becomes UKProduct.
Give it a name
model.addAttribute("expenses", expenses);
Return ModelAndView.
Always enclose body of if/for/etc into { } even it's single-lined.
in netbeans 7 and jdk 7 and everything is working fine without any changes i made in my environment the old tags are working fine of jstl ${class.get_name()}
${page.getTitle()}
the new once i introduce does not work, and i don't know why ?
see this simple application example i created added jstl 1.2 into the libraries
and still it does not work?
<%#page contentType="text/html" pageEncoding="UTF-8"%>
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1>Hello World!</h1>
<%
String var1;
var1 = "Welcome";
%>
normal : <%=var1%>
<hr />
dollar: ${var1}
</body>
</html>
First of all, the above page doesn't even use the JSTL. It uses the JSP EL.
And I assume you expect to see dollar: "Welcome" printed, but that won't happen, because the JSP EL doesn't print values of local variables. It prints the value of attributes.
Change your code to
<% pageContext.setAttribute("var1", "Welcome"); %>
or, better, to
<c:set var="var1" value="Welcome"/>
and you'll see the expected output.
Below is the code I have in index.jsp using jstl 1.2.
<%# taglib prefix = "c" uri="http://java.sun.com/jstl/core"%>
<% String[] setName = {"Hello", "you", "are", "using", "jstl", "in", "jsp"};
request.setAttribute("getName", setName);
%>
<html>
<body>
<table>
<tr><td>Print</td></tr>
<c:forEach var="itemName" items="#{getName}" >
<tr>
<td>${itemName}</td>
</tr>
</c:forEach>
</table>
</body>
</html>
The output I was expecting is as below
Print
Hello
you
are
using
jstl
in
jsp
However below is what I am getting
Print
#{name}
Please let me know where I am missing
Below is the only jar file I have in WEB-INF/lib folder
jstl-1.2.jar
Thanks in advance
Fahim
Note: Adding Java and JSP tag as person who have knowledge of Java and JSP might be knowing JSTL too...
Here,
<%# taglib prefix = "c" uri="http://java.sun.com/jstl/core"%>
You're specifying the wrong JSTL taglib URL. This one is for JSTL 1.0. After JSTL 1.1 it requires a /jsp in the path. See also the JSTL 1.1 tag library documentation.
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
As to the of the code (and to reply on all those duplicate answers complaining to use ${} instead), the #{} syntax will only work inside JSP when you're targeting a Servlet 2.5 / 2.1 compatible container with a web.xml conforming Servlet 2.5 spec. Tomcat 6.0 is an example of such a container. The #{} will indeed not work in JSP tags on older containers such as Tomcat 5.5 or older.
For clarity and to avoid confusion among starters, better use ${} all the time in JSP tags. Also better use self-documenting variable names.
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String[] names = {"Hello", "you", "are", "using", "jstl", "in", "jsp"};
request.setAttribute("names", names);
%>
<!DOCTYPE html>
<html lang="en">
<head>
<title>JSTL demo</title>
</head>
<body>
<table>
<tr><td>Print</td></tr>
<c:forEach items="${names}" var="name">
<tr><td>${name}</td></tr>
</c:forEach>
</table>
</body>
</html>
See also:
Our JSTL wiki page
Difference between JSP EL, JSF EL and Unified EL
In JSTL 1.2, you don't want to use #{name} in pure JSP, that's only a JSF artifact. Instead, simply use ${name}.
You need to refer items using expression language like ${name}
U r using # instead of $ before name
Let me know if this resolves.
#{name} is not a valid Java variable reference - looks like you are confusing it with JQuery selector.
Anyways try just using items="${name}"
#{name} is should be like ${name}
oh! might be the jars related to JSTL. check thins link for those jars to include in your project
Below is the final code I am using and it is running...
Posting so that someone can use it... Might help me tomorrow ;)
<%# page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<% String[] setName = {"Hello", "you", "are", "using", "jstl", "in", "jsp"};
request.setAttribute("getName", setName);
%>
<html>
<body>
<table>
<tr><td>Print</td></tr>
<c:forEach var="itemName" items="#{getName}">
<tr>
<td>${itemName}</td>
</tr>
</c:forEach>
</table>
</body>
</html>
Learning : I was using <%# taglib prefix="c" uri="http://java.sun.com/jstl/core" %> instead of <%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
I am using Tiles within my web-application. I have a standard-layout (standard.jsp) within the tiles are used. On top of the standard.jsp are a lot of includes, concerning tag-libraries and such.
Let's do a simplified example.
standard.jsp:
<%# page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%# include file="/WEB-INF/jsp/includes/include.jsp" %>
<html>
<head>
<tiles:insertAttribute name="head" flush="false"/>
</head>
<body>
<tiles:insertAttribute name="body" flush="false"/>
</body>
</html>
body.jsp:
<div id="body-div">
<p>Hello, <c:out value="${forname}" />!</p>
</div>
This prints:
Hello, !
In the tiles I would like to use the tags, but it's not working. It only works, if I add the includes to the tile-jsp.
body.jsp with includes:
<%# include file="/WEB-INF/jsp/includes/include.jsp" %>
<div id="body-div">
<p>Hello, <c:out value="${forname}" />!</p>
</div>
This prints:
Hello, John!
Is there a better way to do this or do I have to add all includes to every jsp used?
You don't need ALL includes to be present in each of your tiles, but each used tag-library in a tile must specifically be included in the using tile.
eg :
In your example, each tile using the C JSTL library should at least have the <%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> include