jstl General Purpose Tags: c:out

General Purpose Tags:

1.    <c: out>

    One of the general purpose core library tag is <c: out>. The main function of the this tag is to display the output to the user. It works like expression tag in jsp <%= ---%>.

    Form1:

1.    <c:out value = “MYJAVAHUB”/>

It prints MYJAVAHUB  in to the Jsp.

2.    <c: out  value = “${param.uname}”/>

It prints the value of request parameter uname of the Jsp.

    Form2:

<c:out value = “${param.uname}”  default = “Java Jobs”/>

If the main value is not available  or  it evaluates to null then default value will be considered.
    

Attributes:

<c: out> defines the following 3 attributes.

1.    value: It is the mandatory attribute and it is for providing the value.It should be either literal (or) runtime expression.

2.    default: It is optional attribute and it is to provide default value.

Jsp engine considered its value if and only if the value attributes evaluates to null.

3.    Escape xml: True if the tag should escape special XML characters

test.jsp

<%@ page isELIgnored="false" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <h1> WELCOME TO ::: <c:out value="${param.uname}" default="MYJAVAHUB "></c:out> </h1>

         
Case1:  http://localhost:8080/Scwcd_jsp/test.jsp   

 Case2 : http://localhost:8080/Scwcd_jsp/test.jsp?uname=JAVA%20PORTAL

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