How to call constant java variables from jsp expression language in Spring?
I spent all day looking for the right solution, but no luck! The question is how, for example, to call constant java variables from jsp with el $ {bean.objectName}. What's the best practice?
I wonder if this can be done, im completely new to Spring and jsp.
Persistent class:
public class RNConstant {
public static final String HELLO_WORLD = "Hello World again!";
public static final String DEFAULT_LOCALE = "id_ID";
public static final String CONTEXT_PATH_SOAP_SR = "soap.sr";
}
Waiting in jsp to be called with EL
<p>${RNConstant.HELLO_WORLD}</p>
I could do it with a script like below, but I couldn't get this to work if it works in weblogic. This works in apache tomcat v7 or v8
<%@ page import="static id.co.telkom.common.RNConstant.*" %>
...
...
<%= HELLO_WORLD %>
Error in weblogic
home.jsp:2:18: Syntax error on token "static", Identifier expected after this token
<%@ page import="static id.co.telkom.common.RNConstant.*" %>
^-------------------------------------^
home.jsp:11:19: HELLO_WORLD cannot be resolved
Hello world! <%=HELLO_WORLD%>
^--------^
java version: 1.6
pom.xml
spring
<version>1.0.0-BUILD-SNAPSHOT</version>
<properties>
<java-version>1.6</java-version>
<org.springframework-version>3.2.8.RELEASE</org.springframework-version>
<org.springjs-version>2.0.5.RELEASE</org.springjs-version>
<org.springws-version>2.2.1.RELEASE</org.springws-version>
<org.springsecurity-version>3.2.3.RELEASE</org.springsecurity-version>
<jackson-version>1.9.10</jackson-version>
<org.aspectj-version>1.6.10</org.aspectj-version>
<org.slf4j-version>1.6.6</org.slf4j-version>
</properties>
The script issue was resolved with the codes below and the contents of the RNConstant still remain.
<%@ page import="id.co.telkom.common.RNConstant" %>
...
...
<%= RNConstant.HELLO_WORLD %>
Greetings,
Hendry
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Just keep the import statement
<%@ page import="static id.co.telkom.common.RNConstant.*" %>
Remove the ". *" After RNConstant
. Also remove the static word at the beginning.
<%@ page import="id.co.telkom.common.RNConstant" %>.
To cause permanent use of HELLO_WORLD
<p>${RNConstant.HELLO_WORLD}</p> <p>${RNConstant.HELLO_WORLD}</p>
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Waiting in jsp to be called with EL
<p>${RNConstant.HELLO_WORLD}</p>
EL checks and bean translates HELLOWORLD
into getHELLOWORLD()
, because the spec says that access to these attributes must be in such a way, so you have to create getter
or to visibility constants will be limited to the representation of jsp:
public class RNConstant
{
public final static String HELLO_WORLD = "Hello World again!";
public static String getHELLO_WORLD() {
return HELLO_WORLD;
}
}
If you cannot create getters check this answer
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