There are two steps to create a custom function for JSP: Declare the function in the TLD: <?xml version="1.0" encoding="UTF-8" ?> <taglib... Implement the function (must be static): package com.example; public class UrlTransl... To use the function: <%@ taglib uri="http://www.example.com/jsp/tags" p...

I tested this on Spring MVC 3.1. <?xml version="1.0" encoding="UTF-8"?> <beans x...

Spring MVC 3.1 can send either JSON or HTML response on the same URL, depending on the type of response requested. With this mechanism, a page can be sent when directly requested from a link, but a JSON response can be sent in response to an AJAX request. This is the controller code: package com.example; import java.util.Map; ... In the above example, JSON response will be sent when the HTTP request contains header "Accept: application/json". HTML response will be sent then the header is "Accept: */*", or "Accept: text/html", or anything else. You can add a limitation that the HTML response does not produce "application/json". But then the question is which response will be sent when the HTTP header is "Accept: */*"? Both methods will...

After a user resets a password, I want to force the user to change the password before she gets access to secured content. This is usually done with a servlet filter. But with Spring MVC, you can also use a HandlerInterceptor . According to Spring JavaDoc: HandlerInterceptor is basically similar to a Servlet 2.3 Filter, but in contrast to the latter it just allows custom pre-processing with the option of prohibiting the execution of the handler itself, and custom post-processing. Filters are more powerful, for example they allow for exchanging the request and response objects that are handed down the chain. Note that a filter gets configured in web.xml, a HandlerInterceptor in the application context. As a basic guideline, fine-grained handler-related preprocessing tasks are candidates...

Suppose that I have an email field annotated with: @NotEmpty(message="Please enter email address") ... Bean validation will trigger two errors when no email address is entered: the email field is empty an empty email field is not a valid email address Displaying both errors to the user with <form:errors> would be redundant and confusing: <%@ taglib uri="http://www.springframework.org/tag... This is how to display the first error only: <spring:bind path="emailAddress"> <c:if test="$...

This is a bare bones Maven project to get started with Java JSR 303 bean validation. Directory structure: ./pom.xml ./src ./src/main ./src/main/jav... pom.xml : <project xmlns="http://maven.apache.org/POM/4.0.0"... which includes dependencies on JUnit, Java bean validation API and the Hibernate validator reference implementation.

The landing page after login can be configured with the default-target-url attribute of form-login . If a user was redirected to the login form after requesting a restricted URL, she's redirected to the original requested page after successful login. An easy configuration looks like this: <beans:beans xmlns="http://www.springframework.org... But there are times that you want to do more initialization after login (such as loading user data), or apply more complex logic before redirecting. This is where the authentication-success-handler-ref attribute comes into play. You create a class that implements org.springframework.security.web.authentication.AuthenticationSuccessHandler and use that as the authentication-success-handler-ref : <http entry-point-ref="authProcessFilterEn... This is a skeleton implementation: public class MyAuthenticationSuccessHandler implem...

Some example snippets for Spring message configuration and usage. To configure a message source in Spring context (basename=messages): <bean id="messageSource" class="org.springf... Locale change interceptor can also be setup with: <?xml version="1.0" encoding="UTF-8"?> <beans x... The messages file should be named messages.properties (or messages_en.properties , etc.) and located on CLASSPATH , for example: WEB-INF/classes . To use a message resource in JSP: <%@ taglib prefix="spring" uri="http://www.springf...

Step 1: define the message code: code.with.arg=arg1: {0}, arg2: {1}, arg3: {2} Step 2: use it in the JSP with comma separated arguments: <%@ taglib uri="http://www.springframework.org/tag... If the argument itself contains a comma: <%@ taglib uri="http://www.springframework.org/tag...

Tomcat gzip compression filter can be turned on with " compression=on " in server.xml : <Connector port="8080" protocol="HTTP/1.1" ... The default compressed MIME types are: text/html,text/xml,text/plain . It would be nice to add other types: <Connector port="8080" protocol="HTT...