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Created by zhidao on April 25, 2012 14:56:38
Last update: April 25, 2012 14:56:38
Lacking better alternatives, this is how I render a global validation error:
<spring:bind path="changePasswordForm">
<c:if ...
<form:errors> without path attribute seems to work too:
<form:errors cssClass="ui-error"/>
Created by Fang on April 16, 2012 13:32:10
Last update: April 16, 2012 13:32:10
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...
Created by Fang on March 30, 2012 12:15:49
Last update: March 30, 2012 12:15:49
1. mvc:default-servlet-handler Configures a handler for serving static resources by forwarding to the Servlet container's default Servlet. Use of this handler allows using a "/" mapping with the DispatcherServlet while still utilizing the Servlet container to serve static resources. HandlerMapping: org.springframework.web.servlet.handler.SimpleUrlHandlerMapping Handler: org.springframework.web.servlet.handler.SimpleUrlHandlerMapping Attribute Description default-servlet-name The name of the default Servlet to forward to for static resource requests. The handler will try to auto-detect the container's default Servlet at startup time using a list of known names. If the default Servlet cannot be detected because of using an unknown container or because it has been manually configured, the servlet name must be set explicitly. 2. mvc:view-controller Defines a simple Controller that selects a view to render the response. HandlerMapping: org.springframework.web.servlet.handler.SimpleUrlHandlerMapping Handler: org.springframework.web.servlet.mvc.ParameterizableViewController Attribute Description...
Created by Fang on March 30, 2012 10:07:25
Last update: March 30, 2012 10:09:08
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...
Created by magnum on July 26, 2010 15:55:41
Last update: March 28, 2012 15:28:02
Given the URL:
http://www.mydomain.com/myWebApp/theServlet/p1/p2/p3;sid=123?param=abc
This would be the output of the various method calls on HttpServletRequest :
String scheme = request.getScheme(); // ...
Created by Fang on March 15, 2012 10:24:35
Last update: March 15, 2012 10:24:35
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="$...
Created by nogeek on March 13, 2012 11:53:49
Last update: March 13, 2012 11:53:49
A. To configure Apache httpd to proxy Tomcat using HTTP: Load Apache httpd modules ( httpd.conf ):
LoadModule proxy_module /usr/lib/apache2/modules/m... Configure Apache httpd proxy: <VirtualHost *:80> ServerAdmin webmaster@my... Configure Tomcat HTTP connector with appropriate proxyName and proxyPort : <Connector port="8080" protocol="HTTP/1.1"... Note: context path must be the same for httpd and Tomcat. B. To configure Apache httpd to proxy Tomcat using AJP: Load Apache httpd modules ( httpd.conf ): LoadModule proxy_module /usr/lib/apache2/modules/m... Configure Apache httpd proxy: <VirtualHost *:80> ServerAdmin webmaster@my... Configure Tomcat AJP connector: <Connector port="8009" protocol="AJP/1.3" redirect... You can try this if context path must be changed between Tomcat and httpd: <VirtualHost *:80> ServerAdmin webmaster@my... But this may not work in case the servlet context path is written in the HTML content. ProxyPassReverse only...
Created by Dr. Xi on March 13, 2012 08:46:57
Last update: March 13, 2012 08:46:57
This trick sets HTML base to the root context path of the current webapp:
The short version:
<!DOCTYPE html>
<%@ taglib uri="http://java.sun...
The long version:
<!DOCTYPE html>
<%@ taglib uri="http://java.sun...
Created by Dr. Xi on March 08, 2012 09:16:02
Last update: March 08, 2012 09:16:02
In my JSP there's a link like this:
<a href="/path/${part1}/${part2}">the link</a>
where part1 and part2 may contain characters that need to be URL encoded (such as '#').
JSP JSTL does not provide such facility out of the box. But there's a hack using <c:url> , or you can use <spring:url> :
JSTL hack:
<c:url value="/path" var="theUrl">
<c:param...
Using Spring url tag:
<spring:url value="/path/{part1}/{part2}" var="enc...
Created by venky on March 05, 2012 13:36:41
Last update: March 05, 2012 13:36:41
Thanks Dr.Xi, I was having a tough time changing the deployment context path of my web-app using the
so-called context.xml file under /META-INF, it dint work (tomcat documentation at http://tomcat.apache.org/tomcat-6.0-doc/config/context.html , seemed pretty sure it would :()
But I have one question, as changing server.xml is too instrusive for every web-app you build, is there any other way of pushing this configuration to one of the application specific files ?
thanks,
Venky
