smile_juan-优快云博客

原创 Windows 7 Task Scheduler Start a Program

I need to set up a Task Scheduler to run my batch job. Here is the steps which described onWindows website:Open Task Scheduler by clicking the Start button , clicking Control Panel, clic

2014-01-03 06:54:43 1839

原创 See how Google celebrates my birthday

It did surprise me today! Google customize the image for celebrating my Birthday! Haha...

2014-01-03 06:08:11 780

转载 Embedding a portlet in web content

Today I had a test embeded portlet in web content. This article exactly shows the steps how to embed portlet in a web content.portlet-id: This is the unique id for a portlet in Liferay.instance-id

2013-04-05 05:48:55 925

转载 Java compareTo, equals and hashcode

Last time, when our team reviewed my code, they pointed several problems of my code. I'm really happy to learn from them. Until now, what I do is only to make the code work. Then, I'll try to refactor

2013-03-23 03:07:23 1053

原创 Liferay And Twitter

Requirements: In our Liferay instance, we need to display organizations' tweets in twitter portlet. Those organizations' twitter account is configured in organization's twitter custom field.Before I

2013-03-21 04:45:43 1171

原创 Liferay on Private Site to get Public Site Page URL

This is a very interesting design in our website. We have a private site only for registered member. There's a youbar portlet which list bunches of articles. Members can share those articles in social

2013-03-21 00:59:48 2536

原创 Liferay PortletURL(Render, Action, Resource)

1.To get currentURL :PortletURL url = PortletURLUtil.getCurrent(renderRequest, renderResponse);2. Creating PortletURL from renderResponse : a.For renderURL:PortletURL renderURL = renderRespons

2013-03-19 23:39:25 2787

原创 Spring load properties file and MessageFormat

During yesterday's code review, learn another way to load properties file by using Spring. Spring is so powerful, I love it!I found there are two ways to do that:1. use 1) Define your properties

2013-03-09 04:03:29 1599

原创 Liferay social bookmarks

It seems very common to connect with social networks in our websites. Liferay provides a tag to connect with facebook, twitter and plusone. It's very convenient to just use one tag.The interesting t

2013-03-07 00:20:52 1803

原创 RESTeasy to make a REST Call

Previously I wrote an article to use Jersey to make a REST call. Afterwards, we changed to use RESTeasy to do that. The reason we changed that doesn't convince me, because we decided to use JSON inste

2013-03-06 23:15:33 1522

原创 Liferay LocalServiceUtil and ServiceUtil

In Liferay, there's a lot of Service Util classes. They're really convenient. One thing I notice is that there's LocalServiceUtil and ServiceUtil class.The difference between them is permission chec

2013-03-06 23:04:39 1599

原创 Required String parameter is not present

I ran into the issue when I try to use Liferay friendly url. Previously, I didn't get the entire idea of friendly url and also how spring mvc works.Here is the steps:1. My view.jsp has a link to

2013-03-06 23:00:59 77891 1

原创 Liferay get Journal Article based on Journal Structure name

Recently, our project uses Liferay web content product a lot. It's very useful. The good thing is content author can go there and change without help with developer. And we can set template for those

2013-03-06 22:36:15 5502

原创 jQuery cache

Yesterday I spent a lot of time on catch this problem. In my app, I need to make a GET Ajax request call to server side. After it's getting the time to DEV, I found the same URL will not be responded.

2013-02-09 06:58:39 1082

原创 Interesting way to validate number

Today when I read my co-worker's codes, I found an interesting way to validate if a string is numeric.Here is my way to do. Because I'm not good at regex, every time I need to search online and fin

2013-02-08 03:36:51 633

转载 Liferay Inter-portlet communication(client side)

It's very easy to do that. Liferay provides script to do that.This is the syntax: Liferay.fire(eventName, data) Liferay.on(eventName, function, [scope])In my case, one portlet just sends

2013-02-08 01:44:23 959

转载 When start tomcat, got the error: Resource /WEB-INF/classes not found

javax.naming.NameNotFoundException: Resource /WEB-INF/classes not foundat org.apache.naming.resources.BaseDirContext.listBindings(BaseDirContext.java:733)at org.apache.naming.resources.ProxyDirCon

2013-01-30 00:09:36 2504

转载 _blank, _self, _parent, _top, _new

_blank opens a new windows_self opens within the same window_parent is used with a frame, it will open within the inner frame_top is also used with a frame, it will open using the entire w

2013-01-24 22:39:12 2935

原创 JAXB annotations

Here is an example I need to deal with, it looks complicated. With the help of JAXB, it's really easy to get all values from the xml file.For example: article.xml world World A co

2013-01-22 06:29:59 938

原创 Jersey make REST call

When we make a rest call and the response is XML or JSON, it would be better to use plugins other than from scratch. I chose to use Jersey and JAXB. It's very convenient to code.1. We need to add je

2013-01-22 06:15:51 1035

原创 Read properties file in a jar

When I set the path of properties file, it's OK when we run in IDE. When I packed it in a jar and tried to run that, it won't pass. It seems strange because the path of the properties will be changed

2013-01-22 01:56:05 711

原创 Java Send email

Sometimes we want to send an email out when catch an exception. We need to use javax.mail jar to help us to do that. Actually we have several ways to do that. Here is to introduce the easiest way with

2013-01-22 01:37:49 1872

原创 log4j create a new log file every day

After I joined in new project, I realized log is very important. We can log in console or file. Here is to introduce a way to log in file without overwrite. It's really easy to use log4j.# Define

2013-01-22 01:24:31 1261

原创 Java Iterate directory to find files and edit

After mannually modified about 100 pages, I'm tired of doing that. So it's better to write a small program to deal with those thing.1. We need to find those files which we need to modify in differen

2013-01-18 01:13:50 683

原创 Make IDE(Eclipse) not overwrite our configured server setting

This is because of the default setting of IDE. By default, it overwrites every thing we configured when we restart the server. Go to Windows->Preferences->Server, and uncheck the selectbox.

2013-01-12 04:21:18 625

转载 Spring global exception handling with standalone app

I have a standalone app, I need to catch all exceptions. There's one case that when I disconnect the internet, I couldn't connect the database, and database operations are in another component. It'll

2013-01-10 05:12:46 1533

转载 java.lang.String cannot be resolved, Indirectly referenced from required .class file

Here is the solution.It's similar to the link I found. http://dev-answers.blogspot.com/2009/06/eclipse-build-errors-javalangobject.htmlGo to properties of project with the build error (right c

2013-01-08 00:37:27 1671

原创 JSP "items" does not support runtime expressions

${datatables.engine} ${datatables.browser} ${datatables.platform} ${datatables.version} ${datatables.grade} In my JSP page, I import JSTL taglib like above, but it gives me the e

2012-12-27 00:07:53 9503

转载 Developing portlets using Spring Portlet MVC and Liferay ServiceBuilder

A good blog links to Liferay and Springhttp://xebee.xebia.in/2011/09/04/developing-portlets-using-spring-portlet-mvc-and-liferay-servicebuilder/

2012-12-22 05:40:18 789

原创 JRebel

Recently, I tried an awesome an Tool - JRebel. It saves a lot of time of compile and deploy our project. In my case, I have to package a war file for my project and copy that from dist folder in our S

2012-12-22 02:04:37 458

原创 Customize Liferay SDK plugins(portlet) to Maven project

In our case, we use maven portlet instead of default ant portlet, every time we need to modify. What I do is to create our own template and read properties file to create the project.Here is my exam

2012-12-20 01:07:26 847

原创 Ant Task check if a file exists

This is to remember what I learned when I customize Liferay SDK plugins.In my case, I need to read a properties file and then get those values to create portlet. The first thing, I have to validate

2012-12-20 00:53:57 1735

原创 Get value from properties file outside a jar using Spring

I have a jar file which need to dynamically load external properties file and read values from this properties file. Those values are needed in the java program. With Spring, it's very easy to do that

2012-12-19 06:56:10 1440

转载 Java JDBC Performance vs. iBatis vs. Hibernate

http://phillips4jc.blogspot.com/2011/03/java-jdbc-performance-vs-ibatis.htmlhttp://arxiv.org/ftp/arxiv/papers/0710/0710.1404.pdf

2012-12-14 23:21:56 1140

转载 Config log4j in standalone app

1. First make sure you've added the log4j.jar2. config log4j.xml and log4j.propertiesShow an example:log4j.xml log4j.propertieslog4j.rootLogger=DEBUG, CAlog4j.ap

2012-12-14 07:39:42 826

原创 Spring config different datasource based on different environment(dev, test, prod) Two ways now

Spring is very powerful when I use Spring more and more, it provides a lot of fancy functions. In my standalone app, I config datasource in context.xml, jdbc.driver.name, url, username, password, all

2012-12-14 06:56:52 1124

原创 Maven generates jar file with main class setting and dependency libs copy

When I write a pure java project, I'm afraid of writing deployment doc. Because I need to generate jar file. The most frustrating thing is add other libs into the jar. Maven is a fabulous tool which g

2012-12-14 06:38:14 1803

原创 Eclipse or IDE integrated with Eclipse .project and .classpath files

Recently, I got a very interesting task. In our daily work, we use Liferay, Liferay uses Ant to create projects. All projects created by Liferay is basic not targeted to our client. So when we create

2012-12-12 22:47:23 1784

转载 Export table data sql scrpit on sql server 2008

Since this is my first time working on sql server, I didn't know how to export data. Previously, I was silly to write the insert sql manually. It's time-consuming.This time, I have to insert a lot of

2012-12-12 00:38:09 2505

原创 Liferay hook works with external customized jar which is built by Spring

I ran into the issue when I was customizing organization in Liferay. My organization hook needs to connect with external tables outside Liferay database. Another limitation is I have to use ant to bui

2012-12-11 07:17:17 871