Follow the post about Spring Security, in this post I will guide how to implement Spring Security remember me to your spring web application. Remember me is a convenient feature that allow user automatically logged to application without need to enter username and password.
Spring security provide two difference implement of remember me service Token-based remember me and Persistent remember me service Continue reading Spring security remember me
Today i will guide how to install and configure apache 2 with tomcat on Centos server using mod_proxy plugin
Scenario of this configuration:
- Server A install web server apache and have domain app.devjav.com(this domain already point to server A)
- Server B install tomcat server listen on port 8080
- We need allow user access application run on tomcat server in server B through domain app.devjav.com
Continue reading How to configure Apache 2 with Tomcat
As request from subscriber, today i write a spring mvc quickstart application, that can help every body has a starting point for spring mvc project.
Below list out technologies that you need for this tutorial
- Eclipse Lunar
- Spring Framework
- Tomcat 8 server
1. Create maven web project
Continue reading Spring mvc quickstart
When working with spring scheduler, you will see we can use cron expression to configure when scheduled task will run. In this post i will help you to know how cron expression work.
Cron expression is six fields that separate by single space. Below is ordinary of field from left to right with possible values.
||, / * -
||, / * -
||Day of month
||, / * – ?
||1-12 or JAN-DEC
||, / * -
||1-7 or MON-SUN
||, / * – ?
- ,: list possible values
- / sequence
- *: every possible values
- -: rage from two numbers
- ?: unspecific value
- 0/5 * * * * *: for every five second
- * 0-59/2 * * * *: for every two minutes: 0,2,4,8…58
- * * 2,14 * * MON-FRI: run on 2am and 2 pm from Monday to Friday
Today I will guide you how to using spring scheduler to do schedule tasks on your application. In this sample scheduler application I will create a simple job to print out current date time after each minute.
Tools and technique that you need in this sample:
- Eclipse Luna
- JDK 7
- Spring Framework 4
Continue reading Spring scheduler quickstart
When you develop maven java project sometime you will get issue is some jars library that you need but not yet or not exist on maven center repository, so how you can make your project build work with these issues. In this post i will guide you how to install local jars into maven local repository. Continue reading How to install local jars into maven local repository
When working with XML or Web service sometime you will get issue with namespaces To make more clear and solve some issues relate this i will explain on this post the use of
elementFormDefault on XML Schema
To understand how
elementFormDefault affect to our XML document on validate with XML schema we need to understand following concepts:
- Global vs. Local elements
- Qualified vs. Unqualified Elements
Continue reading XML Schema elementFormDefault meaning
Today i face with a issue when i use java HttpUrlConnection to connect to a site i alway get http code 403. I finally over come that issue after loose a couple of hours. So i write down here a post and hope can help much people on this prolem. When you search and come to this post i think you can quickly find out solution here.
Some sites will enable to reject when connect to by none browser tool and our connect using HttpUrlConnection violate this rule so the site do not allow to connect.
To solve this issue we can bypass the rule by setting agent header for our connect to those sites
URL url= new URL("site you need connect here");
HttpURLConnection hConnection = (HttpURLConnection) url.openConnection();
hConnection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11");
When you use maven to build and manage dependencies on a project and you want supply that project to other project without maven, i am sure you will get a question how i can copy all libraries this project depend on? In this post i will show you how to use maven to download dependencies.
To do that i using maven plugin
Copying project dependencies. I add following lines to my
With this config when we do maven -install command it will copy all libraries that project is depended to target/lib folder.
In this post i will guide you through how to solve below hibernate exception when using HQL
org.hibernate.hql.internal.ast.QuerySyntaxException: Class-name is not mapped
In my experience has many reasons for that exception. I will guide you step by step to check the issue
1. Check your hibernate config file
hibernate.cgf.xml, do you have define that class yet or not in that file. If you already define please go to next step
2. If you using hibernate mapping file, please naming for that file same as Class name.
3. If your persistence class define with annotation @Entity(name=’entity_name’) so please use that in HQL in case that you use unqualified name for example if your class is
SystemParameter but you annotation @Entity(name=’param’) please use
param name. Cause hibernate will use this alias name instead of class name.
4. If all above not work for you so please use full qualified name for example