I am totally new to Spring and started to do the official guides from this site: https://spring.io/guides I’d like to do this guide: https://spring.io/guides/gs/scheduling-tasks/ I get the following Exception: The application starter class is this: As you can see, the main method contains a commented li…
Tag: spring
how to capture connection event in my webSocket server with Spring 4?
I did a simple web socket communication with spring 4,STOMP and sock.js, following this https://github.com/rstoyanchev/spring-websocket-portfolio and this http://assets.spring.io/wp/WebSocketBlogPost.html well, I want to know if is possible capture connection events like when a new client was connected to my …
What are template classes in Spring Java? Why are they called templates? For example jdbc-template, jms-template etc
I’m new to Java. I’ve only been programming it for about a year. What does Spring mean by the use of templates? In Spring, there is jdbc-templates, jms-templates etc.. What are template classes in java? Are they a special kind of design pattern or what? Thank you in advance. Answer They are called…
How to use PostgreSQL hstore/json with JdbcTemplate
Is there a way to use PostgreSQL json/hstore with JdbcTemplate? esp query support. for eg: hstore: for Json Answer Although quite late for an answer (for the insert part), I hope it might be useful someone else: Take the key/value pairs in a HashMap: use one of the following way to insert them to PostgreSQL: …
How to configure UCanAccess JDBC driver with Spring?
Whenever I tried to use an ODBC driver to access MDB files, it gave me an error: So I decided to use the UCanAccess JDBC driver instead. Does anyone have experience configuring UCanAccess JDBC driver with Spring? I’ve put the UCanAccess.jar into my lib folder and configured it like below, but that doesn…
How to show localization messages with parameters in Spring 3 / Thymeleaf
I’m using Spring 3 and Thymeleaf to make some webpages and I am lost as for how to show messages like this: welcome.message=Hello {0}, welcome! and then replace {0} with the user name inside thymeleaf tags: I’m not even sure if {0} is the right syntax for the bundle message. Answer You can use whe…
Spring HttpInputMessage encoding
Is there any way to get the content encoding from the [HttpInputMessage][1] into a HttpMessageConverter? I browsed the documentation but I cannot find any relevant info. Answer I’m not sure I understand exactly what you want. If by encoding you mean the Content-Encoding or Content-Type header, then all …
Add context path to Spring Boot application
I am trying to set a Spring Boot applications context root programmatically. The reason for the context root is we want the app to be accessed from localhost:port/{app_name} and have all the controller paths append to it. Here is the application configuration file for the web-app. Here is the index controller…
Removing user login credentials from session when user logout in spring-security
I am new to Spring and Spring-Security. I have been going through the tutorials here The user are not allowed to hit add employee page without login. So if you hit add employee page, you will be directed to the login page and when login succeeded you are directed to the add employee page automatically. But on…
Why is my Spring @Autowired field null?
Note: This is intended to be a canonical answer for a common problem. I have a Spring @Service class (MileageFeeCalculator) that has an @Autowired field (rateService), but the field is null when I try to use it. The logs show that both the MileageFeeCalculator bean and the MileageRateService bean are being cr…