Do I need to explicitly use “autowire” in xml file to autowire in Spring web app?

The effect is essentially the same. The Resource provides a decoupling from spring as it's in the javax package Resource is also equivalent of using Autowired in combination with Qualifier.

I want to ask that is that the same case with using @Resource. I mean do I need to write autowire in bean for that The effect is essentially the same. The @Resource provides a decoupling from spring as it's in the javax package.

@Resource is also equivalent of using @Autowired in combination with @Qualifier But in some of files @Resource is working without writing autowire in beans Yes, that's how it works. It does "autowire"-by-name when applied like @Resource("someBean") regardless of any value autowire = "byName".

There is one bean in web app which does not autowire using @resource unless I use autowire="ByName" in that bean xml file . But same bean work with autowire in other file . How can I know which thing is causing problem – John Mar 29 at 13:08 @Pasha, unfortunately only through loggig (enable debug logging for spring, e.g. , using log4j).

– Johan Sjöberg Mar 29 at 13:18 I tried everything for about last6 days but could not find out , then I tried autowire and it worked but don't know why – John Mar 29 at 14:09.

When you autowire by name (default is by type within the @Autowired annotation), then there is basically no difference between it and @Resource. You can either choose to define those autowired beans in xml, or you just add to your application-context. Xml, where service (for example) is your package to tell spring where to scan for annotations in your project.

Then it will automatically find those annotated classes (within that package).

The @Resource annotation doesn't use autowiring, since you specify the name of the resource you want to wire in. So you don't need to specify any particular autowire value on the bean. Even if you use the @Autowire annotation, you shouldn't need to set the autowire attribute.

You use the attribute or the annotation but you don't need both.

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