1

Is there a nice way to dependency inject using a jsp taglib?

either using ejb 3.0, spring, or guice...

I have a lot of services/pojos that I would like to use in my taglibs

4

3 回答 3

1

I think you want Seam, it enables you to refer to a component by name. However, the released version is JSF based, but that's changing.

于 2008-09-26T20:54:41.960 回答
0

在 servletContext 上保留对注入器的引用，然后根据需要在每个标记中使用。看

在您的 Guice 设置中：

public class GuiceServletConfig extends GuiceServletContextListener {

@Override
protected Injector getInjector() {
    return Guice.createInjector(blah, blah);
}

@Override
public void contextDestroyed(ServletContextEvent servletContextEvent) {
    ServletContext servletContext = servletContextEvent.getServletContext();
    servletContext.removeAttribute(Injector.class.getName());
    super.contextDestroyed(servletContextEvent);
}

@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
    Injector injector = getInjector();
    ServletContext servletContext = servletContextEvent.getServletContext();
    servletContext.setAttribute(Injector.class.getName(), injector);
    super.contextInitialized(servletContextEvent);
}

}

然后在你的标签库中：

@Singleton
@SuppressWarnings("serial")
public class MySampleTag extends TagSupport {
@Inject private MyInjectedService myService;

@Override
public int doStartTag() throws JspException {
    Injector injector = (Injector) pageContext.getServletContext().getAttribute(Injector.class.getName());
    injector.injectMembers(this);

    String value = myService.doSomething();
            etc.
            etc.
于 2014-01-02T00:42:04.327 回答
0

只是偶然发现了你的问题，因为我也打算这样做。您实际上可以使用 Spring 及其 @Configurable 注释（使用 AspectJ 加载时或编译时编织）将服务注入到您的标签实现中。有关所有选项的详细说明，请在此处查看 Ramnivas 的博客文章。

希望在您仍然需要解决方案的情况下提供帮助...

于 2009-07-20T09:22:50.127 回答