Grails中的servletContext在哪里?

时间:2010-11-24 13:02:23

标签: java grails servlets

Grails应用程序中可用的servletContext在哪里?我试图在Config.groovy中访问它,但它没有用。在视图中访问它也是不可能的。

我想将temp目录设置为使用storage = (File)servletContext["javax.servlet.context.tempdir"]在我的开发和测试环境中存储上传文件的目录。

按照Burt的建议,我在conf / Config.groovy中尝试了以下内容:

environments {
    production {
        grails.serverURL = "http://demo.com"
    }
    development {
        grails.serverURL = "http://localhost:8080/${appName}"
        storageDir = org.codehaus.groovy.grails.web.context.ServletContextHolder
            .getServletContext()["javax.servlet.context.tempdir"]
    }
    test {
        grails.serverURL = "http://localhost:8080/${appName}"
    }

}

...但是得到了这个错误:

java.lang.NullPointerException: Cannot get property 'javax.servlet.context.tempd
ir' on null object
        at Config$_run_closure1_closure4.doCall(Config.groovy:59)
        at Config$_run_closure1_closure4.doCall(Config.groovy)
        at Config$_run_closure1.doCall(Config.groovy:57)
        at Config$_run_closure1.doCall(Config.groovy)
        at Config.run(Config.groovy:53)
        at _GrailsPackage_groovy$_run_closure1.doCall(_GrailsPackage_groovy:52)
        at _GrailsPackage_groovy$_run_closure2_closure10.doCall(_GrailsPackage_g
roovy:93)
        at _GrailsPackage_groovy$_run_closure2_closure10.doCall(_GrailsPackage_g
roovy)
        at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:2
80)
        at _GrailsSettings_groovy$_run_closure10.call(_GrailsSettings_groovy)
        at _GrailsPackage_groovy$_run_closure2.doCall(_GrailsPackage_groovy:92)
        at RunApp$_run_closure1.doCall(RunApp.groovy:28)
        at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
        at gant.Gant.withBuildListeners(Gant.groovy:427)
        at gant.Gant.this$2$withBuildListeners(Gant.groovy)
        at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
        at gant.Gant.dispatch(Gant.groovy:415)
        at gant.Gant.this$2$dispatch(Gant.groovy)
        at gant.Gant.invokeMethod(Gant.groovy)
        at gant.Gant.executeTargets(Gant.groovy:590)
        at gant.Gant.executeTargets(Gant.groovy:589)
Failed to compile configuration file: Cannot get property 'javax.servlet.context
.tempdir' on null object

2 个答案:

答案 0 :(得分:2)

如果您的代码中没有访问权限,则可以使用org.codehaus.groovy.grails.web.context.ServletContextHolder.getServletContext()

答案 1 :(得分:1)

您可以从任何控制器访问它。您可以从bootstrap.groovy访问它,但我对此表示怀疑。有关从控制器访问它的示例,请参阅 http://www.grails.org/doc/latest/ref/Controllers/servletContext.html