Question

运行使用crud模块的播放应用时出现此异常。奇怪的是，当我收到此错误并刷新网页时，播放应用程序正常工作并正确加载页面。似乎播放编译器-in DEV模式 - 无法在第一个请求中编译CRUD类。我不知道为什么DEV模式下的播放编译器经常无法编译我的播放网络应用程序中的某些类？

我使用eclipse IDE＆amp;我怀疑eclipse会锁定一些java源文件并阻止游戏编译java源代码;但是我不确定这一点。可能有某些原因导致播放DEV模式编译器失败＆amp;我无法弄清楚。这些天来，这个问题在玩游戏网络应用程序时发生了很多。

这个错误意味着什么以及如何修复它？

ERROR ~ 

@69g88ea66
Internal Server Error (500) for request GET /

Template execution error (In {module:crud}/app/views/tags/crud/types.tag around line 3)
Execution error occured in template {module:crud}/app/views/tags/crud/types.tag. Exception raised was NullPointerException : null.

play.exceptions.TemplateExecutionException
    at play.templates.BaseTemplate.throwException(BaseTemplate.java:86)
    at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:257)
    at play.templates.GroovyTemplate$ExecutableTemplate.invokeTag(GroovyTemplate.java:379)
    at /conf/routes.(line:42)
    at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:232)
    at play.templates.Template.render(Template.java:26)
    at play.templates.GroovyTemplate.render(GroovyTemplate.java:187)
    at play.mvc.Router.parse(Router.java:162)
    at play.mvc.Router.load(Router.java:48)
    at play.mvc.Router.detectChanges(Router.java:219)
    at Invocation.HTTP Request(Play!)
Caused by: java.lang.NullPointerException
    at play.classloading.ApplicationCompiler$2.acceptResult(ApplicationCompiler.java:266)
    at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:478)
    at play.classloading.ApplicationCompiler.compile(ApplicationCompiler.java:282)
    at play.classloading.ApplicationClassloader.getAllClasses(ApplicationClassloader.java:424)
    at play.classloading.ApplicationClassloader.getAssignableClasses(ApplicationClassloader.java:453)
    at play.classloading.ApplicationClassloader$getAssignableClasses.call(Unknown Source)
    at {module:crud}/app/views/tags/crud/types.tag.(line:3)
    at play.templates.GroovyTemplate.internalRender(GroovyTemplate.java:232)
    ... 9 more

--------------- UPDATE ----------------

我在路径文件中使用的CRUD路由。我需要删除它们吗？

#{crud.types}
GET         /?                                          ${type.controllerClass.name.substring(12).replace('$','')}.index
GET         /${type.controllerName}                     ${type.controllerClass.name.substring(12).replace('$','')}.list
GET         /${type.controllerName}/new                 ${type.controllerClass.name.substring(12).replace('$','')}.blank
GET         /${type.controllerName}/{id}                ${type.controllerClass.name.substring(12).replace('$','')}.show
GET         /${type.controllerName}/{id}/{field}        ${type.controllerClass.name.substring(12).replace('$','')}.attachment
GET         /${type.controllerName}/{id}/edit           ${type.controllerClass.name.substring(12).replace('$','')}.edit
POST        /${type.controllerName}                     ${type.controllerClass.name.substring(12).replace('$','')}.create
POST        /${type.controllerName}/{id}                ${type.controllerClass.name.substring(12).replace('$','')}.save
DELETE      /${type.controllerName}/{id}                ${type.controllerClass.name.substring(12).replace('$','')}.delete
#{/crud.types}

playframework加载类时出现CRUD NullPointerException

0 个答案: