java - Grails 项目中的 ClassCastException

Question

我在 grails 项目中遇到了一些关于 ClassCastException 的问题。 我不明白这有什么问题。

2015-10-16 14:07:19 | http-bio-8096-exec-10 | ERROR | org.codehaus.groovy.grails.web.errors.GrailsExceptionResolver | ClassCastException occurred when processing request: [POST] /gci/m-t
fr.xxx.use.gci.consumer.rest.MTService cannot be cast to fr.xxx.use.gci.consumer.rest.MTService. Stacktrace follows:
java.lang.ClassCastException: fr.xxx.use.gci.consumer.rest.MTService cannot be cast to fr.xxx.use.gci.consumer.rest.MTService
    at fr.xxx.use.gci.MTController$$EPRHJ9I6.save(MTController.groovy:26)
    at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:195)
    at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
    at fr.xxx.xxxxx.authentication.AnnuaireCredentialCheckerFilter.doFilter(AnnuaireCredentialCheckerFilter.groovy:84)
    at fr.xxx.xxxxx.security.mock.MockAuthenticationFilter.doFilter(MockAuthenticationFilter.groovy:60)
    at com.granicus.grails.plugins.cookiesession.CookieSessionFilter.doFilterInternal(CookieSessionFilter.java:78)
    at fr.xxx.use.navigation.NexturlValidationFilter.doFilter(NexturlValidationFilter.groovy:52)
    at fr.xxx.use.requestid.RequestIdFilter.doFilter(RequestIdFilter.groovy:38)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)

所以，这是我的 Controller

class MTController {

def mTService

def index() {
    render view:'index'
}

def save(){
    def flux = request.JSON

    if (!flux.numCT || !flux.numST) {
        render status: HttpServletResponse.SC_BAD_REQUEST
        return
        }

    def bddId = mTService.saveInfos(flux.numCT, flux.numST)
    if (bddId == null) {
        render status: HttpServletResponse.SC_BAD_REQUEST
        return
    }
}

这就是我的服务

class MTService {

def saveInfos(numCT, numST) {
    def mTOTD = new InitMT()

    mTOTD.numCT = numCT
    mTOTD.numST = numST
    return mTOTD.save()
}

}

Answer 1

很可能 grails clean 可以解决该问题。该错误非常奇怪，我怀疑正在运行的代码不是您认为正在运行的代码。