包org.springframework.stereotype不存在，而且更多

Question

我有一个使用Spring和IntelliJ的web应用程序项目，到目前为止它一直运行得很好，但是今天我尝试运行它，它开始给我带来这个错误

这只是一小部分

Error:(27, 29) java: cannot find symbol
  symbol:   class RequestParam
  location: class com.eina.as.controladores.ControladorHome
Error:(8, 47) java: package org.springframework.web.bind.annotation does not exist
Error:(19, 6) java: cannot find symbol
  symbol:   class RequestMapping
  location: class com.eina.as.controladores.ControladorHome
Error:(25, 6) java: cannot find symbol
  symbol:   class RequestMapping
  location: class com.eina.as.controladores.ControladorHome
Error:(42, 26) java: cannot find symbol
  symbol:   class RequestParam
  location: class com.eina.as.controladores.ControladorHome
Error:(28, 29) java: cannot find symbol
  symbol:   class RequestParam
  location: class com.eina.as.controladores.ControladorHome
Error:(6, 38) java: package org.springframework.stereotype does not exist
Error:(9, 47) java: package org.springframework.web.bind.annotation does not exist
Error:(44, 25) java: cannot find symbol
  symbol:   class HttpServletRequest
  location: class com.eina.as.controladores.ControladorHome
Error:(43, 26) java: cannot find symbol
  symbol:   class RequestParam
  location: class com.eina.as.controladores.ControladorHome
Error:(11, 26) java: package javax.servlet.http does not exist
Error:(41, 6) java: cannot find symbol
  symbol:   class RequestMapping
  location: class com.eina.as.controladores.ControladorHome
Error:(29, 29) java: cannot find symbol
  symbol:   class RequestParam
  location: class com.eina.as.controladores.ControladorHome
Error:(16, 2) java: cannot find symbol
  symbol: class Controller
Error:(7, 47) java: package org.springframework.web.bind.annotation does not exist
Error:(26, 29) java: cannot find symbol
  symbol:   class RequestParam
  location: class com.eina.as.controladores.ControladorHome

有更多的错误，但它们基本上是相同的上面。我不知道发生了什么，我试着重新导入"pom.xml“，但是它什么也没做。我已经删除并克隆了这个项目几次。

提前感谢

Answer 1

清理maven项目。然后更新项目快照或更新maven项目。还检查m2目录中的依赖项。然后再重建这个项目。

1. 清洁Maven项目。项目-> RightClick ->运行为-> Maven Clean
2. 更新Maven项目。项目->右键单击-> Maven -> Upadte项目一个新窗口将打开。选择项目并选中标记“快照的强制更新”。然后更新。
3. 重建这个项目。右键单击->运行作为-> Maven安装