java.io.IOException cannot be resolved
可以考慮jre包的版本是不是不對 工程右鍵Properties，選擇java Build Path。 如果JRE System Library後面有紅色的符號，切換到libraries，選中錯誤的Remove，再點擊Add Library。 選擇JRE System Library。 點擊Finish，然後等工程重新編譯就好了。
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相關文章
- 1. The import xxx cannot be resolved ，String cannot be resolved
- 2. android.annotation cannot be resolved
- 3. tomcat:javax.servlet.http.HttpServletRequest cannot be resolved
- 4. android.widget cannot be resolved
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- 6. javax.servlet.jsp.JspException cannot be resolved
- 7. The import java.util cannot be resolved The import javax.servlet cannot be resolved
- 8. javax.servlet.jsp.PageContext cannot be resolved to a type
- 9. The type org.springframework.context.ConfigurableApplicationContext cannot be resolved.
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