Action請求后台出現Response already commited異常解決方法

本文轉載自查看原文 2018-11-24 11:53 3559 java/ action

在編寫導出功能使用action請求，在處理導出異常時期望跳轉異常頁，Controller中的方法返回類型String的url

在處理完邏輯導出文件后后台控制台出現

WARN [org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver] (default task-22) Handling of [org.springframework.http.converter.HttpMessageNotWritableException] resulted in Exception: java.lang.IllegalStateException: UT010019: Response already commited

and

ERROR [io.undertow.request] (default task-22) UT005023: Exception handling request to /snq-admin/data/exportDataDetail.do: org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: UT010029: Stream is closed; nested exception is java.io.IOException: UT010029: Stream is closed

Caused by: org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: UT010029: Stream is closed; nested exception is java.io.IOException: UT010029: Stream is closed

Caused by: java.io.IOException: UT010029: Stream is closed

在寫入文件時調用requestOutputStream.write()方法已將response發出，再在Controller中return時被認為是再發送一次，因而會報錯，解決這個問題只需返回null即可。

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