getWriter()和getOutputStream()不能同时调用

 

HTTP Status 500 ? Internal Server Error

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Type Exception Report

Message getWriter() has already been called for this response

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

java.lang.IllegalStateException: getWriter() has already been called for this response
	org.apache.catalina.connector.Response.getOutputStream(Response.java:590)
	org.apache.catalina.connector.ResponseFacade.getOutputStream(ResponseFacade.java:194)
	com.itheima.content.ErrorServlet.doGet(ErrorServlet.java:34)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Note The full stack trace of the root cause is available in the server logs.

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Apache Tomcat/8.5.16