Jetty提示错误MIME media type text/plain was not found

A message body writer for Java class java.lang.String, and Java type class java.lang.String, and MIME media type text/plain was not found.
The registered message body writers compatible with the MIME media type are:
*/* ->
  com.sun.jersey.server.impl.template.ViewableMessageBodyWriter

将项目中的jetty-server改为jersey-bundle便可。