Mapped exception to response: 500 (Internal Server Error)
2014-04-29 14:15
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严重: A message body writer for Java class java.util.Collections$SingletonList, and Java type java.util.Collection, and MIME media type application/json was not found 2012-7-12 13:55:32 com.sun.jersey.spi.container.ContainerResponse write 严重: The registered message body writers compatible with the MIME media type are: */* -> com.sun.jersey.core.impl.provider.entity.FormProvider com.sun.jersey.core.impl.provider.entity.StringProvider com.sun.jersey.core.impl.provider.entity.ByteArrayProvider 2012-7-12 13:55:32 com.sun.jersey.spi.container.ContainerResponse logException 严重: Mapped exception to response: 500 (Internal Server Error) javax.ws.rs.WebApplicationException: com.sun.jersey.api.MessageException: A message body writer for Java class java.util.Collections$SingletonList, and Java type java.util.Collection, and MIME media type application/json was not found at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:285) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454) at java.lang.Thread.run(Thread.java:619) Caused by: com.sun.jersey.api.MessageException: A message body writer for Java class java.util.Collections$SingletonList, and Java type java.util.Collection, and MIME media type application/json was not found 第一个可能的解决方案: 可能存在不同版本的jar包共存,删除其一; 第二个可能的解决方案: 相应的bean需要加上注解@XmlRootElement()
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