用Jersey构建RESTful服务3--JAVA对象转成JSON输出_jersey 框架 直接接受实体类 用什么json转换器

 user.setAge("27");  
 user.setUserId("005");  
 user.setUserName("Fmand");  
 return user;  
} 

  
 MediaType.APPLICATION\_JSON 说明输出的是JSON格式 
  


2,运行项目，浏览器输入<http://localhost:8089/RestDemo/rest/users/getUserJson>


期望获取到json的数据，此时，项目报错

org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException: MessageBodyWriter not found for media type=application/json, type=class com.waylau.rest.bean.User, genericType=class com.waylau.rest.bean.User.
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor T e r m i n a l W r i t e r I n t e r c e p t o r . a r o u n d W r i t e T o ( W r i t e r I n t e r c e p t o r E x e c u t o r . j a v a : 247 ) a t o r g . g l a s s f i s h . j e r s e y . m e s s a g e . i n t e r n a l . W r i t e r I n t e r c e p t o r E x e c u t o r . p r o c e e d ( W r i t e r I n t e r c e p t o r E x e c u t o r . j a v a : 162 ) a t o r g . g l a s s f i s h . j e r s e y . f i l t e r . L o g g i n g F i l t e r . a r o u n d W r i t e T o ( L o g g i n g F i l t e r . j a v a : 293 ) a t o r g . g l a s s f i s h . j e r s e y . m e s s a g e . i n t e r n a l . W r i t e r I n t e r c e p t o r E x e c u t o r . p r o c e e d ( W r i t e r I n t e r c e p t o r E x e c u t o r . j a v a : 162 ) a t o r g . g l a s s f i s h . j e r s e y . s e r v e r . i n t e r n a l . J s o n W i t h P a d d i n g I n t e r c e p t o r . a r o u n d W r i t e T o ( J s o n W i t h P a d d i n g I n t e r c e p t o r . j a v a : 103 ) a t