To enable or to disable the JSON and POJO mapping:

• Common definition file (cjrconf.properties)
  Specify true or false for the com.sun.jersey.api.json.POJOMappingFeature feature. This value is not case-sensitive.
  
• Initialization parameter of a web.xml servlet
  You can set the following values for the servlet initialization parameter (com.sun.jersey.api.json.POJOMappingFeature). This value is not case-sensitive.
  

  Table 18-1 Values available for the servlet initialization parameter (com.sun.jersey.api.json.POJOMappingFeature)

  Value	Explanation
  true	Enables the JSON and POJO mapping.
  false	Disables the JSON and POJO mapping.
  Values other than true and false	The value specified as the initialization parameter of a web.xml servlet is ignored and the value specified in the common definition file is used.

If a value is specified in both the common definition file and as the servlet initialization parameter, the value specified in the servlet initialization parameter is preferred.