public static File toJsonFile(String jsonString, File returnJsonFile) {
        try {
            jsonMapper.writeValue(returnJsonFile, jsonString);
            return returnJsonFile;
        } catch (Exception e) {
            return JMExceptionManager.handleExceptionAndReturnNull(log, e,
                    "toJsonFile", jsonString);
        }
    }
public static File toJsonFile ( String jsonString , File returnJsonFile ) { try { jsonMapper . writeValue ( returnJsonFile , jsonString ) ; return returnJsonFile ; } catch ( Exception e ) { return JMExceptionManager . handleExceptionAndReturnNull ( log , e , "toJsonFile" , jsonString ) ; } }
To json file file.

@param jsonString     the json string
@param returnJsonFile the return json file
@return the file