try to get the object value from the 'target' Object Void appendDeclaredFieldValues(Class c, String rootPackage, Object target, StringBuilder sb) throws IllegalAccessException * IllegalAccessException This function will search recursively and append all the values of the 'target' Object. * target the target object to get value from This is usually called in a loop of all your target data objects needed to be dumped. Return ''.equals(parentName) ? fieldName : parentName + '_' + fieldName Private String getCombinedName(String parentName, String fieldName) Sb.append(',').append(getCombinedName(parentName, fieldName)) If it is plain fields like String/int/bigDecimal, we append the filed name. If (filedClass.getDeclaredFields().length > 0 & filedClass.getPackage().getName().contains(rootPackage) & !filedClass.isEnum())ĪppendAllDeclaredFields(filedClass, rootPackage, getCombinedName(parentName, fieldName), sb) if we have declaredfileds and the filed is in in the same package as root and filed is not Enum, we continue search Void appendAllDeclaredFields(Class c, String rootPackage, String parentName, StringBuilder sb) * MyObject -> filed1,other_filed2,otherfield3 * This function will search recursively and append all the fields * sb the string builder to append values with comma delimited * parentName The parent class name so that we could combine all its path. * rootPackage The root package to compare(we only get fields from the same package to exclude other java class) append header first using reflectionĪppendAllDeclaredFields(YourClass.class, ().getName(), '', sb) deserialize the json to the mapped java object using gson or jackson.

Header should become: firstName, lastName, isAlive, age, address_streeAddress, address_city, address_state, address_postalCode, phoneNumbers_type….etc Actions: 1. The csv header should contain fields from each level and separated by ‘_’.

Convert nested json to csv python