serialization

问题 public class TestJacksonColor { public static void main(String [] args) throws IOException { ObjectMapper objectMapper = new ObjectMapper(); Color black = new Color(0, 0, 0); String json = objectMapper.writeValueAsString(black); Color backToObject = objectMapper.readValue(json, Color.class); } } The code attempts to take an java.awt.color class serialize it using jackson objectmapper. Take the resulting json string and deserialize it back to an java.awt.color class. However when doing the

问题 public class TestJacksonColor { public static void main(String [] args) throws IOException { ObjectMapper objectMapper = new ObjectMapper(); Color black = new Color(0, 0, 0); String json = objectMapper.writeValueAsString(black); Color backToObject = objectMapper.readValue(json, Color.class); } } The code attempts to take an java.awt.color class serialize it using jackson objectmapper. Take the resulting json string and deserialize it back to an java.awt.color class. However when doing the

问题 public class TestJacksonColor { public static void main(String [] args) throws IOException { ObjectMapper objectMapper = new ObjectMapper(); Color black = new Color(0, 0, 0); String json = objectMapper.writeValueAsString(black); Color backToObject = objectMapper.readValue(json, Color.class); } } The code attempts to take an java.awt.color class serialize it using jackson objectmapper. Take the resulting json string and deserialize it back to an java.awt.color class. However when doing the

问题 I have a situation in which one table is related to another via a foreign key as follows: models.py class Container(models.Model): size = models.CharField(max_length=20) shape = models.CharField(max_length=20) class Item(models.Model): container = models.ForeignKey(Container, related_name='items') name = models.CharField(max_length=20) color = models.CharField(max_length=20) serializers.py class ItemSerializer(serializers.ModelSerializer): class Meta: model = Item class ContainerSerializer

问题 I have a situation in which one table is related to another via a foreign key as follows: models.py class Container(models.Model): size = models.CharField(max_length=20) shape = models.CharField(max_length=20) class Item(models.Model): container = models.ForeignKey(Container, related_name='items') name = models.CharField(max_length=20) color = models.CharField(max_length=20) serializers.py class ItemSerializer(serializers.ModelSerializer): class Meta: model = Item class ContainerSerializer

问题 I have a multiline string: >>> import credstash >>> d = credstash.getSecret('alex_test_key', region='ap-southeast-2') To see the raw data (first 162 characters): >>> credstash.getSecret('alex_test_key', region='ap-southeast-2')[0:162] u'-----BEGIN RSA PRIVATE KEY-----\nMIIEogIBAAKCAQEA6oySC+8/N9VNpk0gJS7Gk8vn9sYN7FhjpAQnoHRqTN/Oaiyx\nxk2AleP2vXpojA/DHldT1JO+o3j56AHD+yfNFFeYvgWKDY35g49HsZZhbyCEAB45\n' And: >>> print d[0:162] -----BEGIN RSA PRIVATE KEY----- MIIEogIBAAKCAQEA6oySC+8

问题 Task to be Acomplished I'm trying to serialize a vector of integers into a string so that it can be stored into a file. The approach used is to copy the integers byte-by-byte into a buffer. For this I used the std::copy_n function. To deserialize, I've done the same thing in reverse i.e. copied byte-by-byte into an integer from the buffer and appended those integers to a vector. I'm not sure if this is the best/fastest way to achieve this. Code Serialize function char *serialize(vector <int>

问题 I am testing struct module because I would like to send simple commands with parameters in bytes (char) and unsigned int to another application. However I found some weird things when converting to little endian unsigned int, these examples print the correct hexadecimal representation: >>> import struct >>> struct.pack('<I',7) b'\x07\x00\x00\x00' >>> struct.pack('<I',11) b'\x0b\x00\x00\x00' >>> struct.pack('<I',16) b'\x10\x00\x00\x00' >>> struct.pack('<I',15) b'\x0f\x00\x00\x00' but these

问题 I only want only to de-serializing a certain data member, without serializing it. I understand I can set EmitDefaultValue =false, and set the value to null. But I also do not want to change the value of the datamember, is there any other way of achieving this? The serializer is DataContractSerializer. :) Thanks. 回答1: You can change the value of the data member before the serialization (to the default value, so it doesn't get serialized), but then after the serialization you'd change it back -

问题 I'm deserializing an object using Json.NET that contains a private field of type Guid and a public property for that field. When the value for my Guid is null in my json I want to assign Guid.Empty to my field. public class MyClass { private Guid property; public Guid Property { get { return property; } set { if (value == null) { property = Guid.Empty; } else { property = value; } } } } But the deserializer wants to access the private field, cause I get this error when I try to deserialize: