Protobuf 数据类型

.proto Type

	Notes	C++ Type	Java Type
double		double	double
float		float	float
int32	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint32 instead.	int32	int
int64	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint64 instead.	int64	long
uint32	Uses variable-length encoding.	uint32	int
uint64	Uses variable-length encoding.	uint64	long
sint32	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.	int32	int
sint64	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s.	int64	long
fixed32	Always four bytes. More efficient than uint32 if values are often greater than 228.	uint32	int
fixed64	Always eight bytes. More efficient than uint64 if values are often greater than 256.	uint64	long
sfixed32	Always four bytes.	int32	int
sfixed64	Always eight bytes.	int64	long
bool		bool	boolean
string	A string must always contain UTF-8 encoded or 7-bit ASCII text.	string	String
bytes	May contain any arbitrary sequence of bytes.	string	ByteString

 public static Dictionary<string, string> MySqlToProbuffer = new Dictionary<string, string>()
        {
            {"varchar", "string"},
            {"longtext", "string"},
            {"text", "string"},
            {"char", "string"},
            {"mediumtext", "string"},
            {"bigint", "int64"},
            {"datetime", "int64"},
            {"timestamp", "int64"},
            {"int", "int32"},
            {"tinyint", "int32"},
            {"smallint", "int32"},
            {"decimal", "double"},
            {"double", "double"},
            {"float", "float"},
            {"bit", "bool"},
            {"blob", "bytes"},
            {"longblob", "bytes"},
            {"varbinary", "bytes"},
            {"binary", "bytes"}
        };

        public static Dictionary<string, string> ProbufferToJava = new Dictionary<string, string>()
        {
            {"string", "String"},
            {"int32", "Integer"},
            {"int64", "Long"},
            {"double", "Double"},
            {"float", "Float"},
            {"bool", "Boolean"},
            {"bytes", "ByteString"},
            {"uint32", "Integer"},
            {"uint64", "Long"},
            {"sint32", "Integer"},
            {"sint64", "Long"},
            {"fixed32", "Integer"},
            {"fixed64", "Long"},
            {"sfixed32", "Integer"},
            {"sfixed64", "Long"},
        };