{"id":1301,"date":"2018-07-13T17:05:36","date_gmt":"2018-07-13T09:05:36","guid":{"rendered":"https:\/\/www.xiaobo.li\/?p=1301"},"modified":"2018-07-13T17:05:36","modified_gmt":"2018-07-13T09:05:36","slug":"protobuf","status":"publish","type":"post","link":"https:\/\/www.xiaobo.li\/notes\/archives\/1301","title":{"rendered":"Protobuf"},"content":{"rendered":"

Protobuf\u6d88\u606f\u5b9a\u4e49<\/strong><\/p>\n

 <\/p>\n

\u8981\u901a\u4fe1\uff0c\u5fc5\u987b\u6709\u534f\u8bae\uff0c\u5426\u5219\u53cc\u65b9\u65e0\u6cd5\u7406\u89e3\u5bf9\u65b9\u7684\u7801\u6d41\u3002\u5728protobuf\u4e2d\uff0c\u534f\u8bae\u662f\u7531\u4e00\u7cfb\u5217\u7684\u6d88\u606f\u7ec4\u6210\u7684\u3002\u56e0\u6b64\u6700\u91cd\u8981\u7684\u5c31\u662f\u5b9a\u4e49\u901a\u4fe1\u65f6\u4f7f\u7528\u5230\u7684\u6d88\u606f\u683c\u5f0f\u3002<\/p>\n

\u6d88\u606f\u7531\u81f3\u5c11\u4e00\u4e2a\u5b57\u6bb5\u7ec4\u5408\u800c\u6210\uff0c\u7c7b\u4f3c\u4e8eC\u8bed\u8a00\u4e2d\u7684\u7ed3\u6784\u3002\u6bcf\u4e2a\u5b57\u6bb5\u90fd\u6709\u4e00\u5b9a\u7684\u683c\u5f0f\u3002<\/p>\n

\u5b57\u6bb5\u683c\u5f0f\uff1a\u9650\u5b9a\u4fee\u9970\u7b26\u2460 | \u6570\u636e\u7c7b\u578b\u2461 | \u5b57\u6bb5\u540d\u79f0\u2462 | = | \u5b57\u6bb5\u7f16\u7801\u503c\u2463 | [\u5b57\u6bb5\u9ed8\u8ba4\u503c\u2464]<\/p>\n

\u2460\uff0e\u9650\u5b9a\u4fee\u9970\u7b26\u5305\u542b required\\optional\\repeated<\/p>\n

Required: \u8868\u793a\u662f\u4e00\u4e2a\u5fc5\u987b\u5b57\u6bb5\uff0c\u5fc5\u987b\u76f8\u5bf9\u4e8e\u53d1\u9001\u65b9\uff0c\u5728\u53d1\u9001\u6d88\u606f\u4e4b\u524d\u5fc5\u987b\u8bbe\u7f6e\u8be5\u5b57\u6bb5\u7684\u503c\uff0c\u5bf9\u4e8e\u63a5\u6536\u65b9\uff0c\u5fc5\u987b\u80fd\u591f\u8bc6\u522b\u8be5\u5b57\u6bb5\u7684\u610f\u601d\u3002\u53d1\u9001\u4e4b\u524d\u6ca1\u6709\u8bbe\u7f6erequired\u5b57\u6bb5\u6216\u8005\u65e0\u6cd5\u8bc6\u522brequired\u5b57\u6bb5\u90fd\u4f1a\u5f15\u53d1\u7f16\u89e3\u7801\u5f02\u5e38\uff0c\u5bfc\u81f4\u6d88\u606f\u88ab\u4e22\u5f03\u3002<\/p>\n

Optional\uff1a\u8868\u793a\u662f\u4e00\u4e2a\u53ef\u9009\u5b57\u6bb5\uff0c\u53ef\u9009\u5bf9\u4e8e\u53d1\u9001\u65b9\uff0c\u5728\u53d1\u9001\u6d88\u606f\u65f6\uff0c\u53ef\u4ee5\u6709\u9009\u62e9\u6027\u7684\u8bbe\u7f6e\u6216\u8005\u4e0d\u8bbe\u7f6e\u8be5\u5b57\u6bb5\u7684\u503c\u3002\u5bf9\u4e8e\u63a5\u6536\u65b9\uff0c\u5982\u679c\u80fd\u591f\u8bc6\u522b\u53ef\u9009\u5b57\u6bb5\u5c31\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\uff0c\u5982\u679c\u65e0\u6cd5\u8bc6\u522b\uff0c\u5219\u5ffd\u7565\u8be5\u5b57\u6bb5\uff0c\u6d88\u606f\u4e2d\u7684\u5176\u5b83\u5b57\u6bb5\u6b63\u5e38\u5904\u7406\u3002---\u56e0\u4e3aoptional\u5b57\u6bb5\u7684\u7279\u6027\uff0c\u5f88\u591a\u63a5\u53e3\u5728\u5347\u7ea7\u7248\u672c\u4e2d\u90fd\u628a\u540e\u6765\u6dfb\u52a0\u7684\u5b57\u6bb5\u90fd\u7edf\u4e00\u7684\u8bbe\u7f6e\u4e3aoptional\u5b57\u6bb5\uff0c\u8fd9\u6837\u8001\u7684\u7248\u672c\u65e0\u9700\u5347\u7ea7\u7a0b\u5e8f\u4e5f\u53ef\u4ee5\u6b63\u5e38\u7684\u4e0e\u65b0\u7684\u8f6f\u4ef6\u8fdb\u884c\u901a\u4fe1\uff0c\u53ea\u4e0d\u8fc7\u65b0\u7684\u5b57\u6bb5\u65e0\u6cd5\u8bc6\u522b\u800c\u5df2\uff0c\u56e0\u4e3a\u5e76\u4e0d\u662f\u6bcf\u4e2a\u8282\u70b9\u90fd\u9700\u8981\u65b0\u7684\u529f\u80fd\uff0c\u56e0\u6b64\u53ef\u4ee5\u505a\u5230\u6309\u9700\u5347\u7ea7\u548c\u5e73\u6ed1\u8fc7\u6e21\u3002<\/p>\n

Repeated\uff1a\u8868\u793a\u8be5\u5b57\u6bb5\u53ef\u4ee5\u5305\u542b0~N\u4e2a\u5143\u7d20\u3002\u5176\u7279\u6027\u548coptional\u4e00\u6837\uff0c\u4f46\u662f\u6bcf\u4e00\u6b21\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u503c\u3002\u53ef\u4ee5\u770b\u4f5c\u662f\u5728\u4f20\u9012\u4e00\u4e2a\u6570\u7ec4\u7684\u503c\u3002<\/p>\n

 <\/p>\n

\u2461\uff0e\u6570\u636e\u7c7b\u578b<\/p>\n

Protobuf\u5b9a\u4e49\u4e86\u4e00\u5957\u57fa\u672c\u6570\u636e\u7c7b\u578b\u3002\u51e0\u4e4e\u90fd\u53ef\u4ee5\u6620\u5c04\u5230C++\\Java\u7b49\u8bed\u8a00\u7684\u57fa\u7840\u6570\u636e\u7c7b\u578b.<\/p>\n

protobuf \u6570\u636e\u7c7b\u578b<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n\u63cf\u8ff0<\/td>\n\u6253\u5305<\/td>\nC++\u8bed\u8a00\u6620\u5c04<\/td>\n<\/tr>\n
bool<\/td>\n\u5e03\u5c14\u7c7b\u578b<\/td>\n1\u5b57\u8282<\/td>\nbool<\/td>\n<\/tr>\n
double<\/td>\n64\u4f4d\u6d6e\u70b9\u6570<\/td>\nN<\/td>\ndouble<\/td>\n<\/tr>\n
float<\/td>\n32\u4e3a\u6d6e\u70b9\u6570<\/td>\nN<\/td>\nfloat<\/td>\n<\/tr>\n
int32<\/td>\n32\u4f4d\u6574\u6570\u3001<\/td>\nN<\/td>\nint<\/td>\n<\/tr>\n
uin32<\/td>\n\u65e0\u7b26\u53f732\u4f4d\u6574\u6570<\/td>\nN<\/td>\nunsigned int<\/td>\n<\/tr>\n
int64<\/td>\n64\u4f4d\u6574\u6570<\/td>\nN<\/td>\n__int64<\/td>\n<\/tr>\n
uint64<\/td>\n64\u4e3a\u65e0\u7b26\u53f7\u6574<\/td>\nN<\/td>\nunsigned __int64<\/td>\n<\/tr>\n
sint32<\/td>\n32\u4f4d\u6574\u6570\uff0c\u5904\u7406\u8d1f\u6570\u6548\u7387\u66f4\u9ad8<\/td>\nN<\/td>\nint32<\/td>\n<\/tr>\n
sing64<\/td>\n64\u4f4d\u6574\u6570 \u5904\u7406\u8d1f\u6570\u6548\u7387\u66f4\u9ad8<\/td>\nN<\/td>\n__int64<\/td>\n<\/tr>\n
fixed32<\/td>\n32\u4f4d\u65e0\u7b26\u53f7\u6574\u6570<\/td>\n4<\/td>\nunsigned int32<\/td>\n<\/tr>\n
fixed64<\/td>\n64\u4f4d\u65e0\u7b26\u53f7\u6574\u6570<\/td>\n8<\/td>\nunsigned __int64<\/td>\n<\/tr>\n
sfixed32<\/td>\n32\u4f4d\u6574\u6570\u3001\u80fd\u4ee5\u66f4\u9ad8\u7684\u6548\u7387\u5904\u7406\u8d1f\u6570<\/td>\n4<\/td>\nunsigned int32<\/td>\n<\/tr>\n
sfixed64<\/td>\n64\u4e3a\u6574\u6570<\/td>\n8<\/td>\nunsigned __int64<\/td>\n<\/tr>\n
string<\/td>\n\u53ea\u80fd\u5904\u7406 ASCII\u5b57\u7b26<\/td>\nN<\/td>\nstd::string<\/td>\n<\/tr>\n
bytes<\/td>\n\u7528\u4e8e\u5904\u7406\u591a\u5b57\u8282\u7684\u8bed\u8a00\u5b57\u7b26\u3001\u5982\u4e2d\u6587<\/td>\nN<\/td>\nstd::string<\/td>\n<\/tr>\n
enum<\/td>\n\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a\u7528\u6237\u81ea\u5b9a\u4e49\u7684\u679a\u4e3e\u7c7b\u578buint32<\/td>\nN(uint32)<\/td>\nenum<\/td>\n<\/tr>\n
message<\/td>\n\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a\u7528\u6237\u81ea\u5b9a\u4e49\u7684\u6d88\u606f\u7c7b\u578b<\/td>\nN<\/td>\nobject of class<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N \u8868\u793a\u6253\u5305\u7684\u5b57\u8282\u5e76\u4e0d\u662f\u56fa\u5b9a\u3002\u800c\u662f\u6839\u636e\u6570\u636e\u7684\u5927\u5c0f\u6216\u8005\u957f\u5ea6\u3002<\/p>\n

\u4f8b\u5982int32\uff0c\u5982\u679c\u6570\u503c\u6bd4\u8f83\u5c0f\uff0c\u57280~127\u65f6\uff0c\u4f7f\u7528\u4e00\u4e2a\u5b57\u8282\u6253\u5305\u3002<\/p>\n

\u5173\u4e8e\u679a\u4e3e\u7684\u6253\u5305\u65b9\u5f0f\u548cuint32\u76f8\u540c\u3002<\/p>\n

\u5173\u4e8emessage\uff0c\u7c7b\u4f3c\u4e8eC\u8bed\u8a00\u4e2d\u7684\u7ed3\u6784\u5305\u542b\u53e6\u5916\u4e00\u4e2a\u7ed3\u6784\u4f5c\u4e3a\u6570\u636e\u6210\u5458\u4e00\u6837\u3002<\/p>\n

\u5173\u4e8e fixed32 \u548cint32\u7684\u533a\u522b\u3002fixed32\u7684\u6253\u5305\u6548\u7387\u6bd4int32\u7684\u6548\u7387\u9ad8\uff0c\u4f46\u662f\u4f7f\u7528\u7684\u7a7a\u95f4\u4e00\u822c\u6bd4int32\u591a\u3002\u56e0\u6b64\u4e00\u4e2a\u5c5e\u4e8e\u65f6\u95f4\u6548\u7387\u9ad8\uff0c\u4e00\u4e2a\u5c5e\u4e8e\u7a7a\u95f4\u6548\u7387\u9ad8\u3002\u6839\u636e\u9879\u76ee\u7684\u5b9e\u9645\u60c5\u51b5\uff0c\u4e00\u822c\u9009\u62e9fixed32\uff0c\u5982\u679c\u9047\u5230\u5bf9\u4f20\u8f93\u6570\u636e\u91cf\u8981\u6c42\u6bd4\u8f83\u82db\u523b\u7684\u73af\u5883\uff0c\u53ef\u4ee5\u9009\u62e9int32.<\/p>\n

\u2462\uff0e\u5b57\u6bb5\u540d\u79f0<\/p>\n

\u5b57\u6bb5\u540d\u79f0\u7684\u547d\u540d\u4e0eC\u3001C++\u3001Java\u7b49\u8bed\u8a00\u7684\u53d8\u91cf\u547d\u540d\u65b9\u5f0f\u51e0\u4e4e\u662f\u76f8\u540c\u7684\u3002<\/p>\n

protobuf\u5efa\u8bae\u5b57\u6bb5\u7684\u547d\u540d\u91c7\u7528\u4ee5\u4e0b\u5212\u7ebf\u5206\u5272\u7684\u9a7c\u5cf0\u5f0f\u3002\u4f8b\u5982 first_name \u800c\u4e0d\u662ffirstName.<\/p>\n

\u2463\uff0e\u5b57\u6bb5\u7f16\u7801\u503c<\/p>\n

\u6709\u4e86\u8be5\u503c\uff0c\u901a\u4fe1\u53cc\u65b9\u624d\u80fd\u4e92\u76f8\u8bc6\u522b\u5bf9\u65b9\u7684\u5b57\u6bb5\u3002\u5f53\u7136\u76f8\u540c\u7684\u7f16\u7801\u503c\uff0c\u5176\u9650\u5b9a\u4fee\u9970\u7b26\u548c\u6570\u636e\u7c7b\u578b\u5fc5\u987b\u76f8\u540c\u3002<\/p>\n

\u7f16\u7801\u503c\u7684\u53d6\u503c\u8303\u56f4\u4e3a 1~2^32\uff084294967296\uff09\u3002<\/p>\n

\u5176\u4e2d 1~15\u7684\u7f16\u7801\u65f6\u95f4\u548c\u7a7a\u95f4\u6548\u7387\u90fd\u662f\u6700\u9ad8\u7684\uff0c\u7f16\u7801\u503c\u8d8a\u5927\uff0c\u5176\u7f16\u7801\u7684\u65f6\u95f4\u548c\u7a7a\u95f4\u6548\u7387\u5c31\u8d8a\u4f4e\uff08\u76f8\u5bf9\u4e8e1-15\uff09\uff0c\u5f53\u7136\u4e00\u822c\u60c5\u51b5\u4e0b\u76f8\u90bb\u76842\u4e2a\u503c\u7f16\u7801\u6548\u7387\u7684\u662f\u76f8\u540c\u7684\uff0c\u9664\u975e2\u4e2a\u503c\u6070\u597d\u5b9e\u57284\u5b57\u8282\uff0c12\u5b57\u8282\uff0c20\u5b57\u8282\u7b49\u7684\u4e34\u754c\u533a\u3002\u6bd4\u598215\u548c16.<\/p>\n

1900~2000\u7f16\u7801\u503c\u4e3aGoogle protobuf \u7cfb\u7edf\u5185\u90e8\u4fdd\u7559\u503c\uff0c\u5efa\u8bae\u4e0d\u8981\u5728\u81ea\u5df1\u7684\u9879\u76ee\u4e2d\u4f7f\u7528\u3002<\/p>\n

protobuf \u8fd8\u5efa\u8bae\u628a\u7ecf\u5e38\u8981\u4f20\u9012\u7684\u503c\u628a\u5176\u5b57\u6bb5\u7f16\u7801\u8bbe\u7f6e\u4e3a1-15\u4e4b\u95f4\u7684\u503c\u3002<\/p>\n

\u6d88\u606f\u4e2d\u7684\u5b57\u6bb5\u7684\u7f16\u7801\u503c\u65e0\u9700\u8fde\u7eed\uff0c\u53ea\u8981\u662f\u5408\u6cd5\u7684\uff0c\u5e76\u4e14\u4e0d\u80fd\u5728\u540c\u4e00\u4e2a\u6d88\u606f\u4e2d\u6709\u5b57\u6bb5\u5305\u542b\u76f8\u540c\u7684\u7f16\u7801\u503c\u3002<\/p>\n

\u5efa\u8bae\uff1a\u9879\u76ee\u6295\u5165\u8fd0\u8425\u4ee5\u540e\u6d89\u53ca\u5230\u7248\u672c\u5347\u7ea7\u65f6\u7684\u65b0\u589e\u6d88\u606f\u5b57\u6bb5\u5168\u90e8\u4f7f\u7528optional\u6216\u8005repeated\uff0c\u5c3d\u91cf\u4e0d\u5b9e\u7528required\u3002\u5982\u679c\u4f7f\u7528\u4e86required\uff0c\u9700\u8981\u5168\u7f51\u7edf\u4e00\u5347\u7ea7\uff0c\u5982\u679c\u4f7f\u7528optional\u6216\u8005repeated\u53ef\u4ee5\u5e73\u6ed1\u5347\u7ea7\u3002<\/p>\n

 <\/p>\n

\u2464\uff0e\u9ed8\u8ba4\u503c\u3002\u5f53\u5728\u4f20\u9012\u6570\u636e\u65f6\uff0c\u5bf9\u4e8erequired\u6570\u636e\u7c7b\u578b\uff0c\u5982\u679c\u7528\u6237\u6ca1\u6709\u8bbe\u7f6e\u503c\uff0c\u5219\u4f7f\u7528\u9ed8\u8ba4\u503c\u4f20\u9012\u5230\u5bf9\u7aef\u3002\u5f53\u63a5\u53d7\u6570\u636e\u662f\uff0c\u5bf9\u4e8eoptional\u5b57\u6bb5\uff0c\u5982\u679c\u6ca1\u6709\u63a5\u6536\u5230optional\u5b57\u6bb5\uff0c\u5219\u8bbe\u7f6e\u4e3a\u9ed8\u8ba4\u503c\u3002<\/p>\n

\u5173\u4e8eimport<\/p>\n

protobuf \u63a5\u53e3\u6587\u4ef6\u53ef\u4ee5\u50cfC\u8bed\u8a00\u7684h\u6587\u4ef6\u4e00\u4e2a\uff0c\u5206\u79bb\u4e3a\u591a\u4e2a\uff0c\u5728\u9700\u8981\u7684\u65f6\u5019\u901a\u8fc7 import\u5bfc\u5165\u9700\u8981\u5bf9\u6587\u4ef6\u3002\u5176\u884c\u4e3a\u548cC\u8bed\u8a00\u7684#include\u6216\u8005java\u7684import\u7684\u884c\u4e3a\u5927\u81f4\u76f8\u540c\u3002<\/p>\n

\u5173\u4e8epackage<\/p>\n

\u907f\u514d\u540d\u79f0\u51b2\u7a81\uff0c\u53ef\u4ee5\u7ed9\u6bcf\u4e2a\u6587\u4ef6\u6307\u5b9a\u4e00\u4e2apackage\u540d\u79f0\uff0c\u5bf9\u4e8ejava\u89e3\u6790\u4e3ajava\u4e2d\u7684\u5305\u3002\u5bf9\u4e8eC++\u5219\u89e3\u6790\u4e3a\u540d\u79f0\u7a7a\u95f4\u3002<\/p>\n

\u5173\u4e8emessage<\/p>\n

\u652f\u6301\u5d4c\u5957\u6d88\u606f\uff0c\u6d88\u606f\u53ef\u4ee5\u5305\u542b\u53e6\u4e00\u4e2a\u6d88\u606f\u4f5c\u4e3a\u5176\u5b57\u6bb5\u3002\u4e5f\u53ef\u4ee5\u5728\u6d88\u606f\u5185\u5b9a\u4e49\u4e00\u4e2a\u65b0\u7684\u6d88\u606f\u3002<\/p>\n

\u5173\u4e8eenum<\/p>\n

\u679a\u4e3e\u7684\u5b9a\u4e49\u548cC++\u76f8\u540c\uff0c\u4f46\u662f\u6709\u4e00\u4e9b\u9650\u5236\u3002<\/p>\n

\u679a\u4e3e\u503c\u5fc5\u987b\u5927\u4e8e\u7b49\u4e8e0\u7684\u6574\u6570\u3002<\/p>\n

\u4f7f\u7528\u5206\u53f7(;)\u5206\u9694\u679a\u4e3e\u53d8\u91cf\u800c\u4e0d\u662fC++\u8bed\u8a00\u4e2d\u7684\u9017\u53f7(,)<\/p>\n

eg.<\/p>\n

enum VoipProtocol<\/p>\n

{<\/p>\n

H323 = 1;<\/p>\n

SIP\u00a0 = 2;<\/p>\n

MGCP = 3;<\/p>\n

H248 = 4;<\/p>\n

}<\/p>\n

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\u539f\u6587\uff1a http:\/\/aoyouzi.iteye.com\/blog\/2288328<\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Protobuf\u6d88\u606f\u5b9a\u4e49   \u8981\u901a\u4fe1\uff0c\u5fc5\u987b\u6709\u534f\u8bae\uff0c\u5426\u5219\u53cc\u65b9\u65e0\u6cd5\u7406\u89e3\u5bf9\u65b9 … \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[331],"tags":[],"class_list":["post-1301","post","type-post","status-publish","format-standard","hentry","category-protocol"],"_links":{"self":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/1301","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/comments?post=1301"}],"version-history":[{"count":0,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/1301\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/media?parent=1301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/categories?post=1301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/tags?post=1301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}