google \u7684 protobuf \u662f\u6700\u8fd1\u975e\u5e38\u706b\u7684\u5c06\u7ed3\u6784\u5bf9\u8c61\u8fdb\u884c\u5e8f\u5217\u5316\u53ca\u53cd\u5e8f\u5217\u5316\u7684\u5de5\u5177\uff0c\u636egoogle\u79f0\uff0c\u5df2\u7ecf\u5e94\u7528\u5728\u4e86google\u975e\u5e38\u591a\u7684\u5185\u90e8\u9879\u76ee\u4e0a\u3002<\/p>\n
\uff11\u3001\u4e0b\u8f7dprotobuf,protoc:<\/p>\n
https:\/\/code.google.com\/p\/protobuf\/downloads\/detail?name=protobuf-2.4.1.tar.bz2&can=2&q=<\/p>\n
https:\/\/code.google.com\/p\/protobuf\/downloads\/detail?name=protoc-2.4.1-win32.zip&can=2&q=<\/p>\n
\uff12\u3001\u4e0b\u8f7d\u4e0b\u6765\u7684protoc\u653e\u5728 protobuf\/java\/src\u76ee\u5f55\u4e0b<\/p>\n
\uff13\u3001\u5728protobuf\/java\u76ee\u5f55\u4e0b\u4fee\u6539pom.xml(\u4ec5windows\u4e0b\u9700\u8981\u4fee\u6539)<\/p>\n
<exec executable=”..\/src\/protoc”><\/p>\n
\u4fee\u6539\u4e3a\uff1a<\/p>\n
<exec executable=”src\\protoc.exe”><\/p>\n
\uff14\u3001\u6267\u884c\uff1a<\/p>\n
mvn test<\/p>\n
mvn install \u5b89\u88c5\u81f3 maven repository<\/p>\n
mvn package \u53ef\u4ee5\u6253\u5305\u6210jar\u5305\uff0c\u4f9b\u5355\u72ec\u4f7f\u7528<\/p>\n
mvn install -P lite \u751f\u6210lite\u7248\u672c\uff0clite\u7f3a\u5c11\u63cf\u8ff0\u53ca\u53cd\u5c04\u529f\u80fd\uff0c\u4f46\u5728\u624b\u673a\u5e73\u53f0\u4e0a\u63a8\u8350\u4f7f\u7528<\/p>\n
\u8fd9\u91cc\u6211\u4e5f\u6253\u5305\u4e86jar\u5305\uff0c\u7528\u6765\u5b66\u4e60\u65f6\u4f7f\u7528\u3002<\/p>\n
\uff15\u3001\u5728eclipse\u4e2d\u521b\u5efajava\u5de5\u7a0b\uff0c\u6765\u5b66\u4e60\u4e00\u4e0bprotobuf\u7684\u4f7f\u7528<\/p>\n
\u5efa\u7acbaddressbook.proto<\/p>\n
option java_package = “com.example.tutorial”;<\/p>\n
message Person {
\nrequired string name = 1;
\nrequired int32 id = 2;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ Unique ID number for this person.
\noptional string email = 3;<\/p>\n
enum PhoneType {
\nMOBILE = 0;
\nHOME = 1;
\nWORK = 2;
\n}<\/p>\n
message PhoneNumber {
\nrequired string number = 1;
\noptional PhoneType type = 2 [default = HOME];
\n}<\/p>\n
repeated PhoneNumber phone = 4;
\n}<\/p>\n
\/\/ Our address book file is just one of these.
\nmessage AddressBook {
\nrepeated Person person = 1;
\n}<\/p>\n
\u6267\u884c\uff1a<\/p>\n
protoc addressbook –java-out=.<\/p>\n
\u4f7f\u7528\u65b9\u5f0f\uff1a<\/p>\n
Person p = Person.newBuilder().setName(“hello world”).setId(111)
\n.build();
\nSystem.out.println(p.toByteArray().length);<\/p>\n
toByteArray()\u8fdb\u884c\u5e8f\u5217\u5316\uff0cparseFrom()\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\u3002<\/p>\n
\u4e0b\u9762\u5728maven\u4e2d\u96c6\u6210:<\/p>\n
\u6dfb\u52a0plugin:<\/p>\n
<plugin>
\n<artifactId>maven-antrun-plugin<\/artifactId>
\n<executions>
\n<execution>
\n<id>generate-sources<\/id>
\n<phase>generate-sources<\/phase>
\n<configuration>
\n<tasks>
\n<mkdir dir=”target\/generated-sources” \/>
\n<exec executable=”protoc”>
\n<arg
\nvalue=”–java_out=target\/generated-sources” \/>
\n<arg
\nvalue=”src\/main\/protobuf\/test.proto” \/>
\n<\/exec>
\n<\/tasks>
\n<sourceRoot>
\ntarget\/generated-sources
\n<\/sourceRoot>
\n<\/configuration>
\n<goals>
\n<goal>run<\/goal>
\n<\/goals>
\n<\/execution>
\n<\/executions>
\n<\/plugin><\/p>\n
\u6dfb\u52a0dependency:<\/p>\n
<dependency>
\n<groupId>com.google.protobuf<\/groupId>
\n<artifactId>protobuf-java<\/artifactId>
\n<version>2.4.1<\/version>
\n<\/dependency><\/p>\n
\u91cc\u9762\u6709\u4e00\u4e2a\u53cd\u5c04\u673a\u5236\uff0c\u9700\u8981\u67e5\u4e00\u4e0b\u80fd\u8d77\u5230\u4ec0\u4e48\u4f5c\u7528<\/p>\n
option optimize_for = SPEED; \/\/ \u9ed8\u8ba4<\/p>\n \u53e6\u5916\uff0c\u9700\u8981\u68c0\u67e5\u4e00\u4e0bprotobuf\u7684\u538b\u7f29\u3002\u6d4b\u8bd5\u4e86\u4e00\u4e0b\uff0c\u5b57\u7b26\u4e32\u597d\u50cf\u5e76\u672a\u538b\u7f29\u3002<\/p>\n \u4ecesmartfox\u4e0a\u67e5\u627e\u4e00\u4e0b\u4ed6\u4eec\u7528\u7684\u538b\u7f29\u5de5\u5177\uff0c\u7ee7\u7eed\u6d4b\u8bd5\u4e00\u4e0b\u3002<\/p>\n \u51b3\u5b9a\u4f7f\u7528snappy\u7b97\u6cd5\u3002<\/p>\n https:\/\/github.com\/dain\/snappy<\/p>\n \u5404\u79cd\u538b\u7f29\u7b97\u6cd5\u5728java\u5e73\u53f0\u4e0a\u7684\u6d4b\u8bd5\u7ed3\u679c\u3002<\/p>\n \u5b9e\u9645\u6d4b\u8bd5\u540e\u538b\u7f29\u6548\u679c\u4e0d\u5c3d\u5982\u4eba\u610f\uff0c\u4f7f\u7528\u4e86deflate\u548csnappy\u538b\u7f29\u7b97\u6cd5\uff0c\u5206\u522b\u6d4b\u8bd5\u4e86\u5c0f\u4e8e\uff12\uff10\u5b57\u8282\u548c\uff11\uff12\uff10\u5b57\u8282\u7684\u538b\u7f29\uff0c\u53ea\u80fd\u538b\u7f29\u4e0d\u5230\uff12\uff10\uff05\uff0c\u521d\u59cb\u6000\u7591protobuf\u7684\u4e8c\u8fdb\u5236\u5df2\u7ecf\u5145\u5206\u4f18\u5316\u8fc7\u4e86\uff0c\u5982\u679c\u662f\u8fd9\u6837\u7684\u8bdd\uff0c\u518d\u6d88\u8017cpu\u8fdb\u884c\u538b\u7f29\u5c31\u6ca1\u6709\u5fc5\u8981\u4e86\u3002\u4f46\u662f\u4e5f\u4e0d\u6392\u9664\u6d4b\u8bd5\u7684\u6837\u672c\u592a\u5c11\u3002\u53ef\u4ee5\u7b49\u6b63\u5f0f\u4e0a\u7ebf\u540e\uff0c\u518d\u56de\u5934\u8fdb\u884c\u538b\u7f29\u7684\u6d4b\u8bd5\u3002\u5bf9\u4e86\uff0csnappy\u5fc5\u987b\u5728jdk7\u4e0b\u8fd0\u884c\uff0c\u56e0\u4e3a\u7528\u4e86\u5230sun\u7684\u975e\u516c\u5f00\u51fd\u6570\uff0c\u6240\u4ee5\u9700\u8981\u6ce8\u610f\u4e00\u4e0b\u662f\u76ee\u6807\u73af\u5883\u662f\u5426\u652f\u6301\u3002<\/p>\n \u4f7f\u7528protobuf\u8fd8\u6709\u4e00\u4e2a\u597d\u5904\uff0c\u53ef\u4ee5\u907f\u514d\u4f7f\u7528java\u53cd\u5c04\u673a\u5236\u5e26\u6765\u7684\u6548\u7387\u964d\u4f4e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" google \u7684 protobuf \u662f\u6700\u8fd1\u975e\u5e38\u706b\u7684\u5c06\u7ed3\u6784\u5bf9\u8c61\u8fdb\u884c\u5e8f\u5217\u5316\u53ca\u53cd\u5e8f\u5217\u5316 …<\/p>\noptimize_for \u8fd9\u4e2a\u9009\u9879\u9700\u8981\u5173\u6ce8\u4e00\u4e0b\uff0c\u5982\u679c\u5f00\u53d1\u624b\u673a\u7f51\u6e38\uff0c\u8fd9\u4e2a\u9009\u9879\u4f1a\u6709\u5927\u7528\u5904\u3002<\/code><\/p>\nCODE_SIZE<\/code><\/p>\nLITE_RUNTIME \/\/\u624b\u673a\u7f51\u6e38\u63a8\u8350\u4f7f\u7528\u8fd9\u79cd
\n<\/code><\/p>\n