Protocol Buffers
Protocal Buffers(简称protobuf)是谷歌的一项技术，用于结构化的数据序列化、反序列化，常用于RPC 系统（Remote Procedure Call Protocol System）和持续数据存储系统。
其类似于XML生成和解析，但protobuf的效率高于XML，不过protobuf生成的是字节码，可读性比XML差，类似的还有json、Java的Serializable等。
很适合做数据存储或 RPC 数据交换格式。可用于通讯协议、数据存储等领域的语言无关、平台无关、可扩展的序列化结构数据格式。
Idea安装protobuf插件
配置依赖
pom.xml
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| <dependencies>
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>3.4.0</version>
</dependency>
</dependencies>
<build>
<extensions>
<extension>
<groupId>kr.motd.maven</groupId>
<artifactId>os-maven-plugin</artifactId>
<version>1.4.1.Final</version>
</extension>
</extensions>
<plugins>
<plugin>
<groupId>org.xolstice.maven.plugins</groupId>
<artifactId>protobuf-maven-plugin</artifactId>
<version>0.5.0</version>
<configuration>
<protocArtifact>
com.google.protobuf:protoc:3.1.0:exe:${os.detected.classifier}
</protocArtifact>
<pluginId>grpc-java</pluginId>
</configuration>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>compile-custom</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
|
书写proto文件
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| syntax = "proto3"
option java_package = "cn.joinhealth"
option java_outer_classname = "LicenseModel"
message License {
string permission = 1
}
|
转化成Java文件
测试
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| package cn.joinhealth.interview.web.root;
import com.google.protobuf.InvalidProtocolBufferException;
public class Test {
public static void main(String[] args) throws InvalidProtocolBufferException {
LicenseModel.License.Builder builder = LicenseModel.License.newBuilder();
builder.setPermission("1,2,3,4,5,6,7,8,9,10");
LicenseModel.License license = builder.build();
System.out.println("before:" + license);
System.out.println("===Person Byte:");
for (byte b : license.toByteArray()) {
System.out.print(b);
}
System.out.println();
System.out.println("================\n");
byte[] byteArray = license.toByteArray();
LicenseModel.License license1 = LicenseModel.License.parseFrom(byteArray);
System.out.println("after:" + license1.getPermission());
}
}
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结果
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| before:permission: "1,2,3,4,5,6,7,8,9,10"
===Person Byte:
10204944504451445244534454445544564457444948
================
after:1,2,3,4,5,6,7,8,9,10
|