Google protobuffer序列化工具使用以及与idea集成

参考：https://www.cnblogs.com/liugh/p/7505533.html

创建Maven项目，pom.xml文件添加如下内容：

    <properties>
        <protobuf.version>3.6.1</protobuf.version>
        <grpc.version>1.6.1</grpc.version>
    </properties>
    <dependencies>

    <dependency>
        <groupId>com.google.protobuf</groupId>
        <artifactId>protobuf-java</artifactId>
        <version>${protobuf.version}</version>
    </dependency>

    </dependencies>
    <build>
        <extensions>
            <extension>
                <groupId>kr.motd.maven</groupId>
                <artifactId>os-maven-plugin</artifactId>
                <version>1.5.0.Final</version>
            </extension>
        </extensions>
        <plugins>  
            <!-- 编译google protobuffer -->
            <plugin>
                <groupId>org.xolstice.maven.plugins</groupId>
                <artifactId>protobuf-maven-plugin</artifactId>
                <version>0.5.0</version>
                <configuration>
                    <protocArtifact>com.google.protobuf:protoc:${protobuf.version}:exe:${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>

在main目录下新建proto文件夹，并将该文件夹设置为源代码目录（编译时会自动去这个目录下找proto文件），如下图：

在该目录下编写proto文件，这里写各测试的Person.proto，内容如下：

syntax = "proto3";  //标识是protobuffer3  ，默认是2

package protobuffer.proto;
option java_package = "com.heavy.learn.protobuffer";
option java_outer_classname = "PersonPB";


message Person  {
   sint64 id = 1;
   int32 age = 2;
   string name=3;
   repeated float exam = 4;
   bool  good =5;
   bytes byt = 6;
   double d = 7 ;
   enum Level {
      NORMAL= 0;
      GOOD= 1;
      BAD = 2;

   }
   Level level = 8;

   map<string,list> map = 9;

   message list{
      repeated Person ele=1;
   }
}

message Family{
   repeated Person p =1;
}

使用protobuf下的compile来编译，会生成java代码：

Google protobuffer序列化工具使用以及与idea集成

编写测试类，来使用序列化与反序列化

package com.heavy.learn.protobuffer;

import com.google.protobuf.InvalidProtocolBufferException;
 
import java.util.List;
 

public class ProtoTest {

    public static void main(String[] args) {
        PersonPB.Person.Builder person = PersonPB.Person.newBuilder();
        person.setAge(12);
        person.setId(1);
        person.setName("Jacky");
        person.setExam(0,2.3f);
        person.setExam(1,2.4f);
        //设置map
        person.putMap("a",null);

        PersonPB.Family.Builder fa = PersonPB.Family.newBuilder();
        fa.addP(person);

        System.out.println(person);
        //序列化
        PersonPB.Person pinfo = person.build();
        byte[] barr = pinfo.toByteArray();
        System.out.println(barr.length);

        try {
            //反序列化
            PersonPB.Person p= PersonPB.Person.parseFrom(barr);
            System.out.println(p);
            //获取list
            p.getExamList();

            PersonPB.Family f = PersonPB.Family.parseFrom(fa.build().toByteArray());
            List<PersonPB.Person> list = f.getPList();
            for(PersonPB.Person px : list){
                System.out.println(px.getAge());
            }

        } catch (InvalidProtocolBufferException e) {
            e.printStackTrace();
        }
    }

}

Google protobuffer序列化工具使用以及与idea集成

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