protobuf生成java代码

protobuf官方包下载：https://github.com/protocolbuffers/protobuf/releases/tag/v3.11.1

1、Idea中安装protobuf插件，重启Idea

2、idea中新建maven项目protobuf-demo

3、pom.xml中添加如下依赖

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
    <dependency>
        <groupId>com.google.protobuf</groupId>
        <artifactId>protobuf-java</artifactId>
        <version>3.6.1</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.13</version>
        <scope>test</scope>
    </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>

4、在idea中编写proto文件,目录结构如下

内容如下：

syntax = "proto3";
option java_package = "com.black.model";
option java_outer_classname = "PersonModel";
message Person {
    int32 id = 1;
    string name = 2;
    string email = 3;
}
5、生成java

6、测试代码

public class PersonModelTest {
    public static void main(String[] args) throws InvalidProtocolBufferException {
        PersonModel.Person.Builder builder= PersonModel.Person.newBuilder();
        builder.setId(1);
        builder.setEmail("lee@sunvalley.com.cn");
        builder.setName("lee");

        PersonModel.Person person= builder.build();
        System.out.print("====before===="+person);
        System.out.println("==================");
        for(Byte b:person.toByteArray()){
            System.out.print(b);
        }
        System.out.println("==================");
        byte[] byteArray= person.toByteArray();
        PersonModel.Person p2 = PersonModel.Person.parseFrom(byteArray);
        System.out.println("=========反序列化生成对象,转换之后==========");
        System.out.println(p2.getId()+","+p2.getEmail()+","+p2.getName());
    }
}

来源：CSDN

作者：Black10086

链接：https://blog.csdn.net/ls_call520/article/details/103888346

标签

protobuf