maven项目中根据proto文件生成java文件

1、proto文件要放到 src/main/proto目录里。

2、proto中指定一下生成的类所在的包名，如：option java_package = "com.demo.service.grpc";

3、生成的java文件在 target/generated-sources/protobuf目录下

 

PS：以上proto文件所在目录，和生成的java所在目录，可以在插件中更改。

 

正文：只需要在maven项目的pom.xml文件中增加以下内容即可！

 

    <!-- 定义依赖的版本 -->
    <properties>
        <grpc.version>1.31.1</grpc.version>
        <protobuf.version>3.22.2</protobuf.version>
    </properties>
	
	<!-- 定义grpc相关的依赖 -->
	<dependencies>
		<dependency>
            <groupId>io.grpc</groupId>
            <artifactId>grpc-netty</artifactId>
            <version>${grpc.version}</version>
        </dependency>
        <dependency>
            <groupId>io.grpc</groupId>
            <artifactId>grpc-protobuf</artifactId>
            <version>${grpc.version}</version>
        </dependency>
        <dependency>
            <groupId>io.grpc</groupId>
            <artifactId>grpc-stub</artifactId>
            <version>${grpc.version}</version>
        </dependency>
        <dependency>
            <groupId>com.google.protobuf</groupId>
            <artifactId>protobuf-java</artifactId>
            <version>${protobuf.version}</version>
        </dependency>
	</dependencies>

	<!-- 定义需要运行的依赖的插件 -->
	<build>
        <extensions>
            <extension>
                <groupId>kr.motd.maven</groupId>
                <artifactId>os-maven-plugin</artifactId>
                <version>1.6.2</version>
            </extension>
        </extensions>
        <plugins>
            <plugin>
                <groupId>org.xolstice.maven.plugins</groupId>
                <artifactId>protobuf-maven-plugin</artifactId>
                <version>0.6.1</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                            <goal>compile-custom</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <protocArtifact>com.google.protobuf:protoc:3.12.0:exe:${os.detected.classifier}</protocArtifact>
                    <pluginId>grpc-java</pluginId>
                    <pluginArtifact>io.grpc:protoc-gen-grpc-java:1.32.1:exe:${os.detected.classifier}</pluginArtifact>
                    <protoSourceRoot>${project.basedir}/src/main/proto</protoSourceRoot>
                    <outputDirectory>${project.build.directory}/generated-sources/protobuf/java</outputDirectory>
                    <clearOutputDirectory>false</clearOutputDirectory>
                </configuration>
            </plugin>
        </plugins>
    </build>