idea+maven根据.proto文件生成Java代码

通过maven工具，将.proto文件转成java文件

• 1、在idea的main目录下，新建一个文件夹为proto，并右键文件夹，选择Mark Directory As ->Resources Root，并将.proto文件copy到proto文件夹下。

  
  image-20200221153834144.png

• 2、在pom.xml文件里，添加

  <properties>
    <grpc.version>1.6.1</grpc.version>
    <protobuf.version>3.3.0</protobuf.version>
  </properties>
  

  <dependency>
              <groupId>io.grpc</groupId>
              <artifactId>grpc-netty</artifactId>
              <version>${grpc.version}</version>
              <scope>provided</scope>
          </dependency>
          <dependency>
              <groupId>io.grpc</groupId>
              <artifactId>grpc-protobuf</artifactId>
              <version>${grpc.version}</version>
              <scope>provided</scope>
          </dependency>
          <dependency>
              <groupId>io.grpc</groupId>
              <artifactId>grpc-stub</artifactId>
              <version>${grpc.version}</version>
              <scope>provided</scope>
          </dependency>
          <dependency>
              <groupId>com.google.protobuf</groupId>
              <artifactId>protobuf-java</artifactId>
              <version>${protobuf.version}</version>
  </dependency>
  

  <build>
          <extensions>
              <extension>//这个必须添加，否则plugin下的${os.detected.classifier}可能会报错
                  <groupId>kr.motd.maven</groupId>
                  <artifactId>os-maven-plugin</artifactId>
                  <version>1.6.1</version>
              </extension>
          </extensions>
          
          <plugins>
  
              <plugin>
                  <groupId>org.springframework.boot</groupId>
                  <artifactId>spring-boot-maven-plugin</artifactId>
                  <dependencies>
                      <dependency>
                          <groupId>org.springframework</groupId>
                          <artifactId>springloaded</artifactId>
                          <version>1.2.5.RELEASE</version>
                      </dependency>
                  </dependencies>
              </plugin>
              <plugin><!-- 组件 -->
                  <groupId>org.xolstice.maven.plugins</groupId>
                  <artifactId>protobuf-maven-plugin</artifactId>
                  <version>0.5.0</version>
                  <configuration>
                      <protoSourceRoot>${basedir}/src/main/proto</protoSourceRoot>
                      <protocArtifact>com.google.protobuf:protoc:${protobuf.version}:exe:${os.detected.classifier}</protocArtifact>
                      <pluginId>grpc-java</pluginId>
                      <pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}</pluginArtifact>
                  </configuration>
                  <executions>
                      <execution>
                          <goals>
                              <goal>compile</goal>
                              <goal>compile-custom</goal>
                          </goals>
                      </execution>
                  </executions>
              </plugin>
              
          </plugins>
      </build>
  

• 3、待maven加载完成之后，可在侧边的maven内看到如下plugins，点击运行compile即可将.proto文件转成java文件。

  image-20200221154454288.png

• 4、最后，在target\generated-sources\protobuf目录下，即可看到java文件。