protobuf 使用和介绍

阳光穿透心脏的1/2处 2021-09-22 01:10 447阅读 0赞

介绍

[Protobuf 有没有比 JSON 快 5 倍？-InfoQ][Protobuf _ JSON _ 5 _-InfoQ]

[(3条消息) protobuf、thrift、avro对比\_wangqiang9x的博客-CSDN博客][3_ protobuf_thrift_avro_wangqiang9x_-CSDN]

[https://javazhiyin.blog.csdn.net/article/details/107373595][https_javazhiyin.blog.csdn.net_article_details_107373595]

使用

[Intellij IDEA中使用Protobuf的正确姿势 - 静若清池 - 博客园 (cnblogs.com)][Intellij IDEA_Protobuf_ - _ - _ _cnblogs.com]

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syntax="proto3";
    
    option java_package = "com.vince.xq";
    option java_multiple_files=true;
    option java_outer_classname="AddressBookProtos";
    
    
    message Student {
      int32 id = 1;
      string name = 2;
      string email = 3;
    }

pom 文件

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>org.example</groupId>
        <artifactId>test-maven</artifactId>
        <version>1.0-SNAPSHOT</version>
    
        <properties>
            <maven.compiler.source>8</maven.compiler.source>
            <maven.compiler.target>8</maven.compiler.target>
            <grpc.version>1.6.1</grpc.version>
            <protobuf.version>3.3.0</protobuf.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>1.2.76</version>
            </dependency>
    
            <dependency>
                <groupId>com.google.protobuf</groupId>
                <artifactId>protobuf-java</artifactId>
                <version>3.4.0</version>
            </dependency>
    
    
            <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>
    
        </dependencies>
    
    
        <build>
            <extensions>
                <extension>
                    <groupId>kr.motd.maven</groupId>
                    <artifactId>os-maven-plugin</artifactId>
                    <version>1.5.0.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:${protobuf.version}:exe:${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>
    
    </project>

点击compile

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将在target 中生成的java 文件拷贝到 com.vince.xq 下

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package com.vince.xq;
    
    public class StudentVo {
        private int id;
        private String name;
        private String email;
    
        public int getId() {
            return id;
        }
    
        public void setId(int id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public String getEmail() {
            return email;
        }
    
        public void setEmail(String email) {
            this.email = email;
        }
    }

package com.vince.xq;
    
    import com.alibaba.fastjson.JSONObject;
    import com.google.protobuf.InvalidProtocolBufferException;
    import com.google.protobuf.util.JsonFormat;
    
    import java.util.List;
    
    public class MavenTest {
        public static void main(String[] args) {
            //获取Student对象
            //这里的Student对象构造器被私有化,我们通过Student的内部类Builder来构建builder
            Student.Builder builder= Student.newBuilder();
            //通过Student的内部类builder提供了构建Student相关属性的set方法
            builder.setId(1);
            builder.setName("凌晨0点0分");
            builder.setEmail("31346337@qq.com");
            //序列化
            Student stu=builder.build();
            System.out.println("protobuf数据大小: " + stu.toByteString().size());
            //再将封装有数据的对象实例，转换为字节数组，用于数据传输、存储等
            byte[] stuByte = stu.toByteArray();
            //这里得到了stuBte字节数组后，我们可以将该数据进行数据传输或存储，这里至于用什么技术传输就根据具体情况而定
            //假如这里stuByt通过传输，下面的代码接到了该数据
            //接收方 ,这里为了方便我们就写在一个类里面
            //将字节数据反序列化为对应的对象实例
            Student student=null;
            try {
                student= Student.parseFrom(stuByte);
                //这里得到了Student实例了，就可以根据需要来操作里面的数据了
                System.out.println("学生ID:"+student.getId());
                System.out.println("姓名："+student.getName());
                System.out.println("email:"+student.getEmail());
            } catch (InvalidProtocolBufferException e) {
                e.printStackTrace();
            }
    
    
            /*如何快速的进行json格式化*/
            StudentVo studentVo=new StudentVo();
            studentVo.setId(1);
            studentVo.setName("凌晨0点0分");
            studentVo.setEmail("31346337@qq.com");
            //System.out.println("protobuf数据大小: " + studentVo.size());
    
            String jsonObject="";
            try {
                jsonObject= JSONObject.toJSONString(studentVo);
            } catch (Exception e) {
                System.out.println(1111);
            }
            System.out.println(jsonObject.toString());
            System.out.println("json数据大小: "+jsonObject.getBytes().length);
        }
    
    
    
    }

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[Protobuf _ JSON _ 5 _-InfoQ]: https://www.infoq.cn/article/json-is-5-times-faster-than-protobuf/
[3_ protobuf_thrift_avro_wangqiang9x_-CSDN]: https://blog.csdn.net/wangqiang9x/article/details/84750046
[https_javazhiyin.blog.csdn.net_article_details_107373595]: https://javazhiyin.blog.csdn.net/article/details/107373595
[Intellij IDEA_Protobuf_ - _ - _ _cnblogs.com]: https://www.cnblogs.com/liugh/p/7505533.html
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