protobuf java小栗子

近来在项目中发现用到了Protocol Buffers，作为netty传输的协议，通过写个例子进行感受下其高效的序列化和反序列化~

1. 所用环境windows ，语言java

下载生成器与对应版本的jar包
当前例子所用：protoc.exe， protobuf-java-2.4.1.jar

2. 编写proto文件，例子如下：

package org.demo.protobuf;option java_package = "org.demo.protobuf";option java_outer_classname = "MsgSendProto";message MsgSend {  required string msgID = 1;  required string phone = 2;  required int64 doneTime = 3;  required int32 enterpriseID = 4;  optional string enterpriseName = 5;  required int32 result = 6;  required int32 channelID = 7;  required int32 carrier = 8;  required int32 busyType = 9;  optional int32 size = 10;  optional int32 unit = 11;}

3. 在protoc.exe所在目录打开cmd，用以下命令执行编译刚刚编写proto文件，成功后无消息输出，在相应的目录下会产生java文件MsgSendProto.java

protoc.exe --java_out=./ MsgSend.proto

4. 在工程中导入protobuf-java-2.4.1.jar，编写个简单的测试类，感受下其序列化与反序列化~

public class MsgSendProtoBufTest {    public static void main(String[] args) {        // 先进行序列化        MsgSendProto.MsgSend.Builder builder = MsgSendProto.MsgSend.newBuilder();        builder.setMsgID("20151101");        builder.setPhone("13100000000");        builder.setDoneTime(System.currentTimeMillis());        builder.setEnterpriseID(1);        builder.setEnterpriseName("enterprise");        builder.setResult(1);        builder.setChannelID(1);        builder.setCarrier(1);        builder.setBusyType(1);        builder.setSize(5);        builder.setUnit(1);        MsgSendProto.MsgSend msgSend = builder.build();        byte[] buf = msgSend.toByteArray();        try {            // 再反序列化输出看看            MsgSendProto.MsgSend msgReceive = MsgSendProto.MsgSend.parseFrom(buf);            System.out.println(msgReceive.toString());        } catch (Exception e) {            e.printStackTrace();        }        System.out.println(buf);    }}

结果输出，表明能正常序列化与反序列化~