Java 使用 Protobuf

示例

1、编写 gps_data.proto 描述文件

  1. syntax = "proto3";
  2. option java_package = "com.twx.learn.protobuf.proto";
  3. option java_outer_classname = "GpsDataProto";
  4. message gps_data {
  5. int64 id = 1;
  6. string terminalId = 2;
  7. string dataTime = 3;
  8. double lon = 4;
  9. double lat = 5;
  10. float speed = 6;
  11. int32 altitude = 7;
  12. int32 locType = 8;
  13. int32 gpsStatus = 9;
  14. float direction = 10;
  15. int32 satellite = 11;
  16. }
  • java_outer_classname 最后输出的Java类名
  • java_package 声明java包

Int64 int32 string`这些proto类型与Java类型的对应关系,参考附注。

2、mac 安装protobuf

brew install protobuf

3、使用protoc 编译proto,转成java代码

protoc -I=src/main/resources/proto —java_out=src/main/java gps_data.proto

  • -I 后面是 proto 文件所在目录
  • —java_out 后面是 java 文件存放地址
  • 最后一行是 proto 文件名称

执行命令后,结构图如下:

Java 使用 Protobuf - 图1

4、接下来,我们使用生成的GpsDataProto来序列化和反序列化,引入依赖:

  1. <dependency>
  2. <groupId>com.google.protobuf</groupId>
  3. <artifactId>protobuf-java</artifactId>
  4. <version>3.12.1</version>
  5. </dependency>

5、编写测试类:

package com.twx.learn.protobuf;

import com.google.protobuf.InvalidProtocolBufferException;
import com.twx.learn.protobuf.proto.GpsDataProto;

/**
 * @author tangwx@soyuan.com.cn
 * @date 2020/5/29 10:35
 */
public class App {
    public static void main(String[] args) {
        System.out.println("===== 构建一个GPS模型开始 =====");
        GpsDataProto.gps_data.Builder gps_builder = GpsDataProto.gps_data.newBuilder();
        gps_builder.setAltitude(1);
        gps_builder.setDataTime("2017-12-17 16:21:44");
        gps_builder.setGpsStatus(1);
        gps_builder.setLat(39.123);
        gps_builder.setLon(120.112);
        gps_builder.setDirection(30.2F);
        gps_builder.setId(100L);

        GpsDataProto.gps_data gps_data = gps_builder.build();
        System.out.println(gps_data.toString());
        System.out.println("===== 构建GPS模型结束 =====");

        System.out.println("===== gps Byte 开始=====");
        for (byte b : gps_data.toByteArray()) {
            System.out.print(b);
        }
        System.out.println("\n" + "bytes长度" + gps_data.toByteString().size());
        System.out.println("===== gps Byte 结束 =====");

        System.out.println("===== 使用gps 反序列化生成对象开始 =====");
        GpsDataProto.gps_data gd = null;
        try {
            gd = GpsDataProto.gps_data.parseFrom(gps_data.toByteArray());
        } catch (InvalidProtocolBufferException e) {
            e.printStackTrace();
        }
        System.out.print(gd.toString());
        System.out.println("===== 使用gps 反序列化生成对象结束 =====");
    }
}

输出结果:

===== 构建一个GPS模型开始 =====
id: 100
dataTime: "2017-12-17 16:21:44"
lon: 120.112
lat: 39.123
altitude: 1
gpsStatus: 1
direction: 30.2

===== 构建GPS模型结束 =====
===== gps Byte 开始=====
810026195048495545495045495532495458504958525233-707312243794644157-76-56118-66-113676456172185-102-103-1565
bytes长度50
===== gps Byte 结束 =====
===== 使用gps 反序列化生成对象开始 =====
id: 100
dataTime: "2017-12-17 16:21:44"
lon: 120.112
lat: 39.123
altitude: 1
gpsStatus: 1
direction: 30.2
===== 使用gps 反序列化生成对象结束 =====

附注

proto类型—>java类型

Java 使用 Protobuf - 图2

GpsDataProto

因为生成的GpsDataProto有点长,所以在最后贴出

// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: gps_data.proto

package com.twx.learn.protobuf.proto;

public final class GpsDataProto {
  private GpsDataProto() {}
  public static void registerAllExtensions(
      com.google.protobuf.ExtensionRegistryLite registry) {
  }

  public static void registerAllExtensions(
      com.google.protobuf.ExtensionRegistry registry) {
    registerAllExtensions(
        (com.google.protobuf.ExtensionRegistryLite) registry);
  }
  public interface gps_dataOrBuilder extends
      // @@protoc_insertion_point(interface_extends:gps_data)
      com.google.protobuf.MessageOrBuilder {

    /**
     * <code>int64 id = 1;</code>
     * @return The id.
     */
    long getId();

    /**
     * <code>string terminalId = 2;</code>
     * @return The terminalId.
     */
    java.lang.String getTerminalId();
    /**
     * <code>string terminalId = 2;</code>
     * @return The bytes for terminalId.
     */
    com.google.protobuf.ByteString
        getTerminalIdBytes();

    /**
     * <code>string dataTime = 3;</code>
     * @return The dataTime.
     */
    java.lang.String getDataTime();
    /**
     * <code>string dataTime = 3;</code>
     * @return The bytes for dataTime.
     */
    com.google.protobuf.ByteString
        getDataTimeBytes();

    /**
     * <code>double lon = 4;</code>
     * @return The lon.
     */
    double getLon();

    /**
     * <code>double lat = 5;</code>
     * @return The lat.
     */
    double getLat();

    /**
     * <code>float speed = 6;</code>
     * @return The speed.
     */
    float getSpeed();

    /**
     * <code>int32 altitude = 7;</code>
     * @return The altitude.
     */
    int getAltitude();

    /**
     * <code>int32 locType = 8;</code>
     * @return The locType.
     */
    int getLocType();

    /**
     * <code>int32 gpsStatus = 9;</code>
     * @return The gpsStatus.
     */
    int getGpsStatus();

    /**
     * <code>float direction = 10;</code>
     * @return The direction.
     */
    float getDirection();

    /**
     * <code>int32 satellite = 11;</code>
     * @return The satellite.
     */
    int getSatellite();
  }
  /**
   * Protobuf type {@code gps_data}
   */
  public  static final class gps_data extends
      com.google.protobuf.GeneratedMessageV3 implements
      // @@protoc_insertion_point(message_implements:gps_data)
      gps_dataOrBuilder {
  private static final long serialVersionUID = 0L;
    // Use gps_data.newBuilder() to construct.
    private gps_data(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
      super(builder);
    }
    private gps_data() {
      terminalId_ = "";
      dataTime_ = "";
    }

    @java.lang.Override
    @SuppressWarnings({"unused"})
    protected java.lang.Object newInstance(
        UnusedPrivateParameter unused) {
      return new gps_data();
    }

    @java.lang.Override
    public final com.google.protobuf.UnknownFieldSet
    getUnknownFields() {
      return this.unknownFields;
    }
    private gps_data(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      this();
      if (extensionRegistry == null) {
        throw new java.lang.NullPointerException();
      }
      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
          com.google.protobuf.UnknownFieldSet.newBuilder();
      try {
        boolean done = false;
        while (!done) {
          int tag = input.readTag();
          switch (tag) {
            case 0:
              done = true;
              break;
            case 8: {

              id_ = input.readInt64();
              break;
            }
            case 18: {
              java.lang.String s = input.readStringRequireUtf8();

              terminalId_ = s;
              break;
            }
            case 26: {
              java.lang.String s = input.readStringRequireUtf8();

              dataTime_ = s;
              break;
            }
            case 33: {

              lon_ = input.readDouble();
              break;
            }
            case 41: {

              lat_ = input.readDouble();
              break;
            }
            case 53: {

              speed_ = input.readFloat();
              break;
            }
            case 56: {

              altitude_ = input.readInt32();
              break;
            }
            case 64: {

              locType_ = input.readInt32();
              break;
            }
            case 72: {

              gpsStatus_ = input.readInt32();
              break;
            }
            case 85: {

              direction_ = input.readFloat();
              break;
            }
            case 88: {

              satellite_ = input.readInt32();
              break;
            }
            default: {
              if (!parseUnknownField(
                  input, unknownFields, extensionRegistry, tag)) {
                done = true;
              }
              break;
            }
          }
        }
      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
        throw e.setUnfinishedMessage(this);
      } catch (java.io.IOException e) {
        throw new com.google.protobuf.InvalidProtocolBufferException(
            e).setUnfinishedMessage(this);
      } finally {
        this.unknownFields = unknownFields.build();
        makeExtensionsImmutable();
      }
    }
    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return com.twx.learn.protobuf.proto.GpsDataProto.internal_static_gps_data_descriptor;
    }

    @java.lang.Override
    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
        internalGetFieldAccessorTable() {
      return com.twx.learn.protobuf.proto.GpsDataProto.internal_static_gps_data_fieldAccessorTable
          .ensureFieldAccessorsInitialized(
              com.twx.learn.protobuf.proto.GpsDataProto.gps_data.class, com.twx.learn.protobuf.proto.GpsDataProto.gps_data.Builder.class);
    }

    public static final int ID_FIELD_NUMBER = 1;
    private long id_;
    /**
     * <code>int64 id = 1;</code>
     * @return The id.
     */
    public long getId() {
      return id_;
    }

    public static final int TERMINALID_FIELD_NUMBER = 2;
    private volatile java.lang.Object terminalId_;
    /**
     * <code>string terminalId = 2;</code>
     * @return The terminalId.
     */
    public java.lang.String getTerminalId() {
      java.lang.Object ref = terminalId_;
      if (ref instanceof java.lang.String) {
        return (java.lang.String) ref;
      } else {
        com.google.protobuf.ByteString bs = 
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        terminalId_ = s;
        return s;
      }
    }
    /**
     * <code>string terminalId = 2;</code>
     * @return The bytes for terminalId.
     */
    public com.google.protobuf.ByteString
        getTerminalIdBytes() {
      java.lang.Object ref = terminalId_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        terminalId_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    public static final int DATATIME_FIELD_NUMBER = 3;
    private volatile java.lang.Object dataTime_;
    /**
     * <code>string dataTime = 3;</code>
     * @return The dataTime.
     */
    public java.lang.String getDataTime() {
      java.lang.Object ref = dataTime_;
      if (ref instanceof java.lang.String) {
        return (java.lang.String) ref;
      } else {
        com.google.protobuf.ByteString bs = 
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        dataTime_ = s;
        return s;
      }
    }
    /**
     * <code>string dataTime = 3;</code>
     * @return The bytes for dataTime.
     */
    public com.google.protobuf.ByteString
        getDataTimeBytes() {
      java.lang.Object ref = dataTime_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        dataTime_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    public static final int LON_FIELD_NUMBER = 4;
    private double lon_;
    /**
     * <code>double lon = 4;</code>
     * @return The lon.
     */
    public double getLon() {
      return lon_;
    }

    public static final int LAT_FIELD_NUMBER = 5;
    private double lat_;
    /**
     * <code>double lat = 5;</code>
     * @return The lat.
     */
    public double getLat() {
      return lat_;
    }

    public static final int SPEED_FIELD_NUMBER = 6;
    private float speed_;
    /**
     * <code>float speed = 6;</code>
     * @return The speed.
     */
    public float getSpeed() {
      return speed_;
    }

    public static final int ALTITUDE_FIELD_NUMBER = 7;
    private int altitude_;
    /**
     * <code>int32 altitude = 7;</code>
     * @return The altitude.
     */
    public int getAltitude() {
      return altitude_;
    }

    public static final int LOCTYPE_FIELD_NUMBER = 8;
    private int locType_;
    /**
     * <code>int32 locType = 8;</code>
     * @return The locType.
     */
    public int getLocType() {
      return locType_;
    }

    public static final int GPSSTATUS_FIELD_NUMBER = 9;
    private int gpsStatus_;
    /**
     * <code>int32 gpsStatus = 9;</code>
     * @return The gpsStatus.
     */
    public int getGpsStatus() {
      return gpsStatus_;
    }

    public static final int DIRECTION_FIELD_NUMBER = 10;
    private float direction_;
    /**
     * <code>float direction = 10;</code>
     * @return The direction.
     */
    public float getDirection() {
      return direction_;
    }

    public static final int SATELLITE_FIELD_NUMBER = 11;
    private int satellite_;
    /**
     * <code>int32 satellite = 11;</code>
     * @return The satellite.
     */
    public int getSatellite() {
      return satellite_;
    }

    private byte memoizedIsInitialized = -1;
    @java.lang.Override
    public final boolean isInitialized() {
      byte isInitialized = memoizedIsInitialized;
      if (isInitialized == 1) return true;
      if (isInitialized == 0) return false;

      memoizedIsInitialized = 1;
      return true;
    }

    @java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output)
                        throws java.io.IOException {
      if (id_ != 0L) {
        output.writeInt64(1, id_);
      }
      if (!getTerminalIdBytes().isEmpty()) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 2, terminalId_);
      }
      if (!getDataTimeBytes().isEmpty()) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 3, dataTime_);
      }
      if (lon_ != 0D) {
        output.writeDouble(4, lon_);
      }
      if (lat_ != 0D) {
        output.writeDouble(5, lat_);
      }
      if (speed_ != 0F) {
        output.writeFloat(6, speed_);
      }
      if (altitude_ != 0) {
        output.writeInt32(7, altitude_);
      }
      if (locType_ != 0) {
        output.writeInt32(8, locType_);
      }
      if (gpsStatus_ != 0) {
        output.writeInt32(9, gpsStatus_);
      }
      if (direction_ != 0F) {
        output.writeFloat(10, direction_);
      }
      if (satellite_ != 0) {
        output.writeInt32(11, satellite_);
      }
      unknownFields.writeTo(output);
    }

    @java.lang.Override
    public int getSerializedSize() {
      int size = memoizedSize;
      if (size != -1) return size;

      size = 0;
      if (id_ != 0L) {
        size += com.google.protobuf.CodedOutputStream
          .computeInt64Size(1, id_);
      }
      if (!getTerminalIdBytes().isEmpty()) {
        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, terminalId_);
      }
      if (!getDataTimeBytes().isEmpty()) {
        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, dataTime_);
      }
      if (lon_ != 0D) {
        size += com.google.protobuf.CodedOutputStream
          .computeDoubleSize(4, lon_);
      }
      if (lat_ != 0D) {
        size += com.google.protobuf.CodedOutputStream
          .computeDoubleSize(5, lat_);
      }
      if (speed_ != 0F) {
        size += com.google.protobuf.CodedOutputStream
          .computeFloatSize(6, speed_);
      }
      if (altitude_ != 0) {
        size += com.google.protobuf.CodedOutputStream
          .computeInt32Size(7, altitude_);
      }
      if (locType_ != 0) {
        size += com.google.protobuf.CodedOutputStream
          .computeInt32Size(8, locType_);
      }
      if (gpsStatus_ != 0) {
        size += com.google.protobuf.CodedOutputStream
          .computeInt32Size(9, gpsStatus_);
      }
      if (direction_ != 0F) {
        size += com.google.protobuf.CodedOutputStream
          .computeFloatSize(10, direction_);
      }
      if (satellite_ != 0) {
        size += com.google.protobuf.CodedOutputStream
          .computeInt32Size(11, satellite_);
      }
      size += unknownFields.getSerializedSize();
      memoizedSize = size;
      return size;
    }

    @java.lang.Override
    public boolean equals(final java.lang.Object obj) {
      if (obj == this) {
       return true;
      }
      if (!(obj instanceof com.twx.learn.protobuf.proto.GpsDataProto.gps_data)) {
        return super.equals(obj);
      }
      com.twx.learn.protobuf.proto.GpsDataProto.gps_data other = (com.twx.learn.protobuf.proto.GpsDataProto.gps_data) obj;

      if (getId()
          != other.getId()) return false;
      if (!getTerminalId()
          .equals(other.getTerminalId())) return false;
      if (!getDataTime()
          .equals(other.getDataTime())) return false;
      if (java.lang.Double.doubleToLongBits(getLon())
          != java.lang.Double.doubleToLongBits(
              other.getLon())) return false;
      if (java.lang.Double.doubleToLongBits(getLat())
          != java.lang.Double.doubleToLongBits(
              other.getLat())) return false;
      if (java.lang.Float.floatToIntBits(getSpeed())
          != java.lang.Float.floatToIntBits(
              other.getSpeed())) return false;
      if (getAltitude()
          != other.getAltitude()) return false;
      if (getLocType()
          != other.getLocType()) return false;
      if (getGpsStatus()
          != other.getGpsStatus()) return false;
      if (java.lang.Float.floatToIntBits(getDirection())
          != java.lang.Float.floatToIntBits(
              other.getDirection())) return false;
      if (getSatellite()
          != other.getSatellite()) return false;
      if (!unknownFields.equals(other.unknownFields)) return false;
      return true;
    }

    @java.lang.Override
    public int hashCode() {
      if (memoizedHashCode != 0) {
        return memoizedHashCode;
      }
      int hash = 41;
      hash = (19 * hash) + getDescriptor().hashCode();
      hash = (37 * hash) + ID_FIELD_NUMBER;
      hash = (53 * hash) + com.google.protobuf.Internal.hashLong(
          getId());
      hash = (37 * hash) + TERMINALID_FIELD_NUMBER;
      hash = (53 * hash) + getTerminalId().hashCode();
      hash = (37 * hash) + DATATIME_FIELD_NUMBER;
      hash = (53 * hash) + getDataTime().hashCode();
      hash = (37 * hash) + LON_FIELD_NUMBER;
      hash = (53 * hash) + com.google.protobuf.Internal.hashLong(
          java.lang.Double.doubleToLongBits(getLon()));
      hash = (37 * hash) + LAT_FIELD_NUMBER;
      hash = (53 * hash) + com.google.protobuf.Internal.hashLong(
          java.lang.Double.doubleToLongBits(getLat()));
      hash = (37 * hash) + SPEED_FIELD_NUMBER;
      hash = (53 * hash) + java.lang.Float.floatToIntBits(
          getSpeed());
      hash = (37 * hash) + ALTITUDE_FIELD_NUMBER;
      hash = (53 * hash) + getAltitude();
      hash = (37 * hash) + LOCTYPE_FIELD_NUMBER;
      hash = (53 * hash) + getLocType();
      hash = (37 * hash) + GPSSTATUS_FIELD_NUMBER;
      hash = (53 * hash) + getGpsStatus();
      hash = (37 * hash) + DIRECTION_FIELD_NUMBER;
      hash = (53 * hash) + java.lang.Float.floatToIntBits(
          getDirection());
      hash = (37 * hash) + SATELLITE_FIELD_NUMBER;
      hash = (53 * hash) + getSatellite();
      hash = (29 * hash) + unknownFields.hashCode();
      memoizedHashCode = hash;
      return hash;
    }

    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseFrom(
        java.nio.ByteBuffer data)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseFrom(
        java.nio.ByteBuffer data,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data, extensionRegistry);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseFrom(
        com.google.protobuf.ByteString data)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseFrom(
        com.google.protobuf.ByteString data,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data, extensionRegistry);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseFrom(byte[] data)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseFrom(
        byte[] data,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data, extensionRegistry);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseFrom(java.io.InputStream input)
        throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3
          .parseWithIOException(PARSER, input);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseFrom(
        java.io.InputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3
          .parseWithIOException(PARSER, input, extensionRegistry);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseDelimitedFrom(java.io.InputStream input)
        throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3
          .parseDelimitedWithIOException(PARSER, input);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseDelimitedFrom(
        java.io.InputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3
          .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseFrom(
        com.google.protobuf.CodedInputStream input)
        throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3
          .parseWithIOException(PARSER, input);
    }
    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data parseFrom(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3
          .parseWithIOException(PARSER, input, extensionRegistry);
    }

    @java.lang.Override
    public Builder newBuilderForType() { return newBuilder(); }
    public static Builder newBuilder() {
      return DEFAULT_INSTANCE.toBuilder();
    }
    public static Builder newBuilder(com.twx.learn.protobuf.proto.GpsDataProto.gps_data prototype) {
      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
    }
    @java.lang.Override
    public Builder toBuilder() {
      return this == DEFAULT_INSTANCE
          ? new Builder() : new Builder().mergeFrom(this);
    }

    @java.lang.Override
    protected Builder newBuilderForType(
        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
      Builder builder = new Builder(parent);
      return builder;
    }
    /**
     * Protobuf type {@code gps_data}
     */
    public static final class Builder extends
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        terminalId_ = "";

        dataTime_ = "";

        lon_ = 0D;

        lat_ = 0D;

        speed_ = 0F;

        altitude_ = 0;

        locType_ = 0;

        gpsStatus_ = 0;

        direction_ = 0F;

        satellite_ = 0;

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        result.lon_ = lon_;
        result.lat_ = lat_;
        result.speed_ = speed_;
        result.altitude_ = altitude_;
        result.locType_ = locType_;
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        result.satellite_ = satellite_;
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       * <code>string dataTime = 3;</code>
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       * @return This builder for chaining.
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        if (value == null) {
    throw new NullPointerException();
  }

        dataTime_ = value;
        onChanged();
        return this;
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       * <code>string dataTime = 3;</code>
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        dataTime_ = getDefaultInstance().getDataTime();
        onChanged();
        return this;
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       * <code>string dataTime = 3;</code>
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       * @return This builder for chaining.
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        if (value == null) {
    throw new NullPointerException();
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  checkByteStringIsUtf8(value);

        dataTime_ = value;
        onChanged();
        return this;
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      private double lon_ ;
      /**
       * <code>double lon = 4;</code>
       * @return The lon.
       */
      public double getLon() {
        return lon_;
      }
      /**
       * <code>double lon = 4;</code>
       * @param value The lon to set.
       * @return This builder for chaining.
       */
      public Builder setLon(double value) {

        lon_ = value;
        onChanged();
        return this;
      }
      /**
       * <code>double lon = 4;</code>
       * @return This builder for chaining.
       */
      public Builder clearLon() {

        lon_ = 0D;
        onChanged();
        return this;
      }

      private double lat_ ;
      /**
       * <code>double lat = 5;</code>
       * @return The lat.
       */
      public double getLat() {
        return lat_;
      }
      /**
       * <code>double lat = 5;</code>
       * @param value The lat to set.
       * @return This builder for chaining.
       */
      public Builder setLat(double value) {

        lat_ = value;
        onChanged();
        return this;
      }
      /**
       * <code>double lat = 5;</code>
       * @return This builder for chaining.
       */
      public Builder clearLat() {

        lat_ = 0D;
        onChanged();
        return this;
      }

      private float speed_ ;
      /**
       * <code>float speed = 6;</code>
       * @return The speed.
       */
      public float getSpeed() {
        return speed_;
      }
      /**
       * <code>float speed = 6;</code>
       * @param value The speed to set.
       * @return This builder for chaining.
       */
      public Builder setSpeed(float value) {

        speed_ = value;
        onChanged();
        return this;
      }
      /**
       * <code>float speed = 6;</code>
       * @return This builder for chaining.
       */
      public Builder clearSpeed() {

        speed_ = 0F;
        onChanged();
        return this;
      }

      private int altitude_ ;
      /**
       * <code>int32 altitude = 7;</code>
       * @return The altitude.
       */
      public int getAltitude() {
        return altitude_;
      }
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       * <code>int32 altitude = 7;</code>
       * @param value The altitude to set.
       * @return This builder for chaining.
       */
      public Builder setAltitude(int value) {

        altitude_ = value;
        onChanged();
        return this;
      }
      /**
       * <code>int32 altitude = 7;</code>
       * @return This builder for chaining.
       */
      public Builder clearAltitude() {

        altitude_ = 0;
        onChanged();
        return this;
      }

      private int locType_ ;
      /**
       * <code>int32 locType = 8;</code>
       * @return The locType.
       */
      public int getLocType() {
        return locType_;
      }
      /**
       * <code>int32 locType = 8;</code>
       * @param value The locType to set.
       * @return This builder for chaining.
       */
      public Builder setLocType(int value) {

        locType_ = value;
        onChanged();
        return this;
      }
      /**
       * <code>int32 locType = 8;</code>
       * @return This builder for chaining.
       */
      public Builder clearLocType() {

        locType_ = 0;
        onChanged();
        return this;
      }

      private int gpsStatus_ ;
      /**
       * <code>int32 gpsStatus = 9;</code>
       * @return The gpsStatus.
       */
      public int getGpsStatus() {
        return gpsStatus_;
      }
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       * <code>int32 gpsStatus = 9;</code>
       * @param value The gpsStatus to set.
       * @return This builder for chaining.
       */
      public Builder setGpsStatus(int value) {

        gpsStatus_ = value;
        onChanged();
        return this;
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       * <code>int32 gpsStatus = 9;</code>
       * @return This builder for chaining.
       */
      public Builder clearGpsStatus() {

        gpsStatus_ = 0;
        onChanged();
        return this;
      }

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      /**
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       * @return The direction.
       */
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        return direction_;
      }
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       * <code>float direction = 10;</code>
       * @param value The direction to set.
       * @return This builder for chaining.
       */
      public Builder setDirection(float value) {

        direction_ = value;
        onChanged();
        return this;
      }
      /**
       * <code>float direction = 10;</code>
       * @return This builder for chaining.
       */
      public Builder clearDirection() {

        direction_ = 0F;
        onChanged();
        return this;
      }

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       * <code>int32 satellite = 11;</code>
       * @return The satellite.
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      public int getSatellite() {
        return satellite_;
      }
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       * <code>int32 satellite = 11;</code>
       * @param value The satellite to set.
       * @return This builder for chaining.
       */
      public Builder setSatellite(int value) {

        satellite_ = value;
        onChanged();
        return this;
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       * @return This builder for chaining.
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      // @@protoc_insertion_point(builder_scope:gps_data)
    }

    // @@protoc_insertion_point(class_scope:gps_data)
    private static final com.twx.learn.protobuf.proto.GpsDataProto.gps_data DEFAULT_INSTANCE;
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    public static com.twx.learn.protobuf.proto.GpsDataProto.gps_data getDefaultInstance() {
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          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws com.google.protobuf.InvalidProtocolBufferException {
        return new gps_data(input, extensionRegistry);
      }
    };

    public static com.google.protobuf.Parser<gps_data> parser() {
      return PARSER;
    }

    @java.lang.Override
    public com.google.protobuf.Parser<gps_data> getParserForType() {
      return PARSER;
    }

    @java.lang.Override
    public com.twx.learn.protobuf.proto.GpsDataProto.gps_data getDefaultInstanceForType() {
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    }

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      "\003\022\022\n\nterminalId\030\002 \001(\t\022\020\n\010dataTime\030\003 \001(\t\022" +
      "\013\n\003lon\030\004 \001(\001\022\013\n\003lat\030\005 \001(\001\022\r\n\005speed\030\006 \001(\002" +
      "\022\020\n\010altitude\030\007 \001(\005\022\017\n\007locType\030\010 \001(\005\022\021\n\tg" +
      "psStatus\030\t \001(\005\022\021\n\tdirection\030\n \001(\002\022\021\n\tsat" +
      "ellite\030\013 \001(\005B,\n\034com.twx.learn.protobuf.p" +
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  }

  // @@protoc_insertion_point(outer_class_scope)
}