xml文件是遥感数据的的头文件，希望从中提取时间区域等信息，Java小白，求大佬们教教怎么整
，头文件如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE GranuleMetaDataFile SYSTEM "http://ecsinfo.gsfc.nasa.gov/ECSInfo/ecsmetadata/dtds/DPL/ECS/ScienceGranuleMetadata.dtd">
<GranuleMetaDataFile>
<DTDVersion>1.0</DTDVersion>
<DataCenterId>EDC</DataCenterId>
<GranuleURMetaData>
<GranuleUR>SC:MOD13A2.005:2132545364</GranuleUR>
<DbID>2132545364</DbID>
<InsertTime>2014-06-11 02:11:28.496</InsertTime>
<LastUpdate>2014-06-12 02:11:37.037</LastUpdate>
<CollectionMetaData>
<ShortName>MOD13A2</ShortName>
<VersionID>5</VersionID>
</CollectionMetaData>
<DataFiles>
<DataFileContainer>
<DistributedFileName>MOD13A2.A2014145.h27v05.005.2014162030850.hdf</DistributedFileName>
<FileSize>16891955</FileSize>
<ChecksumType>CKSUM</ChecksumType>
<Checksum>1091827715</Checksum>
<ChecksumOrigin>DPLIngst</ChecksumOrigin>
</DataFileContainer>
</DataFiles>
<ECSDataGranule>
<SizeMBECSDataGranule>16.1094</SizeMBECSDataGranule>
<ReprocessingPlanned>further update is anticipated</ReprocessingPlanned>
<ReprocessingActual>reprocessed</ReprocessingActual>
<LocalGranuleID>MOD13A2.A2014145.h27v05.005.2014162030850.hdf</LocalGranuleID>
<DayNightFlag>Day</DayNightFlag>
<ProductionDateTime>2014-06-11 07:08:50.000</ProductionDateTime>
<LocalVersionID>5.2.2</LocalVersionID>
</ECSDataGranule>
<PGEVersionClass>
<PGEVersion>5.2.7</PGEVersion>
</PGEVersionClass>
<RangeDateTime>
<RangeEndingTime>23:59:59.000000</RangeEndingTime>
<RangeEndingDate>2014-06-09</RangeEndingDate>
<RangeBeginningTime>00:00:00.000000</RangeBeginningTime>
<RangeBeginningDate>2014-05-25</RangeBeginningDate>
</RangeDateTime>
<SpatialDomainContainer>
<HorizontalSpatialDomainContainer>
<GPolygon>
<Boundary>
<Point>
<PointLongitude>103.700805509875</PointLongitude>
<PointLatitude>29.9063240058583</PointLatitude>
</Point>
<Point>
<PointLongitude>117.356422833073</PointLongitude>
<PointLatitude>40.0849484191919</PointLatitude>
</Point>
<Point>
<PointLongitude>130.564483119946</PointLongitude>
<PointLatitude>39.998491208368</PointLatitude>
</Point>
<Point>
<PointLongitude>115.388076442344</PointLongitude>
<PointLatitude>29.8298156547937</PointLatitude>
</Point>
</Boundary>
</GPolygon>
</HorizontalSpatialDomainContainer>
</SpatialDomainContainer>
<MeasuredParameter>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days NDVI</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<OperationalQualityFlag>Passed</OperationalQualityFlag>
<OperationalQualityFlagExplanation>Passed</OperationalQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days EVI</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days VI Quality</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days red reflectance</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days NIR reflectance</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days blue reflectance</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days MIR reflectance</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days view zenith angle</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days sun zenith angle</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days relative azimuth angle</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days composite day of the year</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
<MeasuredParameterContainer>
<ParameterName>1 km 16 days pixel reliability</ParameterName>
<QAStats>
<QAPercentMissingData>0</QAPercentMissingData>
<QAPercentOutofBoundsData>0</QAPercentOutofBoundsData>
<QAPercentInterpolatedData>100</QAPercentInterpolatedData>
<QAPercentCloudCover>2</QAPercentCloudCover>
</QAStats>
<QAFlags>
<AutomaticQualityFlag>Passed</AutomaticQualityFlag>
<AutomaticQualityFlagExplanation>No automatic quality assessment is performed in the PGE</AutomaticQualityFlagExplanation>
<ScienceQualityFlag>Inferred Passed</ScienceQualityFlag>
<ScienceQualityFlagExplanation>http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/detailInfo.cgi?prod_id=MOD13A2&ver=C5.2014-06-12 02:11</ScienceQualityFlagExplanation>
</QAFlags>
</MeasuredParameterContainer>
</MeasuredParameter>
<Platform>
<PlatformShortName>Terra</PlatformShortName>
<Instrument>
<InstrumentShortName>MODIS</InstrumentShortName>
<Sensor>
<SensorShortName>MODIS</SensorShortName>
</Sensor>
</Instrument>
</Platform>
<PSAs>
<PSA>
<PSAName>QAPERCENTGOODQUALITY</PSAName>
<PSAValue>57</PSAValue>
</PSA>
<PSA>
<PSAName>QAPERCENTOTHERQUALITY</PSAName>
<PSAValue>43</PSAValue>
</PSA>
<PSA>
<PSAName>QAPERCENTNOTPRODUCEDCLOUD</PSAName>
<PSAValue>0</PSAValue>
</PSA>
<PSA>
<PSAName>QAPERCENTNOTPRODUCEDOTHER</PSAName>
<PSAValue>0</PSAValue>
</PSA>
<PSA>
<PSAName>NDVI1KM16DAYQCLASSPERCENTAGE</PSAName>
<PSAValue>0</PSAValue>
</PSA>
<PSA>
<PSAName>EVI1KM16DAYQCLASSPERCENTAGE</PSAName>
<PSAValue>0</PSAValue>
</PSA>
<PSA>
<PSAName>HORIZONTALTILENUMBER</PSAName>
<PSAValue>27</PSAValue>
</PSA>
<PSA>
<PSAName>VERTICALTILENUMBER</PSAName>
<PSAValue>05</PSAValue>
</PSA>
<PSA>
<PSAName>TileID</PSAName>
<PSAValue>51027005</PSAValue>
</PSA>
</PSAs>
<InputGranule>
<InputPointer>MODAGAGG.A2014145.h27v05.005.2014147020023.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014146.h27v05.005.2014148040040.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014147.h27v05.005.2014148191855.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014148.h27v05.005.2014150002959.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014149.h27v05.005.2014151014416.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014150.h27v05.005.2014152015220.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014151.h27v05.005.2014152142901.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014152.h27v05.005.2014154031330.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014153.h27v05.005.2014155023253.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014154.h27v05.005.2014156015817.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014155.h27v05.005.2014157021913.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014156.h27v05.005.2014158022626.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014157.h27v05.005.2014159020319.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014158.h27v05.005.2014160022748.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014159.h27v05.005.2014161023954.hdf</InputPointer>
<InputPointer>MODAGAGG.A2014160.h27v05.005.2014162014912.hdf</InputPointer>
</InputGranule>
<BrowseProduct>
<BrowseGranuleId>UR:10:DsShESDTUR:UR:15:DsShSciServerUR:13:[EDC:DSSDSRV]:24:BR:Browse.001:2132545365</BrowseGranuleId>
</BrowseProduct>
</GranuleURMetaData>
</GranuleMetaDataFile>
一般需要先根据xml先定义对应的实体类，然后解析xml文件，比如通过DOM方式，下面的列举了几种实现，可以参考下：
https://blog.csdn.net/zflovecf/article/details/78908788
可以使用XStream，不过你可能要先实验实验了解一下XStreamAlias（用户类或者字段上，可以设置别名），XStreamAsAttribute（作为节点属性，而不是节点下一级），XStreamImplicit（可以去除一些集合的显示，比如你在InputGranule加入List）注解，参考链接