Read Sequencefile files with Lzo compression from HDFs

Read the Sequencefile file with Lzo compression from the HDFS using Java code import org.apache.hadoop.conf.Configuration; Import org.apache.hadoop.fs.*; Import org.apache.hadoop.io.*; Import java.io.*; Import java.util.*; /** * Created by LCC on 17-7-31. */public class Readweibo {public static void main (string] args) throws Exception {Revisit conf = new revisit (); Path seqfile = new Path ("/weibo/01"); Conf.set ("Io.compression.codecs", "Com.hadoop.compression.lzo.LzoCodec"); Conf.set ("Fs.default.name", "hdfs://lcc-desktop:9000"); FileSystem fs = Filesystem.get (conf); filestatus[] filestatuses = Fs.liststatus (seqfile); List L = new LinkedList (); int tmp = 0; for (int j = 0; J < Filestatuses.length J + +) {Sequencefile.reader Reader = new Sequencefile.reader (conf, SequenceFile.Reader.file (Filestatuses[j].getpath ()); Byteswritable key = new byteswritable (); Mapwritable value = new mapwritable (); while (Reader.next (key, value)) {//system.out.println (key); Set vs = Value.keyset (); Iterator it = Vs.iterator (); int i = 0; List outkey=new LinkedList (); while (It.hasnext ()) {writable Wt=it.next (); Outkey.add (wt.tostring ());//system.out.println (weibokey.length); It.next (); i = i + 1; } if (!l.contains (i)) {l.add (i);} TMP = tmp + 1; if (i==29) {iterator ok=outkey.iterator (); while (Ok.hasnext ()) {String oktmp=ok.next (); System.out.println (OKTMP); break; }}//system.out.println (TMP); Iterator ITL = L.iterator (); while (Itl.hasnext ()) {Integer ITV = Itl.next ();//system.out.println (ITV);}} }