hadoop2.2编程: SequenceFileWritDemo

 import java.io.IOException;
 import java.net.URI;

 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.io.SequenceFile;
 import org.apache.hadoop.io.IntWritable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.io.IOUtils;

 public class SequenceFileWritDemo {
 private static final String[] DATA = {
 "one, two, buckle my shoe",
 "Three, four, shut the door"
 };

 public static void main(String[] args) throws IOException {
 String uri = args[0];
 Configuration conf = new Configuration();
 FileSystem fs = FileSystem.get(URI.create(uri), conf);
 Path path = new Path(uri);

 IntWritable key = new IntWritable();
 Text value = new Text();
 SequenceFile.Writer writer = null;
 try {
 writer = SequenceFile.createWriter(conf, writer.file(path), writer.keyClass(key.getClass()), writer.valueClass(value.getClass()));

 for( int i = 0; i < 100; i++ ) {
 key.set(100 - i);

 value.set(DATA[i % DATA.length]);

 System.out.printf("[%s]\t%s\t%s\n", writer.getLength(), key, value);
 writer.append(key, value);
 }
 } finally {
 IOUtils.closeStream(writer);
 }
 }
 }