其中有几个数据集是.ttl 的，这个又是什么表示形式的啊？ 不懂耶

烦请高手指点哈？谢谢！

很久以前写的一个小程序从大文件中提取出前n行:

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class RDFSampler {

/**
  * @param args
  */
public static void main(String[] args) throws Exception {
  String source = "D://wordnet.rdf";
  String target = "D://wordnet_sample.rdf";
  RDFSampler sampler = new RDFSampler(source, target, 1000);
  sampler.init();
  sampler.run();
  sampler.close();
}

private int lineCount = 10000;

private String sourceFile;
private String targetFile;
private BufferedReader br;
private PrintWriter pw;

public RDFSampler(String sourceFile, String targetFile) {
  this.sourceFile = sourceFile;
  this.targetFile = targetFile;
}

public RDFSampler(String sourceFile, String targetFile, int count) {
  this.sourceFile = sourceFile;
  this.targetFile = targetFile;
  this.lineCount = count;
}

public void init() throws Exception {
  br = new BufferedReader(new InputStreamReader(new FileInputStream(sourceFile)));
  pw = new PrintWriter(new FileWriter(targetFile));
}

public String readLine() throws Exception {
  return br.readLine();
}

public void writeLine(String line) {
  pw.println(line);
}

public void run() throws Exception {
  int count = 0;
  for (String line = br.readLine(); line != null && count < lineCount; line = br.readLine()) {
   count++;
   pw.println(line);
   System.out.println(line);
  }
}

public void close() throws Exception {
  br.close();
  pw.close();
}

}

谢谢“beyondlei” 哈，我试试你的方法哦！