import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
public class FromEndRF {
public static void read(String filename) {
read(filename, "GBK");
}
public static void read(String filename, String charset) {
RandomAccessFile rf = null;
try {
rf = new RandomAccessFile(filename, "r");
long len = rf.length();
long start = rf.getFilePointer();
long nextend = start + len - 1;
String line;
rf.seek(nextend);
int c = -1;
while (nextend > start) {
c = rf.read();
if (c == '\n' || c == '\r') {
line = rf.readLine();
if (line != null) {
System.out.println(new String(line.getBytes("ISO-8859-1"), charset));
}else {
System.out.println(line);// 輸出為null，可以注釋掉
}
nextend--;
}
nextend--;
rf.seek(nextend);
if (nextend == 0) {// 當文件指針退至文件開始處，輸出第一行
System.out.println(new String(rf.readLine().getBytes("ISO-8859-1"), charset));
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (rf != null)
rf.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void main(String args[]) {
read("d:\\2.txt", "gbk");
}
}
posted on 2011-12-27 11:44
飛翔天使 閱讀(1775)
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