外部文件读取

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class InvalidList {

private static final String FILE_NAME = "invalidlist.txt";

private static List<String> urls = new ArrayList<String>();

static {
File file = new File(System.getProperty("user.dir") + "/" + FILE_NAME);
if (file.exists()) {
BufferedReader br = null;
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
String line = null;
while ((line = br.readLine()) != null) {
urls.add(line);
}

} catch (Exception e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}

public static List<String> elements() {
return urls;
}

}