Commons-IO I (IOUtils, FileUtils)

http://commons.apache.org/io/api-release/index.html?org/apache/commons/io/FileUtils.html

간단한 사용예
import java.io.File; import java.io.IOException; import java.io.InputStream; import java.net.MalformedURLException; import java.net.URL; import org.apache.commons.io.FileUtils; import org.apache.commons.io.IOUtils; public class IOUtilsTest { /** * @ 자카르타 프로젝트 Commons IO Test */ public static void main(String[] args) { InputStream in = null; StringBuffer sb = new StringBuffer(); // 읽어들인 문자들을 저장할 공간. String fileName = "D:\\GalileoForHtml\\workspace\\ApacheCommons\\Common_IO\\CommonIOTest\\test1.txt"; // 읽어들인 문자를 기록할 파일. // 기존에 쓰던 방식 /* try { in = new URL("http://www.google.co.kr").openStream(); InputStreamReader inR = new InputStreamReader(in); BufferedReader buf = new BufferedReader(inR); String line; while ((line = buf.readLine()) != null) { System.out.println(line); } in.close(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } */ try { in = new URL("http://www.google.co.kr").openStream(); sb.append(IOUtils.toString(in) + "\n"); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { IOUtils.closeQuietly(in); } System.out.println(sb.toString()); File file = new File(fileName); try { FileUtils.writeStringToFile(file, sb.toString()); } catch (IOException e) { e.printStackTrace(); } } }

파일에 기록했으니 읽어오기도 한 번...

import java.io.File; import java.io.IOException; import org.apache.commons.io.FileUtils; public class FileUtilsTest { /** * @param args */ public static void main(String[] args) { StringBuffer sb = new StringBuffer(); // 읽어들인 문자들을 저장할 공간. String fileName = "D:\\GalileoForHtml\\workspace\\ApacheCommons\\Common_IO\\CommonIOTest\\test1.txt"; // 읽어들일 파일. File file = new File(fileName); try { sb.append(FileUtils.readFileToString(file)); System.out.println(sb.toString()); } catch (IOException e) { e.printStackTrace(); } } }