轉(zhuǎn)載自?使用org.apache.commons.io.FileUtils,IOUtils;工具類操作文件

File src = new File("G:/2012/portal/login.jsp"); File tar = new File("G:/2012/portal/loginZs.jsp"); File tarDir = new File("G:/2012/portal/center/"); FileUtils.copyFile(src,tar);//復(fù)制文件 FileUtils.copyFileToDirectory(src, tarDir);//復(fù)制文件到指定文件夾??

?

File src = new File("G:/2012/portal/login.jsp"); File tar = new File("G:/2012/portal/loginZs.jsp"); File tarDir = new File("G:/2012/portal/center/"); FileUtils.copyFile(src,tar);//復(fù)制文件 FileUtils.copyFileToDirectory(src, tarDir);//復(fù)制文件到指定文件夾

?

Commons IO是apache的一個開源的工具包,封裝了IO操作的相關(guān)類,使用Commons IO可以很方便的讀寫文件,

?

FileUtils 中提供了許多設(shè)計文件操作的 已封裝好的方法。

IOUtils 則是提供了讀寫文件的方法。

?

讀取文件：

// by FileUtils List<String> lines = FileUtils.readLines(file, "UTF-8"); // by IOUtils List<String> lines = IOUtils.readLines(new FileInputStream(file), "UTF-8");

寫入文件：

// by FileUtils FileUtils.writeLines(file, "UTF-8", lines); // by IOUtils IOUtils.writeLines(lines, null, new FileOutputStream(file)); public class IoTest { /** * @param args */ public static void main(String[] args) throws Exception { // 輸入流復(fù)制到 輸出流 Writer write = new FileWriter("c:\\kk.dat"); InputStream ins = new FileInputStream(new File("c:\\text.txt")); IOUtils.copy(ins, write); write.close(); ins.close(); //文本寫入指定文件 String name = "my name is panxiuyan"; File file = new File("c:\\name.txt"); FileUtils.writeStringToFile(file, name); //將輸入流轉(zhuǎn)換成文本 URL url = new URL("http://www.dimurmill.com"); InputStream ins = url.openStream(); String contents = IOUtils.toString(ins,"UTF-8"); System.out.println( "Slashdot: " + contents ); //關(guān)閉相關(guān)流 File file = null; InputStream ins = null; try{ file = new File("C:\\Test.java"); ins = new FileInputStream(file); }catch(Exception e){ e.printStackTrace(); }finally{ IOUtils.closeQuietly(ins); } } //文件復(fù)制 File srcfile = new File("c:\\Test.java"); File destfile = new File("c:\\Test.java.bak"); FileUtils.copyFile(srcfile, destfile); //文件復(fù)制指定的目錄 File srcfile = new File("c:\\Test.java"); File destDir = new File("D:\\"); FileUtils.copyFileToDirectory(srcfile, destDir); //網(wǎng)絡(luò)流保存為文件 URL url = new URL("http://www.163.com"); File file = new File("c:\\163.html"); FileUtils.copyURLToFile(url, file); //文件目錄操作 File dir = new File("c:\\test"); FileUtils.cleanDirectory(dir);//清空目錄下的文件 FileUtils.deleteDirectory(dir);//刪除目錄和目錄下的文件 //目錄大小 long size = FileUtils.sizeOfDirectory(dir); //目錄操作 File testFile = new File( "testFile.txt" ); //如果不存在,新建 // 如果存在,修改文件修改時間 FileUtils.touch( testFile ); //記錄流的讀取寫入字節(jié)數(shù) File test = new File( "test.dat" ); //輸出流的統(tǒng)計 CountingOutputStream countStream = null; //輸入流的統(tǒng)計 //CountingInputStream countStream = null; try { FileOutputStream fos = new FileOutputStream( test ); countStream = new CountingOutputStream( fos ); countStream.write( "Hello".getBytes( ) ); } catch( IOException ioe ) { System.out.println( "Error writing bytes to file." ); } finally { IOUtils.closeQuietly( countStream ); } if( countStream != null ) { int bytesWritten = countStream.getCount( ); System.out.println( "Wrote " + bytesWritten + " bytes to test.dat" ); } //相同的內(nèi)容寫入不同的文本 File test1 = new File("split1.txt"); File test2 = new File("split2.txt"); OutputStream outStream = null; try { FileOutputStream fos1 = new FileOutputStream( test1 ); FileOutputStream fos2 = new FileOutputStream( test2 ); //包含不同的文本 outStream = new TeeOutputStream( fos1, fos2 ); outStream.write( "One Two Three, Test".getBytes( ) ); outStream.flush( ); } catch( IOException ioe ) { System.out.println( "Error writing to split output stream" ); } finally { IOUtils.closeQuietly( outStream ); } } }

?

?

?

總結(jié)

以上是生活随笔為你收集整理的使用org.apache.commons.io.FileUtils,IOUtils工具类操作文件的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。