apache commons 搜集总结

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.io.FileSystemUtils;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.filefilter.SuffixFileFilter;
import org.apache.commons.io.output.CountingOutputStream;
import org.apache.commons.io.output.TeeOutputStream;
import org.apache.commons.lang.ArrayUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.time.StopWatch;

 

//输入流复制到输出流
		Writer write = new FileWriter("c:\\person.txt");
		InputStream ins = new FileInputStream(new File("c:\\text.txt"));
		org.apache.commons.io.IOUtils.copy(ins, write);
		write.close();
		ins.close();//网络流保存为文件 
		URL url = new URL("http://www.163.com");
		File file = new File("c:\\163.html");
//文件目录操作 
		File dir = new File("c:\\test");
		FileUtils.cleanDirectory(dir);// 清空目录下的文件
//目录大小 
		long size = FileUtils.sizeOfDirectory(dir);//如果不存在,新建
	    // 如果存在,修改文件修改时间
	    FileUtils.touch(testFile);
//如果不存在,新建
	    // 如果存在,修改文件修改时间
	    FileUtils.touch(testFile); 		File testFile = new File( "testFile.txt" ); 		FileUtils.deleteDirectory(dir);//删除目录和目录下的文件 		FileUtils.copyURLToFile(url, file); 

//文本写入指定文件
		String name = "my name is kk";
		File file = new File("c:\\text.txt");
		FileUtils.writeStringToFile(file, name);

//将输入流转换成文本
		URL url = new URL("http://www.163.com");
		InputStream ins = url.openStream();
		String contents = org.apache.commons.io.IOUtils.toString(ins, "UTF-8");
		System.out.println("Slashdot: " + contents);

 

//关闭相关流 
		File file = null;

		InputStream ins = null;
		try {
			file = new File("C:\\Test.java");

			ins = new FileInputStream(file);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			org.apache.commons.io.IOUtils.closeQuietly(ins);
		}

 

//文件复制 
		File srcfile = new File("c:\\Test.java");
		File destfile = new File("c:\\Test.java.bak");
		FileUtils.copyFile(srcfile, destfile);

//察看剩余空间
		long freeSpace = FileSystemUtils.freeSpaceKb("c:/");
//记录流的读取写入字节数 
	  File test = new File( "test.txt" );
	  //输出流的统计
	  CountingOutputStream countStream = null;
	  //输入流的统计
	  //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 {
			org.apache.commons.io.IOUtils.closeQuietly(countStream);
		}
		
		if (countStream != null) {
			int bytesWritten = countStream.getCount();
			System.out.println("Wrote " + bytesWritten + " bytes to test.txt");
//相同的内容写入不同的文本 
		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 {
		    org.apache.commons.io.IOUtils.closeQuietly( outStream );
//得到某个目录下所有以.txt结尾的文件
		File rootDir = new File("F:/jianpuzhai/resource");  
		FilenameFilter fileFilter = new SuffixFileFilter(".txt");  
		String[] txtFiles = rootDir.list( fileFilter );  
		System.out.println( ArrayUtils.toString( txtFiles ) );   		} 		} 		
System.out.println("剩余多少:"+freeSpace/(1024*1024)+"G");

 

 

评论

1 楼 fengniao 2010-04-13  

敢问楼主，这个是做什么用的呢