// 爬下静态网页
	public String getOneHtml(String htmlurl) throws IOException {
		URL url;
		String temp;
		StringBuffer sb = new StringBuffer();
		try {
			url = new URL(htmlurl);
			BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream(), "utf-8"));// 读取网页全部内容
			while ((temp = in.readLine()) != null) {
				sb.append(temp);
			}
			in.close();
		} catch (MalformedURLException me) {
			System.out.println("你输入的URL格式有问题！请仔细输入");
			me.getMessage();
			throw me;
		} catch (IOException e) {
			e.printStackTrace();
			throw e;
		}

		// System.out.println(sb.toString()); //成功爬下了静态网页
		return sb.toString();
	}

// 通过通配符匹配
	public String getInfo(String s) {
		String regex;
		String res = "";

		// 通配符
		regex = "This is bill";
		Pattern pa = Pattern.compile(regex, Pattern.CANON_EQ);
		Matcher ma = pa.matcher(s);

		if (ma.find()) {
			// 成功找到

			regex = "http://cdn.qupeiyin.cn/.*?/.*?.mp4";
			pa = Pattern.compile(regex, Pattern.CANON_EQ);
			ma = pa.matcher(s);

			if (ma.find())
				res += (ma.group());
			
			return res;
		}

		else
			return null;

	}

///模拟售票的程序，三个线程共享一个ticket
package robot;

public class Bill implements Runnable {

	public Bill() {

	}

	public Bill(String name) {
		this.name = name;
	}

	private int ticket = 10;

	@Override
	public void run() {
		for (int i = 0; i < 5; i++) {
			if (ticket > 0) {
				System.out.println(Thread.currentThread().getName() + "--" + this.ticket--);
			}
		}
	}

	public static void main(String[] args) {
		Bill B3 = new Bill();
		new Thread(B3, "线程1").start();
		new Thread(B3, "线程2").start();
		new Thread(B3, "线程3").start();
	}

	private String name;

}

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.RandomAccessFile;

public class AppendFile {
	
	public static void method1(String file, String conent) {   
        BufferedWriter out = null;   
        try {   
            out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true)));   
            out.write(conent);   
        } catch (Exception e) {   
            e.printStackTrace();   
        } finally {   
            try {   
            	if(out != null){
            		out.close();   
                }
            } catch (IOException e) {   
                e.printStackTrace();   
            }   
        }   
    }   
  
    /**  
     * 追加文件：使用FileWriter  
     *   
     * @param fileName  
     * @param content  
     */  
    public static void method2(String fileName, String content) { 
    	FileWriter writer = null;
        try {   
            // 打开一个写文件器，构造函数中的第二个参数true表示以追加形式写文件   
            writer = new FileWriter(fileName, true);   
            writer.write(content);     
        } catch (IOException e) {   
            e.printStackTrace();   
        } finally {   
            try {   
            	if(writer != null){
            		writer.close();   
            	}
            } catch (IOException e) {   
                e.printStackTrace();   
            }   
        } 
    }   
  
    /**  
     * 追加文件：使用RandomAccessFile  
     *   
     * @param fileName 文件名  
     * @param content 追加的内容  
     */  
    public static void method3(String fileName, String content) { 
    	RandomAccessFile randomFile = null;
        try {   
            // 打开一个随机访问文件流，按读写方式   
            randomFile = new RandomAccessFile(fileName, "rw");   
            // 文件长度，字节数   
            long fileLength = randomFile.length();   
            // 将写文件指针移到文件尾。   
            randomFile.seek(fileLength);   
            randomFile.writeBytes(content);    
        } catch (IOException e) {   
            e.printStackTrace();   
        } finally{
        	if(randomFile != null){
        		try {
					randomFile.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
        	}
        }
    }  

	public static void main(String[] args) {
		try{
			File file = new File("d://text.txt");
			if(file.createNewFile()){
				System.out.println("Create file successed");
			}
			method1("d://text.txt", "123");
			method2("d://text.txt", "123");
			method3("d://text.txt", "123");
		}catch(Exception e){
			System.out.println(e);
		}
	}
}