java小作业(十七)

1.有1个字符串 div-source="http://www.baidu.com/qy/ph.mp3",要求将里面的url去出来然后输出在控制台上

package com.sj.homework;
/**
 * @desc	1.有1个字符串 div-source="http://www.baidu.com/qy/ph.mp3",要求将里面的url去出来然后输出在控制台上
 * @author 	ws
 * @time	8.14
 */
public class Test {
	public static void main(String[] args) {
		String str = "div-source='http://www.baidu.com/qy/\"ph.mp3'";//字符串str
		String regex = "\"|\'|(.*?)=";//正则表达式，双引号、单引号、等号和等号之前
		String str2 = str.replaceAll(regex, "");//匹配的全部替换为空
		System.out.println(str2);//输出控制台
	}
}

2.有一个名字叫123.txt的文本文件，里面存放了1一句话“我喜欢编程：123”，将这个文件复制一份并最终将复制后的结果(fz.txt)存放在D盘的cms文件夹下

package com.sj.homework;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;

public class Test3 {
	public static void main(String[] args) throws IOException {
		String path = "d:/123.txt";
		File file = new File(path);
		if (file.isFile() && file.exists()) {
			System.out.println("文件存在\n");
			FileInputStream inputStream = new FileInputStream(file);//将file转为流
			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "GBK");//将当前的流进行编码设置
			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);//将携带有数据的GBK格式的流，装入到缓冲区内
			
			String path2 = "d:/cms/fz.txt";//路径
			File file2 = new File(path2);
			//创建一个写入的流
			FileOutputStream fileOutputStream = new FileOutputStream(file2, false);//false执行一次，true执行两次
			//对流编码
			Writer fileWrite = new OutputStreamWriter(fileOutputStream, "GBK");
			//将已经设置好编码格式的输入流加入到缓冲区中
			BufferedWriter bufferedWriter = new BufferedWriter(fileWrite);
			//开始写入
			String everyLine = "";
			while ((everyLine = bufferedReader.readLine())!=null) {//将文件的数据循环逐行读取出来
				bufferedWriter.write(everyLine);
			}
			//关闭流对象
			bufferedWriter.close();
			fileWrite.close();
			fileOutputStream.close();
			bufferedReader.close();
			inputStreamReader.close();
			inputStream.close();
			
			System.out.println("复制成功");
		}
		
		
		
	}

}