Java初级黄金体验 其二

Java初级黄金体验 其二

引言：让我们看一下你的C盘有多少个文件和文件夹

初级 Java IO : 第一个纪念碑

小程序大致功能

让我们看一下E盘有多少个文件

上代码

最近太多的作业

代码可以无限改进，君子回头十年不晚，先写软工去

package com.lxy.io;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
/**
 * 创建目录
 * @author lxy
 *
 * E:\aa\ff
 */
public class IOt2 {
	//定义static属性
	static String check_fuc;
	static String op_name;
	//定义输入函数
	public static String shuru() {
		Scanner scanner = new Scanner(System.in);
		String key = scanner.nextLine();
		return key;
	}
	public static void main(String[] args) throws IOException {
		//基础输出
		System.out.println("*按Q/q进行一次操作||按其他键退出");
		String ss1 = shuru();
		while(ss1.equals("Q") || ss1.equals("q")) {
			//功能
			System.out.println(" -----------------------------------------");
			System.out.println("|创建新文件/文件夹--->1|删除文件/文件夹--->2|");
			System.out.println(" -----------------------------------------");
			System.out.println("|查找文件/文件夹----->3|打开文件/文件夹--->4|");
			System.out.println(" -----------------------------------------");
			check_fuc = shuru();
			switch(check_fuc) {
				case "1" :{
					System.out.println(" ---------------------------------");
					System.out.println("|创建新文件---->1|创建新文件夹---->2|");
					System.out.println(" ---------------------------------");
					String check_creat = shuru();
					switch(check_creat) {
						case "1": {
							System.out.println("*请输入所要创建的名称：");
							op_name = shuru();
							Fifo ff = new Fifo(op_name);
							ff.creatIt();
							break;
						}
						case "2" :{
							System.out.println("*请输入所要创建的名称：");
							op_name = shuru();
							Directory dr_tmp = new Directory(op_name);
							dr_tmp.creatIt();
							break;
						}
					}
					break;
				}
				case "2" :{
					System.out.println("*请输入所要删除的名称：");
					op_name = shuru();
					int tmp = checkName(op_name);
					if(tmp == 3) {
						System.out.println("文件不存在");
					}else if(tmp == 2) {
						Fifo ff_tmp = new Fifo(op_name);
						ff_tmp.deleteIt();
					}else {
						Directory dr_tmp = new Directory(op_name);
						dr_tmp.deleteIt();
					}
					break;
				}
				case "3" :{
					System.out.println("*请输入所要查找的名称：");
					op_name = shuru();
					File ff = new File(op_name);
					if(ff.exists()) {
						System.out.println(ff.getName()+"存在!");
						System.out.println("其位置在："+ff.getAbsolutePath());
					}
					break;
				}
				case "4" :{
					System.out.println("*请输入要打开的文件名称");
					op_name = shuru();
					int tmp = checkName(op_name);
					if(tmp == 3) {
						System.out.println("文件不存在");
					}else if(tmp == 2) {
						System.out.println(" ---------------------------------");
						System.out.println("|查看内容---->1|增添/修改内容---->2|");
						System.out.println(" ---------------------------------");
						String cont = shuru();
						switch(cont) {
							case "1" :{
								viewFifo(op_name);
								break;
							}
							case "2" :{
								System.out.println(" ----------------------------");
								System.out.println("|增添内容---->1|修改内容---->2|");
								System.out.println(" ----------------------------");
								String mdf = shuru();
								switch(mdf) {
									case "1" :{
										appendFifo(op_name);
										break;
									}
									case "2": {
										modifyFifo(op_name);
										break;
									}
								}
								break;
							}
						}

					}else {
						printDirBasicMsg(op_name);
					}
					break;
				}
			}
			//基础输出
			System.out.println("按Q/q进行一次操作||按其他键退出");
			ss1 = shuru();
		}
		System.out.println("你已退出！");
	}
	//封装文件夹查看功能函数
	public static void printDirBasicMsg(String s) {
		Directory Dr = new Directory(s);
		System.out.println("该文件夹基本信息如下：");
		System.out.println("*大小："+Dr.getDirLength()+"字节");
		System.out.println("*子文件夹数量："+Dr.getDirChilddirNum()+"个");
		System.out.println("*子文件数量："+Dr.getDirChildfileNum()+"个");
		System.out.println("*其子文件名称如下");
//		Dr.printContent(Dr.fd, 0);
	}
	//封装文件查看函数及其修改内容的功能
	public static void viewFifo(String s) throws FileNotFoundException {
		Fifo fo = new Fifo(s);
		fo.printContent();
	}
	//增加内容
	public static void appendFifo(String s){
		Fifo fo = new Fifo(s);
		fo.appendIt();
	}
	//修改内容
	public static void modifyFifo(String s){
		Fifo fo = new Fifo(s);
		fo.modifyIt();
	}
	//检查为文件夹/文件函数
	public static int checkName(String s) {
		int flag;
		File f_check = new File(s);
		if(f_check.isDirectory()) {
			flag = 1;
		} else if(f_check.isFile()) {
			flag = 2;
		}else {
			flag = 3;
		}
		return flag;
	}
}
//文件夹类
class Directory{
	//
	private String path;
	//文件夹长度
	private int dirLength;
	//所有子文件夹的数量
	private int dirChilddirNum;
	//所有子文件的数量
	private int dirChildfileNum;
	public File fd;
	//
	public Directory(String s) {
		this.path = s;
		this.fd = new File(path);
		this.dirLength = 0;
		this.dirChilddirNum = 0;
		this.dirChildfileNum = 0;
		this.openFuc(fd);
	}
	//文件夹的大小以及子文件/文件夹的数量
	private void openFuc(File fd) {
		if(fd != null && fd.exists()) {
			if(fd.isFile()) {
				this.dirChildfileNum++;
				dirLength += fd.length();
			}else if(fd.isDirectory()) {
				this.dirChilddirNum++;
				if(fd.listFiles() != null)
					for(File f1:fd.listFiles())
						openFuc(f1);
			}
		}
	}
	//列出所有子文件夹和子文件
	public void printContent(File f,int deep) {
		for(int i = 0; i < deep; ++i) {
			System.out.print("-");
		}
		System.out.println(f.getName());
		if(f == null||!f.exists()) {
			return ;
		}else if(f.isDirectory()) {
			if(f.listFiles() != null)
				for(File f1:f.listFiles()) {
					printContent(f1,deep+1);
				}
		}
	}
	//创建文件夹
	public void creatIt() {
		if(fd.mkdirs()) {
			System.out.println("*创建文件夹成功！");
		}else if(fd.exists()) {
			System.out.println("*文件夹已存在请勿重复创建！");
		}else {
			System.out.println("*创建失败！");
		}
	}
	//删除文件夹
	public void deleteIt() {
		if(fd.delete()) {
			System.out.println("*文件夹"+fd.getName()+"已删除！");
		}else {
			System.out.println("*删除失败！");
		}

	}
	public int getDirLength() {
		return dirLength;
	}

	public int getDirChilddirNum() {
		return dirChilddirNum;
	}

	public int getDirChildfileNum() {
		return dirChildfileNum;
	}
}
class Fifo{
	private String path;
	File fdd;
	FileReader fread;
	FileWriter fwriter;
	//构造器
	Fifo(String s){
		this.path = s;
		fdd = new File(path);
	}
	//查看文件内容
	public void printContent() throws FileNotFoundException {
		System.out.println("*文件已打开，内容如下");
		fread = new FileReader(fdd);
		char[] a = new char[100];
		try {
			fread.read(a);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		for(char tmp : a) {
			System.out.print(tmp);
		}
		try {
			fread.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("-------------------------");
	}
	//增添文件内容
	public void appendIt() {
		Scanner scanner_tmp = new Scanner(System.in);
		System.out.println("*请在下方输入你要添加的内容");
		String tmp = scanner_tmp.nextLine();
		try {
			fwriter = new FileWriter(this.fdd,true);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		try {
			fwriter.write(tmp);
			fwriter.flush();
			fwriter.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("*文件内容添加成功");
	}
	//修改文件内容
	public void modifyIt() {
		Scanner scanner_tmp = new Scanner(System.in);
		System.out.println("*请在下方输入你要修改的内容");
		String tmp = scanner_tmp.nextLine();
		try {
			fwriter = new FileWriter(this.fdd,false);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		try {
			fwriter.write(tmp);
			fwriter.flush();
			fwriter.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("*文件内容修改成功");
	}
	//创建文件
	public void creatIt() throws IOException {
		if(fdd.createNewFile()) {
			System.out.println("*创建新文件成功！");
		}else if(fdd.exists()){
			System.out.println("*文件"+fdd.getName()+"已存在！");

		}else {
			System.out.println("*创建新文件失败！");
		}
	}
	//删除文件
	public void deleteIt() {
		if(fdd.delete()) {
			System.out.println("*文件"+fdd.getName()+"已删除！");
		}else {
			System.out.println("*删除失败！");
		}
	}
}