java实现小说阅读器（功能：查看全文、统计总行数/总页码数、查找指定行、指定页码、实现翻页）

绝地灬酷狼 2022-04-06 17:56 907阅读 0赞

#### 1.任务要求： ####

在DOS窗口下，实现查看全文、统计总行数/总页码数、查找指定行、指定页码、翻页

#### 2.阅读器实现方式 ####

![在这里插入图片描述][20181209234849629.png]

### 输入1(查看全文、统计总行数/总页码数、) ###

![在这里插入图片描述][20181216234125663.gif]

### 输入2（读取指定行，查找其上下行） ###

**输入+显示下一行，输入-显示上一行，输入bye返回上一级**  
![在这里插入图片描述][20181216234703156.gif]

### 输入3（查找指定页码，实现翻页功能） ###

**输入+显示下一页，输入-显示上一页，输入bye返回上一级**  
![在这里插入图片描述][20181216234753332.gif]

#### 3.具体代码如下 ####

**主要分为三个子程序，然后在主程序中分别进行调用，以此来实现小说阅读器的各功能。**

import java.io.*;
    import java.util.Scanner;
    class Display_txt 
    { 
    	//查看全文（以每10个段落为一页，统计总行数）
    	static void ReadAll (String fileName) throws IOException
    	{ 
    		BufferedReader br = new BufferedReader(new InputStreamReader (new FileInputStream (fileName)));//使用缓冲区的方法将数据读入到缓冲区中
    		String str;
    		int i=1;
    		int a=0,b=1;
    		while((str = br.readLine()) != null)
    		{ 
    			System.out.println( "["+i+"]:" + str);
    			System.out.println( );
    			if(i==a+10)   //分页(以每10个段落为一页)
    			{ 
    				System.out.println("------------------------ page "+b+" ------------------------");
    				a=a+10;
    				b=b+1;
    			}
    			i=i+1;
    		}
    		System.out.println("------------------------ page "+b+" ------------------------\n");
    		i=i-1;
    		System.out.println("本文共有"+i +"行; 共有"+b+"页\n");
    	}
     
    	//查看指定页码，实现上下翻页
    	static void getPage (String fileName) throws IOException
    	{ 
    		System.out.println("(提示：输入00返回上一级)");
    		System.out.print("请输入查询页码：");
    		Scanner sc=new Scanner(System.in);
    		int pageNumber=sc.nextInt();	
    		while(pageNumber!=00)
    		{ 		
    			BufferedReader br = new BufferedReader(new InputStreamReader (new FileInputStream (fileName)));			
    			String line = br.readLine();		
    			int num=0;	
    			int startNumber=(pageNumber-1)*10+1;
    			int endNumber=pageNumber*10;
    			while(line!= null)
    			{ 		
    				if(startNumber==++num)  
    				{ 	
    					
    					System.out.println("["+startNumber+"]:"+line);
    					int i=startNumber;
    					while(i<endNumber)
    					{ 
    						i=i+1;
    						line=br.readLine();
    						System.out.println("["+i+"]:"+line);	
    					}
    					System.out.println("-------------------page "+ pageNumber+"--------------------");
    					System.out.println("(提示：输入+(下一页)；输入-(上一页);输入bye(返回上一级);");
    					System.out.print("请输入：");					
    					Scanner sc1=new Scanner(System.in);
    					String pageNumber1=sc1.next();
    					int pn=pageNumber;
    					while(!pageNumber1.equals("bye"))
    					{ 					
    						if(pageNumber1.equals("+"))
    						{ 	
    							BufferedReader br1 = new BufferedReader(new InputStreamReader (new FileInputStream (fileName)));
    							String line1=br1.readLine();
    							pn=pn+1;
    							int num1=0;
    							int startNumber1=(pn-1)*10+1,endNumber1=pn*10;
    							while(line1!= null)
    							{ 
    								if (startNumber1==++num1)
    								{ 
    									System.out.println("["+startNumber1+"]:"+line1);
    									int a=startNumber1;
    									while(a<endNumber1)
    									{ 
    										a=a+1;
    										line1=br1.readLine();
    										System.out.println("["+a+"]:"+line1);
    									}
    									System.out.println("-------------------page "+ pn+"--------------------");
    
    								}
    								line1=br1.readLine();
    							}
    						}
    						if(pageNumber1.equals("-"))
    						{ 	
    							BufferedReader br2 = new BufferedReader(new InputStreamReader (new FileInputStream (fileName)));
    							String line2=br2.readLine();
    							pn=pn-1;
    							int num2=0;
    							int startNumber2=(pn-1)*10+1,endNumber2=pn*10;
    							while(line2!= null)
    							{ 
    								if (startNumber2==++num2)
    								{ 
    									System.out.println("["+startNumber2+"]:"+line2);
    									int b=startNumber2;
    									while(b<endNumber2)
    									{ 
    										b=b+1;
    										line2=br2.readLine();
    										System.out.println("["+b+"]:"+line2);
    									}
    									System.out.println("-------------------page "+ pn+"--------------------");
    
    								}
    								line2=br2.readLine();
    							}
    						}
    						else
    						{ }
    						System.out.print("请输入：");
    						pageNumber1=sc1.next();	
    					}
    				}
    				line=br.readLine();	
    			}
    			System.out.println("(提示：输入00返回上一级)");
    			System.out.print("请输入查询页码：");
    			pageNumber=sc.nextInt();
    		}
    		System.out.println("返回到上一级");	
    	}
    		//读取指定行,并查看上下行
    	static void readxxLine (String fileName) throws IOException
    	{ 
    		System.out.println("(提示：输入00返回上一级)");
    		System.out.print("请输入查询行：");
    		Scanner sc=new Scanner(System.in);
    		int lineNumber=sc.nextInt();	
    		while(lineNumber!=00)
    		{ 		
    			BufferedReader br = new BufferedReader(new InputStreamReader (new FileInputStream (fileName)));//使用缓冲区的方法将数据读入到缓冲区中 
    			String line = br.readLine();		
    			int num=0;	
    			while(line!= null)
    			{ 	
    				if(lineNumber==++num)  
    				{ 	
    					System.out.println("["+lineNumber+"]:"+line);
    					System.out.println("提示：输入+(下一行)；输入-(上一行)；输入bye(返回上一级)");
    					System.out.print("请输入：");
    					Scanner sc1=new Scanner(System.in);
    					String lineNumber1=sc1.next();
    					int ln=lineNumber;
    					while(!lineNumber1.equals("bye"))
    					{ 					
    						if(lineNumber1.equals("+"))
    						{ 	
    							BufferedReader br1 = new BufferedReader(new InputStreamReader (new FileInputStream (fileName)));
    							String line1=br1.readLine();
    							ln=ln+1;
    							int num1=0;
    							while(line1!= null)
    							{ 
    								if (ln==++num1)
    								{ 
    									System.out.println("["+ln+"]:"+line1);
    								}
    								line1=br1.readLine();
    							}
    						}
    						if(lineNumber1.equals("-"))
    						{ 	
    							BufferedReader br2 = new BufferedReader(new InputStreamReader (new FileInputStream (fileName)));
    							String line2=br2.readLine();
    							ln=ln-1;
    							int num2=0;
    							while(line2!= null)
    							{ 
    								if (ln==++num2)
    								{ 
    									System.out.println("["+ln+"]:"+line2);
    								}
    								line2=br2.readLine();
    							}
    						}
    						else
    						{ }
    						lineNumber1=sc1.next();					
    					}
    				}
    				line=br.readLine();	
    			}
    			System.out.println("(提示：输入00返回上一级)");
    			System.out.print("请输入查询行：");
    			lineNumber=sc.nextInt();
    		}
    		System.out.println("返回上一级");	
    	}
    	//主程序
    	public static void main(String[] args) throws IOException
    	{ 
    		String fileName ="E:/java task/cookie reader/哲学家都干了些什么.txt";
    		System.out.println("提示：输入1(查看全文,统计全文总行数和总页码数)；输入2(读取指定行，并查看上下行)；输入3(查看指定页码的内容，上下翻页)；");
    		while(true)
    		{ 
    			
    			System.out.print("请输入：");
    			Scanner sc=new Scanner(System.in);
    			int j=sc.nextInt();			
    			if(j==1)
    			{ 	
    				ReadAll(fileName);
    				j=0;
    			}
    			if(j==2)
    			{ 	
    				readxxLine(fileName);
    				j=0;
    			}
    			if(j==3)
    			{ 	
    				getPage(fileName);
    				j=0;
    			}
    			if(j==0)
    			{ }
    			else
    			{ 	
    				System.out.println("输入错误");
    			}
    			System.out.println("提示：输入1(查看全文,统计全文总行数和总页码数)；输入2(读取指定行，并查看上下行)；输入3(查看指定页码的内容，上下翻页)；");
    		}
    	}
    }

[20181209234849629.png]: /images/20220406/37181b36ba8f4165821361dbd1573b54.png
[20181216234125663.gif]: /images/20220406/90a05c15af7640be875305a99514f6d3.png
[20181216234703156.gif]: /images/20220406/5eecf1223b7941e7af3d387f9efc515e.png
[20181216234753332.gif]: /images/20220406/1feca4792fc84805b4784f3cb23698c0.png