【个人作业】单词链

import java.util.ArrayList;
import java.util.List;

public class Chain {
    
    private static int chaincount = 0;
    private static char startal;
    private static char cuendal;
    private static List<ChainBean> chainlist = new ArrayList<ChainBean>();
    private static FileIOStream fileios = new FileIOStream();
    private static List<String> strlist =null;
    
    public static void main(String [] args)
    {
        /*
         * 读取文件到strlist
         * 遍历strlist，以非单词字符为间隔，存储到string变量word里,word首字母startal
         * 遍历ChainList,若有endal=startal，则添加到其wordlist。若无，则add一个ChainList
         * 找出最长的ChainList,储存到文件
         */
        
        
        if(fileios.readFile())
        {
            strlist = fileios.getStrlist();
            System.out.println("file read end");
            for(int i = 0 ; i < strlist.size() ; i++) {
                String s = strlist.get(i);
                extractWord(s);
            }
            selectLongChain();
        }
        
    }
    
    private static  void extractWord(String s)
    {
        System.out.println("extract word start");
        int t = 0;
        String word = "";
        for(int j=0; j<s.length(); j++)
        {
            char c = s.charAt(j);
            boolean al = (((c>=65)&&(c<=90))||((c>=97)&&(c<=122)));
            System.out.println("c = "+c+" , al = "+al);
            if((t==0)&&al)
            {
                startal = c;
                System.out.println("the new word startal = "+startal);
                t = 1;
            }
            if((t==1)&&al)
            {
                cuendal = c;
                word += c;
            }
            if((t==1)&&!al)
            {
                System.out.println("extract word : "+word);
                judgeStartAl(word);
            }
        }
        System.out.println("extract word :"+word);
        judgeStartAl(word);
        System.out.println("extract word end");
    }
    
    private static void judgeStartAl(String word)
    {
        System.out.println("judge startal start");
        int t=0;
        for(int i=0;(chaincount != 0)&&( i < chainlist.size())&&(t==0);i++)
        {
            System.out.println("current endal = "+chainlist.get(i).getEndal()+" , and the statral = "+startal);
            if((chainlist.get(i).getEndal() == startal)||chainlist.get(i).getEndal() == (startal + 32))
            {
                System.out.println("insert word "+word);
                chainlist.get(i).addWordlist(word);
                chainlist.get(i).setEndal(cuendal);
                t = 1;
            }
        }
        if(t==0)
        {
            System.out.println("add word "+word+" in a new chain");
            System.out.println("word = "+word);
            List<String> wordlist = new ArrayList<String>();
            wordlist.add(word);
            ChainBean chainbean = new ChainBean(wordlist,cuendal);
            System.out.println("the new chain endal = "+cuendal);
            chainlist.add(chainbean);
            chaincount++;
        }
    }
    
    private static void selectLongChain()
    {
        int max = 0;
        int t = 0;
        for(int i=0; i<chainlist.size();i++)
        {
            int length = chainlist.get(i).getWordlist().size();
            if(max < length)
            {
                max = length;
                t = i;
            }
        }
        if(chaincount != 0)
        {
            fileios.writeFile(chainlist.get(t).getWordlist());
        }
        else
        {
            System.out.println("the file is null");
        }
    }

}

import java.util.List;

public class ChainBean {
    
    private List<String> wordlist;
    private char endal;
    
    public ChainBean(List<String> wordlist,char endal)
    {
        this.wordlist = wordlist;
        this.endal = endal;
    }
    
    public List<String> getWordlist() {
        return wordlist;
    }
    public void addWordlist(String word) {
        wordlist.add(word);
    }
    public char getEndal() {
        return endal;
    }
    public void setEndal(char endal) {
        this.endal = endal;
    }
    
    
    

}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class FileIOStream {

    String filename = "E:\Homework\大二下\软工\input1.txt";
    String filename2 = "E:\Homework\大二下\软工\output1.txt";
    List<String> strlist = new ArrayList<String>();
    
    public void setStrlist(List<String> strlist)
    {
        this.strlist = strlist;
    }
    
    public List<String> getStrlist()
    {
        return strlist;
    }
    
    public boolean readFile()
    {
        boolean fileexists = true;;
        File file = new File(filename);
        if(!file.exists())
        {
            System.out.println("文件不存在");
            fileexists = false;
            return fileexists;
        }
        String s = null;
        BufferedReader br = null;
        try
        {
            br = new BufferedReader(new FileReader(filename));
            while((s = br.readLine()) != null) {  
                strlist.add(s);
            }
            System.out.println("文件读取成功");
        }catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally
        {
            try
            {
                br.close();
            }catch(Exception e)
            {
                e.printStackTrace();
            }
        }
        return fileexists;
    }
    
    public void writeFile(List<String> wordlist)
    {
        File file = new File(filename2);
        try {
            file.createNewFile();
            try (FileWriter writer = new FileWriter(file);
                     BufferedWriter out = new BufferedWriter(writer)
                ) {
                    for(int j = 0 ; j < wordlist.size() ; j++)
                    {
                        String s = wordlist.get(j);
                        out.write(s+"
");
                    }
                    out.flush(); // 把缓存区内容压入文件
                    System.out.println("文件写入成功");
                }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
}