一、實驗目的

1．理解不同體系結構風格的具體內涵。

2．學習體系結構風格的具體實踐。

二、實驗環境

硬件： （依據具體情況填寫）

軟件：Java或任何一種自己熟悉的語言

三、實驗內容

“上下文關鍵字”KWIC(Key Word in Context，文本中的關鍵字）檢索系統接受有序的行集合：每一行是單詞的有序集合；每一個單詞又是字母的有序集合。通過重復地刪除航中第一個單詞，並把它插入行尾，每一行可以被“循環地移動”。KWIC檢索系統以字母表的順序輸出一個所有行循環移動的列表。

嘗試用不同的策略實現這個系統。選擇2-3種體系結構風格來實現。

四、實驗步驟：

import java.io.DataInputStream;
 
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;

public class KWIC {
    private static ArrayList<String> CircularShift(ArrayList<String> lines) {
        ArrayList
 
<String> tmp_lines = new ArrayList<String>();
        for (String i : lines) {
            CircularShiftLine(i, tmp_lines);
        }
        return tmp_lines;
    }

    private static void CircularShiftLine(String curLine,
            ArrayList<String> tmp_lines) {
        String[] words 
 
= curLine.split(" +|\t+");
        for (int i = 0; i < words.length; i++) {
            if (noiseWords.indexOf((words[i] + " ").toLowerCase()) != -1)
                continue;
            String shift = "";
            for (int j = i; j < (words.length + i); j++) {
                shift += words[j % words.length];
                if (j < (words.length + i - 1))
                    shift += " ";
            }
            tmp_lines.add(shift);
        }
        return;
    }

    private static ArrayList<String> Alphabetizer(ArrayList<String> lines) {
        ArrayList<String> tmp_lines = new ArrayList<String>();
        for (String i : lines) {
            i = convertString(i);
            tmp_lines.add(i);
        }
        Collections.sort(tmp_lines);
        lines.clear();
        for (String i : tmp_lines) {
            i = convertString(i);
            lines.add(i);
        }
        return lines;
    }

    static String convertString(String str) {
        String upStr = str.toUpperCase();
        String lowStr = str.toLowerCase();
        StringBuffer buf = new StringBuffer(str.length());
        for (int i = 0; i < str.length(); i++) {
            if (str.charAt(i) == upStr.charAt(i)) {
                buf.append(lowStr.charAt(i));
            } else {
                buf.append(upStr.charAt(i));
            }
        }
        return buf.toString();
    }

    private static ArrayList<String> input(String string) throws IOException {
        DataInputStream in = new DataInputStream(new FileInputStream(string));
        ArrayList<String> lines = new ArrayList<String>();
        String curLine = in.readLine();
        while (curLine != null) {
            lines.add(curLine);
            curLine = in.readLine();
        }
        in.close();
        return lines;
    }

    static void output(ArrayList<String> lines, String output)
            throws FileNotFoundException {
        PrintWriter fileWriter = new PrintWriter(output);
        for (String i : lines)
            fileWriter.println(i);
        fileWriter.close();
    }

    static void output(ArrayList<String> lines) {
        for (String i : lines)
            System.out.println(i);
    }
}

（2）隱式調用

import java.io.CharArrayWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;

public class Alphabetizer extends Filter {
    public Alphabetizer(Pipe input, Pipe output) {
        super(input, output);
        middleChange();
    }

    protected void middleChange() {
        ArrayList<String> lines = new ArrayList<String>();
        CharArrayWriter writer = new CharArrayWriter();
        try {
            int c = -1;
            while ((c = input.read()) != -1) {
                writer.write(c);
                if (c == 10) {
                    String curLine = writer.toString();
                    lines.add(curLine);
                    writer.reset();
                }
            }
            alpha(lines);
            for (String s : lines) {
                output.write(s);
            }
            input.closeReader();
            output.closeWriter();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static ArrayList<String> alpha(ArrayList<String> lines) {
        ArrayList<String> tmp_lines = new ArrayList<String>();
        for (String i : lines) {
            i = convertString(i);
            tmp_lines.add(i);
        }
        Collections.sort(tmp_lines);
        lines.clear();
        for (String i : tmp_lines) {
            i = convertString(i);
            lines.add(i);
        }
        return lines;
    }

    static String convertString(String str) {
        String upStr = str.toUpperCase();
        String lowStr = str.toLowerCase();
        StringBuffer buf = new StringBuffer(str.length());
        for (int i = 0; i < str.length(); i++) {
            if (str.charAt(i) == upStr.charAt(i)) {
                buf.append(lowStr.charAt(i));
            } else {
                buf.append(upStr.charAt(i));
            }
        }
        return buf.toString();
    }
}

結果圖

130242014074 林澤民 第3次實驗