Re: [問題] 用java處理巨大文件

[penguin0322 (陸哥1/17記得共同101考本)]

麻煩了

import java.io.*;
import javax.swing.*;

public class textChange {

        /**
         * @param args
         */
        public static void main(String[] args) throws Exception {
                // TODO Auto-generated method stub
                String input="";
                String output="";
                String line="";
                String inputFile, outputFile;
                BufferedReader fileName = new BufferedReader(
                new InputStreamReader(System.in));

                //輸入檔名等...

                inputFile = JOptionPane.showInputDialog("Enter the FileName");

                FileReader inputFileReader =
                        new FileReader(inputFile);
                BufferedReader fileTextReader =
                        new BufferedReader(inputFileReader);

                String lineSep="";
                lineSep = System.getProperty("line.separator");

                FileWriter outputFileWriter =
                        new FileWriter("test.txt");
                BufferedWriter fileTextWriter =
                        new BufferedWriter(outputFileWriter);


                int count=0, outCount=0;

                //開始對文檔轉換及做儲存動作

                while ((line = fileTextReader.readLine()) != null)       {
                        if (line.matches("^>{1}.+$")) {
                                count+=1;
                                outCount+=1;

                                line = line.replace(">", "");
                                line = line.replace(" /", "\t");

                                if (outCount == 2) {
                                        if (output.matches("[ATCG]{100,}")) {
                                                fileTextWriter.write(output);
                                                outCount = 1;
                                                input="";
                                        }
                                }
                                else
                                        ;

                                if (count == 2) {
                                        input+=lineSep;
                                        input+=line;
                                        input+=lineSep;

                                        count = 1;
                                }
                                else {
                                        input+=line;
                                        input+=lineSep;
                                }
                        }
                        else {
                                input+=line;
                        }

                        output = input;
                        }
                if (line == null)
                        fileTextWriter.write(output);

                fileTextWriter.flush();
                fileTextWriter.close();

        }

}

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救救我

而且後來索性用MySQL直接讀

他也說太大 冏rz

那一些影片轉換格式的為什麼都可以一次跑完一個好幾G的檔

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是說我要把這麼大的檔分割數個小的來處理嗎?

再次謝謝你們

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