Java 按关键字删除文件中的行

Java 按关键字删除文件中的行

直接上代码。

package test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class DeleteLineFromBigFile {
    public static void main(String[] args) {
        File inFile = new File("Y:\\YQY\\S2S\\workspace\\test\\src\\test\\input.sql");
        File outFile = new File("Y:\\YQY\\S2S\\workspace\\test\\src\\test\\output.sql");

        BufferedReader br = null;
        String readedLine;
        BufferedWriter bw = null;
        try {
            FileWriter fw = new FileWriter(outFile);
            bw = new BufferedWriter(fw);
            if (!outFile.exists()) {
                outFile.createNewFile();
            }
            br = new BufferedReader(new FileReader(inFile));
            int idx = 0;
            while ((readedLine = br.readLine()) != null) {
                if (readedLine.contains("2016-")) {
                    continue;
                }
                bw.write(readedLine + "\n");
                if (idx++ == 100) {
                    bw.flush();
                    idx = 0;
                }
            }
            bw.flush();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (br != null) {
                    br.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                if (bw != null) {
                    bw.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

搜索642M（压缩后15M）的文件，用了5秒左右，可以接受。