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Upgrade to Java NIO

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Đạt Nhân Trương
2022-07-30 16:10:46 +07:00
parent d42a57ef79
commit a44744c05b
35 changed files with 553 additions and 500 deletions
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34
src/main/java/tools/mapletools/IdRetriever.java
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@@ -2,10 +2,14 @@ package tools.mapletools;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.time.Duration;
import java.time.Instant;
import java.util.ArrayList;
/**
@@ -26,8 +30,8 @@ import java.util.ArrayList;
*/
public class IdRetriever {
private static final boolean INSTALL_SQLTABLE = true;
private static final File INPUT_FILE = ToolConstants.getInputFile("fetch_ids.txt");
private static final File OUTPUT_FILE = ToolConstants.getOutputFile("fetched_ids.txt");
private static final Path INPUT_FILE = ToolConstants.getInputFile("fetch_ids.txt");
private static final Path OUTPUT_FILE = ToolConstants.getOutputFile("fetched_ids.txt");
private static final Connection con = SimpleDatabaseConnection.getConnection();
private static InputStreamReader fileReader = null;
@@ -132,15 +136,11 @@ public class IdRetriever {
}
private static void fetchDataOnMapleHandbook() throws SQLException {
String line;
try {
fileReader = new InputStreamReader(new FileInputStream(INPUT_FILE), StandardCharsets.UTF_8);
bufferedReader = new BufferedReader(fileReader);
PrintWriter printWriter = new PrintWriter(OUTPUT_FILE, StandardCharsets.UTF_8);
while ((line = bufferedReader.readLine()) != null) {
try(BufferedReader br = Files.newBufferedReader(INPUT_FILE);
PrintWriter printWriter = new PrintWriter(Files.newOutputStream(OUTPUT_FILE));) {
bufferedReader = br;
String line;
while ((line = bufferedReader.readLine()) != null) {
if (line.isEmpty()) {
printWriter.println("");
continue;
@@ -164,17 +164,13 @@ public class IdRetriever {
printWriter.println(str);
}
printWriter.close();
bufferedReader.close();
fileReader.close();
} catch (IOException ex) {
} catch (IOException ex) {
System.out.println(ex.getMessage());
}
}
public static void main(String[] args) {
Instant instantStarted = Instant.now();
try {
if (INSTALL_SQLTABLE) {
parseMapleHandbook();
@@ -187,6 +183,10 @@ public class IdRetriever {
System.out.println("Error: invalid SQL syntax");
e.printStackTrace();
}
Instant instantStopped = Instant.now();
Duration durationBetween = Duration.between(instantStarted, instantStopped);
System.out.println("Get elapsed time in milliseconds: " + durationBetween.toMillis());
System.out.println("Get elapsed time in seconds: " + durationBetween.toSeconds());
}
}