Java 웹사이트 액세스 속도를 최적화하는 방법은 무엇입니까? 여러 솔루션에 대한 자세한 설명

import com.google.common.cache.Cache; import com.google.common.cache.CacheBuilder; public class CacheExample { private static Cache cache = CacheBuilder.newBuilder() .maximumSize(1000) // 设置缓存的最大容量 .build(); public static void main(String[] args) { String key = "data_key"; Object data = getDataFromCache(key); if (data == null) { data = getDataFromDB(key); putDataIntoCache(key, data); } System.out.println(data); } private static Object getDataFromCache(String key) { return cache.getIfPresent(key); } private static Object getDataFromDB(String key) { // 从数据库获取数据的逻辑 return null; } private static void putDataIntoCache(String key, Object data) { cache.put(key, data); } }

import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class MultiThreadExample { private static final int THREAD_POOL_SIZE = 10; private static ExecutorService executorService = Executors.newFixedThreadPool(THREAD_POOL_SIZE); public static void main(String[] args) { for (int i = 0; i < 100; i++) { final int request = i; executorService.submit(() -> processRequest(request)); } executorService.shutdown(); } private static void processRequest(int request) { // 处理请求的逻辑 System.out.println("Processing request: " + request); } }

import java.util.concurrent.CompletableFuture; import java.util.concurrent.TimeUnit; public class AsyncExample { public static void main(String[] args) { CompletableFuture.supplyAsync(() -> fetchData()) .thenApply(data -> process(data)) .thenAccept(result -> System.out.println("Processing result: " + result)); // 阻塞主线程，等待异步处理完成 try { TimeUnit.SECONDS.sleep(3); } catch (InterruptedException e) { e.printStackTrace(); } } private static String fetchData() { // 获取数据的逻辑 return "data"; } private static String process(String data) { // 处理数据的逻辑 return "result"; } }

import com.zaxxer.hikari.HikariConfig; import com.zaxxer.hikari.HikariDataSource; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class ConnectionPoolExample { private static HikariDataSource dataSource; static { HikariConfig config = new HikariConfig(); config.setJdbcUrl("jdbc:mysql://localhost:3306/test"); config.setUsername("root"); config.setPassword("password"); dataSource = new HikariDataSource(config); } public static void main(String[] args) { try (Connection connection = dataSource.getConnection(); Statement statement = connection.createStatement(); ResultSet resultSet = statement.executeQuery("SELECT * FROM user")) { while (resultSet.next()) { System.out.println(resultSet.getString("name")); } } catch (SQLException e) { e.printStackTrace(); } } }