効率的なデータベース検索のための Java テクノロジー ソリューションの議論と実践

import java.sql.*;

public class DatabaseSearch {
    public static void main(String[] args) {
        try {
            // 建立数据库连接
            Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/database", "username", "password");

            // 创建索引
            Statement statement = connection.createStatement();
            String createIndexSQL = "CREATE INDEX idx_name ON students (name)";
            statement.executeUpdate(createIndexSQL);

            // 执行搜索
            String searchSQL = "SELECT * FROM students WHERE name = 'Tom'";
            ResultSet resultSet = statement.executeQuery(searchSQL);

            // 处理搜索结果
            while (resultSet.next()) {
                String name = resultSet.getString("name");
                int age = resultSet.getInt("age");
                System.out.println("Name: " + name + ", Age: " + age);
            }

            // 关闭连接
            statement.close();
            connection.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;

public class DatabaseSearch {
    private static Cache cache;

    public static void main(String[] args) {
        // 初始化缓存
        CacheManager cacheManager = CacheManager.getInstance();
        cache = cacheManager.getCache("studentsCache");

        // 判断缓存中是否存在搜索结果
        String searchKey = "Tom";
        Element resultElement = cache.get(searchKey);

        if (resultElement != null) {
            // 缓存中存在结果
            System.out.println("Result from cache:");
            SearchResult result = (SearchResult) resultElement.getObjectValue();
            System.out.println("Name: " + result.getName() + ", Age: " + result.getAge());
        } else {
            // 缓存中不存在结果，执行数据库搜索
            SearchResult result = databaseSearch(searchKey);

            // 将搜索结果存入缓存
            cache.put(new Element(searchKey, result));

            System.out.println("Result from database:");
            System.out.println("Name: " + result.getName() + ", Age: " + result.getAge());
        }
    }

    // 模拟数据库搜索
    private static SearchResult databaseSearch(String searchKey) {
        // 执行数据库搜索操作
        return new SearchResult("Tom", 20);
    }
}

class SearchResult {
    private String name;
    private int age;

    public SearchResult(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class DatabaseSearch {
    public static void main(String[] args) {
        // 创建线程池
        ExecutorService executorService = Executors.newFixedThreadPool(5);

        // 提交搜索任务
        String searchKey = "Tom";
        Future<SearchResult> future = executorService.submit(() -> databaseSearch(searchKey));

        try {
            // 等待搜索结果
            SearchResult result = future.get();

            // 处理搜索结果
            System.out.println("Name: " + result.getName() + ", Age: " + result.getAge());
        } catch (Exception e) {
            e.printStackTrace();
        }

        // 关闭线程池
        executorService.shutdown();
    }

    // 模拟数据库搜索
    private static SearchResult databaseSearch(String searchKey) {
        // 执行数据库搜索操作
        return new SearchResult("Tom", 20);
    }
}

class SearchResult {
    private String name;
    private int age;

    public SearchResult(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}