Java 개발에서 지속성과 데이터베이스 스토리지를 최적화하는 방법

import java.io.*;

public class FilePersistence {
    public static void main(String[] args) {
        // 创建一个Person对象
        Person person = new Person("张三", 20);
        
        // 将Person对象序列化到磁盘上
        try {
            FileOutputStream fos = new FileOutputStream("person.ser");
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            oos.writeObject(person);
            oos.close();
            fos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        
        // 从磁盘上读取Person对象
        try {
            FileInputStream fis = new FileInputStream("person.ser");
            ObjectInputStream ois = new ObjectInputStream(fis);
            Person newPerson = (Person) ois.readObject();
            ois.close();
            fis.close();
            System.out.println("读取到的Person对象是：" + newPerson);
        } catch (IOException | ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

class Person implements Serializable {
    private String name;
    private int age;
    
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
    
    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + ''' +
                ", age=" + age +
                '}';
    }
}

import java.sql.*;

public class BatchInsert {
    public static void main(String[] args) {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "123456");
            
            conn.setAutoCommit(false); // 关闭自动提交
            
            Statement stmt = conn.createStatement();
            
            for (int i = 1; i <= 10000; i++) {
                String sql = "INSERT INTO user(name, age) VALUES('user" + i + "', " + i + ")";
                stmt.addBatch(sql); // 将SQL语句添加到批次中
            }
            
            int[] result = stmt.executeBatch(); // 执行批量插入操作
            conn.commit(); // 提交事务
            
            stmt.close();
            conn.close();
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }
    }
}

import java.sql.*;

public class IndexQuery {
    public static void main(String[] args) {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "123456");
            
            String sql = "SELECT * FROM user WHERE name = ?";
            PreparedStatement pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, "user1"); // 设置查询参数
            ResultSet rs = pstmt.executeQuery(); // 执行查询
            
            while (rs.next()) {
                int id = rs.getInt("id");
                String name = rs.getString("name");
                int age = rs.getInt("age");
                System.out.println("id: " + id + ", name: " + name + ", age: " + age);
            }
            
            rs.close();
            pstmt.close();
            conn.close();
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }
    }
}