import java.io.*;

public class SerializationExample {

    // 定義一個可序列化的類
    public static class MyCustomType implements Serializable {
        private String name;
        private int value;

        public MyCustomType(String name, int value) {
            this.name = name;
            this.value = value;
        }

        public String getName() {
            return name;
        }

        public int getValue() {
            return value;
        }

        @Override
        public String toString() {
            return "MyCustomType{" +
                    "name='" + name + '\'' +
                    ", value=" + value +
                    '}';
        }
    }

    public static void main(String[] args) {
        MyCustomType obj = new MyCustomType("Example", 123);

        // 序列化
        try (FileOutputStream fileOut = new FileOutputStream("my_object.ser");
             ObjectOutputStream out = new ObjectOutputStream(fileOut)) {
            out.writeObject(obj);
            System.out.println("Serialized data is saved in my_object.ser");
        } catch (IOException i) {
            i.printStackTrace();
        }

        // 反序列化
        try (FileInputStream fileIn = new FileInputStream("my_object.ser");
             ObjectInputStream in = new ObjectInputStream(fileIn)) {
            MyCustomType deserializedObj = (MyCustomType) in.readObject();
            System.out.println("Deserialized data: " + deserializedObj);
        } catch (IOException i) {
            i.printStackTrace();
        } catch (ClassNotFoundException c) {
            System.out.println("MyCustomType class not found");
            c.printStackTrace();
        }
    }
}

import java.sql.*;
import java.io.*;

public class DatabaseSerializationExample {

    // 假設(shè)你已經(jīng)有了數(shù)據(jù)庫連接
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase"; // 替換為你的數(shù)據(jù)庫URL
        String user = "myuser"; // 替換為你的數(shù)據(jù)庫用戶名
        String password = "mypassword"; // 替換為你的數(shù)據(jù)庫密碼

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            // 準(zhǔn)備要存儲的對象
            SerializationExample.MyCustomType obj = new SerializationExample.MyCustomType("Database Example", 456);

            // 序列化對象
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ObjectOutputStream oos = new ObjectOutputStream(bos);
            oos.writeObject(obj);
            byte[] serializedData = bos.toByteArray();
            oos.close();
            bos.close();

            // 準(zhǔn)備 SQL 語句
            String sql = "INSERT INTO report (name, parameter) VALUES (?, ?)"; // 假設(shè)表名為 report，列名為 name 和 parameter
            PreparedStatement pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, "ReportName");
            pstmt.setBytes(2, serializedData); // 將序列化后的字節(jié)數(shù)組存入 BLOB 列

            // 執(zhí)行 SQL 語句
            int rowsAffected = pstmt.executeUpdate();
            System.out.println(rowsAffected + " rows inserted.");

            pstmt.close();

        } catch (SQLException | IOException e) {
            e.printStackTrace();
        }
    }
}

import java.sql.*;
import java.io.*;

public class DatabaseDeserializationExample {

    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase"; // 替換為你的數(shù)據(jù)庫URL
        String user = "myuser"; // 替換為你的數(shù)據(jù)庫用戶名
        String password = "mypassword"; // 替換為你的數(shù)據(jù)庫密碼

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            // 準(zhǔn)備 SQL 語句
            String sql = "SELECT parameter FROM report WHERE name = ?"; // 假設(shè)表名為 report，列名為 name 和 parameter
            PreparedStatement pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, "ReportName");

            // 執(zhí)行 SQL 語句
            ResultSet rs = pstmt.executeQuery();

            // 遍歷結(jié)果集
            while (rs.next()) {
                // 獲取 BLOB 數(shù)據(jù)
                byte[] serializedData = rs.getBytes("parameter");

                // 反序列化對象
                ByteArrayInputStream bis = new ByteArrayInputStream(serializedData);
                ObjectInputStream ois = new ObjectInputStream(bis);
                SerializationExample.MyCustomType deserializedObj = (SerializationExample.MyCustomType) ois.readObject();
                ois.close();
                bis.close();

                // 打印反序列化后的對象
                System.out.println("Deserialized object: " + deserializedObj);
            }

            rs.close();
            pstmt.close();

        } catch (SQLException | IOException | ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}