Clob到字符串的转换

import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class ClobToStringExample {
    public static void main(String[] args) {
        Connection connection = null;
        PreparedStatement preparedStatement = null;
        ResultSet resultSet = null;

        try {
            // 建立数据库连接
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/database", "username", "password");

            // 准备SQL语句
            String sql = "SELECT clob_column FROM table_name WHERE id = ?";
            preparedStatement = connection.prepareStatement(sql);
            preparedStatement.setInt(1, 1);

            // 执行查询
            resultSet = preparedStatement.executeQuery();

            // 处理结果集
            if (resultSet.next()) {
                Clob clob = resultSet.getClob("clob_column");
                String clobString = clobToString(clob);
                System.out.println(clobString);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            try {
                if (resultSet != null) {
                    resultSet.close();
                }
                if (preparedStatement != null) {
                    preparedStatement.close();
                }
                if (connection != null) {
                    connection.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

    private static String clobToString(Clob clob) {
        StringBuilder sb = new StringBuilder();
        try {
            Reader reader = clob.getCharacterStream();
            BufferedReader br = new BufferedReader(reader);
            String line;
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
            br.close();
        } catch (SQLException | IOException e) {
            e.printStackTrace();
        }
        return sb.toString();
    }
}