Java 获取数据库5分钟内新增数据 - 代码示例

以下是使用 Java 编写的获取数据库中某张表 5 分钟内新增数据的示例代码：

import java.sql.*;
import java.util.*;

public class GetNewDataInFiveMinutes {
    private static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    private static final String DB_URL = "jdbc:mysql://localhost:3306/your_database_name";
    private static final String USER = "your_username";
    private static final String PASS = "your_password";

    public static void main(String[] args) {
        Connection conn = null;
        PreparedStatement stmt = null;
        ResultSet rs = null;

        try {
            // Register JDBC driver
            Class.forName(JDBC_DRIVER);

            // Open a connection
            System.out.println("Connecting to database...");
            conn = DriverManager.getConnection(DB_URL, USER, PASS);

            // Prepare a statement to retrieve the new data
            String sql = "SELECT * FROM your_table_name WHERE created_at >= ?";
            stmt = conn.prepareStatement(sql);

            // Set the parameter for the time five minutes ago
            Calendar cal = Calendar.getInstance();
            cal.add(Calendar.MINUTE, -5);
            Timestamp fiveMinutesAgo = new Timestamp(cal.getTimeInMillis());
            stmt.setTimestamp(1, fiveMinutesAgo);

            // Execute the query
            rs = stmt.executeQuery();

            // Process the result set
            while(rs.next()) {
                // Retrieve the data from the result set
                int id = rs.getInt("id");
                String name = rs.getString("name");
                Timestamp createdAt = rs.getTimestamp("created_at");

                // Print out the data
                System.out.println("ID: " + id);
                System.out.println("Name: " + name);
                System.out.println("Created at: " + createdAt);
                System.out.println();
            }
        } catch(SQLException se) {
            // Handle errors for JDBC
            se.printStackTrace();
        } catch(Exception e) {
            // Handle errors for Class.forName
            e.printStackTrace();
        } finally {
            // Close resources
            try {
                if(rs != null) {
                    rs.close();
                }
                if(stmt != null) {
                    stmt.close();
                }
                if(conn != null) {
                    conn.close();
                }
            } catch(SQLException se) {
                se.printStackTrace();
            }
        }
        System.out.println("Done.");
    }
}

其中，需要将your_database_name、your_table_name、your_username和your_password替换为实际的数据库名称、表名称、用户名和密码。此外，该代码默认使用MySQL数据库，如果使用其他类型的数据库需要修改相应的JDBC驱动。