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- package JDBC;
- import java.sql.*;
- public class JDBCDemo6 {
- private static String user = "vagrant";
- private static String password = "vagrant";
- public static void main(String[] args) throws Exception {
- try {
- //加载驱动程序
- Class.forName("com.mysql.jdbc.Driver");
- System.out.println("加载驱动成功");
- } catch (ClassNotFoundException e) {
- System.out.println("加载驱动失败");
- e.printStackTrace();
- }
- //JDBC的URL
- String url = "jdbc:mysql://127.0.0.1:33060/mydb";
- Connection connection = null;
- try {
- //调用DriverManager对象的getConnection()方法,获得一个Connection对象
- connection = DriverManager.getConnection(url, user, password);
- Statement state = connection.createStatement();
- System.out.println("连接成功");
- String sql = "DELETE FROM customer WHERE mid='D0006'";
- boolean hasResultSet = state.execute(sql);
- // 如果执行后有ResultSet结果集
- if (hasResultSet)
- {
- // 获取结果集
- ResultSet rs = state.getResultSet();
- // ResultSetMetaData是用于分析结果集的元数据接口
- ResultSetMetaData rsmd = rs.getMetaData();
- int columnCount = rsmd.getColumnCount();
- // 迭代输出ResultSet对象
- while (rs.next())
- {
- // 依次输出每列的值
- for (int i = 0 ; i < columnCount ; i++ )
- {
- System.out.println(rs.getString(i + 1));
- }
- System.out.print("\n");
- }
- }
- else
- {
- System.out.println("该SQL语句影响的记录有" + state.getUpdateCount() + "条");
- }
- state.close();
- connection.close();
- } catch (SQLException e) {
- e.printStackTrace();
- }
- }
- }
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