JDBC:execute方法示例1
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();
}
}
}