package DBHelper;
import java.sql.*
;
public class Demo {
public static void main(String[] args) {
String driver = "com.mysql.jdbc.Driver"
;
String dbName = "test"
;
String passwrod = "root"
;
String userName = "root"
;
String url = "jdbc:mysql://localhost:3306/" +
dbName;
String sql = "select * from test"
;
try {
Class.forName(driver);
Connection conn =
DriverManager.getConnection(url, userName,
passwrod);
PreparedStatement ps =
conn.prepareStatement(sql);
ResultSet rs =
ps.executeQuery();
while (rs.next()) {
System.out.println("id : " + rs.getInt(1) + " name : "
+ rs.getString(2
) );
}
// 关闭记录集
if (rs !=
null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
// 关闭声明
if (ps !=
null) {
try {
ps.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
// 关闭链接对象
if (conn !=
null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
转载于:https://www.cnblogs.com/zhaocundang/p/4909192.html
