import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class DbUtil {
public static final String URL = "jdbc:mysql://localhost:3306/rent?useUnicode=true&characterEncoding=utf-8&useSSL=false";
public static final String USER = "root";
public static final String PASSWORD = "mxy2525624";
public static void main(String[] args) throws Exception {
//1.加載驅動程序
Class.forName("com.mysql.jdbc.Driver");
//2. 獲得數據庫連接
Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);
//3.操作數據庫,實現增刪改查
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT “userName” FROM userinfo");
//如果有數據,rs.next()返回true
while(rs.next()){
System.out.println(rs.getString("“userName”")+" 年齡:");
}
}
}
JDBC入門 DbUtil
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