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首先要连接数据库，这是模板： `public class mysql { public static void main(String[] args) { //声明Connection对象 Connection con; //驱动程序名 String driver = “com.mysql.jdbc.Driver”; //URL指向要访问的数据库名mydata String url = “jdbc:mysql://localhost:3306/test”; //MySQL配置时的用户名 String user = “root”; //MySQL配置时的密码 String password = “123456”; //遍历查询结果集 try { //加载驱动程序 Class.forName(driver); //1.getConnection()方法，连接MySQL数据库！！ con = DriverManager.getConnection(url,user,password); if(!con.isClosed()) System.out.println(“Succeeded connecting to the Database!”); //2.创建statement类对象，用来执行SQL语句！！ Statement statement = con.createStatement(); //要执行的SQL语句 String sql = “select * from chengyu”; //3.ResultSet类，用来存放获取的结果集！！ ResultSet rs = statement.executeQuery(sql); System.out.println("-----------------"); System.out.println(“执行结果如下所示:”); System.out.println("-----------------"); System.out.println(“序号” + “\t” + “成语”); System.out.println("-----------------"); String name = null;
String id = null;
while(rs.next()){
//获取stuname这列数据
id = rs.getString("id");
//获取stuid这列数据
name = rs.getString("name");
//输出结果
System.out.println(id + "\t" + name);
}
rs.close();
con.close();
} catch(ClassNotFoundException e) {
//数据库驱动类异常处理
System.out.println("Sorry,can`t find the Driver!");
e.printStackTrace();
} catch(SQLException e) {
//数据库连接失败异常处理
e.printStackTrace();
}catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}finally{
System.out.println("数据库数据成功获取！！");
}
}
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