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  • 用Java链接SQL Server

    public class ConData{
        private String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
        private String dbURL="jdbc:sqlserver://localhost:1433;DatabaseName=testData";
        private String userName;//="sa"
        private String userPwd;//="199369265"
        private Vector<Point> data=new Vector<Point>();
        private Connection dbConn;
        
        public ConData(String username,String password){
            userName=username;
            userPwd=password;        
        }
        public void Treat() throws IOException 
        {
            try{
                Class.forName(driverName);
                dbConn=DriverManager.getConnection(dbURL,userName,userPwd);          
                JOptionPane.showMessageDialog(null, "连接数据库成功");        
                
                Statement state=dbConn.createStatement();   
                ResultSet rs=state.executeQuery("select * from houst_data");
                int R=6370856;
                int cnt=0;
                while(rs.next()){
                    String name=rs.getString(1);
                    double x=rs.getDouble(3);//可以采用列号,也可以采用列名,如"X"
                    double y=rs.getDouble(4);
                    int price=rs.getInt(5);                
                    data.addElement(new Point(name,x,y,price,cnt));    
                    cnt++;
                }
            }
            catch(Exception e){
                e.printStackTrace();
                System.out.print("连接失败!");
            }                     
        }
    }
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  • 原文地址:https://www.cnblogs.com/54zyq/p/3971241.html
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