DBConn.java

package test;
import java.sql.*;
public class DBConn{
 String driverName,url,name,pwd;
 Connection conn;
 public DBConn(){
  driverName="com.microsoft.jdbc.sqlserver.SQLServerDriver";
  url="jdbc:microsoft:sqlserver://localhost:1433; DatebaseName=test";
  name="sa";
  pwd="lszone";
 }
 public Connection get() throws Exception{
  Class.forName(driverName);
  conn=DriverManager.getConnection(url,name,pwd);
  return conn;
 }
 public static void main(String args[]) throws Exception{
  Connection conn=new DBConn().get();
  System.out.println(conn);
 }
}


test.java

package test;
import java.sql.*;
public class test{
 Connection conn;
 public test() throws Exception{
  conn=new DBConn().get();
 }
 public static void main(String args[]) throws Exception{
  Connection conn=new test().conn;
  String sql="select * from user";   
  Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
     ResultSet rs=stmt.executeQuery(sql);
        while(rs.next()){
         System.out.println(rs.getString(1));
        }
  System.out.println(conn);
}
}

提示居然是user附近有语法错误，我换个表名msg提示居然是对象不存在，我确定我确实有test数据库并且其中有msg和user表