微软的jdbc驱动太烂了，以后用jtds
错误原因：数据库里面有text型或者image之后，不按照顺序取值会报错！
错误代码：ResultSet can not re-read row data for column
解决方案： stm=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
更新jdbc包换为jtds
数据库代码：
public class ConnDatabase {
String jdbcDriver;
String connURL;
String userName;
String passWord;
Statement stmt;
ResultSet res;
Connection con;
public ConnDatabase(){
jdbcDriver = "net.sourceforge.jtds.jdbc.Driver";
connURL = "jdbc:jtds:sqlserver://localhost:1433/cspc4java";
userName = "sa";
passWord = "sa";
}
public Statement connData(){
try{
Class.forName(jdbcDriver);
con = DriverManager.getConnection(connURL, userName, passWord);
stmt = con.createStatement();
}catch(Exception e){
e.printStackTrace();
}
return stmt;
}
}