如果‘小美’是想通过键盘输入，那需要怎么解决呢？

Scanner input =new Scanner(System.in);

String in=input.next();

param.put("value",in);

运行结果为：select * from imooc_goddess where 1=1 and user_name = ss   就提示错误：Unknown column 'ss' in 'where clause'