ArrayList<user> list=new ArrayList<user>();
while(rs.next()){
user u=new user();
u.setId(rs.getInt("id"));
u.setName(rs.getString("name"));
u.setPassword(rs.getString("password"));
u.setEmail(rs.getString("email"));
u.setBirthday(rs.getDate("birthday"));
//将对象添加到集合中
list.add(u);
这段代码中user u=new user();放在循环外面跟放在虚幻里面有什么区别,为什么要放在循环里面?