根据ResultSetMetaData对象动态创建pojo或其集合(JDBC)

数据库脚本：

public static void main(String[] args) throws Exception{

DBUtil db = new DBUtil();

String sql2 = "select * from t_user where id = ?";

User user = (User) db.get(User.class, sql2, new Object[]{4});

System.out.println(user.getId() + " : " + user.getUsername() + " : " + user.getUserpwd()) ;

String sql = "select * from t_user";

List list = db.find(User.class, sql, new Object[]{});

for (int i = 0; i < list.size(); i++) {

User user2 = (User) list.get(i);

System.out.println(user2.getId() + " : " + user2.getUsername() + " : " + user2.getUserpwd()) ;

}

}