myqsl分页

不废话直接上代码

 1 public class Fenye {
 2     static Connection conn = null;
 3     static int count;//总行数
 4     static{
 5         try {
 6             Class.forName("com.mysql.jdbc.Driver");
 7             conn = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/xl", "root", "1234");
 8             PreparedStatement ps = conn.prepareStatement("SELECT CEIL(COUNT(id)/2) FROM user");
 9             ResultSet rs = ps.executeQuery();
10         while(rs.next()){
11             count = rs.getInt(1);
12         }
13         } catch (ClassNotFoundException e) {
14             e.printStackTrace();
15         } catch (SQLException e) {
16             e.printStackTrace();
17         }
18
19     }
20     public static List<User> getList(int index){
21         List<User> list = new ArrayList<>();
22         try {
23             String sql = "select id,name,age from user LIMIT ?,?";
24             PreparedStatement ps= conn.prepareStatement(sql);
25             ps.setInt(1, (index-1)*2);
26             ps.setInt(2, 2);
27             ResultSet rs = ps.executeQuery();
28             while(rs.next()){
29                 list.add(new User(rs.getInt("id"),rs.getString("name"),rs.getInt("age")));
30             }
31             conn.close();
32             return list;
33         } catch (SQLException e) {
34             e.printStackTrace();
35         }
36         return list;
37     }
38 }

数据库插入5条数据，试试效果：

public static void main(String[] args) {
        System.out.println(getList(1).size());//第1页 查到2行
        System.out.println(getList(2).size());//第2页 查到2行
        System.out.println(getList(3).size());//第3页 查到1行
}    

效果出来了

写的不好欢迎大家指教