ssm项目分页查询实现

1.首先创建一个分页实体类PageBean

public class PageBean<T>{
    //总记录数
    private int totalCount;
    //总页码
    private int totalPage;
    //每页的数据
    private List<T>list;
    //当前页码
    private int currentPage;
    //每页显示的记录数
    private int rows;

    //get and set方法
}

2.controller层

@Autowrid
private UserService userService;

public String selectByPage(@RequestParam("currentPage")int currentPage,@RequestParam("rows")int rows,Model model){
    //查询
    PageBean<User>pb=userservice.selectByPage(currentPage,rows);
    //存入model中
    model.setObject("list",list);
    //转发
    return "user.jsp";
    
    
    
}

service层

public PageBean<User> selectByPage(int currentPage,int rows){
    //创建空的pagebean对象
    PageBean<User>pb=new PageBean<User>();

    //设置参数
    pb.setCurrentPage(currentPage);
    pb.setRows(rows);

    //调用dao查询总记录数
    int totalCount=userMapper.findTotalCount();
    pb.setTotalCount(totalCount);

    //查询list集合
    //计算刚开始查询的索引
    int start=(currentPage-1)*rows;
    List<User>list=userMapper.selectAll(start,rows);
    pb.setList(list);

    //计算总页码
    int totalPage = totalCount % rows ==0 ? totalCount/rows : totalCount/rows + 1 ;
    pb.setTotalPage(totalPage );

    return pb;


}

mybatis及UserServiceImpl略去.