4.11每日总结

昨天的河北省科技政策查询系统需求项目没有整出来总记录，老师没让通过。

今天又修改了一下

package cn.itcase.dao.impl;

import cn.itcase.dao.UserDao;
import cn.itcase.domain.User;
import cn.itcase.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.xml.soap.Text;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class UserDaoImpl implements UserDao {

    private JdbcTemplate template= new JdbcTemplate(JDBCUtils.getDataSource());
    @Override
    public List<User> findAll() {
        /*
        * 使用jdbc
        * */
        String sql="select * from policy";
        List<User> users=template.query(sql,new BeanPropertyRowMapper<User>(User.class));
        return users;
    }





    @Override
    public User findById(int id) {
        String sql="select * from policy where id=?";
        return template.queryForObject(sql,new BeanPropertyRowMapper<User>(User.class), id);
    }



    @Override
    public int findTotalCount(Map<String, String[]> condition) {
        //1.定义模板初始化sql；
        String sql="select count(*) from policy where 1 = 1 ";
        StringBuilder sb=new StringBuilder(sql);
        //2.遍历map
        Set<String> keySet = condition.keySet();
        //定义参数集合
        List<Object> params = new ArrayList<Object>();
        for (String key :keySet){
            //排除分页条件参数
            if ("currentPage".equals(key) || "rows".equals(key)){
                continue;
            }
            //获取value
            String value = condition.get(key)[0];
            //判断value是否有值
            if (value != null && !"".equals(value)){
                //有值
                sb.append(" and ").append(key).append(" like ?");
                params.add("%"+value+"%");//条件的值
            }
        }
        System.out.println(sb.toString());
        System.out.println(params);

        return template.queryForObject(sb.toString(),int.class,params.toArray());
    }

    @Override
    public List<User> findByPage(int start, int rows, Map<String, String[]> condition) {
        String sql="select * from policy where 1 = 1 ";
        StringBuilder sb=new StringBuilder(sql);
        //2.遍历map
        Set<String> keySet = condition.keySet();
        //定义参数集合
        List<Object> params = new ArrayList<Object>();
        for (String key :keySet){
            //排除分页条件参数
            if ("currentPage".equals(key) || "rows".equals(key)){
                continue;
            }
            //获取value
            String value = condition.get(key)[0];
            //判断value是否有值
            if (value != null && !"".equals(value)){
                //有值
                sb.append(" and ").append(key).append(" like ?");
                params.add("%"+value+"%");//条件的值
            }
        }
        //添加分页查询
        sb.append(" limit ?,? ");
        //添加分页查询参数
        params.add(start);
        params.add(rows);

        return template.query(sb.toString(),new BeanPropertyRowMapper<User>(User.class),params.toArray());
    }

//    @Override
//    public User findUserByUsernameAndPassword(String username, String password) {
//        try {
//            String sql="select * from user where username=? and password=?";
//            User user=template.queryForObject(sql,new BeanPropertyRowMapper<User>(User.class)),username,password;
//            return user;
//        }catch (Exception e){
//            e.printStackTrace();
//            return null;
//        }
//
//
//    }
}

package cn.itcase.domain;

import java.util.List;

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

    public int getTotalCount() {
        return totalCount;
    }

    public void setTotalCount(int totalCount) {
        this.totalCount = totalCount;
    }

    public int getTotalPage() {
        return totalPage;
    }

    public void setTotalPage(int totalPage) {
        this.totalPage = totalPage;
    }

    public List<T> getList() {
        return list;
    }

    public void setList(List<T> list) {
        this.list = list;
    }

    public int getCurrentPage() {
        return currentPage;
    }

    public void setCurrentPage(int currentPage) {
        this.currentPage = currentPage;
    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        this.rows = rows;
    }

    @Override
    public String toString() {
        return "PageBean{" +
                "totalCount=" + totalCount +
                ", totalPage=" + totalPage +
                ", list=" + list +
                ", currentPage=" + currentPage +
                ", rows=" + rows +
                '}';
    }

    public PageBean(int totalCount, int totalPage, List<T> list, int currentPage, int rows) {
        this.totalCount = totalCount;
        this.totalPage = totalPage;
        this.list = list;
        this.currentPage = currentPage;
        this.rows = rows;
    }

    public PageBean() {
    }
}