用户信息查询系统_daoImpl

package com.hopetesting.dao.impl;

import com.hopetesting.dao.UserDao;
import com.hopetesting.domain.User;
import com.hopetesting.utils.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * @author newcityman
 * @date 2019/9/7 - 21:07
 */
public class UserDaoImpl implements UserDao {
    private JdbcTemplate jdbcTemplate = new JdbcTemplate(JDBCUtils.getDataSource());

    @Override
    public List<User> findAllUser() {
        String sql = "select * from user";
        List<User> users = jdbcTemplate.query(sql, new BeanPropertyRowMapper<User>(User.class));
        return users;
    }

    @Override
    public User login(User user) {
        String sql = "select * from user where username=? and password=? ";
        User loginUser = jdbcTemplate.queryForObject(sql, new BeanPropertyRowMapper<>(User.class), user.getUsername(), user.getPassword());
        return loginUser;
    }

    @Override
    public void add(User user) {
        String sql = "insert into user values(null,?,?,?,?,?,?,null,null)";
        jdbcTemplate.update(sql, user.getName(), user.getGender(), user.getAge(), user.getAddress(), user.getQq(), user.getEmail());

    }

    @Override
    public void delUser(int id) {
        String sql = "delete from user where id=?";
        jdbcTemplate.update(sql, id);
    }

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

    @Override
    public void updateUserById(User user) {
        String sql="update user set name=?, gender=?, age=?, address=?, qq=?, email=? where id=?";
        jdbcTemplate.update(sql,user.getName(), user.getGender(), user.getAge(), user.getAddress(), user.getQq(), user.getEmail(),user.getId());
    }

    @Override
    public int findTotalCount(Map<String, String[]> condition) {
        //1、定义一个sql模板
        String sql="select count(*) from user where 1 = 1  ";
        StringBuilder sb = new StringBuilder(sql);
        //2、遍历map，拼装sql语句
        Set<String> keySet = condition.keySet();
        //定义一个参数的集合
        List<Object> parameters = new ArrayList<Object>();
        for (String key : keySet) {
            //获取value
            if("currentPage".equals(key) ||"rows".equals(key)){
                continue;
            }
            String value = condition.get(key)[0];
            if(value!=null && !"".equals(value)){
                sb.append(" and "+key+" like ?  ");
                parameters.add("%"+value+"%");  //?条件的值
            }
        }
       /* System.out.println(sb.toString());
        System.out.println(parameters);*/
        return jdbcTemplate.queryForObject(sb.toString(),Integer.class,parameters.toArray());
    }

    @Override
    public List<User> findByPage(int startIndex, int rows, Map<String, String[]> condition) {
       //1、定义一个末班初始化sql
        String sql="select * from user where 1 = 1  ";
        StringBuilder sb = new StringBuilder(sql);
       //2、遍历map
        Set<String> keySet = condition.keySet();
        //3、定义参数的集合
        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值
            String value = condition.get(key)[0];
//            判断value是否有值
            if(value!=null && !"".equals(value)){
//                有值
                sb.append(" and "+key+" 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(startIndex);
        params.add(rows);
       /* System.out.println(sb);
        System.out.println(params);*/
        return jdbcTemplate.query(sb.toString(),new BeanPropertyRowMapper<User>(User.class),params.toArray());
    }
}