JdbcTemplateUtils

package com.meeno.common.utils;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.meeno.siliandan.area.entity.MiningArea;
import com.meenoframework.util.PageData;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.ss.formula.functions.T;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Component;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @Author: GoslingWu
 * @Date: Created in 2020/11/11
 * @Description: JDBC工具类
 */
@Component
@Slf4j
public class JdbcTemplateUtils {

    private static JdbcTemplate jdbcTemplate;

    @Autowired
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate){
        JdbcTemplateUtils.jdbcTemplate = jdbcTemplate;
    }

    /**
     * jdbc分页
     * @param sql
     * @param params
     * @param pageable
     * @param clazz
     * @param <T>
     * @return
     */
    public static  <T> PageData<T> page(String sql, List<Object> params, Pageable pageable, Class<T> clazz){
        return page(sql, params, (int) pageable.getOffset(), pageable.getPageSize(), clazz);
    }

    /**
     * jdbc分页
     * @param sql
     * @param params
     * @param pageIndex
     * @param pageSize
     * @param clazz
     * @param <T>
     * @return
     */
    public static  <T> PageData<T> page(String sql, List<Object> params, Integer pageIndex, Integer pageSize, Class<T> clazz){

        String selectSql = " select * ";
        Integer index = pageIndex;
        String limit = " limit " + index + " , " + pageSize;
        String resultSql = selectSql + sql + limit;
        List<Map<String, Object>> mapList = jdbcTemplate.queryForList(resultSql, params.toArray());

        List<T> list = mapList.stream()
                .map(stringObjectMap -> JSONObject.parseObject(JSONObject.toJSONString(stringObjectMap), clazz))
                .collect(Collectors.toList());

        String countSql = " select count(*) ";
        Long count = jdbcTemplate.queryForObject(countSql + sql, params.toArray(), Long.class);

        PageData<T> pageData = new PageData<T>(count, list);

        return pageData;
    }

}