main连接数据库

package cn.gson.oasys.common;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.jdbc.ScriptRunner;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.sql.*;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;


public class ReadExcelUtils {

    public static void run() {
        try {
            // 获取数据库相关配置信息
            Properties props = Resources.getResourceAsProperties("application.properties");

            // jdbc 连接信息: 注: 现在版本的JDBC不需要配置driver，因为不需要Class.forName手动加载驱动
            String url = props.getProperty("spring.datasource.url");
            String username = props.getProperty("spring.datasource.username");
            String password = props.getProperty("spring.datasource.password");

            // 建立连接
            Connection conn = DriverManager.getConnection(url, username, password);

            Statement stmt = conn.createStatement() ;
            Statement stmt1 = conn.createStatement() ;

            String sql = "select * from aoa_user";//要执行的SQL

            /*在询数据表时，需要用到ResultSet接口，它类似于一个数据表，通过该接口的实例可以获得检索结果集，以及对应数据表的接口信息。*/
            ResultSet rs = stmt.executeQuery(sql);//

            try {
                String filepath = "C:\Users\Michael\Downloads\Telegram Desktop\a04.xlsx";
                ReadExcelUtils excelReader = new ReadExcelUtils(filepath);

                // 对读取Excel表格内容测试
                Map<Integer, Map<Integer,Object>> map = excelReader.readExcelContent();
                System.out.println("获得Excel表格的内容:");
                while (rs.next()) {
                    if (rs.getString(22).equals("admin")){
                        continue;
                    }
                    for (int i = 1; i <= map.size(); i++) {
                        String[] d = map.get(i).get(4).toString().split("\.");//工号
                        String name = map.get(i).get(5).toString();//工号

                        if (rs.getString(22).equals(name)){
                            String upSql = "UPDATE aoa_user SET work_code = '"+d[0]+"' WHERE user_name = "+"'"+rs.getString(22)+"'";
                            System.out.println(upSql);
                            stmt1.executeUpdate(upSql);//
                        }
                    }

                }
            } catch (FileNotFoundException e) {
                System.out.println("未找到指定路径的文件!");
                e.printStackTrace();
            }catch (Exception e) {
                e.printStackTrace();
            }

            // 关闭连接
            conn.close();

            // 若成功，打印提示信息
            System.out.println("====== SUCCESS ======");
        } catch (IOException | SQLException e) {
            e.printStackTrace();
        }
    }


    private Logger logger = LoggerFactory.getLogger(ReadExcelUtils.class);
    private Workbook wb;
    private Sheet sheet;
    private Row row;

    public ReadExcelUtils(String filepath) {
        if(filepath==null){
            return;
        }
        String ext = filepath.substring(filepath.lastIndexOf("."));
        try {
            InputStream is = new FileInputStream(filepath);
            if(".xls".equals(ext)){
                wb = new HSSFWorkbook(is);
            }else if(".xlsx".equals(ext)){
                wb = new XSSFWorkbook(is);
            }else{
                wb=null;
            }
        } catch (FileNotFoundException e) {
            logger.error("FileNotFoundException", e);
        } catch (IOException e) {
            logger.error("IOException", e);
        }
    }

    /**
     * 读取Excel表格表头的内容
     *
     * @param InputStream
     * @return String 表头内容的数组
     * @author zengwendong
     */
    public String[] readExcelTitle() throws Exception{
        if(wb==null){
            throw new Exception("Workbook对象为空！");
        }
        sheet = wb.getSheetAt(0);
        row = sheet.getRow(0);
        // 标题总列数
        int colNum = row.getPhysicalNumberOfCells();
        System.out.println("colNum:" + colNum);
        String[] title = new String[colNum];
        for (int i = 0; i < colNum; i++) {
            // title[i] = getStringCellValue(row.getCell((short) i));
            title[i] = row.getCell(i).getCellFormula();
        }
        return title;
    }

    /**
     * 读取Excel数据内容
     *
     * @param InputStream
     * @return Map 包含单元格数据内容的Map对象
     * @author zengwendong
     */
    public Map<Integer, Map<Integer,Object>> readExcelContent() throws Exception{
        if(wb==null){
            throw new Exception("Workbook对象为空！");
        }
        Map<Integer, Map<Integer,Object>> content = new HashMap<Integer, Map<Integer,Object>>();

        sheet = wb.getSheetAt(0);
        // 得到总行数
        int rowNum = sheet.getLastRowNum();
        row = sheet.getRow(0);
        int colNum = row.getPhysicalNumberOfCells();
        // 正文内容应该从第二行开始,第一行为表头的标题
        for (int i = 1; i <= rowNum; i++) {
            row = sheet.getRow(i);
            int j = 0;
            Map<Integer,Object> cellValue = new HashMap<Integer, Object>();
            while (j < colNum) {
                Object obj = getCellFormatValue(row.getCell(j));
                cellValue.put(j, obj);
                j++;
            }
            content.put(i, cellValue);
        }
        return content;
    }

    /**
     *
     * 根据Cell类型设置数据
     *
     * @param cell
     * @return
     * @author zengwendong
     */
    private Object getCellFormatValue(Cell cell) {
        Object cellvalue = "";
        if (cell != null) {
            // 判断当前Cell的Type
            switch (cell.getCellType()) {
                case Cell.CELL_TYPE_NUMERIC:// 如果当前Cell的Type为NUMERIC
                case Cell.CELL_TYPE_FORMULA: {
                    // 判断当前的cell是否为Date
                    if (DateUtil.isCellDateFormatted(cell)) {
                        // 如果是Date类型则，转化为Data格式
                        // data格式是带时分秒的：2013-7-10 0:00:00
                        // cellvalue = cell.getDateCellValue().toLocaleString();
                        // data格式是不带带时分秒的：2013-7-10
                        Date date = cell.getDateCellValue();
                        cellvalue = date;
                    } else {// 如果是纯数字

                        // 取得当前Cell的数值
                        cellvalue = String.valueOf(cell.getNumericCellValue());
                    }
                    break;
                }
                case Cell.CELL_TYPE_STRING:// 如果当前Cell的Type为STRING
                    // 取得当前的Cell字符串
                    cellvalue = cell.getRichStringCellValue().getString();
                    break;
                default:// 默认的Cell值
                    cellvalue = "";
            }
        } else {
            cellvalue = "";
        }
        return cellvalue;
    }

    public static void main(String[] args) {
        run();

    }
}