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(); }}
来源：https://www.cnblogs.com/michaelcnblogs/p/12209890.html