读取Excel数据到数据库

项目用到的jar包：

 <!-- https://mvnrepository.com/artifact/org.apache.poi/poi --><dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.17</version></dependency><!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml-schemas --><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml-schemas</artifactId><version>3.17</version></dependency><!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml --><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.17</version></dependency><!-- https://mvnrepository.com/artifact/org.apache.poi/poi-examples --><dependency><groupId>org.apache.poi</groupId><artifactId>poi-examples</artifactId><version>3.9</version></dependency><!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.25</version></dependency><!-- https://mvnrepository.com/artifact/com.alibaba/druid --><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.10</version></dependency>

主要是POI的jar包，然后是连接数据库的连接包，阿里的数据连接池。
直接贴代码：

package cn.whuhhh.www.data;import java.io.IOException;
import java.io.InputStream;
import java.text.*;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellType;
import cn.whuhhh.www.dataStructure.*;public class Import {public static List<AdmissionTicket> importFromExcel(String fileName) throws IOException{List<AdmissionTicket> admissionTickets = new ArrayList<AdmissionTicket>();InputStream in = Import.class.getClassLoader().getResourceAsStream(fileName);//整个文档对象XSSFWorkbook workbook = new XSSFWorkbook(in);//单个sheet对象XSSFSheet sheet = workbook.getSheetAt(0);int lastRowNum = sheet.getLastRowNum();for (int i=1; i<=lastRowNum; i++) {//一行对象XSSFRow row = sheet.getRow(i);//XSSFCell cell = row.getCell(0);String name = getStringValue(row.getCell(0));String candidate = getStringValue(row.getCell(1));String idnumber = getStringValue(row.getCell(2));String gender = getStringValue(row.getCell(3));String subject = getStringValue(row.getCell(4));String address = getStringValue(row.getCell(5));String time = getStringValue(row.getCell(6));String seat = getStringValue(row.getCell(7));String email = getStringValue(row.getCell(8));AdmissionTicket admissionTicket = new AdmissionTicket(name, candidate, idnumber, gender,subject, address, time, seat, email);admissionTickets.add(admissionTicket);}workbook.close();return admissionTickets;}private static String getStringValue(Cell cell) {if(cell == null) {return "";}String cellValue = "";if(cell.getCellTypeEnum() == CellType.NUMERIC){if (HSSFDateUtil.isCellDateFormatted(cell)) {Date d =HSSFDateUtil.getJavaDate(cell.getNumericCellValue());DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");return df.format(d);} else {NumberFormat nf = NumberFormat.getInstance();cellValue = String.valueOf(nf.format(cell.getNumericCellValue())).replace(",", "");}}else if(cell.getCellTypeEnum() == CellType.STRING){cellValue = String.valueOf(cell.getStringCellValue());}else if(cell.getCellTypeEnum() == CellType.BOOLEAN){cellValue = String.valueOf(cell.getBooleanCellValue());}else if(cell.getCellTypeEnum() == CellType.ERROR){cellValue = "错误类型";}else {cellValue = "";}return cellValue;}
}

这里用的是POI的3.17版本，注意其一些方法与3.15版本还是有很多的不一致，注意这个getStringValue方法的写法。

连接数据库这部分参考我之前的写的blog。贴一部分插入的代码。

 /*** 批量添加准考证到数据库* @param tickets* @return */public static void addAll(List<AdmissionTicket> tickets) {Connection conn = null;try {conn = ConnectionFactory.getConnection();//防止恶意SQL注入，PreparedStatementconn.setAutoCommit(false);//构建数据库执行者PreparedStatement p = conn.prepareStatement("INSERT INTO admissionticket (StudentName, candidateNumber, idNumber, gender, subjects_, addrass, time, seat, email) "+"VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?);");for (AdmissionTicket at : tickets) {p.setString(1, at.getName());p.setString(2, at.getCandidateNumber());p.setString(3, at.getIdNumber());p.setString(4, at.getGender());p.setString(5, at.getSubject());p.setString(6, at.getAddress());p.setString(7, at.getTime());p.setString(8, at.getSeat());p.setString(9, at.getEmail());//结构类似就一起执行p.addBatch();}p.executeBatch();conn.commit();p.close();}catch(Exception e1) {e1.printStackTrace();try {//回滚事务？？？conn.rollback();}catch(SQLException e) {e.printStackTrace();}}finally {try {if(null != conn) {conn.close();}}catch(SQLException e) {e.printStackTrace();}}}

由模板制作准考证（word文档处理）

jar包依赖：

 <!-- https://mvnrepository.com/artifact/com.google.zxing/core --><dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.3.2</version></dependency><!-- https://mvnrepository.com/artifact/com.google.zxing/javase --><dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.3.2</version></dependency><!-- https://mvnrepository.com/artifact/fr.opensagres.xdocreport/org.apache.poi.xwpf.converter.pdf --><dependency><groupId>fr.opensagres.xdocreport</groupId><artifactId>org.apache.poi.xwpf.converter.pdf</artifactId><version>1.0.6</version></dependency><dependency><groupId>fr.opensagres.xdocreport</groupId><artifactId>org.apache.poi.xwpf.converter.xhtml</artifactId><version>1.0.6</version></dependency>

任务描述：

依据准考证的模板，读取数据库文件，完成文字替换，批量生成准考证。
制作二维码，在docx中插入图片。

准考证模板实例：

原理就是，读取这个模板文件，替换掉那些信息，顺便制作二维码插入到${pic}位置。

package cn.whuhhh.www.fileMaker;import fr.opensagres.xdocreport.itext.extension.font.IFontProvider;
import cn.whuhhh.www.dataStructure.AdmissionTicket;
import cn.whuhhh.www.dataStructure.ImageData;
import cn.whuhhh.www.fileMaker.QRCodeUtils;import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.util.Units;
import org.apache.poi.xwpf.converter.pdf.PdfConverter;
import org.apache.poi.xwpf.converter.pdf.PdfOptions;
import org.apache.poi.xwpf.usermodel.*;import com.lowagie.text.Font;
import com.lowagie.text.pdf.BaseFont;import java.io.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;public class DocxTemplateToPdfImpl {public static void generateAll(List<AdmissionTicket> tickets) throws IOException {for(AdmissionTicket ticket : tickets) {generateDocxAndPdf(ticket);}}public static void generateDocxAndPdf(AdmissionTicket admissionTicket) throws IOException {Map<String,Object> params = new HashMap<String, Object>();params.put("${can}", admissionTicket.getCandidateNumber());params.put("${add}", admissionTicket.getAddress());params.put("${name}", admissionTicket.getName());params.put("${gender}", admissionTicket.getGender());params.put("${subject}", admissionTicket.getSubject());params.put("${time}", admissionTicket.getTime());params.put("${seat}", admissionTicket.getSeat());String resource = "docx_template.docx";Map<String, ImageData> picParams = new HashMap<String, ImageData>();byte[] zxingqrCode = QRCodeUtils.createZxingqrCode(admissionTicket.getIdNumber());ImageData qrCode = new ImageData();qrCode.setData(zxingqrCode);picParams.put("${pic}", qrCode);try(InputStream inputStream = DocxTemplateToPdfImpl.class.getClassLoader().getResourceAsStream(resource)){XWPFDocument doc = new XWPFDocument(inputStream);//导入模板文件List<IBodyElement> ibes = doc.getBodyElements();for(IBodyElement ib:ibes) {if(ib.getElementType() == BodyElementType.TABLE) {replaceTable(ib, params, picParams, doc);}}PdfOptions options = PdfOptions.create();//中文字体处理options.fontProvider(new IFontProvider(){public Font getFont(String familyName, String encoding, float size, int stytle, java.awt.Color color) {try {BaseFont bfChinese = BaseFont.createFont("C:\\Windows\\Fonts\\STSONG.TTF",BaseFont.IDENTITY_H,BaseFont.EMBEDDED);Font fontChinese = new Font(bfChinese);if(familyName != null) {fontChinese.setFamily(familyName);   }return fontChinese;}catch(Exception e) {e.printStackTrace();return null;}}});//FileOutputStream os = new FileOutputStream(new File(admissionTicket.getCandidateNumber()+"_"+admissionTicket.getName()+".pdf"));//FileOutputStream os = new FileOutputStream(admissionTicket.getCandidateNumber()+"_"+admissionTicket.getName()+".pdf");//PdfConverter.getInstance().convert(doc, os, options);doc.write(new FileOutputStream(new File(admissionTicket.getCandidateNumber()+"_"+admissionTicket.getName()+".docx")));}catch(Exception e) {e.printStackTrace();}}public static void replaceTable(IBodyElement para, Map<String, Object> params, Map<String, ImageData> picParams, XWPFDocument indoc) throws Exception {Matcher matcher;XWPFTable table;List<XWPFTableRow> rows;List<XWPFTableCell> cells;table = (XWPFTable) para;rows = table.getRows();for(XWPFTableRow row : rows) {cells = row.getTableCells();int cellSize = cells.size();int cellCount = 0;for(cellCount = 0; cellCount<cellSize; cellCount++) {XWPFTableCell cell = cells.get(cellCount);String runtext = "";List<XWPFParagraph> ps = cell.getParagraphs();for(XWPFParagraph p:ps) {//表示一段文字？for(XWPFRun run:p.getRuns()) {runtext = run.text();matcher = matcher(runtext);if(matcher.find()) {if(picParams != null) {//遍历图片的键值对表for(String picKey : picParams.keySet()) {if(matcher.group().equals(picKey)) {run.setText("",0);replacePic(run, picParams.get(picKey),indoc);}}}if(params != null) {for(String picKey:params.keySet()) {if(matcher.group().equals(picKey)) {run.setText(params.get(picKey)+"", 0);}}}}}}}}}/*** 匹配到相应的位置*/private static Matcher matcher(String str) {Pattern pattern = Pattern.compile("\\$\\{(.+?)\\}", Pattern.CASE_INSENSITIVE);Matcher matcher = pattern.matcher(str);return matcher;}public static void replacePic(XWPFRun run, ImageData data, XWPFDocument doc) throws Exception{int format = Document.PICTURE_TYPE_PNG;ByteArrayInputStream inputStream = new ByteArrayInputStream(data.getData());run.addPicture(inputStream, format, "rpic", Units.toEMU(100), Units.toEMU(100));}
}

二维码制作方法：

package cn.whuhhh.www.fileMaker;import com.google.zxing.*;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageWriter;import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;public class QRCodeUtils {/** 定义二维码的宽高*/private static int WIDTH = 150;private static int HEIGHT = 150;private static String FORMAT = "png";// 生成二维码public static void createZxingqrCode(File file, String content) {//定义二维码参数Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();hints.put(EncodeHintType.CHARACTER_SET, "utf-8");//设置编码hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);//设置容错等级hints.put(EncodeHintType.MARGIN, 2);//设置默认边距try {BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);Path path = file.toPath();//写文件是写在该项目的根目录上。MatrixToImageWriter.writeToPath(bitMatrix, FORMAT, path);}catch(Exception e) {e.printStackTrace();}}//生成二维码public static byte[] createZxingqrCode(String content) {//定义二维码参数Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();hints.put(EncodeHintType.CHARACTER_SET, "utf-8");//设置编码hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);//设置容错等级hints.put(EncodeHintType.MARGIN, 2);//设置默认边距try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);//Path path = file.toPath();MatrixToImageWriter.writeToStream(bitMatrix, FORMAT, os);return os.toByteArray();}catch(Exception e) {e.printStackTrace();return null;}}public static void readZxingQrCode(File file) {MultiFormatReader reader = new MultiFormatReader();try {BufferedImage image = ImageIO.read(file);BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));Map<DecodeHintType, Object> hints = new HashMap<>();Result result = reader.decode(binaryBitmap, hints);System.out.println("解析结果："+result.toString());System.out.println("二维码格式："+result.getBarcodeFormat());System.out.println("二维码文本内容:"+result.getText());}catch(Exception e) {e.printStackTrace();}}public static void main(String[] args) {createZxingqrCode(new File("hhh.png"),"hhh is handsome");readZxingQrCode(new File("hhh.png"));}
}

总结

简单记录，多敲代码，哪怕现在照着别人的代码来敲，受益匪浅。java真的好繁琐，python就好很多了。

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demo1—java读取Excel文件到数据库、java制作准考证

文章目录

读取Excel数据到数据库

由模板制作准考证（word文档处理）

总结

demo1—java读取Excel文件到数据库、java制作准考证相关推荐

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