Java导入导出Excel表格

你的名字 2022-08-03 05:05 322阅读 0赞

import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.text.SimpleDateFormat;
    import java.util.ArrayList;
    import java.util.List;
    
    import jxl.Cell;
    import jxl.CellType;
    import jxl.DateCell;
    import jxl.LabelCell;
    import jxl.NumberCell;
    import jxl.Sheet;
    import jxl.Workbook;
    import jxl.format.UnderlineStyle;
    import jxl.write.Boolean;
    import jxl.write.DateFormat;
    import jxl.write.DateTime;
    import jxl.write.Label;
    import jxl.write.Number;
    import jxl.write.NumberFormat;
    import jxl.write.WritableCell;
    import jxl.write.WritableCellFormat;
    import jxl.write.WritableFont;
    import jxl.write.WritableImage;
    import jxl.write.WritableSheet;
    import jxl.write.WritableWorkbook;
    
    public class excelTest {
    
    	public static List list = new ArrayList();
    
    	/**
    	 * 读取Excel
    	 * 
    	 * @param filePath
    	 */
    	public static void readExcel(String filePath) {
    		String data2 = "";
    		// DateTime tem=new DateTime("");
    		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    		try {
    			InputStream is = new FileInputStream(filePath);
    			Workbook rwb = Workbook.getWorkbook(is);
    			// Sheet st = rwb.getSheet("0")这里有两种方法获取sheet表,1为名字，而为下标，从0开始
    			Sheet st = rwb.getSheet("Sheet1");
    			int rs = st.getColumns();
    			int rows = st.getRows();
    			System.out.println("列数:" + rs + "  行数：" + rows);
    
    			for (int k = 1; k < rows; k++) {// 行
    				for (int i = 0; i < 5; i++) {// 列
    
    					Cell c00 = st.getCell(i, k);
    					System.out.println(c00.getType());
    
    					// 通用的获取cell值的方式,返回字符串
    					String strc00 = c00.getContents();
    					// 获得cell具体类型值的方式
    					if (c00.getType() == CellType.LABEL) {
    						LabelCell labelc00 = (LabelCell) c00;
    						strc00 = labelc00.getString();
    					}
    					// excel 类型为时间类型处理;
    					if (c00.getType() == CellType.DATE) {
    						DateCell dc = (DateCell) c00;
    						strc00 = sdf.format(dc.getDate());
    					}
    
    					/*
    					 * // excel 类型为数值类型处理; if (c00.getType() == CellType.NUMBER
    					 * || c00.getType() == CellType.NUMBER_FORMULA) { NumberCell
    					 * nc = (NumberCell) c00; strc00 = "" + nc.getValue(); }
    					 */
    
    					// 输出
    					System.out.println(">" + strc00);
    
    					list.add(strc00);
    
    					// 列，行
    					// data2=String.valueOf(st.getCell(4,k).getContents());
    					// data2=data2.replace("/", "-");
    					// java.util.Date dt=sdf.parse(data2);
    					// System.out.println(sdf.format(dt));
    				}
    				System.out
    						.println(data2 + "======" + list.get(k) + "=========");
    			}
    
    			// 关闭
    			rwb.close();
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    
    	/**
    	 * 输出Excel
    	 * 
    	 * @param os
    	 */
    	public static void writeExcel(OutputStream os) {
    		try {
    			/**
    			 * 只能通过API提供的工厂方法来创建Workbook，而不能使用WritableWorkbook的构造函数，
    			 * 因为类WritableWorkbook的构造函数为protected类型
    			 * method(1)直接从目标文件中读取WritableWorkbook wwb =
    			 * Workbook.createWorkbook(new File(targetfile)); method(2)如下实例所示
    			 * 将WritableWorkbook直接写入到输出流
    			 */
    			WritableWorkbook wwb = Workbook.createWorkbook(os);
    			// 创建Excel工作表 指定名称和位置
    			WritableSheet ws = wwb.createSheet("Test Sheet 1", 0);
    
    			// **************往工作表中添加数据*****************
    
    			// 1.添加Label对象
    			Label label = new Label(0, 0, "this is a label test");
    			ws.addCell(label);
    
    			// 添加带有字型Formatting对象
    			WritableFont wf = new WritableFont(WritableFont.TIMES, 18,
    					WritableFont.BOLD, true);
    			WritableCellFormat wcf = new WritableCellFormat(wf);
    			Label labelcf = new Label(1, 0, "this is a label test", wcf);
    			ws.addCell(labelcf);
    
    			// 添加带有字体颜色的Formatting对象
    			WritableFont wfc = new WritableFont(WritableFont.ARIAL, 10,
    					WritableFont.NO_BOLD, false, UnderlineStyle.NO_UNDERLINE,
    					jxl.format.Colour.RED);
    			WritableCellFormat wcfFC = new WritableCellFormat(wfc);
    			Label labelCF = new Label(2, 0, "This is a Label Cell", wcfFC);
    			ws.addCell(labelCF);
    
    			// 2.添加Number对象
    			Number labelN = new Number(0, 1, 3.1415926);
    			ws.addCell(labelN);
    
    			// 添加带有formatting的Number对象
    			NumberFormat nf = new NumberFormat("#.##");
    			WritableCellFormat wcfN = new WritableCellFormat(nf);
    			Number labelNF = new jxl.write.Number(1, 1, 3.1415926, wcfN);
    			ws.addCell(labelNF);
    
    			// 3.添加Boolean对象
    			Boolean labelB = new jxl.write.Boolean(2, 1, false);
    			ws.addCell(labelB);
    
    			// 4.添加DateTime对象
    			jxl.write.DateTime labelDT = new jxl.write.DateTime(0, 2,
    					new java.util.Date());
    			ws.addCell(labelDT);
    
    			// 添加带有formatting的DateFormat对象
    			DateFormat df = new DateFormat("dd MM yyyy hh:mm:ss");
    			WritableCellFormat wcfDF = new WritableCellFormat(df);
    			DateTime labelDTF = new DateTime(1, 2, new java.util.Date(), wcfDF);
    			ws.addCell(labelDTF);
    
    			// 添加图片对象,jxl只支持png格式图片
    			File image = new File("d://2.png");
    			// WritableImage(double x, double y, double width, double height,
    			// java.io.File image)这个方法
    			// 这边的width和height并不是图片的像数数值，而是占据几个单元格的意思
    			WritableImage wimage = new WritableImage(2, 2, 2, 2, image);
    			ws.addImage(wimage);
    
    			// 写入工作表
    			wwb.write();
    			wwb.close();
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    
    	/**
    	 * 拷贝后,进行修改,其中file1为被copy对象，file2为修改后创建的对象
    	 * 尽单元格原有的格式化修饰是不能去掉的，我们还是可以将新的单元格修饰加上去， 以使单元格的内容以不同的形式表现
    	 * 
    	 * @param file1
    	 * @param file2
    	 */
    	public static void modifyExcel(File file1, File file2) {
    		try {
    			Workbook rwb = Workbook.getWorkbook(file1);
    			WritableWorkbook wwb = Workbook.createWorkbook(file2, rwb);// copy
    			WritableSheet ws = wwb.getSheet(0);
    			WritableCell wc = ws.getWritableCell(0, 0);
    			// 判断单元格的类型,做出相应的转换
    			if (wc.getType() == CellType.LABEL) {
    				Label label = (Label) wc;
    				label.setString("The value has been modified");
    			}
    			wwb.write();
    			wwb.close();
    			rwb.close();
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    
    	// 测试
    	public static void main(String[] args) {
    		try {
    			// 读Excel
    			excelTest.readExcel("D:/test.xls");
    			// 输出Excel
    			// File fileWrite = new File("D:/testWrite.xls");
    			// fileWrite.createNewFile();
    			// OutputStream os = new FileOutputStream(fileWrite);
    			// excelTest.writeExcel(os);
    			// 修改Excel
    			// excelTest.modifyExcel(new File("D:/test.xls"),new
    			// File("D:/testWrite.xls"));
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    }