• JAVA中生成Excel方法


      java 操作 Excel 最常用的就是JXL(java excel api)和POI,今先看下JXL吧。首先可以到 http://www.andykhan.com/jexcelapi/download.html  下载最新的jxl.jar,里面有它的jar包和API,内有一个小例子,可以参考一下。

        JXL 用起来挺简单的,不过相应的其功能也并不是十分强大,对于一般的简单的excel操作还可以,对于太复杂的还是有些吃力,基本的操作也就是以下几项内容。

        首先,要创建一个可读写的工作簿(WritableWorkbook):

    WritableWorkbook workbook = Workbook.createWorkbook(new File("d:\test.xls"));

    如果是想要修改一个已存在的excel工作簿,则需要先获得它的原始工作簿,再创建一个可读写的副本:

    Workbook wb = Workbook.getWorkbook(new File("src\test\test.xls")); // 获得原始文档
    WritableWorkbook workbook = Workbook.createWorkbook(new File("d:\test_modified.xls"),wb); // 创建一个可读写的副本

    然后,取得我们要操作的sheet,并对其进行相应的操作,如改名、合并单元格、设置列宽、行高等:

    WritableSheet sheet = workbook.getSheet(0);
    sheet.setName("修改后"); // 给sheet页改名
    workbook.removeSheet(2); // 移除多余的标签页
    workbook.removeSheet(3);
            
    sheet.mergeCells(0, 0, 4, 0); // 合并单元格
    sheet.setRowView(0, 600); // 设置行的高度
    sheet.setColumnView(0, 30); // 设置列的宽度
    sheet.setColumnView(1, 20); // 设置列的宽度

    之后,就是对单元格的操作了,可以通过如下方法获取一个单元格,其中两个参数分别为列、行的位置,从0开始计数,如(2,3)就代表单元格C4:

    WritableCell cell = sheet.getWritableCell(2,3);

    通过WritableFont、WritableCellFormat等对象可以设置单元格的字体、样式等外观:

    WritableFont titleWf = new WritableFont(WritableFont.createFont("仿宋_GB2312"),// 字体
                                 20,//WritableFont.DEFAULT_POINT_SIZE,   // 字号
                                 WritableFont.NO_BOLD,                   // 粗体
                                 false,                                   // 斜体
                                 UnderlineStyle.NO_UNDERLINE,            // 下划线
                                 Colour.BLUE2,                        // 字体颜色
                                 ScriptStyle.NORMAL_SCRIPT);
    WritableCellFormat wcf = new WritableCellFormat(titleWf);
    wcf.setBackground(Colour.GRAY_25);// 设置单元格的背景颜色
    wcf.setAlignment(Alignment.CENTRE); // 设置对齐方式
    wcf.setBorder(Border.ALL, BorderLineStyle.THICK); // 添加边框
    cell.setCellFormat(wcf);

    在jxl中,有几种常用的数据类型,根据单元格内数据类型的不同,每个WritableCell可以根据其类型被转换为它的一个子类型,以便对不同类型的数据进行专门的处理,通常可以做这样的转换:

    WritableCell fromCell = sheet0.getWritableCell(j, i);
    
    if (fromCell instanceof jxl.write.Number) {
        jxl.write.Number num = (jxl.write.Number) fromCell;
    } else if (fromCell instanceof jxl.write.Boolean) {
        jxl.write.Boolean bool = (jxl.write.Boolean) fromCell;
    } else if (fromCell instanceof jxl.write.DateTime) {
        jxl.write.DateTime dt = (jxl.write.DateTime) fromCell;
    } else if(fromCell instanceof Label){
        Label _label = (Label) fromCell;
    }

    当然,操作完成之后一定不要忘了刷新(或者叫写入?)和关掉工作簿:

     workbook.write();
     workbook.close();

    下面是参考jxl api里那个例子写的,把我自己觉得常用的excel操作基本都包含了:

    package test;
    
    import java.io.File;
    import java.io.IOException;
    import java.net.MalformedURLException;
    import java.net.URL;
    import java.util.ArrayList;
    import java.util.Calendar;
    import java.util.Date;
    
    import jxl.CellType;
    import jxl.Workbook;
    import jxl.format.Alignment;
    import jxl.format.Border;
    import jxl.format.BorderLineStyle;
    import jxl.format.Colour;
    import jxl.format.ScriptStyle;
    import jxl.format.UnderlineStyle;
    import jxl.format.VerticalAlignment;
    import jxl.read.biff.BiffException;
    import jxl.write.Blank;
    import jxl.write.DateFormat;
    import jxl.write.DateFormats;
    import jxl.write.DateTime;
    import jxl.write.Formula;
    import jxl.write.Label;
    import jxl.write.Number;
    import jxl.write.NumberFormat;
    import jxl.write.WritableCell;
    import jxl.write.WritableCellFeatures;
    import jxl.write.WritableCellFormat;
    import jxl.write.WritableFont;
    import jxl.write.WritableHyperlink;
    import jxl.write.WritableImage;
    import jxl.write.WritableSheet;
    import jxl.write.WritableWorkbook;
    import jxl.write.WriteException;
    
    /**
     * 
     * @author why
     *
     */
    public class ExcelTest {
    
        /**
         * @param args
         * @throws IOException 
         * @throws BiffException 
         * @throws WriteException 
         */
        public static void main(String[] args) throws IOException, BiffException, WriteException {
            Workbook wb = Workbook.getWorkbook(new File("src\test\test.xls")); // 获得原始文档
            WritableWorkbook workbook = Workbook.createWorkbook(new File("d:\test_modified.xls"),wb); // 创建一个可读写的副本
            
            
            /**
             * 定义与设置Sheet
             */
            WritableSheet sheet = workbook.getSheet(0);
            sheet.setName("修改后"); // 给sheet页改名
            workbook.removeSheet(2); // 移除多余的标签页
            workbook.removeSheet(3);
            
            sheet.mergeCells(0, 0, 4, 0); // 合并单元格
            sheet.setRowView(0, 600); // 设置行的高度
            sheet.setColumnView(0, 30); // 设置列的宽度
            sheet.setColumnView(1, 20); // 设置列的宽度
            
             WritableCell cell = null;
             WritableCellFormat wcf = null;
             Label label = null;
             WritableCellFeatures wcfeatures = null;
            
             // 更改标题字体
             cell = sheet.getWritableCell(0,0);
             WritableFont titleWf = new WritableFont(WritableFont.createFont("仿宋_GB2312"),// 字体
                                                      20,//WritableFont.DEFAULT_POINT_SIZE,  // 字号
                                                      WritableFont.NO_BOLD,                    // 粗体
                                                      false,                                     // 斜体
                                                      UnderlineStyle.NO_UNDERLINE,            // 下划线
                                                      Colour.BLUE2,                            // 字体颜色
                                                      ScriptStyle.NORMAL_SCRIPT);
             wcf = new WritableCellFormat(titleWf);
             wcf.setBackground(Colour.GRAY_25);// 设置单元格的背景颜色
             wcf.setAlignment(Alignment.CENTRE); // 设置对齐方式
             wcf.setBorder(Border.ALL, BorderLineStyle.THICK); // 添加边框
             cell.setCellFormat(wcf);
            
             // 将B3的字体改为仿宋_GB2312
             cell = sheet.getWritableCell(1,2);
             WritableFont fs = new WritableFont(WritableFont.createFont("仿宋_GB2312"),
                                               11);
             wcf = new WritableCellFormat(fs);
             cell.setCellFormat(wcf);
            
             // 将B4的字号改为20
             cell = sheet.getWritableCell(1,3);
             WritableFont size20 = new WritableFont(WritableFont.createFont("宋体"), 
                                                   20);
             wcf = new WritableCellFormat(size20);
             cell.setCellFormat(wcf);
            
             // 将B5的字体改为加粗
             cell = sheet.getWritableCell(1,4);
             WritableFont bold = new WritableFont(WritableFont.createFont("宋体"), 
                                                   11,
                                                   WritableFont.BOLD);
             wcf = new WritableCellFormat(bold);
             cell.setCellFormat(wcf);
            
             // 将B6的字体改为倾斜
             cell = sheet.getWritableCell(1,5);
             WritableFont italic = new WritableFont(WritableFont.createFont("宋体"), 
                                                     11,
                                                     WritableFont.NO_BOLD,
                                                     true);
             wcf = new WritableCellFormat(italic);
             cell.setCellFormat(wcf);
            
             // 将B7字体加下划线
             cell = sheet.getWritableCell(1,6);
             WritableFont underline = new WritableFont(WritableFont.createFont("宋体"), 
                                                        11,
                                                        WritableFont.NO_BOLD,
                                                        false,
                                                        UnderlineStyle.SINGLE);
             wcf = new WritableCellFormat(underline);
             cell.setCellFormat(wcf);
            
             // 将B8的文字改为“待修改文字-已修改”
             cell = sheet.getWritableCell(1,7);
             if (cell.getType() == CellType.LABEL)
             {
                 Label lc = (Label) cell;
                 lc.setString(lc.getString() + " - 已修改");
             }
            
             // 将B9文字对齐方式改为垂直居中、右对齐
             cell = sheet.getWritableCell(1,8);
             WritableFont align = new WritableFont(WritableFont.createFont("宋体"), 
                                                      11);
             wcf = new WritableCellFormat(align);
             wcf.setAlignment(Alignment.RIGHT); // 设置为右对齐
             wcf.setVerticalAlignment(VerticalAlignment.CENTRE); // 设置为垂直居中
             cell.setCellFormat(wcf);
            
             // 将E3文字改为自动换行
             cell = sheet.getWritableCell(4,2);
             WritableFont justify = new WritableFont(WritableFont.createFont("宋体"), 
                                                      11);
             wcf = new WritableCellFormat(justify);
             wcf.setAlignment(Alignment.JUSTIFY);
             cell.setCellFormat(wcf);
            
            
             // 将B12的数字有效位数从5位改为7位
             cell = sheet.getWritableCell(1,11);
             NumberFormat sevendps = new NumberFormat("#.0000000");
             wcf = new WritableCellFormat(sevendps);
             cell.setCellFormat(wcf);
            
             // 将B13改为4位科学计数法表示
             cell = sheet.getWritableCell(1,12);
             NumberFormat exp4 = new NumberFormat("0.####E0");
             wcf = new WritableCellFormat(exp4);
             cell.setCellFormat(wcf);
            
             // 将B14改为默认数字表示
             cell = sheet.getWritableCell(1,13);
             cell.setCellFormat(WritableWorkbook.NORMAL_STYLE);
            
             // 将B15数字类型的值17改为22
             cell = sheet.getWritableCell(1,14);
             if (cell.getType() == CellType.NUMBER)
             {
                 Number n = (Number) cell;
                 n.setValue(42);
             }
            
             // 将B16的值2.71进行加法运算2.71 + 0.1
             cell = sheet.getWritableCell(1,15);
             if (cell.getType() == CellType.NUMBER)
             {
                 Number n = (Number) cell;
                 n.setValue(n.getValue() + 0.1);
             }
            
             // 将B19日期格式改为默认
             cell = sheet.getWritableCell(1,18);
             wcf = new WritableCellFormat(DateFormats.FORMAT9);
             cell.setCellFormat(wcf);
            
             // 将B20日期格式改为dd MMM yyyy HH:mm:ss
             cell = sheet.getWritableCell(1,19);
             DateFormat df = new DateFormat("dd MMM yyyy HH:mm:ss");
             wcf = new WritableCellFormat(df);
             cell.setCellFormat(wcf);
            
             // 将B21的日期设置为 2011-6-1 11:18:50
             cell = sheet.getWritableCell(1,20);
             if (cell.getType() == CellType.DATE)
             {
                 DateTime dt = (DateTime) cell;
                 Calendar cal = Calendar.getInstance();
                 cal.set(2011, 5, 1, 11, 18, 50);
                 Date d = cal.getTime();
                 dt.setDate(d);
             }
            
            
             // 将B24文字添加链接http://www.baidu.com
             WritableHyperlink link = new WritableHyperlink(1, 23, new URL("http://www.baidu.com"));
             sheet.addHyperlink(link);
            
             // 更改URL链接
             WritableHyperlink hyperlinks[] = sheet.getWritableHyperlinks();
             for (int i = 0; i < hyperlinks.length; i++) {
                 WritableHyperlink wh = hyperlinks[i];
                 if (wh.getColumn() == 1 && wh.getRow() == 24) {
                     // 将B25文字链接取消
                     sheet.removeHyperlink(wh,true);//true:保留文字;false:删除文字
                 }else if(wh.getColumn() == 1 && wh.getRow() == 25){
                     try {
                         // 将B26链接更改为http://wuhongyu.javaeye.com
                         wh.setURL(new URL("http://wuhongyu.javaeye.com"));
                     } catch (MalformedURLException e) {
                         e.printStackTrace();
                     }
                 }
             }
            
            
             // 利用公式取得B29、B30的值
             Formula f1 = new Formula(1, 28, "SUM(C29:D29)");
             sheet.addCell(f1);
             Formula f2 = new Formula(1, 29, "AVERAGE(C30:G30)");
             sheet.addCell(f2);
            
             // 在B32处添加图片,图片大小占10行3列,只支持png格式
             File file = new File("d:\shu05.png");
             WritableImage image = new WritableImage(1, 31, 3, 10, file);
             sheet.addImage(image);
            
             // 在A44出添加内容"Added drop down validation",并为其添加注释
             label = new Label(0, 43, "Added drop down validation");
             wcfeatures = new WritableCellFeatures();
             wcfeatures.setComment("右边列是个下拉列表");
             label.setCellFeatures(wcfeatures);
             sheet.addCell(label);
             
             // 在B44处添加一个下拉列表并添加注释
             Blank b = new Blank(1, 43);
             wcfeatures = new WritableCellFeatures();
             ArrayList al = new ArrayList();
             al.add("why");
             al.add("landor");
             al.add("tjm");
             wcfeatures.setDataValidationList(al);
             wcfeatures.setComment("这是一个注释");
             b.setCellFeatures(wcfeatures);
             sheet.addCell(b);
             
             // 为A46添加注释。
             // 此处比较麻烦,试了多次发现必须将cell强制类型转换、添加CellFeatures再修改注释才可用,不知有没有更好的办法。
             cell = sheet.getWritableCell(0,45);
             wcfeatures = new WritableCellFeatures();
             wcfeatures.setComment("这个注释不会被显示,删了这行还不行,MD");
             cell.setCellFeatures(wcfeatures);
             
             label = (Label) cell;
    //         label.setCellFeatures(wcfeatures);// 直接这样写会报一个警告(“注释已存在”),但那个注释仍会被显示。
             label.addCellFeatures();
             label.getWritableCellFeatures().setComment("终于加上注释了,哈哈哈哈");
             
             
    //        if (cell instanceof Number) {
    //            Number num = (Number) cell;
    //            num.setCellFeatures(wcfeatures);
    //        } else if (cell instanceof jxl.write.Boolean) {
    //            jxl.write.Boolean bool = (jxl.write.Boolean) cell;
    //            bool.setCellFeatures(wcfeatures);
    //        } else if (cell instanceof jxl.write.DateTime) {
    //            jxl.write.DateTime dt = (jxl.write.DateTime) cell;
    //            dt.setCellFeatures(wcfeatures);
    //        } else {
    //            Label _label = (Label) cell;
    //            _label.setCellFeatures(wcfeatures);
    //        }
             
             workbook.write();
             workbook.close();
             wb.close();
        }
    
    }

    xl读取excel和写excel基本类似,只是WritableWorkbook换成了Workbook; WritableSheet换成了 Sheet ;Label 换成了Cell。

    import java.io.File;
    import java.io.IOException;
    import jxl.Cell;
    import jxl.Sheet;
    import jxl.Workbook;
    import jxl.read.biff.BiffException;
    public class ReadExcel {
     public static void main(String[] args) {
      try {  
                //选取指定的excel  
                Workbook workbook = Workbook.getWorkbook(new File("F:\test.xls"));  
                //选取制定的sheet  
                Sheet sheet = workbook.getSheet(0);  
                //选取指定的cell  
                //遍历循环得到所要的cell值  
                for(int j = 0 ;j<sheet.getRows() ; j++)  
                        for(int i = 0 ;i<sheet.getColumns();i++){  
                Cell cell = sheet.getCell(i,j);  
                //获取该cell的值  
                String var1 = cell.getContents();  
                //打印输出该值  
                System.out.println(var1);  
                }  
        } catch (BiffException e) {  
                e.printStackTrace();  
        } catch (IOException e) {  
                e.printStackTrace();  
        }  
    
      }
     }
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  • 原文地址:https://www.cnblogs.com/jinzhiming/p/5336294.html
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