Java实现Excel表格操作--API:jxl

<!-- https://mvnrepository.com/artifact/net.sourceforge.jexcelapi/jxl -->
<dependency>
    <groupId>net.sourceforge.jexcelapi</groupId>
    <artifactId>jxl</artifactId>
    <version>2.6.12</version>
</dependency>

package com.jxl.excel;

import java.io.File;

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableImage;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

/**
 * Excel表格操作
 * 
 * @author Administrator
 *
 */
public class Utils {

    public static void main(String[] args) {
//        createXLS();
        readXLS();
    }

    // 创建表格
    public static void createXLS() {
        try {
            // 打开文件
            WritableWorkbook book = Workbook.createWorkbook(new File("test.xls"));
            // 生成名为“第一页”的工作表，参数0表示这是第一页
            WritableSheet sheet = book.createSheet("first page", 0);
            // 在Label对象的构造子中指名单元格位置是第一列第一行(0,0)单元格内容为test
            Label label = new Label(0, 0, "test");
            // 将定义好的单元格添加到工作表中
            sheet.addCell(label);
            // 生成一个保存数字的单元格,
            Number number = new Number(1, 0, 789);
            sheet.addCell(number);
            // 写入数据并关闭文件
            book.write();
            book.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // 读取Excel
    public static void readXLS() {
        try {
            Workbook book = Workbook.getWorkbook(new File("test.xls"));
            Sheet sheet = book.getSheet(0);
            Cell cell = sheet.getCell(0, 0);
            String result = cell.getContents();
            System.out.println(result);
            book.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // 修改Excel的类，添加一个工作表
    public static void updateXLS() {
        try {
            Workbook wb = Workbook.getWorkbook(new File("test.xls"));
            // 打开一个文件的副本，并且指定数据写回到原文件
            WritableWorkbook book = Workbook.createWorkbook(new File("test.xls"), wb);
            // 添加一个工作表
            WritableSheet sheet = book.createSheet("第二页", 1);
            sheet.addCell(new Label(0, 0, "第二页的测试数据"));
            book.write();
            book.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // 操作图片
    public static void addImage() throws Exception {
        WritableWorkbook wwb = Workbook.createWorkbook(new File("test.xls"));
        WritableSheet ws = wwb.createSheet("Test Sheet 1", 0);
        File file = new File("test.png");
        WritableImage image = new WritableImage(1, 4, 6, 18, file);
        ws.addImage(image);
        wwb.write();
        wwb.close();
    }

    // 单元格合并
    public static void mergeSheet(WritableWorkbook book, int sheetIndex, int x, int y, int x1, int y1) {
        WritableSheet sheet = book.getSheet(sheetIndex);
        try {
            sheet.mergeCells(x, y, x1, y1);
　　　　　　　// 合并第x列第x行到第x1列第y1行的所有单元格
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // 列宽行高设置
    public static void setColView(WritableSheet sheet, int colIndex, int rowIndex, int colW, int rowH) {
        try {
            // 将第colIndex列的宽度设为colW
            sheet.setColumnView(colIndex, colW);
            // 将第rowIndex行的高度设为rowH
            sheet.setRowView(rowIndex, rowH);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void setFont() {
        WritableWorkbook book;
        try {
            book = Workbook.createWorkbook(new File("test.xls"));
            WritableFont font1 = new WritableFont(WritableFont.TIMES, 16, WritableFont.BOLD);// 字体为TIMES，字号16，加粗显示
            WritableCellFormat format1 = new WritableCellFormat(font1);
　　　　　　　// 使用了WritableCellFormat类，这个类非常重要，通过它可以指定单元格的各种属性，后面的单元格格式化中会有更多描述
            Label label = new Label(0, 0, "data 4 test", format1);
　　　　　　　// 使用了Label类的构造子，指定了字串被赋予那种格式
            // 把水平对齐方式指定为居中
            format1.setAlignment(jxl.format.Alignment.CENTRE);
            // 把垂直对齐方式指定为居中
            format1.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
            // 设置自动换行
            format1.setWrap(true);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}