package junit.test;import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.WritableImage;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;import org.apache.commons.lang3.math.NumberUtils;
import org.junit.Test;/*** Excel导入导出* * @author 林计钦* @version 1.0 Feb 7, 2014 4:14:51 PM*/
public class ExcelTest {/*** 导入(导入到内存)*/@Testpublic void importExcel() {Workbook book = null;try {book = Workbook.getWorkbook(new File("D:/test/测试.xls"));// 获得第一个工作表对象Sheet sheet = book.getSheet(0);int rows=sheet.getRows();int columns=sheet.getColumns();// 遍历每行每列的单元格for(int i=0;i<rows;i++){for(int j=0;j<columns;j++){Cell cell = sheet.getCell(j, i);String result = cell.getContents();if(j==0){System.out.print("姓名："+result+" ");}if(j==1){System.out.print("年龄："+result+" ");}if((j+1)%2==0){ System.out.println();}}}System.out.println("========");// 得到第一列第一行的单元格Cell cell1 = sheet.getCell(0, 0);String result = cell1.getContents();System.out.println(result);System.out.println("========");} catch (Exception e) {System.out.println(e);}finally{if(book!=null){book.close();}}}/*** 导出(导出到磁盘)*/@Testpublic void exportExcel() {WritableWorkbook book = null;try {// 打开文件book = Workbook.createWorkbook(new File("D:/test/测试.xls"));// 生成名为"学生"的工作表，参数0表示这是第一页WritableSheet sheet = book.createSheet("学生", 0);// 指定单元格位置是第一列第一行(0, 0)以及单元格内容为张三Label label = new Label(0, 0, "张三");// 将定义好的单元格添加到工作表中sheet.addCell(label);// 保存数字的单元格必须使用Number的完整包路径jxl.write.Number number = new jxl.write.Number(1, 0, 30);sheet.addCell(number);// 写入数据并关闭文件book.write();} catch (Exception e) {System.out.println(e);}finally{if(book!=null){try {book.close();} catch (Exception e) {e.printStackTrace();} }}}/*** 对象数据写入到Excel*/@Testpublic void writeExcel() {WritableWorkbook book = null;try {// 打开文件book = Workbook.createWorkbook(new File("D:/test/stu.xls"));// 生成名为"学生"的工作表，参数0表示这是第一页WritableSheet sheet = book.createSheet("学生", 0);List<Student> stuList=queryStudentList();if(stuList!=null && !stuList.isEmpty()){for(int i=0; i<stuList.size(); i++){sheet.addCell(new Label(0, i, stuList.get(i).getName()));sheet.addCell(new Number(1, i, stuList.get(i).getAge()));}}// 写入数据并关闭文件book.write();} catch (Exception e) {System.out.println(e);}finally{if(book!=null){try {book.close();} catch (Exception e) {e.printStackTrace();} }}}/*** 读取Excel数据到内存*/@Testpublic void readExcel() {Workbook book = null;try {// 打开文件book = Workbook.getWorkbook(new File("D:/test/stu.xls"));// 获得第一个工作表对象Sheet sheet = book.getSheet(0);int rows=sheet.getRows();int columns=sheet.getColumns();List<Student> stuList=new ArrayList<Student>();// 遍历每行每列的单元格for(int i=0;i<rows;i++){Student stu = new Student();for(int j=0;j<columns;j++){Cell cell = sheet.getCell(j, i);String result = cell.getContents();if(j==0){stu.setName(result);}if(j==1){stu.setAge(NumberUtils.toInt(result));}if((j+1)%2==0){stuList.add(stu);stu=null;}}}//遍历数据for(Student stu : stuList){System.out.println(String.format("姓名：%s, 年龄：%s", stu.getName(), stu.getAge()));}} catch (Exception e) {System.out.println(e);}finally{if(book!=null){try {book.close();} catch (Exception e) {e.printStackTrace();} }}}/*** 图片写入Excel，只支持png图片*/@Testpublic void writeImg() {WritableWorkbook wwb = null;try {wwb = Workbook.createWorkbook(new File("D:/test/image.xls"));WritableSheet ws = wwb.createSheet("图片", 0);File file = new File("D:\\test\\png.png");//前两位是起始格，后两位是图片占多少个格，并非是位置WritableImage image = new WritableImage(1, 4, 6, 18, file);ws.addImage(image);wwb.write();} catch (Exception e) {e.printStackTrace();}finally{if(wwb!=null){try {wwb.close();} catch (Exception e) {e.printStackTrace();}  }}}private List<Student> queryStudentList(){List<Student> stuList=new ArrayList<Student>();stuList.add(new Student("zhangsan", 20));stuList.add(new Student("lisi", 25));stuList.add(new Student("wangwu", 30));return stuList;}public class Student {private String name;private int age;public Student() {}public Student(String name, int age) {super();this.name = name;this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}
}

① WritableFont font1= new WritableFont(WritableFont.TIMES, 16, WritableFont.BOLD); 或//设置字体格式为excel支持的格式 WritableFont font3=new WritableFont(WritableFont.createFont("楷体 _GB2312"), 12, WritableFont.NO_BOLD);
② WritableCellFormat format1=new WritableCellFormat(font1);
③ Label label=new Label(0, 0, "data 4 test", format1);

//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);

WritableSheet sheet=book.createSheet("第一页", 0);
//合并第一列第一行到第六列第一行的所有单元格
//合并既可以是横向的，也可以是纵向的。合并后的单元格不能再次进行合并，否则会触发异常。
sheet.mergeCells(0, 0, 5, 0);

sheet.setRowView(0, 200);

sheet.setColumnView(0, 30);

    /*** 图片写入Excel，只支持png图片*/@Testpublic void writeImg() {WritableWorkbook wwb = null;try {wwb = Workbook.createWorkbook(new File("D:/test/image.xls"));WritableSheet ws = wwb.createSheet("图片", 0);File file = new File("D:\\test\\png.png");//前两位是起始格，后两位是图片占多少个格，并非是位置WritableImage image = new WritableImage(1, 4, 6, 18, file);ws.addImage(image);wwb.write();} catch (Exception e) {e.printStackTrace();}finally{if(wwb!=null){try {wwb.close();} catch (Exception e) {e.printStackTrace();}  }}}

fileName = new String(fileName.getBytes(),"iso-8859-1");
response.setCharacterEncoding("gb2312");
response.reset();
response.setContentType("application/OCTET-STREAM;charset=gb2312");
response.setHeader("pragma", "no-cache");
response.addHeader("Content-Disposition", "attachment;filename=\""
+ fileName + ".xls\"");// 点击导出excle按钮时候页面显示的默认名称
workbook = Workbook.createWorkbook(response.getOutputStream());