使用jxl工具包生成Excel以及读取Excel的方法

package com.yqcf.util;

import java.io.File;
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.List;
import java.util.ArrayList;
import jxl.Workbook;
import jxl.Sheet;
import jxl.Cell;
import jxl.CellType;
import jxl.write.Label;
import jxl.write.Number;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.VerticalAlignment;
import jxl.write.WritableCellFormat;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WritableFont;
import jxl.write.WriteException;
import jxl.read.biff.BiffException;

public class Excel {
/**
* @param dirPath:文件要保存的目录
* @param fileName:文件要保存的文件名
* @param sheetTitle:报表名称
* @param title:报表的题目
* @param columnTitle:列名集合（类型为List）
* @param text:正文数据（类型为两级嵌套List）
* return boolean
*/
public boolean writeExcel(String dirPath, String fileName,
String sheetTitle, String title, List columnTitle, List text) {
// ************判断参数是否合理**********************//
if (dirPath == null || "".equals(dirPath) || fileName == null
|| "".equals(fileName)) {
System.out.println("建立excel文件失败：路径或文件名为空");
return false;
}
File filePath = new File(dirPath);
{
if (!filePath.exists()) {
// 如果文件要保存的目录不存在则产生该目录
if (!filePath.mkdir()) {
System.out.println("建立excel文件失败：无法建立该目录");
return false;
}
}
}
// 在该目录下产生要保存的文件名
String excelPath = dirPath + "/" + fileName + ".xls";
File excelFile = new File(excelPath);
// 以下开始输出到EXCEL
WritableWorkbook workBook = null;
WritableSheet sheet = null;
try {
// *******************判断文件是否存在，否则产生该文件**********//
if (!excelFile.exists()) {
if (!excelFile.createNewFile()) {
System.out.println("建立excel文件失败：建立excel文件发生异常");
return false;
}
}
// ************创建工作簿*************//
workBook = Workbook.createWorkbook(excelFile);
// ************创建工作表*************//
if ("".equals(sheetTitle) || sheetTitle == null) {
sheet = workBook.createSheet("Sheet1", 0);
} else {
sheet = workBook.createSheet(sheetTitle, 0);
}
// **************设置单元格字体***************//
WritableFont headFont = new WritableFont(WritableFont.ARIAL, 14);
WritableFont normalFont = new WritableFont(WritableFont.ARIAL, 12);
// **************以下设置几种格式的单元格*************//
// 用于表头
WritableCellFormat wcf_head = new WritableCellFormat(headFont);
wcf_head.setBorder(Border.ALL, BorderLineStyle.THIN); // 线条
wcf_head.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
wcf_head.setAlignment(Alignment.CENTRE); // 文字水平对齐
wcf_head.setWrap(false); // 文字是否换行

// 用于正文居中
WritableCellFormat wcf_center = new WritableCellFormat(normalFont);
wcf_center.setBorder(Border.ALL, BorderLineStyle.THIN); // 线条
wcf_center.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
wcf_center.setAlignment(Alignment.CENTRE); // 文字水平对齐
wcf_center.setWrap(false); // 文字是否换行

// **************单元格格式设置完成*******************//

// *****************以下是报表的内容**********************//
// **************合并单元格设置excel的题目*************//
int x = 0;
if ("".equals(title) || title == null) {
title = "";
x = 0;
} else {
if (columnTitle != null && columnTitle.size() > 0) {
sheet.mergeCells(0, 0, columnTitle.size() - 1, 0);
sheet.addCell(new Label(0, 0, title, wcf_head));
x = 1;
} else if (text != null && text.size() > 0
&& ((List) text.get(0)).size() > 0) {
sheet.addCell(new Label(0, ((List) text.get(0)).size() - 1,
title, wcf_head));
x = 1;
} else {
sheet.addCell(new Label(0, 0, title, wcf_head));
x = 1;
}
}
// *********************设置excel的字段名******************//
if (columnTitle != null && columnTitle.size() > 0) {
for (int i = 0; i < columnTitle.size(); i++) {
sheet.addCell(new Label(i, x, String.valueOf(columnTitle
.get(i)), wcf_center));
}
x = x + 1;
}

// ****************写入正文数据**********************//
if (text != null && text.size() > 0) {
for (int i = 0; i < text.size(); i++) {
List content = (List) text.get(i);
if (content != null && content.size() > 0) {
for (int j = 0; j < content.size(); j++) {
String data = String.valueOf(content.get(j));
// ***************判断数据类型并添加数据**********//
if (content.get(j) instanceof String) {
sheet.addCell(new Label(j, x + i, data,
wcf_center));
} else if (content.get(j) instanceof Integer) {
Number numberLabel = new Number(j, x + i,
Integer.parseInt(data), wcf_center);
sheet.addCell(numberLabel);
} else if (content.get(j) instanceof Float) {
Number numberLabel = new Number(j, x + i, Float
.parseFloat(data), wcf_center);
sheet.addCell(numberLabel);
} else if (content.get(j) instanceof Double) {
Number numberLabel = new Number(j, x + i,
Double.parseDouble(data), wcf_center);
sheet.addCell(numberLabel);
} else if (content.get(j) instanceof Long) {
Number numberLabel = new Number(j, x + i, Long
.parseLong(data), wcf_center);
sheet.addCell(numberLabel);
} else if (content.get(j) instanceof Short) {
Number numberLabel = new Number(j, x + i, Short
.parseShort(data), wcf_center);
sheet.addCell(numberLabel);
} else if (content.get(j) instanceof Boolean) {
sheet.addCell(new Label(j, x + i, data,
wcf_center));
} else if (content.get(j) instanceof Byte) {
sheet.addCell(new Label(j, x + i, data,
wcf_center));
} else {
try {
Number numberLabel = new Number(j, x + i,
Double.parseDouble(data),
wcf_center);
sheet.addCell(numberLabel);
} catch (NumberFormatException ex) {
sheet.addCell(new Label(j, x + i, data,
wcf_center));
}
}
sheet.setColumnView(j, data.length() + 10);
}
}
}
}
// ************以上所写的内容都是写在缓存中的，下一句将缓存的内容写到文件中*********//
workBook.write();
return true;
} catch (WriteException e) {
System.out.println("建立excel文件失败：" + e.getMessage());
return false;
} catch (IOException e) {
System.out.println("建立excel文件失败：" + e.getMessage());
return false;
} finally {
// ***********关闭文件**************//
try {
if (workBook != null) {
workBook.close();
}
} catch (WriteException ex) {
System.out.println(ex.getMessage());
} catch (IOException ex) {
System.out.println(ex.getMessage());
}
}
}

/**
* @param excelFileName:excel文件的具体路径+文件名
* return List(类型为两级嵌套List)
*/
public List readExcel(String excelFileName) {
// *****************判断参数是否合理****************//
if (excelFileName == null || "".equals(excelFileName)) {
System.out.println("读取excel文件失败：路径或文件名为空");
return null;
}
File file = new File(excelFileName);
if (!file.exists()) {
System.out.println("读取excel文件失败：路径或文件名不存在");
return null;
}
List data = new ArrayList();
InputStream input = null;
Workbook workBook = null;
try {
// ****************产生文件流读取excel文件*************//
input = new FileInputStream(file);
workBook = Workbook.getWorkbook(input);
Sheet sheet = workBook.getSheet(0);
int columns = sheet.getColumns();
int rows = sheet.getRows();
for (int i = 0; i < rows; i++) {
List row = new ArrayList();
for (int j = 0; j < columns; j++) {
Cell cell = sheet.getCell(j, i);
String cellValue = cell.getContents();
// **************判断字段的数据类型***************//
if (cell.getType() == CellType.NUMBER) {
try {
Integer intCell = Integer.valueOf(cellValue);
row.add(intCell);
} catch (NumberFormatException ex) {
Double doubleCell = Double.valueOf(cellValue);
row.add(doubleCell);
}
} else {
row.add(cellValue);
}
}
data.add(row);
}
return data;
} catch (BiffException e) {
System.out.println("读取excel文件失败：" + e.getMessage());
return null;
} catch (IOException e) {
System.out.println("读取excel文件失败：" + e.getMessage());
return null;
} finally {
// ***********关闭流和工作簿**************//
if (workBook != null) {
workBook.close();
}
try {
if (input != null) {
input.close();
}
} catch (IOException ex) {
System.out.println(ex.getMessage());
}
}
}

}