jxl处理excel简单封装

jxl 处理excel文件，简单封装。有高见的请见教

需 1、 jxl.jar包

    2、自己写的CommonUtil文件

 

 

代码如下：

  

package zhl.file_util;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import jxl.Cell;
import jxl.CellType;
import jxl.Sheet;
import jxl.Workbook;
import jxl.WorkbookSettings;
import jxl.biff.EmptyCell;
import jxl.format.Alignment;
import jxl.format.CellFormat;
import jxl.format.VerticalAlignment;
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.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;

/**
 * 2010-11-09 JXL操作Excel公共类
 * 
 * 1、导出excel：数据为：list-ObjectBean，每个list为一行，ObjectBean需有get方法
 * 2、读取excel：读入JVM的数据为：list<Object>；实体bean需有set方法，且属性顺序与excel中行一致
 * @author zhl
 *
 */

public class ExcelUtil {
	
	private final static String EXCEL_DATE_FORMAT = "EXCEL_DATE_FORMAT";
	private final static String EXCEL_TITLE_FORMAT = "EXCEL_TITLE_FORMAT";
	
	private WritableWorkbook workbook;  //用来创建excel文件
	private WritableSheet sheet;        //工作表 
	@SuppressWarnings("unchecked")
	private Map format ;			    //存放显示风格

	@SuppressWarnings("unchecked")
	public ExcelUtil(){
		format =  new HashMap();				    
		format.put(EXCEL_DATE_FORMAT, "yyyy-MM-dd hh:mm:ss"); // 时间显示格式
		format.put(CellType.BOOLEAN, this.getDataCellFormat(CellType.BOOLEAN));
		format.put(CellType.NUMBER, this.getDataCellFormat(CellType.NUMBER));
		format.put(CellType.DATE, this.getDataCellFormat(CellType.DATE));
		format.put(CellType.STRING_FORMULA, this.getDataCellFormat(CellType.STRING_FORMULA));
		format.put(EXCEL_TITLE_FORMAT, this.getTitleCellFormat());
	}
	
	/**
	 * 初始化表格属性
	 * 
	 * @param sheet
	 */
	public void initialSheetSetting(WritableSheet sheet) {
		try {
			sheet.getSettings().setDefaultColumnWidth(15); // 设置列的默认宽度
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 插入公式
	 * 
	 * @param sheet
	 * @param col
	 * @param row
	 * @param formula
	 * @param format
	 */
	public void insertFormula(WritableSheet sheet, Integer col, Integer row,
			String formula, WritableCellFormat format) {
		try {
			Formula f = new Formula(col, row, formula, format);
			sheet.addCell(f);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 插入一行数据
	 * 
	 * @param sheet        工作表
	 * @param row          行号
	 * @param data         内容   内容类型必须为String
	 * @param format       风格
	 */
	public void insertRowData(WritableSheet sheet, Integer row, List<String> data,
			WritableCellFormat format) {
		try {
			Label label;
			for (int i = 0; i < data.size(); i++) {
				label = new Label(i, row, (String) data.get(i), format);
				sheet.addCell(label);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	/**
	 * 插入一行数据
	 * 
	 * @param sheet        工作表
	 * @param row          行号
	 * @param data         内容
	 */
	public void insertRowData(WritableSheet sheet, Integer row, Object data) {
		try {
			//取实体的属性
			Field fields[] = data.getClass().getDeclaredFields(); 
			if(fields!=null&&fields.length>0){
				int k = fields.length;
				for (int i=0;i<k;i++) {
					//取属性的具体值
					Object o = CommonTools.getPropertyValue(data, fields[i].getName());
					//取属性的类型
					String typeName = fields[i].getType().getSimpleName();
					WritableCell cell = this.getWritableCell(i, row, o,typeName);
					//添加到表格上
					sheet.addCell(cell);
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	/**
	 * 根据不同的属性类型，返回相应的WritableCell
	 * 
	 * @param col           列号
	 * @param row           行号
	 * @param data          内容
	 * @param typeName      类型
	 * @return              与类型一致的cell
	 */
	private WritableCell getWritableCell(Integer col,Integer row,Object data,String typeName){
		WritableCell result = null;
		if (data != null) {
			if ("int".equals(typeName) || "Interger".equals(typeName)
					|| "double".equals(typeName) || "Double".equals(typeName)
					|| "long".equals(typeName) || "Long".equals(typeName)
					|| "float".equals(typeName) || "Float".equals(typeName)) {
				result = new Number(col, row, (Integer) data, (CellFormat) format.get(CellType.NUMBER));
			} else if ("boolean".equals(typeName) || "Boolean".equals(typeName)) {
				result = new jxl.write.Boolean(col, row, (Boolean) data, (CellFormat) format.get(CellType.BOOLEAN));
			} else if ("Date".equals(typeName)) {
				result = new jxl.write.DateTime(col, row, (Date) data, (CellFormat) format.get(CellType.DATE));
			} else {
				result = new Label(col, row, data.toString(),  (CellFormat) format.get(CellType.STRING_FORMULA));
			}
		} else {
			result = new EmptyCell(col,row);
		}
		return result;
	}
	
	/**
	 * 插入单元格数据
	 * 
	 * @param sheet
	 * @param col
	 * @param row
	 * @param data
	 */
	public void insertOneCellData(WritableSheet sheet, Integer col,
			Integer row, Object data, WritableCellFormat format) {

		try {
			if (data instanceof Double) {
				jxl.write.Number labelNF = new jxl.write.Number(col, row,
						(Double) data, format);
				sheet.addCell(labelNF);
			} else if (data instanceof java.lang.Boolean) {

				jxl.write.Boolean labelB = new jxl.write.Boolean(col, row,
						(java.lang.Boolean) data, format);
				sheet.addCell(labelB);
			} else if (data instanceof Date) {
				jxl.write.DateTime labelDT = new jxl.write.DateTime(col, row,
						(Date) data, format);
				sheet.addCell(labelDT);
				setCellComments(labelDT, "这是个创建表的日期说明！"); // 给单元格加注释(公共方法)
			} else {
				Label label = new Label(col, row, data.toString(), format);
				sheet.addCell(label);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 合并单元格，并插入数据
	 * 
	 * @param sheet
	 * @param col_start
	 * @param row_start
	 * @param col_end
	 * @param row_end
	 * @param data
	 * @param format
	 */
	public void mergeCellsAndInsertData(WritableSheet sheet, Integer col_start,
			Integer row_start, Integer col_end, Integer row_end, Object data,
			WritableCellFormat format) {
		try {
			sheet.mergeCells(col_start, row_start, col_end, row_end);// 左上角到右下角
			insertOneCellData(sheet, col_start, row_start, data, format);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 给单元格加注释
	 * 
	 * @param label      对象
	 * @param comments   注释内容
	 */
	public void setCellComments(Object label, String comments) {
		WritableCellFeatures cellFeatures = new WritableCellFeatures();
		cellFeatures.setComment(comments);
		if (label instanceof jxl.write.Number) {
			jxl.write.Number num = (jxl.write.Number) label;
			num.setCellFeatures(cellFeatures);
		} else if (label instanceof jxl.write.Boolean) {
			jxl.write.Boolean bool = (jxl.write.Boolean) label;
			bool.setCellFeatures(cellFeatures);
		} else if (label instanceof jxl.write.DateTime) {
			jxl.write.DateTime dt = (jxl.write.DateTime) label;
			dt.setCellFeatures(cellFeatures);
		} else {
			Label _label = (Label) label;
			_label.setCellFeatures(cellFeatures);
		}
	}

	/**
	 * 读取Excel文件，把数据放到list中
	 * 
	 * @param inputFile                 要读取的excel文件
	 * @param inputFileSheetIndex       读第几个工作表
	 * @param rowNum					从第几行数据开始
	 * @param bean                      以那个Bean读取
	 * @return							返回一个List，list中放Class对象	
	 */
	@SuppressWarnings("unchecked")
	public List<Object> readDataFromExcel(InputStream inputFile,int inputFileSheetIndex,int rowNum,Class bean) {

		List<Object> list = new ArrayList<Object>();
		Workbook book = null;
		Cell cell = null;
		WorkbookSettings setting = new WorkbookSettings();
//		java.util.Locale locale = new java.util.Locale("zh", "CN"); // 本地
//		setting.setLocale(locale);
//		setting.setEncoding("ISO-8859-1"); // 设置字符集编码

		try {
			book = Workbook.getWorkbook(inputFile, setting);
		} catch (Exception e) {
			e.printStackTrace();
		}

		try {
			Object tmpObject = null;
			Sheet sheet = book.getSheet(inputFileSheetIndex);
			for (int rowIndex = rowNum; rowIndex < sheet.getRows(); rowIndex++) {// 行
				//实例一个bean
				tmpObject = bean.newInstance();
				//bean的属性，注意：bean中的属性顺序应该与表格中的属性一致。
				Field[] fields = bean.getDeclaredFields();
				for (int colIndex = 0; colIndex < sheet.getColumns(); colIndex++) {// 列
					cell = sheet.getCell(colIndex, rowIndex);
					//给tmpObject设置属性值
					CommonTools.setProperty(tmpObject, fields[colIndex].getName(), getParameter(fields[colIndex],cell.getContents()));
				}
				//把tmpObject添加到list中
				list.add(tmpObject);
			}
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
		book.close();
		return list;
	}

	/**
	 * 把字符串转换成相应的类型的对象
	 * 
	 * @param field         属性
	 * @param msg           值
	 * @return              字符串转换成与属性类型一致的对象
	 */
	@SuppressWarnings("deprecation")
	private Object getParameter(Field field,String msg){
		Object result = null;
		
		try {
			String typeName = field.getType().getSimpleName();
			if ("int".equals(typeName) || "Integer".equals(typeName)) {
				if(msg.indexOf(".")>0){
					msg = msg.substring(0,msg.indexOf("."));
				}
				result = Integer.parseInt(msg);
			} else if ("double".equals(typeName) || "Double".equals(typeName)) {
				result = Double.parseDouble(msg);
			} else if ("boolean".equals(typeName) || "Boolean".equals(typeName)) {
				result = Boolean.parseBoolean(msg);
			} else if ("Date".equals(typeName)) {
				DateFormat dateFormat = new SimpleDateFormat((String)format.get(ExcelUtil.EXCEL_DATE_FORMAT));
				result = dateFormat.parse(msg);
			} else {
				result = msg;
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return result;
	}
	
	/**
	 * 得到数据表头格式
	 * 
	 * @return
	 */
	public WritableCellFormat getTitleCellFormat() {
		WritableCellFormat wcf = null;
		try {
			// 字体样式(字体,大小,是否粗体,是否斜体)
			WritableFont wf = new WritableFont(WritableFont.TIMES, 11,
					WritableFont.BOLD, false);
			wcf = new WritableCellFormat(wf);// 实例化文字格式化
			// 对齐方式
			wcf.setAlignment(Alignment.CENTRE); // 水平
			wcf.setVerticalAlignment(VerticalAlignment.CENTRE); // 垂直
		} catch (WriteException e) {
			e.printStackTrace();
		}
		return wcf;
	}

	/**
	 * 得到数据格式(默认左对齐)
	 * 
	 * @return
	 */
	public WritableCellFormat getDataCellFormat(CellType type) {
		WritableCellFormat wcf = null;
		try {
			// 字体样式
			if (type == CellType.NUMBER || type == CellType.NUMBER_FORMULA) {// 数字
				NumberFormat nf = new NumberFormat("#.00"); // 保留小数点后两位
				wcf = new WritableCellFormat(nf);
			} else if (type == CellType.DATE || type == CellType.DATE_FORMULA) {// 日期
				jxl.write.DateFormat df = new jxl.write.DateFormat((String) format.get(EXCEL_DATE_FORMAT)); // 时间显示格式
				wcf = new jxl.write.WritableCellFormat(df);
			} else {
				WritableFont wf = new WritableFont(WritableFont.TIMES, 11,
						WritableFont.NO_BOLD, false);// 字体样式(字体,大小,是否粗体,是否斜体)
				wcf = new WritableCellFormat(wf);
			}
			// 对齐方式
			wcf.setAlignment(Alignment.LEFT);
			wcf.setVerticalAlignment(VerticalAlignment.CENTRE);

			wcf.setWrap(false);// 自动换行
		} catch (WriteException e) {
			e.printStackTrace();
		}

		return wcf;
	}

	/**
	 * 得到数据格式(重载)  可以设置水平对齐模式
	 * @param type
	 * @param align      设置水平对齐模式
	 * @return
	 */
	public WritableCellFormat getDataCellFormat(CellType type, Alignment align) {
		WritableCellFormat wcf = null;
		try {
			// 字体样式
			if (type == CellType.NUMBER || type == CellType.NUMBER_FORMULA) {// 数字
				NumberFormat nf = new NumberFormat("#.00"); // 保留小数点后两位
				wcf = new WritableCellFormat(nf);
			} else if (type == CellType.DATE || type == CellType.DATE_FORMULA) {// 日期
				jxl.write.DateFormat df = new jxl.write.DateFormat(
						(String)format.get(CellType.DATE)); // 时间显示格式
				wcf = new jxl.write.WritableCellFormat(df);
			} else {
				WritableFont wf = new WritableFont(WritableFont.TIMES, 12,
						WritableFont.NO_BOLD, false);// 字体样式(字体,大小,是否粗体,是否斜体)
				wcf = new WritableCellFormat(wf);
			}
			// 对齐方式
			wcf.setAlignment(align);
			wcf.setVerticalAlignment(VerticalAlignment.CENTRE);

			wcf.setWrap(true);// 自动换行
		} catch (WriteException e) {
			e.printStackTrace();
		}

		return wcf;
	}

	/**
	 * 创建目录
	 * 
	 * @param destDirName       目录路径
	 */
	public static void createDir(String destDirName) {
		File dir = new File(destDirName);
		// 如果目录不存在则创建目录
		if (!dir.exists()) {
			if (!destDirName.endsWith(File.separator))
				destDirName = destDirName + File.separator;
			// 创建单个目录
			if (dir.mkdirs()) {
				System.out.println("创建目录" + destDirName + "成功！");
			} else {
				System.out.println("创建目录" + destDirName + "成功！");
			}
		}

	}

	/**
	 * 生成并关闭工作簿
	 */
	public void writeAndClose() {
		try {
			workbook.write();
			workbook.close();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (WriteException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 生成Excel文件(适合一个标题,剩余全是数据)
	 * 
	 * @param os           创建excel的流
	 * @param sheetName    工作表名称
	 * @param dataTitles   数据标题
	 * @param datas        数据--list中放行的内容，用list
	 */
	public void createExcelFile(OutputStream os, String sheetName, List<String> dataTitles,
			List<Object> datas) {

		try {

			//OutputStream os = new FileOutputStream(path);// 输出流指定文件路径
			workbook = Workbook.createWorkbook(os);// 创建工作薄
			sheet = workbook.createSheet(sheetName, 0); // 添加第一个工作表
			initialSheetSetting(sheet);// 初始化表格属性(公共方法)

			// 添加数据标题
			insertRowData(sheet, 0, dataTitles, getTitleCellFormat());

			// 插入一行 (公共方法)
			for (int i = 0; i < datas.size(); i++) {
				Object data = datas.get(i);
				insertRowData(sheet, i + 1, data);
			}

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

		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 设置表格显示风格
	 * 
	 * @param cellType         用来设置表头显示风格，需为：EXCEL_TITLE_FORMAT或日期显示格式
	 * @param cellFormat       自己定义WritableCellFormat显示风格
	 */
	@SuppressWarnings("unchecked")
	public void setCellFormat(String cellType,WritableCellFormat cellFormat){
		if(this.format!=null&&cellFormat!=null){
			try {
				if(format.get(cellType)==null){
					throw new Exception();
				}else {
					format.remove(cellType);
					format.put(cellType, cellFormat);
				}
			} catch (Exception e) {
				System.out.println("风格设置不正确。key应为：CellType或ExcelUtil的静态属性");
			}
		}
	}

	/**
	 * 设置显示风格
	 * 
	 * @param cellType             用来设置不同数据类型的显示格式，为CellType
	 * @param cellFormat           自己定义WritableCellFormat显示风格
	 */
	@SuppressWarnings("unchecked")
	public void setCellFormat(CellType cellType,WritableCellFormat cellFormat){
		if(this.format!=null&&cellFormat!=null){
			try {
				if(format.get(cellType)==null){
					throw new Exception();
				}else {
					format.remove(cellType);
					format.put(cellType, cellFormat);
				}
			} catch (Exception e) {
				System.out.println("风格设置不正确。key应为：CellType或ExcelUtil的静态属性");
			}
		}
	}
	
	// // 测试
	// public static void main(String[] args) {
	//
	// ExcelUtil jxl = new ExcelUtil(); // 创建目录
	// ExcelUtil.createDir("C:/ExcelTEMP/"); // 文件路径
	// String filePath = "C:/ExcelTEMP/test.xls";
	//
	// List<Object> lists = new ArrayList<Object>();
	// for (int i = 0; i < 20; i++) {
	// Bean bean = new Bean();
	// bean.setId(i + 1);
	// bean.setUsername("adsf**" + i + "***");
	// if (i % 2 == 0) {
	// bean.setFlag(true);
	// bean.setSex("女");
	// } else {
	// bean.setFlag(false);
	// bean.setSex("男");
	// }
	// bean.setCreateTime(new Date());
	//
	// lists.add(bean);
	// }
	//
	// List<String> title = new ArrayList<String>();
	// title.add("编号");
	// title.add("姓名");
	// title.add("性别");
	// title.add("创建日期");
	// title.add("正常否");
	//
	// jxl.createExcelFile(new FileOutputStream(filePath), "成绩单", title, lists);
	// // 读excel文件
	// List<Object> list = jxl.readDataFromExcel(new FileInputSteam(
	// "c:/ExcelTEMP/test.xls"), 0, 1, Bean.class);
	// for (int i = 0; i < list.size(); i++) {
	// CommonTools.print(list.get(i));
	//	}
	//	}
}

 

CommonUtil.java

package zhl.file_util;

import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
 * 2010-11-09  取、设实体对象的各属性值
 * @author zhl
 *
 */
public class CommonTools {
	
	/**
	 * 读取实体bean属性值
	 * 
	 * @param bean            实体对象
	 * @param propertyName    要取的属性值
	 * @return                返回实体对象的属性值
	 */
	@SuppressWarnings("finally")
	public static Object getPropertyValue(Object bean, String propertyName) {
		Object result = null;
		PropertyDescriptor pd;
		try {
			pd = new PropertyDescriptor(propertyName, bean.getClass());
			Method m = pd.getReadMethod();
			result = m.invoke(bean);
		} finally {
			return result;
		}
	}
	/**
	 * 设置实体bean的属性值
	 * 
	 * @param bean                 实体对象
	 * @param propertyName         要设置的属性
	 * @param value                属性值
	 */
	public static void setProperty(Object bean, String propertyName,Object value) {
		PropertyDescriptor pd;
		try {
			pd = new PropertyDescriptor(propertyName, bean.getClass());
			Method m = pd.getWriteMethod();
			// 设置属性值
			m.invoke(bean, value);
		} catch (IntrospectionException e) {
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		}
	}
	
	public static void print(Object bean){
		Field[] fields = bean.getClass().getDeclaredFields();
		
		for (int i = 0; i < fields.length; i++) {
			System.out.print(fields[i].getName()+"："+CommonTools.getPropertyValue(bean, fields[i].getName())+" | ");
		}
		System.out.println();
	}
	
	/*
	 * 
	
	// 测试
	public static void main(String[] args) {
		
		Bean bean = new Bean();
		
		Field[] fieldss = bean.getClass().getDeclaredFields();
		CommonTools.setProperty(bean, fieldss[4].getName(), true);
		CommonTools.setProperty(bean, "createTime", new Date());
		
		System.out.println(bean.getCreateTime());
		System.out.println(bean.isFlag());
		
		
		
		// Bean bean = new Bean();
		// bean.setId(100);
		// bean.setUsername("test");
		// bean.setSex("m");
		// bean.setCreateTime(new Date());
		// bean.setFlag(false);
		//		
		 Field fields[] = bean.getClass().getDeclaredFields();
		for (Field field : fields) {
			Object tmpObject = getPropertyValue(bean, field.getName());
				System.out.println(tmpObject);
		}
	}
	 */
}

 

Bean.java随意的一个bean

package zhl.file_util;

import java.util.Date;

public class Bean {
	private int id;
	private String username;
	private String sex;
	private Date createTime;
	private boolean flag;

	public boolean isFlag() {
		return flag;
	}

	public void setFlag(boolean flag) {
		this.flag = flag;
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	public Date getCreateTime() {
		return createTime;
	}

	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}
}