啥也不说了  直接上代码：

Student.java主要测试使用的

package cn.sup.cd.test;import java.util.Date;public class Student {	private int id;	private String name;	private String sex;	private int age;	private Date birth;	public Student() {	}	public Student(int id, String name, int age,String sex, Date birth) {		this.id = id;		this.name = name;		this.age = age;		this.sex = sex;		this.birth = birth;	}	public int getId() {		return id;	}	public void setId(int id) {		this.id = id;	}	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;	}	public Date getBirth() {		return birth;	}	public void setBirth(Date birth) {		this.birth = birth;	}	public String getSex() {		return sex;	}	public void setSex(String sex) {		this.sex = sex;	}}

 封装列名与属性名对应类:

package cn.sup.cd.common.util;public class ColnameToField {	private String colname;//列名		private String fieldName;//类属性名		public ColnameToField(String fieldName, String colname){		this.colname = colname;		this.fieldName = fieldName;	}	public String getColname() {		return colname;	}	public void setColname(String colname) {		this.colname = colname;	}	public String getFieldName() {		return fieldName;	}	public void setFieldName(String fieldName) {		this.fieldName = fieldName;	}	}

下面是单元测试代码：

 到时间可根据自己的情况定义

List
    
      students = null;	SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");	@Before	public void before() {		try {			Student student1 = new Student(1, "小李", 20, "男", df					.parse("1992-12-30"));			Student student2 = new Student(2, "小张", 24, "男", df					.parse("1945-02-30"));			Student student3 = new Student(3, "小孙", 25, "男", df					.parse("1988-11-20"));			Student student4 = new Student(4, "小王", 21, "男", df					.parse("1992-05-30"));			Student student5 = new Student(5, "小刘", 30, "男", df					.parse("2012-08-30"));			Student student6 = new Student(6, "小单", 28, "男", df					.parse("1992-12-30"));			Student student7 = new Student(7, "小红", 22, "男", df					.parse("1560-10-30"));			Student student8 = new Student(8, "小明", 29, "男", df					.parse("2001-07-30"));			students = new ArrayList
     
      ();			students.add(student1);			students.add(student2);			students.add(student3);			students.add(student4);			students.add(student5);			students.add(student6);			students.add(student7);			students.add(student8);		} catch (Exception e) {		}	}@Test	public void test2() throws FileNotFoundException {		// 获取xml数据存放位置		// String outputPath =		// ServletActionContext.getServletContext().getRealPath("/");		String title = "学生表";		String fileName = "学生表.xls";		String path = "d:\\aaaaa";		StudentExportExcel excel = new StudentExportExcel(students, path,				fileName, title);		excel.exportExcel();	}
     
    

下面是比较主要代码了.......... 主要按自己的业务封装一些导出文件的信息

package cn.sup.cd.common.exceExport;import java.util.ArrayList;import java.util.Collection;import java.util.List;import cn.sup.cd.common.util.ColnameToField;import cn.sup.cd.test.Student;@SuppressWarnings("serial")public class StudentExportExcel extends ExportExcel
    
      {	/**	 * 	 * @param dataset数据源	 * @param path	 *            导出路径	 * @param fileName	 *            导出文件名称	 * @param title	 *            文件标题	 */	public StudentExportExcel(Collection
     
       dataset, String path,			String fileName, String title) {		super(dataset, path);		/* 设置Excel基本数据 */		// 定义列名与类属性名的对应关系		//		List
      
        colNameToField = new ArrayList
       
        () {			{				add(new ColnameToField("id", "学号"));				add(new ColnameToField("name", "姓名"));				add(new ColnameToField("age", "年龄"));				add(new ColnameToField("sex", "性别"));				add(new ColnameToField("birth", "出生日期"));			}		};		super.setTitle(title);// 标题，以查询的起止日期作为标题		super.setFileName(fileName);// Excel文件名(以站点名作为文件名)		super.setDateFormat("yyyy-MM-dd HH:mm:ss");		// 设置列名对应的属性名集合(其顺序与表头列名属性一致)		super.setColNameToField(colNameToField);	}}
       
      
     
    

最核心代码如下所示：。

package cn.sup.cd.common.exceExport;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.lang.reflect.ParameterizedType;import java.lang.reflect.Type;import java.text.SimpleDateFormat;import java.util.Collection;import java.util.Date;import java.util.Iterator;import java.util.List;import java.util.Map;import java.util.regex.Matcher;import java.util.regex.Pattern;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFCellStyle;import org.apache.poi.hssf.usermodel.HSSFClientAnchor;import org.apache.poi.hssf.usermodel.HSSFComment;import org.apache.poi.hssf.usermodel.HSSFFont;import org.apache.poi.hssf.usermodel.HSSFPatriarch;import org.apache.poi.hssf.usermodel.HSSFRichTextString;import org.apache.poi.hssf.usermodel.HSSFRow;import org.apache.poi.hssf.usermodel.HSSFSheet;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.hssf.util.HSSFColor;import cn.sup.cd.common.util.ColnameToField;/** * 利用开源组件POI3.0.2动态导出EXCEL文档 转载时请保留以下信息，注明出处！ *  * @author TL * @version v1.0 * @param 
    
      *            应用泛型，代表任意一个符合javabean风格的类 *            注意这里为了简单起见，boolean型的属性xxx的get器方式为getXxx(),而不是isXxx() *            byte[]表jpg格式的图片数据 */public class ExportExcel
     
       {	/**	 * xls文件存放路径	 */	public static final String EXCEL_FILE_PATH = "xls";	/**	 * xls数据映射类	 */	private Class
      
        classType;	private Collection
       
         dataset;	private String fileName;// 文件名	private String title;// 文档标题	private String dateFormat = "yyyy-MM-dd";// 默认日期格式	private String path;// 项目运行物理路径	private List
        
          colNameToField;// 列名与类属性名的对应关系	private Map
         
          > colValueToChange;// 将列值转换为另外的值 /** * 构造方法，初始化数据 * * @param dataset * 数据集合 * @param path * Tomcat项目运行路径 */ @SuppressWarnings("unchecked") public ExportExcel(Collection
          
            dataset, String path) { try { // 获取泛型的实际类型 Type type = this.getClass().getGenericSuperclass(); if (type instanceof ParameterizedType) { // 转换成泛型类 ParameterizedType pType = (ParameterizedType) type; this.classType = (Class
           
            ) pType.getActualTypeArguments()[0]; } this.path = path; this.dataset = dataset; } catch (Exception e) { e.printStackTrace(); } } /** * 生成Excel文件 */ public void exportExcel() { File file = new File(path + fileName); if (!file.exists()) { try { file.createNewFile(); } catch (IOException e) { e.printStackTrace(); } } // 获取文件输出流 OutputStream out = null; try { out = new FileOutputStream(path + fileName); } catch (FileNotFoundException e) { e.printStackTrace(); return; } // 设置表格标题行的列名数组并生成Excel String[] header = new String[colNameToField.size()]; int index = 0; for (ColnameToField colField : colNameToField) { header[index] = colField.getColname(); index++; } //导出 exportExcel(title, header, out, dateFormat); } /** * 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上 * * @param title * 表格标题名 * @param headers * 表格属性列名数组 * @param out * 与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中 * @param pattern * 如果有时间数据，设定输出格式。默认为"yyy-MM-dd" */ @SuppressWarnings("unused") private void exportExcel(String title, String[] headers, OutputStream out, String pattern) { // 声明一个工作薄 HSSFWorkbook workbook = new HSSFWorkbook(); // 生成一个表格 HSSFSheet sheet = workbook.createSheet(title); // 设置表格默认列宽度为15个字节 sheet.setDefaultColumnWidth((short) 15); // 生成一个样式 HSSFCellStyle style = workbook.createCellStyle(); // 设置这些样式 style.setFillForegroundColor(HSSFColor.SKY_BLUE.index); style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); style.setBorderBottom(HSSFCellStyle.BORDER_THIN); style.setBorderLeft(HSSFCellStyle.BORDER_THIN); style.setBorderRight(HSSFCellStyle.BORDER_THIN); style.setBorderTop(HSSFCellStyle.BORDER_THIN); style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 生成一个字体 HSSFFont font = workbook.createFont(); font.setColor(HSSFColor.VIOLET.index); font.setFontHeightInPoints((short) 12); font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); // 把字体应用到当前的样式 style.setFont(font); // 生成并设置另一个样式 HSSFCellStyle style2 = workbook.createCellStyle(); style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index); style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); style2.setBorderBottom(HSSFCellStyle.BORDER_THIN); style2.setBorderLeft(HSSFCellStyle.BORDER_THIN); style2.setBorderRight(HSSFCellStyle.BORDER_THIN); style2.setBorderTop(HSSFCellStyle.BORDER_THIN); style2.setAlignment(HSSFCellStyle.ALIGN_CENTER); style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); // 生成另一个字体 HSSFFont font2 = workbook.createFont(); font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL); // 把字体应用到当前的样式 style2.setFont(font2); // 声明一个画图的顶级管理器 HSSFPatriarch patriarch = sheet.createDrawingPatriarch(); // 定义注释的大小和位置,详见文档 HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5)); // 设置注释内容 comment.setString(new HSSFRichTextString("可以在POI中添加注释！")); // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容. comment.setAuthor("leno"); // 产生表格标题行 HSSFRow row = sheet.createRow(0); for (short i = 0; i < headers.length; i++) { HSSFCell cell = row.createCell(i); cell.setCellStyle(style); HSSFRichTextString text = new HSSFRichTextString(headers[i]); cell.setCellValue(text); } // 遍历集合数据，产生数据行 Iterator
            
              it = dataset.iterator(); int index = 0; while (it.hasNext()) { index++; row = sheet.createRow(index); T t = (T) it.next();// 取出每个对象 // 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值 short cellIndex = 0;// Excel列索引 for (ColnameToField colField : colNameToField) { String fieldName = colField.getFieldName();// 取属性名 HSSFCell cell = row.createCell(cellIndex); cell.setCellStyle(style2); String getMethodName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1); try { // Class tCls = classType.getClass(); Method getMethod = classType.getMethod(getMethodName, new Class[] {}); Object value = getMethod.invoke(t, new Object[] {}); // 判断值的类型后进行强制类型转换 String textValue = null; // if (value instanceof Integer) { // int intValue = (Integer) value; // cell.setCellValue(intValue); // } else if (value instanceof Float) { // float fValue = (Float) value; // textValue = new HSSFRichTextString( // String.valueOf(fValue)); // cell.setCellValue(textValue); // } else if (value instanceof Double) { // double dValue = (Double) value; // textValue = new HSSFRichTextString( // String.valueOf(dValue)); // cell.setCellValue(textValue); // } else if (value instanceof Long) { // long longValue = (Long) value; // cell.setCellValue(longValue); // } if (value == null) { textValue = ""; } else if (value instanceof Boolean) { /* * boolean bValue = (Boolean) value; textValue = "男"; if * (!bValue) { textValue = "女"; } */ } else if (value instanceof Date) { Date date = (Date) value; SimpleDateFormat sdf = new SimpleDateFormat(pattern); textValue = sdf.format(date); } else if (value instanceof byte[]) { // 有图片时，设置行高为60px; row.setHeightInPoints(60); // 设置图片所在列宽度为80px,注意这里单位的一个换算 sheet.setColumnWidth(cellIndex, (short) (35.7 * 80)); // sheet.autoSizeColumn(i); byte[] bsValue = (byte[]) value; HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255, (short) 6, index, (short) 6, index); anchor.setAnchorType(2); patriarch.createPicture(anchor, workbook.addPicture( bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG)); } else { // 其它数据类型都当作字符串简单处理 textValue = value.toString(); // 判断属性值是否需要转换为其他的内容 if (this.colValueToChange != null) { // 取出属性值转换Map Map
             
               changeMap = colValueToChange .get(fieldName); if (changeMap != null && changeMap.size() > 0) { textValue = changeMap.get(textValue); } } } // 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成 if (textValue != null) { Pattern p = Pattern.compile("^//d+(//.//d+)?$"); Matcher matcher = p.matcher(textValue); if (matcher.matches()) { // 是数字当作double处理 cell.setCellValue(Double.parseDouble(textValue)); } else { HSSFRichTextString richString = new HSSFRichTextString( textValue); HSSFFont font3 = workbook.createFont(); font3.setColor(HSSFColor.BLUE.index); richString.applyFont(font3); cell.setCellValue(richString); } } } catch (SecurityException e) { e.printStackTrace(); } catch (NoSuchMethodException e) { e.printStackTrace(); } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } finally { // 清理资源 cellIndex++; } } } try { workbook.write(out); } catch (IOException e) { e.printStackTrace(); } finally { if (out != null) { try { out.close(); } catch (IOException e) { e.printStackTrace(); } } } } /** * 设置日期格式 * * @param dateFormat */ public void setDateFormat(String dateFormat) { this.dateFormat = dateFormat; } public void setFileName(String fileName) { this.fileName = fileName; } public void setTitle(String title) { this.title = title; } public void setColNameToField(List
              
                colNameToField) { this.colNameToField = colNameToField; } public void setColValueToChange( Map
               
                > colValueToChange) { this.colValueToChange = colValueToChange; }}
               
              
             
            
           
          
         
        
       
      
     
    

效果图：