java 导出 Excel

工具类：

package com.hcoa.util;

import java.io.File;

import java.lang.reflect.Method;

import java.util.List;
import java.util.Map;
import java.util.Set;

import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

/**
 * @author 陆仁聪 E-mail:[email protected]
 * @file ExcelUtil.java
 * @version 创建时间：Sep 4, 2009 3:09:08 PM
 * @desc （excel操作工具类）
 */
public class ExcelUtil<E> {
	/**
	 * 
	 * @param list要导入到excel的数据集合
	 * @param file
	 *            excel文件
	 * @param type数据的类型
	 * @param attrubutes要导出的属性
	 * @param head表格头部信息
	 *            实例如下 String[] attrubutes = { "users.number", "users.name",
	 *            "averageScore", "coursePoint", "awardScore", "sportPoint" };
	 *            String[] head = { "序号", "学号", "姓名", "绩点", "学习成绩分", "学习成绩加分",
	 *            "体育成绩分" }; ExcelUtil<PointSumScore> excelUtil = new ExcelUtil<PointSumScore>();
	 *            excelUtil.createExcel(pointSumScoreList, file,
	 *            PointSumScore.class, attrubutes, head);
	 * 
	 */
	@SuppressWarnings("deprecation")
	public void createExcel(List<E> list, File file, Class<E> type,
			String[] attrubutes, String[] head,
			Map<String, Map<Integer, String>>... keyvalueMap) {
		WritableWorkbook wwb = null;
		try {
			file.createNewFile();
			wwb = Workbook.createWorkbook(file);
			WritableSheet ws = wwb.createSheet("sheet1", 0);
			// 下面开始添加单元格
			Label labelC = null;
			for (int j = 0; j < head.length; j++) {
				labelC = new Label(j, 0, head[j]);
				ws.addCell(labelC);
			}
			for (int i = 0; i < list.size(); i++) {
				labelC = new Label(0, i + 1, Integer.toString(i + 1));// 序号
				ws.addCell(labelC);
				for (int j = 0; j < attrubutes.length; j++) {
					Object returnvalue = returnVelue(
							returnGetMethod(attrubutes[j]), list.get(i), 0,
							keyvalueMap);
					if (returnvalue == null) {
						labelC = new Label(j + 1, i + 1, "0");
					} else
						labelC = new Label(j + 1, i + 1, returnvalue.toString());
					ws.addCell(labelC);
				}
			}
			wwb.write();
			wwb.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private Object returnVelue(String[] getMethod, Object o, int i,
			Map<String, Map<Integer, String>>... keyvalueMap) {
		Object returnValue = null;
		if (o != null) {
			Method[] methods = o.getClass().getMethods();
			try {
				for (Method m : methods) {
					if (m.getName().equals(getMethod[i])) {
						returnValue = m.invoke(o);
						i += 1;
						if (i < getMethod.length) {
							returnValue = returnVelue(getMethod, returnValue, i);
						} else {
							if (keyvalueMap != null) {
								for (Map<String, Map<Integer, String>> map : keyvalueMap) {
									Set<String> attr = map.keySet();
									Map<Integer, String> kv;
									for (String a : attr) {
										if (a.equals(m.getName())) {
											kv = map.get(a);
											if (returnValue == null
													|| returnValue.equals(""))
												returnValue = "未知";
											else
												returnValue = kv
														.get(returnValue);
										}
									}
								}
							}
							return returnValue;
						}
						break;
					}
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return returnValue;
	}

	private String[] returnGetMethod(String attrubutes) {
		String[] attrubutesArray = attrubutes.split("\\.");
		String[] returns = new String[attrubutesArray.length];
		for (int i = 0; i < attrubutesArray.length; i++) {
			Character f = attrubutesArray[i].charAt(0);
			String a = f.toString().toUpperCase();
			returns[i] = "get" + a + attrubutesArray[i].substring(1);
		}
		return returns;
	}

}

使用列子：

ExcelUtil<PointSumScore> excelUtil = new ExcelUtil<PointSumScore>();
		Map<String, Map<Integer, String>> map = new HashMap<String, Map<Integer, String>>();
		Map<Integer, String> value = new HashMap<Integer, String>();
		value.put(0, "未发布");
		value.put(1, "等待确认");
		value.put(2, "已确认");
		map.put("getSumPointStatus", value);
		try {
			file.createNewFile();
			String[] attrubutes = { "users.number", "users.name", "coursePoint", "users.classes.classRate",
					"qitaPoint", "jobPoint", "prizePoint", "punishpiont", "sportPoint", "dormPoint",
					"sumPoint", "sumPointStatus" };
			String[] head = { "排名", "学号", "姓名", "基本分", "班级等级分", "其他特分", "任职分", "竞赛加分", "奖惩分", "体育打卡分",
					"宿舍加分", "总分", "状态" };
			excelUtil.createExcel(pointSumScoreList, file, PointSumScore.class, attrubutes, head, map);
		} catch (Exception e) {
			e.printStackTrace();
		}