导出文件工具类（.txt、excel）

import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import java.lang.reflect.Method;

public class EduceFile {
	/**
	 * 导出excel 实现通用
	 * 
	 * @param list
	 * @param path
	 *            导出路径
	 * @param sheetName
	 *            导出文件名
	 * @param topNamelist
	 *            表头
	 * @param FieldNamelist
	 *            字段名称
	 * @return
	 */
	public boolean writeExcel(List list, String path, String sheetName,
			String[] topNamelist, String[] FieldNamelist) {
		try {
			File fileWrite = new File(path);
			fileWrite.createNewFile();
			OutputStream os = new FileOutputStream(fileWrite);
			WritableWorkbook wwb = Workbook.createWorkbook(os);
			WritableSheet ws = wwb.createSheet(sheetName, 0);
			// 写入列名称
			for (int i = 0; i < topNamelist.length; i++) {
				Label label = new Label(i, 0, topNamelist[i].toString());
				ws.addCell(label);
			}
			for (int i = 0; i < list.size(); i++) {
				int x = i + 1;
				Map map = testReflect(list.get(i));
				for (int j = 0; j < FieldNamelist.length; j++) {
					if (map.get(FieldNamelist[j]) != null) {
						Label labela = new Label(j, x, map
								.get(FieldNamelist[j]).toString());
						ws.addCell(labela);
					} else {
						Label labela = new Label(j, x, null);
						ws.addCell(labela);
					}
				}
			}
			wwb.write();
			wwb.close();
			os.close();
			return true;
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
	}

	/**
	 * 导出.txt
	 * 
	 * @param list
	 * @param path
	 * @return
	 */
	public String writeTxt(List<String> list, String path) {
		try {
			FileWriter fw = new FileWriter(path, true);
			PrintWriter pw = new PrintWriter(fw);
			for (int i = 0; i < list.size(); i++) {
				pw.println(list.get(i));
			}
			pw.close();
			fw.close();
			return "true";
		} catch (Exception e) {
			e.printStackTrace();
			return "false";
		}
	}

	public static Map testReflect(Object obj) {
		Map hashMap = new HashMap();
		try {
			Class c = obj.getClass();
			Method m[] = c.getDeclaredMethods();
			for (int i = 0; i < m.length; i++) {
				if (m[i].getName().indexOf("get") == 0) {
					hashMap
							.put(m[i].getName(), m[i]
									.invoke(obj, new Object[0]));
				}
			}
		} catch (Throwable e) {
			System.err.println(e);
		}
		return hashMap;
	}
}