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;}}?