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Poi实现Excel导出工具类封装

2016-12-20 13:15| 发布者: zhangjf| 查看: 467| 评论: 0

摘要: 工具类代码PoiExcelExport如下： package com.myssm.util.poi;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.lang.reflect.Method;im ...

工具类代码PoiExcelExport如下：

  1. package com.myssm.util.poi;
  3. import java.io.File;
  4. import java.io.FileOutputStream;
  5. import java.io.IOException;
  6. import java.io.OutputStream;
  7. import java.lang.reflect.Method;
  8. import java.net.URLEncoder;
  9. import java.text.DecimalFormat;
  10. import java.util.List;
  12. import javax.servlet.http.HttpServletResponse;
  14. import org.apache.poi.hssf.usermodel.HSSFCellStyle;
  15. import org.apache.poi.hssf.usermodel.HSSFFont;
  16. import org.apache.poi.hssf.usermodel.HSSFPalette;
  17. import org.apache.poi.hssf.usermodel.HSSFWorkbook;
  18. import org.apache.poi.ss.usermodel.Cell;
  19. import org.apache.poi.ss.usermodel.CellStyle;
  20. import org.apache.poi.ss.usermodel.Row;
  21. import org.apache.poi.ss.usermodel.Sheet;
  22. import org.apache.poi.ss.util.CellRangeAddress;
  24. public class PoiExcelExport {
  25. HttpServletResponse response;
  26. // 文件名
  27. private String fileName ;
  28. //文件保存路径
  29. private String fileDir;
  30. //sheet名
  31. private String sheetName;
  32. //表头字体
  33. private String titleFontType = "Arial Unicode MS";
  34. //表头背景色
  35. private String titleBackColor = "C1FBEE";
  36. //表头字号
  37. private short titleFontSize = 12;
  38. //添加自动筛选的列 如 A:M
  39. private String address = "";
  40. //正文字体
  41. private String contentFontType = "Arial Unicode MS";
  42. //正文字号
  43. private short contentFontSize = 12;
  44. //Float类型数据小数位
  45. private String floatDecimal = ".00";
  46. //Double类型数据小数位
  47. private String doubleDecimal = ".00";
  48. //设置列的公式
  49. private String colFormula[] = null;
  51. DecimalFormat floatDecimalFormat=new DecimalFormat(floatDecimal);
  52. DecimalFormat doubleDecimalFormat=new DecimalFormat(doubleDecimal);
  54. private HSSFWorkbook workbook = null;
  56. public PoiExcelExport(String fileDir,String sheetName){
  57. this.fileDir = fileDir;
  58. this.sheetName = sheetName;
  59. workbook = new HSSFWorkbook();
  60. }
  62. public PoiExcelExport(HttpServletResponse response,String fileName,String sheetName){
  63. this.response = response;
  64. this.sheetName = sheetName;
  65. workbook = new HSSFWorkbook();
  66. }
  67. /**
  68. * 设置表头字体.
  69. * @param titleFontType
  70. */
  71. public void setTitleFontType(String titleFontType) {
  72. this.titleFontType = titleFontType;
  73. }
  74. /**
  75. * 设置表头背景色.
  76. * @param titleBackColor 十六进制
  77. */
  78. public void setTitleBackColor(String titleBackColor) {
  79. this.titleBackColor = titleBackColor;
  80. }
  81. /**
  82. * 设置表头字体大小.
  83. * @param titleFontSize
  84. */
  85. public void setTitleFontSize(short titleFontSize) {
  86. this.titleFontSize = titleFontSize;
  87. }
  88. /**
  89. * 设置表头自动筛选栏位,如A:AC.
  90. * @param address
  91. */
  92. public void setAddress(String address) {
  93. this.address = address;
  94. }
  95. /**
  96. * 设置正文字体.
  97. * @param contentFontType
  98. */
  99. public void setContentFontType(String contentFontType) {
  100. this.contentFontType = contentFontType;
  101. }
  102. /**
  103. * 设置正文字号.
  104. * @param contentFontSize
  105. */
  106. public void setContentFontSize(short contentFontSize) {
  107. this.contentFontSize = contentFontSize;
  108. }
  109. /**
  110. * 设置float类型数据小数位 默认.00
  111. * @param doubleDecimal 如 ".00"
  112. */
  113. public void setDoubleDecimal(String doubleDecimal) {
  114. this.doubleDecimal = doubleDecimal;
  115. }
  116. /**
  117. * 设置doubel类型数据小数位 默认.00
  118. * @param floatDecimalFormat 如 ".00
  119. */
  120. public void setFloatDecimalFormat(DecimalFormat floatDecimalFormat) {
  121. this.floatDecimalFormat = floatDecimalFormat;
  122. }
  123. /**
  124. * 设置列的公式
  125. * @param colFormula 存储i-1列的公式 涉及到的行号使用@替换 如A@+B@
  126. */
  127. public void setColFormula(String[] colFormula) {
  128. this.colFormula = colFormula;
  129. }
  130. /**
  131. * 写excel.
  132. * @param titleColumn 对应bean的属性名
  133. * @param titleName excel要导出的表名
  134. * @param titleSize 列宽
  135. * @param dataList 数据
  136. */
  137. public void wirteExcel(String titleColumn[],String titleName[],int titleSize[],List<?> dataList){
  138. //添加Worksheet（不添加sheet时生成的xls文件打开时会报错)
  139. Sheet sheet = workbook.createSheet(this.sheetName);
  140. //新建文件
  141. OutputStream out = null;
  142. try {
  143. if(fileDir!=null){
  144. //有文件路径
  145. out = new FileOutputStream(fileDir);
  146. }else{
  147. //否则，直接写到输出流中
  148. out = response.getOutputStream();
  149. fileName = fileName+".xls";
  150. response.setContentType("application/x-msdownload");
  151. response.setHeader("Content-Disposition", "attachment; filename="
  152. + URLEncoder.encode(fileName, "UTF-8"));
  153. }
  155. //写入excel的表头
  156. Row titleNameRow = workbook.getSheet(sheetName).createRow(0);
  157. //设置样式
  158. HSSFCellStyle titleStyle = workbook.createCellStyle();
  159. titleStyle = (HSSFCellStyle) setFontAndBorder(titleStyle, titleFontType, (short) titleFontSize);
  160. titleStyle = (HSSFCellStyle) setColor(titleStyle, titleBackColor, (short)10);
  162. for(int i = 0;i < titleName.length;i++){
  163. sheet.setColumnWidth(i, titleSize[i]*256); //设置宽度
  164. Cell cell = titleNameRow.createCell(i);
  165. cell.setCellStyle(titleStyle);
  166. cell.setCellValue(titleName[i].toString());
  167. }
  169. //为表头添加自动筛选
  170. if(!"".equals(address)){
  171. CellRangeAddress c = (CellRangeAddress) CellRangeAddress.valueOf(address);
  172. sheet.setAutoFilter(c);
  173. }
  175. //通过反射获取数据并写入到excel中
  176. if(dataList!=null&&dataList.size()>0){
  177. //设置样式
  178. HSSFCellStyle dataStyle = workbook.createCellStyle();
  179. titleStyle = (HSSFCellStyle) setFontAndBorder(titleStyle, contentFontType, (short) contentFontSize);
  181. if(titleColumn.length>0){
  182. for(int rowIndex = 1;rowIndex<=dataList.size();rowIndex++){
  183. Object obj = dataList.get(rowIndex-1); //获得该对象
  184. Class clsss = obj.getClass(); //获得该对对象的class实例
  185. Row dataRow = workbook.getSheet(sheetName).createRow(rowIndex);
  186. for(int columnIndex = 0;columnIndex<titleColumn.length;columnIndex++){
  187. String title = titleColumn[columnIndex].toString().trim();
  188. if(!"".equals(title)){ //字段不为空
  189. //使首字母大写
  190. String UTitle = Character.toUpperCase(title.charAt(0))+ title.substring(1, title.length()); // 使其首字母大写;
  191. String methodName = "get"+UTitle;
  193. // 设置要执行的方法
  194. Method method = clsss.getDeclaredMethod(methodName);
  196. //获取返回类型
  197. String returnType = method.getReturnType().getName();
  199. String data = method.invoke(obj)==null?"":method.invoke(obj).toString();
  200. Cell cell = dataRow.createCell(columnIndex);
  201. if(data!=null&&!"".equals(data)){
  202. if("int".equals(returnType)){
  203. cell.setCellValue(Integer.parseInt(data));
  204. }else if("long".equals(returnType)){
  205. cell.setCellValue(Long.parseLong(data));
  206. }else if("float".equals(returnType)){
  207. cell.setCellValue(floatDecimalFormat.format(Float.parseFloat(data)));
  208. }else if("double".equals(returnType)){
  209. cell.setCellValue(doubleDecimalFormat.format(Double.parseDouble(data)));
  210. }else{
  211. cell.setCellValue(data);
  212. }
  213. }
  214. }else{ //字段为空 检查该列是否是公式
  215. if(colFormula!=null){
  216. String sixBuf = colFormula[columnIndex].replace("@", (rowIndex+1)+"");
  217. Cell cell = dataRow.createCell(columnIndex);
  218. cell.setCellFormula(sixBuf.toString());
  219. }
  220. }
  221. }
  222. }
  224. }
  225. }
  227. workbook.write(out);
  228. } catch (Exception e) {
  229. e.printStackTrace();
  230. } finally {
  231. try {
  232. out.close();
  233. } catch (IOException e) {
  234. e.printStackTrace();
  235. }
  236. }
  237. }
  239. /**
  240. * 将16进制的颜色代码写入样式中来设置颜色
  241. * @param style 保证style统一
  242. * @param color 颜色：66FFDD
  243. * @param index 索引 8-64 使用时不可重复
  244. * @return
  245. */
  246. public CellStyle setColor(CellStyle style,String color,short index){
  247. if(color!=""&&color!=null){
  248. //转为RGB码
  249. int r = Integer.parseInt((color.substring(0,2)),16); //转为16进制
  250. int g = Integer.parseInt((color.substring(2,4)),16);
  251. int b = Integer.parseInt((color.substring(4,6)),16);
  252. //自定义cell颜色
  253. HSSFPalette palette = workbook.getCustomPalette();
  254. palette.setColorAtIndex((short)index, (byte) r, (byte) g, (byte) b);
  256. style.setFillPattern(CellStyle.SOLID_FOREGROUND);
  257. style.setFillForegroundColor(index);
  258. }
  259. return style;
  260. }
  262. /**
  263. * 设置字体并加外边框
  264. * @param style 样式
  265. * @param style 字体名
  266. * @param style 大小
  267. * @return
  268. */
  269. public CellStyle setFontAndBorder(CellStyle style,String fontName,short size){
  270. HSSFFont font = workbook.createFont();
  271. font.setFontHeightInPoints(size);
  272. font.setFontName(fontName);
  273. font.setBold(true);
  274. style.setFont(font);
  275. style.setBorderBottom(CellStyle.BORDER_THIN); //下边框
  276. style.setBorderLeft(CellStyle.BORDER_THIN);//左边框
  277. style.setBorderTop(CellStyle.BORDER_THIN);//上边框
  278. style.setBorderRight(CellStyle.BORDER_THIN);//右边框
  279. return style;
  280. }
  281. /**
  282. * 删除文件
  283. * @param fileDir
  284. * @return
  285. */
  286. public boolean deleteExcel(){
  287. boolean flag = false;
  288. File file = new File(this.fileDir);
  289. // 判断目录或文件是否存在
  290. if (!file.exists()) { // 不存在返回 false
  291. return flag;
  292. } else {
  293. // 判断是否为文件
  294. if (file.isFile()) { // 为文件时调用删除文件方法
  295. file.delete();
  296. flag = true;
  297. }
  298. }
  299. return flag;
  300. }
  301. /**
  302. * 删除文件
  303. * @param fileDir
  304. * @return
  305. */
  306. public boolean deleteExcel(String path){
  307. boolean flag = false;
  308. File file = new File(path);
  309. // 判断目录或文件是否存在
  310. if (!file.exists()) { // 不存在返回 false
  311. return flag;
  312. } else {
  313. // 判断是否为文件
  314. if (file.isFile()) { // 为文件时调用删除文件方法
  315. file.delete();
  316. flag = true;
  317. }
  318. }
  319. return flag;
  320. }
  321. }
复制代码

测试如下：

实体bean:

  1. package com.myssm.util.poi;
  3. public class Man {
  4. private String name;
  5. private int sex;
  6. private String idCard;
  7. private float salary;
  8. public Man(String name, int sex, String idCard, float salary) {
  9. super();
  10. this.name = name;
  11. this.sex = sex;
  12. this.idCard = idCard;
  13. this.salary = salary;
  14. }
  16. public Man() {
  17. super();
  18. }
  20. public String getName() {
  21. return name;
  22. }
  23. public void setName(String name) {
  24. this.name = name;
  25. }
  26. public int getSex() {
  27. return sex;
  28. }
  29. public void setSex(int sex) {
  30. this.sex = sex;
  31. }
  32. public String getIdCard() {
  33. return idCard;
  34. }
  35. public void setIdCard(String idCard) {
  36. this.idCard = idCard;
  37. }
  38. public float getSalary() {
  39. return salary;
  40. }
  41. public void setSalary(float salary) {
  42. this.salary = salary;
  43. }
  46. }
复制代码
测试类：
  1. package com.myssm.util.poi;
  3. import java.util.ArrayList;
  4. import java.util.List;
  6. public class Test {
  8. public static void main(String[] args) {
  9. PoiExcelExport pee = new PoiExcelExport("E:/test.xls","sheet1");
  10. //数据
  11. List<Man> dataList = new ArrayList();
  12. Man man1 = new Man("张三",20,"男",(float)10000.8);
  13. Man man2 = new Man("李四",21,"男",(float)11000.8);
  14. Man man3 = new Man("王五",22,"女",(float)1200.8);
  15. Man man4 = new Man("赵六",23,"男",(float)13000.8);
  16. Man man5 = new Man("田七",24,"男",(float)14000.8);
  17. Man man6 = new Man();
  18. man6.setName("老八");
  19. dataList.add(man1);dataList.add(man2);dataList.add(man3);dataList.add(man4);dataList.add(man5);
  20. dataList.add(man6);
  21. //调用
  22. String titleColumn[] = {"name","sex","idCard","salary",""};
  23. String titleName[] = {"姓名","性别","身份证号","月薪","年薪"};
  24. int titleSize[] = {13,13,13,13,13};
  25. //其他设置 set方法可全不调用
  26. String colFormula[] = new String[5];
  27. colFormula[4] = "D@*12"; //设置第5列的公式
  28. pee.setColFormula(colFormula);
  29. pee.setAddress("A:D"); //自动筛选
  31. pee.wirteExcel(titleColumn, titleName, titleSize, dataList);
  32. }
  34. }
复制代码



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