使用poi解決導出excel內下拉框枚舉項較多的問題

時間 2019-11-06

標籤使用 poi 解決導出 excel 下拉枚舉較多問題欄目 Apache 简体版

原文原文鏈接

廢話少說，直接上代碼：html

  1 package com.fst.attachment.controller;
  2 
  3 import java.io.FileOutputStream;
  4 
  5 import org.apache.poi.hssf.usermodel.DVConstraint;
  6 import org.apache.poi.hssf.usermodel.HSSFDataValidation;
  7 import org.apache.poi.hssf.usermodel.HSSFSheet;
  8 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
  9 import org.apache.poi.ss.usermodel.DataValidation;
 10 import org.apache.poi.ss.usermodel.DataValidationConstraint;
 11 import org.apache.poi.ss.usermodel.DataValidationHelper;
 12 import org.apache.poi.ss.usermodel.Name;
 13 import org.apache.poi.ss.usermodel.Sheet;
 14 import org.apache.poi.ss.usermodel.Workbook;
 15 import org.apache.poi.ss.util.CellRangeAddressList;
 16 import org.apache.poi.xssf.streaming.SXSSFWorkbook;
 17 import org.apache.poi.xssf.usermodel.XSSFDataValidation;
 18 import org.apache.poi.xssf.usermodel.XSSFDataValidationConstraint;
 19 import org.apache.poi.xssf.usermodel.XSSFDataValidationHelper;
 20 import org.apache.poi.xssf.usermodel.XSSFSheet;
 21 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 22 
 23 public class TestPOIDropDown {
 24 
 25     public static void main(String[] args) throws Exception {
 26         // 建立枚舉項
 27         int len = 200;
 28         String[] datas = new String[len];
 29         for (int i = 0; i < len; i++) {
 30             datas[i] = i + "我是下拉框枚舉項---";
 31         }
 32 
 33         // ----------------生成--------------------------------
 34         // 方法一：使用createExplicitListConstraint實現，缺陷爲：
 35         // 只能知足較少枚舉項的下拉框，最好不要超過20個，具體個數根據枚舉字段長度而定。
 36         // Workbook workbook = HSSFSetDropDown(datas);
 37         // Workbook workbook = XSSFSetDropDown(datas);
 38         // Workbook workbook = SXSSFSetDropDown(datas);
 39         /*
 40          * 簡單比較HSSF、XSSF、SXSSF： - 因爲新的XSSF支持Excel 2007 OOXML（.xlsx）文件是基於XML的，
 41          * 所以處理它們的內存佔用量高於舊版HSSF支持的（.xls）二進制文件。 -
 42          * SXSSF（3.8-beta3以後支持）在生成很是大的電子表格時使用， 相較於XSSF,其在某個時間點只能訪問有限數量的行。
 43          * http://poi.apache.org/components/spreadsheet/
 44          */
 45 
 46         // 方法二：使用createFormulaListConstraint實現，其適用於較多枚舉項的下拉框，
 47         // 實現步驟大體爲：建立一個隱藏的sheet，並往裏放入枚舉項，而後在第一個sheet內增長關聯關係
 48         Workbook workbook = XSSFSetDropDownAndHidden(datas);
 49 
 50         // 輸出
 51         FileOutputStream stream = new FileOutputStream("d:\\testDropDown.xlsx");
 52         workbook.write(stream);
 53         stream.close();
 54     }
 55     
 56 
 57     /**
 58      * 使用createFormulaListConstraint實現下拉框
 59      * @param formulaString
 60      * @return
 61      */
 62     public static Workbook XSSFSetDropDownAndHidden(String[] formulaString) {
 63         Workbook workbook = new XSSFWorkbook();
 64         Sheet sheet = workbook.createSheet("下拉列表測試");
 65         // 建立sheet，寫入枚舉項
 66         Sheet hideSheet = workbook.createSheet("hiddenSheet");
 67         for (int i = 0; i < formulaString.length; i++) {
 68             hideSheet.createRow(i).createCell(0).setCellValue(formulaString[i]);
 69         }
 70         // 建立名稱，可被其餘單元格引用
 71         Name category1Name = workbook.createName();
 72         category1Name.setNameName("hidden");
 73         // 設置名稱引用的公式
 74         // 使用像'A1：B1'這樣的相對值會致使在Microsoft Excel中使用工做簿時名稱所指向的單元格的意外移動，
 75         // 一般使用絕對引用，例如'$A$1:$B$1'能夠避免這種狀況。
 76         // 參考： http://poi.apache.org/apidocs/dev/org/apache/poi/ss/usermodel/Name.html
 77         category1Name.setRefersToFormula("hiddenSheet!" + "$A$1:$A$" + formulaString.length);
 78         // 獲取上文名稱內數據
 79         DataValidationHelper helper = sheet.getDataValidationHelper();
 80         DataValidationConstraint constraint = helper.createFormulaListConstraint("hidden");
 81         // 設置下拉框位置
 82         CellRangeAddressList addressList = new CellRangeAddressList(0, 200, 0, 0);
 83         DataValidation dataValidation = helper.createValidation(constraint, addressList);
 84         // 處理Excel兼容性問題
 85         if (dataValidation instanceof XSSFDataValidation) {
 86             // 數據校驗
 87             dataValidation.setSuppressDropDownArrow(true);
 88             dataValidation.setShowErrorBox(true);
 89         } else {
 90             dataValidation.setSuppressDropDownArrow(false);
 91         }
 92         // 做用在目標sheet上
 93         sheet.addValidationData(dataValidation);
 94         // 設置hiddenSheet隱藏
 95         workbook.setSheetHidden(1, true);
 96         return workbook;
 97     }
 98     
 99 
100     /**
101      * 使用較早版本的 HSSF用戶模型設置表格下拉框 缺陷：下拉框數據量超過必定數量時，系統拋異常。
102      * 
103      * @param formulaString
104      * 
105      */
106     public static Workbook HSSFSetDropDown(String[] formulaString) {
107         HSSFWorkbook workbook = new HSSFWorkbook();
108         HSSFSheet sheet = workbook.createSheet("下拉列表測試");
109         // 加載下拉列表內容
110         DVConstraint constraint = DVConstraint.createExplicitListConstraint(formulaString);
111         // 設置數據有效性加載在哪一個單元格上。
112         // 四個參數分別是：起始行、終止行、起始列、終止列
113         CellRangeAddressList regions = new CellRangeAddressList(0, 200, 0, 0);
114         // 數據有效性對象
115         DataValidation dataValidation = new HSSFDataValidation(regions, constraint);
116         sheet.addValidationData(dataValidation);
117         return workbook;
118     }
119 
120     /**
121      * 使用 XSSF用戶模型設置表格下拉框，多用來處理xlsx後綴的excel 缺陷：下拉框數據量超過必定數量時，文件打不開。
122      * 
123      * @param formulaString
124      * 
125      */
126     public static Workbook XSSFSetDropDown(String[] formulaString) {
127         XSSFWorkbook workbook = new XSSFWorkbook();
128         XSSFSheet sheet = workbook.createSheet("下拉列表測試");
129         XSSFDataValidationHelper dvHelper = new XSSFDataValidationHelper(sheet);
130         XSSFDataValidationConstraint dvConstraint = (XSSFDataValidationConstraint) dvHelper
131                 .createExplicitListConstraint(formulaString);
132         CellRangeAddressList addressList = null;
133         XSSFDataValidation validation = null;
134         for (int i = 0; i < 500; i++) {
135             addressList = new CellRangeAddressList(i, i, 0, 0);
136             validation = (XSSFDataValidation) dvHelper.createValidation(dvConstraint, addressList);
137             // 07默認setSuppressDropDownArrow(true);
138             // validation.setSuppressDropDownArrow(true);
139             // validation.setShowErrorBox(true);
140             sheet.addValidationData(validation);
141         }
142         return workbook;
143     }
144 
145     /**
146      * 使用 SXSSF用戶模型設置表格下拉框 缺陷：下拉框數據量超過必定數量時，文件打不開。
147      * 
148      * @param formulaString
149      * 
150      */
151     public static Workbook SXSSFSetDropDown(String[] formulaString) {
152         SXSSFWorkbook workbook = new SXSSFWorkbook();
153         Sheet sheet = workbook.createSheet("下拉列表測試");
154         // 加載下拉列表內容
155         DataValidationHelper helper = sheet.getDataValidationHelper();
156         DataValidationConstraint constraint = helper.createExplicitListConstraint(formulaString);
157         // 設置下拉框位置
158         CellRangeAddressList addressList = null;
159         addressList = new CellRangeAddressList(0, 500, 0, 0);
160         DataValidation dataValidation = helper.createValidation(constraint, addressList);
161         // 處理Excel兼容性問題
162         if (dataValidation instanceof XSSFDataValidation) {
163             // 數據校驗
164             dataValidation.setSuppressDropDownArrow(true);
165             dataValidation.setShowErrorBox(true);
166         } else {
167             dataValidation.setSuppressDropDownArrow(false);
168         }
169         sheet.addValidationData(dataValidation);
170         return workbook;
171     }
172 
173 }

demo：java

  1 package logic.bsc.excelTemplateExport;
  2 
  3 import java.io.IOException;
  4 import java.io.PrintWriter;
  5 
  6 import javax.servlet.ServletException;
  7 import javax.servlet.ServletOutputStream;
  8 import javax.servlet.http.HttpServlet;
  9 import javax.servlet.http.HttpServletRequest;
 10 import javax.servlet.http.HttpServletResponse;
 11 import javax.servlet.http.HttpSession;
 12 
 13 import logic.oec.OecToExcel;
 14 import logic.pxks.ExcelOut;
 15 
 16 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 17 import org.apache.poi.ss.usermodel.DataValidation;
 18 import org.apache.poi.ss.usermodel.DataValidationConstraint;
 19 import org.apache.poi.ss.usermodel.DataValidationHelper;
 20 import org.apache.poi.ss.util.CellRangeAddressList;
 21 import org.apache.poi.xssf.usermodel.XSSFDataValidation;
 22 import org.apache.poi.xssf.usermodel.XSSFName;
 23 import org.apache.poi.xssf.usermodel.XSSFRow;
 24 import org.apache.poi.xssf.usermodel.XSSFSheet;
 25 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 26 
 27 import com.usrObj.User;
 28 import com.yunhe.tools.Dates;
 29 import com.yunhe.tools.Excels;
 30 import com.yunhe.tools.Htmls;
 31 
 32 
 33 public class ExcelTDSExport extends HttpServlet {
 34 
 35     /** 轉碼成 UTF-8
 36      * Constructor of the object.
 37      */
 38     public ExcelTDSExport() {
 39         super();
 40     }
 41 
 42     /** 轉碼成 UTF-8
 43      * Destruction of the servlet. <br>
 44      */
 45     public void destroy() {
 46         super.destroy(); // Just puts "destroy" string in log
 47         // Put your code here
 48     }
 49 
 50     /** 轉碼成 UTF-8
 51      * The doGet method of the servlet. <br>
 52      *
 53      * This method is called when a form has its tag value method equals to get.
 54      * 
 55      * @param request the request send by the client to the server
 56      * @param response the response send by the server to the client
 57      * @throws ServletException if an error occurred
 58      * @throws IOException if an error occurred
 59      */
 60     public void doGet(HttpServletRequest request, HttpServletResponse response)
 61             throws ServletException, IOException {
 62            
 63         
 64         
 65         
 66         
 67          String[] formulaString = new String[] {"維持","恢復","調整","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111"};
 68         
 69          
 70          XSSFWorkbook wb = new XSSFWorkbook();
 71          XSSFSheet sheet = wb.createSheet("下拉列表測試");
 72             // 建立sheet，寫入枚舉項
 73          XSSFSheet hideSheet = wb.createSheet("hiddenSheet");
 74             for (int i = 0; i < formulaString.length; i++) {
 75                 hideSheet.createRow(i).createCell(0).setCellValue(formulaString[i]);
 76             }
 77             // 建立名稱，可被其餘單元格引用
 78             XSSFName  category1Name = wb.createName();
 79             category1Name.setNameName("hidden");
 80             // 設置名稱引用的公式
 81             // 使用像'A1：B1'這樣的相對值會致使在Microsoft Excel中使用工做簿時名稱所指向的單元格的意外移動，
 82             // 一般使用絕對引用，例如'$A$1:$B$1'能夠避免這種狀況。
 83             // 參考： http://poi.apache.org/apidocs/dev/org/apache/poi/ss/usermodel/Name.html
 84             category1Name.setRefersToFormula("hiddenSheet!" + "$A$1:$A$" + formulaString.length);
 85             // 獲取上文名稱內數據
 86             DataValidationHelper helper = sheet.getDataValidationHelper();
 87             DataValidationConstraint constraint = helper.createFormulaListConstraint("hidden");
 88             // 設置下拉框位置
 89             CellRangeAddressList addressList = new CellRangeAddressList(0, 200, 0, 0);
 90             DataValidation dataValidation = helper.createValidation(constraint, addressList);
 91             // 處理Excel兼容性問題
 92             if (dataValidation instanceof XSSFDataValidation) {
 93                 // 數據校驗
 94                 dataValidation.setSuppressDropDownArrow(true);
 95                 dataValidation.setShowErrorBox(true);
 96             } else {
 97                 dataValidation.setSuppressDropDownArrow(false);
 98             }
 99             // 做用在目標sheet上
100             sheet.addValidationData(dataValidation);
101             // 設置hiddenSheet隱藏
102             wb.setSheetHidden(1, true);
103 
104          
105          
106         
107 //        //工做區     
108 //        XSSFWorkbook wb = new XSSFWorkbook();     
109 //        XSSFSheet sheet= wb.createSheet("test");    
110 //        //若是循環超過10172次，則報內存溢出，有誰循環超過10萬次不報錯，麻煩請告訴我，這樣是由於能夠一次性導出大量數據  
111 //        for(int i=0;i<2;i++){  
112 //            //建立第一個sheet     
113 //            //生成第一行     
114 //            XSSFRow row = sheet.createRow(i);     
115 //            //給這一行的第一列賦值     
116 //            row.createCell(0).setCellValue("column1");     
117 //            //給這一行的第一列賦值     
118 //            row.createCell(1).setCellValue("column2");
119 //        } 
120 //
121 //        
122 //      
123 //        //String[] formulaString = new String[] {"維持","恢復","調整","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111","調整111111111111111111111111111111111111111111111"};
124 //        XSSFSheet category1Hidden = wb.createSheet("hideSheet"); // 建立隱藏域
125 //        for (int i = 0, length = formulaString.length; i < length; i++) { // 循環賦值（爲了防止下拉框的行數與隱藏域的行數相對應來獲取>=選中行數的數組，將隱藏域加到結束行以後）
126 //            category1Hidden.createRow(i).createCell(0).setCellValue(formulaString[i]);
127 //        } 
128 //        
129         
130         
131         
132 //      //加載下拉列表內容
133 //        DataValidationHelper helper = sheet.getDataValidationHelper();
134 //        DataValidationConstraint constraint = helper.createExplicitListConstraint(formulaString);
135 //        //設置下拉框位置
136 //        CellRangeAddressList addressList = null;
137 //        addressList = new CellRangeAddressList(0, 10, 1, 1);
138 //        DataValidation dataValidation = helper.createValidation(constraint, addressList);
139 //        //處理Excel兼容性問題
140 //        if(dataValidation instanceof XSSFDataValidation){
141 //            //數據校驗
142 //            dataValidation.setSuppressDropDownArrow(true);
143 //            dataValidation.setShowErrorBox(true);
144 //        }else{
145 //            dataValidation.setSuppressDropDownArrow(false);
146 //        }
147 //        sheet.addValidationData(dataValidation);
148 
149         
150         
151         
152         
153         
154         String fileHeader = "abc";
155         if(fileHeader==null||fileHeader.length()==0){
156             fileHeader = "";
157         }
158         String fullname = fileHeader + System.currentTimeMillis() + ".xlsx";// 生成文件名
159         if (request.getHeader("User-Agent").indexOf("MSIE 5.5") != -1) {
160             response.setHeader("Content-Disposition", "filename=" + fullname);
161         } else {
162             response.addHeader("Content-Disposition", "attachment;filename="
163                     + fullname);
164         }
165 
166         response.setHeader("Content-Type", "application/msexcel");
167         ServletOutputStream streamOut = null;
168 
169         try {
170             streamOut = response.getOutputStream();
171             wb.write(streamOut);// 將數據寫入輸出流
172         } catch (Exception e) {
173         } finally {
174             if (streamOut != null) {
175                 try {
176                     streamOut.close();
177                 } catch (Exception e1) {
178                 }
179             }
180         }
181 
182         response.setStatus(response.SC_OK);
183 
184         try {
185             response.flushBuffer();// 推送
186         } catch (IOException e) {
187             // TODO Auto-generated catch block
188             e.printStackTrace();
189         }
190        
191         
192     }
193 
194     /** 轉碼成 UTF-8
195      * The doPost method of the servlet. <br>
196      *
197      * This method is called when a form has its tag value method equals to post.
198      * 
199      * @param request the request send by the client to the server
200      * @param response the response send by the server to the client
201      * @throws ServletException if an error occurred
202      * @throws IOException if an error occurred
203      */
204     public void doPost(HttpServletRequest request, HttpServletResponse response)
205             throws ServletException, IOException {
206 
207         doGet(request, response);
208     }
209 
210     /** 轉碼成 UTF-8
211      * The doPut method of the servlet. <br>
212      *
213      * This method is called when a HTTP put request is received.
214      * 
215      * @param request the request send by the client to the server
216      * @param response the response send by the server to the client
217      * @throws ServletException if an error occurred
218      * @throws IOException if an error occurred
219      */
220     public void doPut(HttpServletRequest request, HttpServletResponse response)
221             throws ServletException, IOException {
222 
223         // Put your code here
224     }
225 
226     /** 轉碼成 UTF-8
227      * Returns information about the servlet, such as 
228      * author, version, and copyright. 
229      *
230      * @return String information about this servlet
231      */
232     public String getServletInfo() {
233         return "This is my default servlet created by Eclipse";
234     }
235 
236     /** 轉碼成 UTF-8
237      * Initialization of the servlet. <br>
238      *
239      * @throws ServletException if an error occurs
240      */
241     public void init() throws ServletException {
242         // Put your code here
243     }
244 
245 }

參考
http://poi.apache.org/apidocs/dev/org/apache/poi/ss/usermodel/Name.html
http://poi.apache.org/components/spreadsheet/
最後
轉帖請註明出處，謝謝
---------------------
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原文連接：https://blog.csdn.net/fei565789229/article/details/85016091apache