java 導出多個Sheet的Excel文件

  1 package com.forestar.patrol.service;
  2 
  3 import org.apache.poi.hssf.usermodel.*;
  4 import org.apache.poi.ss.usermodel.HorizontalAlignment;
  5 import org.springframework.stereotype.Service;
  6 
  7 import javax.servlet.http.HttpServletResponse;
  8 import java.io.IOException;
  9 import java.io.OutputStream;
 10 import java.nio.charset.StandardCharsets;
 11 import java.time.LocalTime;
 12 import java.util.ArrayList;
 13 import java.util.HashMap;
 14 import java.util.List;
 15 import java.util.Map;
 16 
 17 @Service
 18 public class ExcelService {
 19     
 20     public void exportExchange(HttpServletResponse response) {
 21 
 22         //全部數據
 23         List<List<Map<String,Object>>> list = new ArrayList<>();
 24 
 25         //第一個sheet的數據
 26         List<Map<String,Object>> maps1 = new ArrayList<>();
 27         Map<String,Object> map1 = new HashMap<>();
 28         map1.put("A", 11001);
 29         map1.put("B", 22001);
 30         map1.put("C", 33001);
 31         maps1.add(map1);
 32         Map<String,Object> map2 = new HashMap<>();
 33         map2.put("A", 11002);
 34         map2.put("B", 22002);
 35         map2.put("C", 33002);
 36         maps1.add(map2);
 37 
 38         //第二個sheet的數據
 39         List<Map<String,Object>> maps2 = new ArrayList<>();
 40         Map<String,Object> map11 = new HashMap<>();
 41         map11.put("A", 111001);
 42         map11.put("B", 222001);
 43         map11.put("C", 333001);
 44         maps2.add(map11);
 45         Map<String,Object> map22 = new HashMap<>();
 46         map22.put("A", 111002);
 47         map22.put("B", 222002);
 48         map22.put("C", 333002);
 49         maps2.add(map22);
 50 
 51         list.add(maps1);
 52         list.add(maps2);
 53 
 54         //列信息
 55         String[] tableHeader = {"col-1","col-2","col-3"};
 56         HSSFWorkbook workbook = new HSSFWorkbook(); //創建一個Excel
 57         HSSFCellStyle style = workbook.createCellStyle(); //設置表頭的類型
 58         style.setAlignment(HorizontalAlignment.CENTER);
 59         HSSFCellStyle style1 = workbook.createCellStyle(); //設置數據類型
 60         style1.setAlignment(HorizontalAlignment.CENTER);
 61         HSSFFont font = workbook.createFont(); //設置字體
 62 
 63         for (int j = 0; j < list.size(); j++) {
 64             List<Map<String, Object>> maps = list.get(j);
 65 
 66             HSSFSheet sheet = workbook.createSheet("sheet"+(j+1)); //創建一個sheet
 67             HSSFHeader header = sheet.getHeader();//設置sheet的頭
 68             try {
 69                 //根據是否取出數據，設置header信息
 70                 if (maps.size() == 0) {
 71                     header.setCenter("無數據");
 72                 } else {
 73                     header.setCenter("導出信息");
 74                     HSSFRow row = sheet.createRow(0);
 75                     row.setHeight((short) 400);
 76                     HSSFCell cell = null;
 77                     //表頭
 78                     for (int k = 0; k < tableHeader.length; k++) {
 79                         cell = row.createCell((short) k);//創建第0行第k列
 80                         cell.setCellValue(tableHeader[k]);//設置第0行第k列的值
 81                         sheet.setColumnWidth((short) k, (short) 8000);//設置列的寬度
 82                         font.setColor(HSSFFont.COLOR_NORMAL); // 設置單元格字體的顏色.
 83                         font.setFontHeight((short) 350); //設置單元字體高度
 84                         style1.setFont(font);//設置字體風格
 85                         cell.setCellStyle(style1);
 86                     }
 87                     // 給Excel填充數據
 88                     for (int i = 0; i < maps.size(); i++) {
 89                         //獲取InternationalStudent對象
 90                         Map<String, Object> map = maps.get(i);
 91                         row = sheet.createRow((short) (i + 1));//創建第i+1行
 92                         row.setHeight((short) 400);//設置行高
 93 
 94                         if (map.get("A") != null) {
 95                             cell = row.createCell((short) 0);//創建第i+1行第0列
 96                             cell.setCellValue(map.get("A").toString());//設置第i+1行第0列的值
 97                             cell.setCellStyle(style);//設置風格
 98                         }
 99                         if (map.get("B") != null) {
100                             cell = row.createCell((short) 1); //創建第i+1行第1列
101                             cell.setCellValue(map.get("B").toString());//設置第i+1行第1列的值
102                             cell.setCellStyle(style); //設置風格
103                         }
104                         if (map.get("C") != null) {
105                             cell = row.createCell((short) 2); //創建第i+1行第1列
106                             cell.setCellValue(map.get("C").toString());//設置第i+1行第1列的值
107                             cell.setCellStyle(style); //設置風格
108                         }
109 
110                     }
111                 }
112             } catch (Exception e) {
113                 e.printStackTrace();
114             }
115         }
116         outputSetting(workbook,"導出信息("+ LocalTime.now() +").xls",response);
117     }
118 
119     //固定配置
120     public void outputSetting(HSSFWorkbook workbook ,String fileName ,HttpServletResponse response) {
121         OutputStream out = null;//創建一個輸出流對象
122         try {
123             out = response.getOutputStream();// 得到輸出流
124             response.setHeader("Content-disposition","attachment; filename="+new String(fileName.getBytes(), StandardCharsets.ISO_8859_1));//filename是下載的xls的名
125             response.setContentType("application/msexcel;charset=UTF-8");//設置類型
126             response.setHeader("Pragma","No-cache");//設置頭
127             response.setHeader("Cache-Control","no-cache");//設置頭
128             response.setDateHeader("Expires", 0);//設置日期頭
129             workbook.write(out);
130             out.flush();
131             workbook.write(out);
132         } catch (IOException e) {
133             e.printStackTrace();
134         }finally{
135             try{
136                 if(out!=null){
137                     out.close();
138                 }
139             }catch(IOException e){
140                 e.printStackTrace();
141             }
142         }
143     }
144 
145 
146 }

 

需要引用的包：

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>4.1.2</version>
        </dependency>

 

導出文件預覽：