POI对Excel的操作

1. 先导包

commons-io-2.6.jar包，用于对文件的操作。

下载地址：http://commons.apache.org/proper/commons-io/download_io.cgi

poi-3.17.jar包，对Excel表的操作。

下载地址：http://poi.apache.org/download.html#POI-3.17

2. 假设Excel表的表头和主体内容

 //表头数组
 String[] title = {"id","username","password","gender","address"};
 //主体内容
 String[][] sheetBodyValue = {
     {"001","test1","123456","男","中国北京"},
     {"002","test2","123456","女","中国北京"},
     {"003","test3","123456","男","中国北京"},
     {"004","test4","123456","女","中国北京"}
 };
         

3. 创建Excel表

 HSSFWorkbook workBook = new HSSFWorkbook();

4. 创建excel页面，即sheet

 HSSFSheet sheet = workBook.createSheet();

5. 创建表头行

 //创建第index行 sheet.createRow(index)
 HSSFRow titleRow = sheet.createRow(0);

6. 创建表头单元格，并遍历表头数组，设置表头

 for (int i = 0; i < title.length; i++) {
     HSSFCell titleCell= titleRow.createCell(i);
     titleCell.setCellValue(title[i]);
 }

7. 从第二行开始创建主体内容

 for (int i = 1; i <= sheetBodyValue.length; i++) {
     //创建第i行
     HSSFRow bodyRow = sheet.createRow(i);
     //创建单元格，并为每个单元格赋值
     for (int j = 0; j < sheetBodyValue[0].length; j++) {
         HSSFCell bodyCell = bodyRow.createCell(j);
         bodyCell.setCellValue(sheetBodyValue[i-1][j]);
     }
 }

8. 创建文件，用文件输出流输出数据

 File file = new File("D:/poi_text.xls");
 try {
     file.createNewFile();
     FileOutputStream outputStream = FileUtils.openOutputStream(file);
     workBook.write(outputStream);
     outputStream.close();//记得关闭输出流
 } catch (IOException e) {
     e.printStackTrace();
 }

9. 最后附上全部代码

 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;

 import org.apache.commons.io.FileUtils;
 import org.apache.poi.hssf.usermodel.HSSFCell;
 import org.apache.poi.hssf.usermodel.HSSFRow;
 import org.apache.poi.hssf.usermodel.HSSFSheet;
 import org.apache.poi.hssf.usermodel.HSSFWorkbook;

 public class testExcel {

     @SuppressWarnings("resource")
     public static void createExcel(){
         //表头数组
         String[] title = {"id","username","password","gender","address"};
         //主体内容
         String[][] sheetBodyValue = {
                 {"001","test1","123456","男","中国北京"},
                 {"002","test2","123456","女","中国北京"},
                 {"003","test3","123456","男","中国北京"},
                 {"004","test4","123456","女","中国北京"}
             };

         //创建excel表
         HSSFWorkbook workBook = new HSSFWorkbook();
         //创建excel页面，即sheet
         HSSFSheet sheet = workBook.createSheet();
         //创建表头行,第index行 sheet.createRow(index)
         HSSFRow titleRow = sheet.createRow(0);

         //创建表头,第一行
         for (int i = 0; i < title.length; i++) {
             HSSFCell titleCell= titleRow.createCell(i);
             titleCell.setCellValue(title[i]);
         }

         //从第二行开始创建主体内容
         for (int i = 1; i <= sheetBodyValue.length; i++) {
             HSSFRow bodyRow = sheet.createRow(i);//创建第i行
             for (int j = 0; j < sheetBodyValue[0].length; j++) {
                 HSSFCell bodyCell = bodyRow.createCell(j);
                 bodyCell.setCellValue(sheetBodyValue[i-1][j]);
             }
         }
         //创建文件
         File file = new File("D:/poi_text.xls");
         try {
             file.createNewFile();
             FileOutputStream outputStream = FileUtils.openOutputStream(file);
             workBook.write(outputStream);
             outputStream.close();//记得关闭输出流
         } catch (IOException e) {
             e.printStackTrace();
         }
     }
     public static void main(String[] args) {
         createExcel();
     }
 }

本人也是初次接触POI对Excel表的操作，还有很多关于POI操作的知识点需要去掌握。

写一下个人对导出Excel表的操作小结。

希望与君共勉，共同进步。