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java生成Excel两种方式

方法一,利用第三方jar包:jxl.jar

无论方法一方法二最后最好用转换成流传给前端。

 1 public void createExcel(){  
 2         try{  
 3             //打开文件  
 4             WritableWorkbook workbook = Workbook.createWorkbook(new File("test.xls"));  
 5             //生成名为“第一页”的工作表,参数0表示这是第一页   
 6             WritableSheet sheet = workbook.createSheet("第一页", 0);  
 7             //在Label对象的构造子中指名单元格位置是第一列第一行(0,0)   
 8             //以及单元格内容为test   
 9             Label label = new Label(0,0,"test");  
10             //将定义好的单元格添加到工作表中   
11             sheet.addCell(label);  
12             /*生成一个保存数字的单元格    
13              * 必须使用Number的完整包路径,否则有语法歧义    
14              * 单元格位置是第二列,第一行,值为789.123*/   
15             jxl.write.Number number = new jxl.write.Number(1,0,756);  
16               
17             sheet.addCell(number);  
18               
19             sheet.insertColumn(1);  
20               
21             workbook.copySheet(0, "第二页", 1);  
22               
23             WritableSheet sheet2 = workbook.getSheet(1);  
24             Range range = sheet2.mergeCells(0, 0, 0, 8);  
25             sheet2.unmergeCells(range);  
26               
27             sheet2.addImage(new WritableImage(5, 5, 10, 20, new File("F:\\09.png")));  
28               
29               
30             CellView cv = new CellView();  
31               
32             WritableCellFormat cf = new WritableCellFormat();  
33             cf.setBackground(Colour.BLUE);  
34               
35             cv.setFormat(cf);  
36             cv.setSize(6000);  
37             cv.setDimension(10);  
38               
39             sheet2.setColumnView(2, cv);  
40               
41             workbook.write();  
42             workbook.close();  
43               
44         }catch(Exception e){}  
45     }  

同时,读取Excel中的内容为:

 1 public void displayExcel(){  
 2         try {  
 3             Workbook wb = Workbook.getWorkbook(new File("test.xls"));  
 4               
 5             Sheet s = wb.getSheet(0);  
 6             System.out.println(s.getCell(0, 0).getContents());  
 7         } catch (BiffException e) {  
 8             // TODO Auto-generated catch block  
 9             e.printStackTrace();  
10         } catch (IOException e) {  
11             // TODO Auto-generated catch block  
12             e.printStackTrace();  
13         }  
14           
15     }  

方法二,利用jar包:poi-3.2-FINAL-20081019.jar

 1 public void exportExcel(){  
 2           
 3         HSSFWorkbook wb = new HSSFWorkbook();//创建工作薄  
 4           
 5         HSSFFont font = wb.createFont();  
 6         font.setFontHeightInPoints((short)24);  
 7         font.setFontName("宋体");  
 8         font.setColor(HSSFColor.BLACK.index);  
 9         font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);  
10           
11         HSSFCellStyle style = wb.createCellStyle();  
12         style.setAlignment(HSSFCellStyle.ALIGN_CENTER);  
13         style.setFillForegroundColor(HSSFColor.LIGHT_TURQUOISE.index);  
14         style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
15         style.setBorderBottom(HSSFCellStyle.BORDER_THICK);  
16         style.setFont(font);  
17           
18         HSSFSheet sheet = wb.createSheet("test");//创建工作表,名称为test  
19           
20         int iRow = 0;//行号  
21         int iMaxCol = 17;//最大列数  
22         HSSFRow row = sheet.createRow(iRow);  
23         HSSFCell cell = row.createCell((short)0);  
24         cell.setCellValue(new HSSFRichTextString("测试excel"));  
25         cell.setCellStyle(style);  
26         sheet.addMergedRegion(new Region(iRow,(short)0,iRow,(short)(iMaxCol-1)));  
27           
28         ByteArrayOutputStream os = new ByteArrayOutputStream();  
29           
30         try{  
31             wb.write(os);  
32         }catch(IOException e){  
33             e.printStackTrace();  
34             //return null;  
35         }  
36           
37         byte[] xls = os.toByteArray();  
38           
39         File file = new File("test01.xls");  
40         OutputStream out = null;  
41         try {  
42              out = new FileOutputStream(file);  
43              try {  
44                 out.write(xls);  
45             } catch (IOException e) {  
46                 // TODO Auto-generated catch block  
47                 e.printStackTrace();  
48             }  
49         } catch (FileNotFoundException e1) {  
50             // TODO Auto-generated catch block  
51             e1.printStackTrace();  
52         }  
53           
54           
55     }  

 这里补上相关的jar包:jxl.jar, poi.jar   的下载地址:

http://download.csdn.net/download/kuangfengbuyi/4658127

三、Excel导入到数据库

1、添加POI jar包到项目的lib目录下-
2、Excel文件目录:d://excel.xls-
3、数据库字段为:num1 num2 num3 num4 num5 num6-
4、数据库名:blog-
5、表名:test-
6、编写类:连接mysql的字符串方法、插入的方法、实体类--

 1 import java.io.FileInputStream;-
 2 import java.io.FileNotFoundException;-
 3 import java.io.IOException;-
 4 import org.apache.commons.logging.Log;-
 5 import org.apache.commons.logging.LogFactory;-
 6 import org.apache.poi.hssf.usermodel.HSSFCell;-
 7 import org.apache.poi.hssf.usermodel.HSSFRow;-
 8 import org.apache.poi.hssf.usermodel.HSSFSheet;-
 9 import org.apache.poi.hssf.usermodel.HSSFWorkbook;-
10 
11 public class TestExcel {-
12       //记录类的输出信息-
13       static Log log = LogFactory.getLog(TestExcel.class); -
14       //获取Excel文档的路径-
15       public static String filePath = "D://excel.xls";-
16       public static void main(String[] args) {-
17             try {-
18                   // 创建对Excel工作簿文件的引用-
19                   HSSFWorkbook wookbook = new HSSFWorkbook(new FileInputStream(filePath));- 
20                   // 在Excel文档中,第一张工作表的缺省索引是0
21                   // 其语句为:HSSFSheet sheet = workbook.getSheetAt(0);-
22                   HSSFSheet sheet = wookbook.getSheet("Sheet1");-
23                   //获取到Excel文件中的所有行数-
24                   int rows = sheet.getPhysicalNumberOfRows();
25                   //遍历行-
26                   for (int i = 0; i < rows; i++) {-
27                         // 读取左上端单元格-
28                         HSSFRow row = sheet.getRow(i);-
29                         // 行不为空-
30                         if (row != null) {-
31                               //获取到Excel文件中的所有的列-
32                               int cells = row.getPhysicalNumberOfCells();-
33                               String valuehttp://www.mamicode.com/= "";     -
34                               //遍历列-
35                               for (int j = 0; j < cells; j++) {-
36                                     //获取到列的值-
37                                     HSSFCell cell = row.getCell(j);-
38                                     if (cell != null) {-
39                                           switch (cell.getCellType()) {-
40                                                 case HSSFCell.CELL_TYPE_FORMULA:-
41                                                 break;-
42                                                 case HSSFCell.CELL_TYPE_NUMERIC:-
43                                                       value += cell.getNumericCellValue() + ",";        -
44                                                 break;  -
45                                                 case HSSFCell.CELL_TYPE_STRING:-
46                                                       value += cell.getStringCellValue() + ",";-
47                                                 break;-
48                                                 default:-
49                                                       value += "0";-
50                                                 break;-
51                                     }-
52                               }      
53                         }-
54                         // 将数据插入到mysql数据库中-
55                         String[] val = value.split(",");-
56                         TestEntity entity = new TestEntity();-
57                         entity.setNum1(val[0]);-
58                         entity.setNum2(val[1]);-
59                         entity.setNum3(val[2]);-
60                         entity.setNum4(val[3]);-
61                         entity.setNum5(val[4]);-
62                         entity.setNum6(val[5]);-
63                         TestMethod method = new TestMethod();-
64                         method.Add(entity);-
65                   }-
66              }-
67       } catch (FileNotFoundException e) {-
68             e.printStackTrace();-
69       } catch (IOException e) {-
70             e.printStackTrace();-
71       }-
72    }-
73 }-

 

java生成Excel两种方式