1. public static void main(String[] args) {  
2.   
3.         InputStream is = null;  
4.         Workbook book = null;  
5.         try {  
6.             is = new FileInputStream("D:\\test.xls");  
7.             book = new HSSFWorkbook(is);  
8.               
9.             Sheet sheet = book.getSheetAt(0);  
10.               
11.             for(int i = 0; i <= 10; i ++) {   
12.                 Row row = sheet.getRow(i);  
13.                 int enterCnt = 0;  
14.                 int colIdxOfMaxCnt = 1;  
15.                 for(int j = 0; j <= 10; j ++) {  
16.                     int rwsTemp = row.getCell(j).toString().split("\n").length;  
17.                     if (rwsTemp > enterCnt) {  
18.                         enterCnt = rwsTemp;  
19.                         colIdxOfMaxCnt = j;  
20.                     }  
21.                 }  
22.                 System.out.println(colIdxOfMaxCnt + "列的行数：" + enterCnt);  
23.                 row.setHeight((short)(enterCnt * 228));  
24.             }  
25.               
26.             File f = new File("D:\\test.xls");  
27.             FileOutputStream out = new FileOutputStream(f);  
28.             book.write(out);  
29.               
30.             out.close();  
31.             is.close();  
32.         } catch (IOException e) {  
33.             return;  
34.         }  
35. }  

java POI excel 单元个的内容 自适应行高