POI的一些操作 获取、删除区域Region 删除多行_JAVA_编程开发_程序员俱乐部

1 通过行列获取区域

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class="java" name="code">	/**
	 * 获取区域 Region
	 * @param sheet
	 * @param row
	 * @param column
	 * @return
	 */
	public static int getMergedRegionIndex(Sheet sheet, int row, int column) { 
		int sheetMergeCount = sheet.getNumMergedRegions(); 

		for (int i = 0; i < sheetMergeCount; i++) { 
			CellRangeAddress ca = sheet.getMergedRegion(i); 
			int firstColumn = ca.getFirstColumn(); 
			int lastColumn = ca.getLastColumn(); 
			int firstRow = ca.getFirstRow(); 
			int lastRow = ca.getLastRow(); 
	
			if (row >= firstRow && row <= lastRow) { 
				if (column >= firstColumn && column <= lastColumn) { 
					return i; 
				} 
			} 
		} 

		return 0;
	}

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2 删除区域

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sheet.removeMergedRegion(getMergedRegionIndex(sheet, 1, 1));

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3 清除行

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sheet.removeRow(sheet.getRow(0));

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4 删除行（注意：删除行前，须删除区域Region）

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// 第1个参数  开始行
// 第2个参数  结束行
// 第3个参数  覆盖行数
// 第4个参数  是否带原格式copyRowHeight 
// 第5个参数  是否重设区域resetOriginalRowHeight 
sheet.shiftRows(8, 8, -3, true, true);

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try {
        	InputStream is = null;
            Workbook book = null;
            is = new FileInputStream("D:\\test.xls");
            book = new HSSFWorkbook(is);
            
            Sheet sheet = book.getSheetAt(0);
            sheet.shiftRows(1, 1, -1);
            
            File f = new File("d:\\1.xls");
            FileOutputStream out = new FileOutputStream(f);
            book.write(out);
            
            out.close();
            is.close();
        } catch (IOException e) {
            return;
        }

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5 获取操作系统

	public static void getProperties() {
		Properties prop = System.getProperties();
		String os = prop.getProperty("os.name");
		System.out.println(os);
	}

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?6 classLoader顺序

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	public static void getClassLoader() {
		System.out.println(ClassLoader.getSystemClassLoader());
		System.out.println(ClassLoader.getSystemClassLoader().getParent());
		System.out.println(ClassLoader.getSystemClassLoader().getParent().getParent());
	}

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7 汉字排序

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public static void sortMap() {
		List list = new ArrayList();
		ProductPos p = new ProductPos();
		p.setPosId("2");
		list.add(p);
		
		p = new ProductPos();
		p.setPosId("张三");
		list.add(p);
		
		p = new ProductPos();
		p.setPosId("王武");
		list.add(p);
		
		System.out.println(list);
		
		Collections.sort(list, new Comparator<ProductPos>() {
			 public int compare(ProductPos arg0, ProductPos arg1) {
	                return arg0.getPosId().compareTo(arg1.getPosId());
	            }
		});
		System.out.println(list);
		
		//Collections.sort(list, (RuleBasedCollator )Collator.getInstance(Locale.CHINA));
		
		Collections.sort(list, new Comparator<Date>() {
			 public int compare(Date arg0, Date arg1) {
				 return Collator.getInstance(Locale.CHINA).compare(arg0.getTime(), arg0.getTime());
	            }
		});
		System.out.println(list);
		
	}

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8 文件拷贝

public static void fileUpload(File file, String filename) {
		try {
			file.renameTo(new File(filename));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

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