1 通过行列获取区域
/**
* 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;
}
2 删除区域
sheet.removeMergedRegion(getMergedRegionIndex(sheet, 1, 1));
3 清除行
sheet.removeRow(sheet.getRow(0));
4 删除行(注意:删除行前,须删除区域Region)
// 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);
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;
}
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);
}
6 classLoader顺序
public static void getClassLoader() {
System.out.println(ClassLoader.getSystemClassLoader());
System.out.println(ClassLoader.getSystemClassLoader().getParent());
System.out.println(ClassLoader.getSystemClassLoader().getParent().getParent());
}
7 汉字排序
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() {
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() {
public int compare(Date arg0, Date arg1) {
return Collator.getInstance(Locale.CHINA).compare(arg0.getTime(), arg0.getTime());
}
});
System.out.println(list);
}
8 文件拷贝
public static void fileUpload(File file, String filename) {
try {
file.renameTo(new File(filename));
} catch (Exception e) {
e.printStackTrace();
}
}