背景

本人在上家公司有段時間負責報表的事情，頻繁的需要使用excel的匯入匯出，於是寫了一套公用程式碼，

寫作時間是2015年6月，現在有空分享出來，供大家參考

特性

4、報錯機制，報錯提示批量、準確具體行列

匯出模板具有以下特性：

1、可生成序列號

2、可指定列長度

基礎類

AbstractCellValueVerify：抽象列值校驗器

AbstractCellVerify：抽象列校驗器，格式化和校驗列值，可根據建構函式拓展，比較校驗是否允許為null。AbstractCellValueVerify和AbstractCellVerify關係是AbstractCellVerify使用到了AbstractCellValueVerify。
AbstractVerifyBuidler：抽象校驗構建器，用來構建實體對應所有列的校驗器


下面都是具體格式的列校驗器，對列格式化為對應格式，並對列值進行校驗
BigDecimalVerify、DateTimeVerify、DoubleVerify、IntegerVerify、StringToIntegerVerify、StringVerify。
特殊說明一下的是StringToIntegerVerify：針對字串轉int型別的情況，比如借款型別


ParseSheetCallback：解析Sheet回撥函式

匯入示例：

/**
 * 匯入使用者校驗類
 * @author Administrator
 *
 */
public class MemberVerifyBuilder extends AbstractVerifyBuidler {

	private static MemberVerifyBuilder builder = new MemberVerifyBuilder();

	public static MemberVerifyBuilder getInstance() {
		return builder;
	}

	/**
	 * 定義列校驗實體：提取的欄位、提取列、校驗規則
	 */
	private MemberVerifyBuilder() {
		cellEntitys.add(new CellVerifyEntity("name", "A", new StringVerify("姓名", true)));
		cellEntitys.add(new CellVerifyEntity("age", "B", new IntegerVerify("年齡", true)));
		cellEntitys.add(new CellVerifyEntity("country", "D", new StringToIntegerVerify("國家",
				new AbstractCellValueVerify() {
					@Override
					public Object verify(Object fileValue) {
						// TODO 轉換：從excel中得到string轉成需要的integer
						return 1;
					}
				}, true)));
		cellEntitys.add(new CellVerifyEntity("date", "F", new DateTimeVerify("建立日期", "yyyy/MM/dd",
				true)));

		// 必須呼叫
		super.init();
	}
}
 

public class MainClass {

	public static void main(String[] args) throws Exception {
		parseSheet();
		parseSheetWithCallback();
	}
	
	/**
	 * 解析excel
	 * @throws Exception
	 */
	public static void parseSheet() throws Exception {
		Workbook wb = WorkbookFactory.create(new FileInputStream("src/test/java/example/imp/import.xlsx"));
		Sheet sheet = wb.getSheetAt(0);
		// parseSheet
		List<Member> list = ExcelImportUtils.parseSheet(
				Member.class, MemberVerifyBuilder.getInstance(), sheet, 1);
		System.out.println(JSON.toJSONString(list));
	}
	
	/**
	 * 解析excel帶回調函式：做一些額外欄位填充
	 * @throws Exception
	 */
	public static void parseSheetWithCallback() throws Exception {
		Workbook wb = WorkbookFactory.create(new FileInputStream("src/test/java/example/imp/import.xlsx"));
		Sheet sheet = wb.getSheetAt(0);
		final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		// parseSheet
		List<Member> list = ExcelImportUtils.parseSheet(
				Member.class, MemberVerifyBuilder.getInstance(), sheet, 1, new ParseSheetCallback<Member>() {
					@Override
					public void callback(Member t, int rowNum) throws Exception {
						t.setDateDesc(sdf.format(t.getDate()));
					}
				});
		System.out.println(JSON.toJSONString(list));
	}
}
 

匯入示例：

public class MainClass {
	
	/**
	 * 定義：excel標題，提取資料的欄位，佔用列長度
	 */
	private static final Object[][] fields = new Object[][]{
		{"姓名","name",POIConstant.TIME},
		{"年齡","age",POIConstant.NUMBER},
		{"國家","country",POIConstant.NAME},
		{"建立日期","dateDesc",POIConstant.TIME},
	};
	
	private static final Object[][] fieldsWithNum = new Object[][]{
		{"序號","",POIConstant.NUMBER},
		{"姓名","name",POIConstant.TIME},
		{"年齡","age",POIConstant.NUMBER},
		{"國家","country",POIConstant.NAME},
		{"建立日期","dateDesc",POIConstant.TIME},
	};
	
	public static void main(String[] args) throws Exception {
		exportBean();
		exportBeanWithNum();
		exportMap();
	}
	
	/**
	 * 1、匯出物件
	 * @throws Exception
	 */
	public static void exportBean() throws Exception{
		List<Member> list = new ArrayList<>();
		list.add(new Member("張三", 28, 1, "2016-10-19"));
		list.add(new Member("李四", 25, 2, "2016-10-19"));
		Workbook bean = ExcelExportUtils.createWorkbook(list, fields);
		bean.write(new FileOutputStream("src/test/java/example/exp/exportBean.xlsx"));
	}
	
	/**
	 * 2、匯出物件帶序列號
	 * @throws Exception
	 */
	public static void exportBeanWithNum() throws Exception{
		List<Member> list = new ArrayList<>();
		list.add(new Member("張三", 28, 1, "2016-10-19"));
		list.add(new Member("李四", 25, 2, "2016-10-19"));
		Workbook bean = ExcelExportUtils.createWorkbook(list, fieldsWithNum, true);
		bean.write(new FileOutputStream("src/test/java/example/exp/exportBeanWithNum.xlsx"));
	}
	
	/**
	 * 匯出map
	 * @throws Exception
	 */
	public static void exportMap() throws Exception{
		List<Map<String, Object>> list = new ArrayList<>();
		Map<String, Object> map = new HashMap<>();
		map.put("name", "張三");
		map.put("age", 28);
		map.put("country", 1);
		map.put("dateDesc", "2016-10-19");
		list.add(map);
		map = new HashMap<>();
		map.put("name", "張三");
		map.put("age", 28);
		map.put("country", 1);
		map.put("dateDesc", "2016-10-19");
		list.add(map);
		Workbook bean = ExcelExportUtils.createWorkbook(list, fields);
		bean.write(new FileOutputStream("src/test/java/example/exp/exportMap.xlsx"));
	}
}

原始碼下載

後續