maven使用方式

<!-- excel导入导出 -->
<dependency>
    <groupId>com.github.stupdit1t</groupId>
    <artifactId>poi-excel</artifactId>
    <version>1.7</version>
</dependency>

// 0.准备数据
List<ProjectEvaluate> listData = new ArrayList<>();

// 1.表头设置,可以对应excel设计表头，一看就懂
Map<String, String> headerRules = new HashMap<>();
headerRules.put("1,1,A,K", "项目资源统计");
headerRules.put("2,3,A,A", "序号");
headerRules.put("2,2,B,E", "基本信息");
headerRules.put("3,3,B,B", "项目名称");
headerRules.put("3,3,C,C", "所属区域");
headerRules.put("3,3,D,D", "省份");
headerRules.put("3,3,E,E", "市");
headerRules.put("2,3,F,F", "项目所属人");
headerRules.put("2,3,G,G", "市项目领导人");
headerRules.put("2,2,H,I", "分值");
headerRules.put("3,3,H,H", "得分");
headerRules.put("3,3,I,I", "平均分");
headerRules.put("2,3,J,J", "创建时间");
headerRules.put("2,3,K,K", "项目图片");

// 2.尾部设置，一般可以用来设计合计栏
HashMap<String, String> footerRules = new HashMap<>();
footerRules.put("1,2,A,C", "合计:");
footerRules.put("1,2,D,K", "=SUM(H4:H13)");

// 3.导出hearder对应的属性设置
Column[] column = {
        Column.field("projectName"),
        // 4.1设置此列宽度为10
        Column.field("areaName").width(10),
        // 4.2设置此列下拉框数据
        Column.field("province").width(5).dorpDown(new String[]{"陕西省", "山西省", "辽宁省"}),
        // 4.3设置此列水平居右
        Column.field("city").align(HorizontalAlignment.RIGHT),
        // 4.4 设置此列垂直居上
        Column.field("people").valign(VerticalAlignment.TOP),
        // 4.5 设置此列单元格 自定义校验 只能输入文本
        Column.field("leader").width(4).verifyCustom("VALUE(F3:F500)", "我是提示"),
        // 4.6设置此列单元格 整数 数据校验 ，同时设置背景色为棕色
        Column.field("scount").verifyIntNum("10~20").backColor(IndexedColors.BROWN),
        // 4.7设置此列单元格 浮点数 数据校验， 同时设置字体颜色红色
        Column.field("avg").verifyFloatNum("10.0~20.0").color(IndexedColors.RED),
        // 4.8设置此列单元格 日期 数据校验 ，同时宽度为20、限制用户表格输入、水平居中、垂直居中、背景色、字体颜色
        Column.field("createTime").width(20).verifyDate("2000-01-03 12:35~3000-05-06 23:23")
                .align(HorizontalAlignment.LEFT).valign(VerticalAlignment.CENTER)
                .backColor(IndexedColors.YELLOW).color(IndexedColors.GOLD),
        // 4.9项目图片, 只有该列是byte[], 自动变为图片
        Column.field("img")

};
// 4.导出规则定义
ExportRules exportRules = ExportRules.complexRule(column, headerRules)
        // 自动生成序号, 需要定义序号列
        .autoNum(true)
        // 尾部合计行定义
        .footerRules(footerRules)
        // 全局表格样式定义, 默认就是这个设置, 可自定义, 如果自定义则以自定义为主
        .globalStyle(DefaultCellStyleEnum.TITLE,DefaultCellStyleEnum.HEADER,DefaultCellStyleEnum.CELL)
        // 表格的大标题, ExportRules.simpleRule()简要表头模式才有用, ExportRules.complexRule()复杂规则不在这里定义,如果定义会报错
        .title("中国好项目")
        // 自定义sheet名字
        .sheetName("我的sheet");
// 5.执行导出到工作簿, 依次叔  $集合数据, $导出规则, $是否导出xlsx格式(导出文件名对应好), $导出回调处理
Workbook bean = ExcelUtils.createWorkbook(listData, exportRules, true, new ExportSheetCallback<ProjectEvaluate>() {
    @Override
    // 此处可处理后写入到Excel, 依次是  $字段名  $字段值  $行记录值  $cell单元格样式
    public Object callback(String fieldName, Object value, ProjectEvaluate projectEvaluate, Column customStyle) {
        return value;
    }
});
// 6.写出文件, 如果是web环境则写到servlet里
bean.write(new FileOutputStream("filePath"));

// 1.导出的hearder设置
List<Map<String, Object>> mapData = new ArrayList<>();
Map<String, Object> obj = new HashMap<>();
obj.put("name", "张三");
obj.put("age", 5);
mapData.add(obj);

// 2.导出hearder对应的字段设置，列宽设置
String[] hearder = {"姓名", "年龄"};
Column[] column = {
        Column.field("name"),
        Column.field("age"),
};
// 3.执行导出到工作簿
Workbook bean = ExcelUtils.createWorkbook(mapData, ExportRules.simpleRule(column, hearder), true);
// 4.写出文件
bean.write(new FileOutputStream(filePath);

// 0.数据准备
List<Student> complexData = new ArrayList<>();
for (int i = 0; i < 20; i++) {
    // 學生
    Student stu = new Student();
    // 學生所在的班級，用對象
    stu.setClassRoom(new ClassRoom("六班"));
    // 學生的更多信息，用map
    Map<String, Object> moreInfo = new HashMap<>();
    moreInfo.put("parent", new Parent("張無忌"));
    stu.setMoreInfo(moreInfo);
    stu.setName("张三");
    complexData.add(stu);
}

// 1.导出的hearder设置
String[] hearder = {"學生姓名", "所在班級", "所在學校", "更多父母姓名"};

// 2.导出hearder对应的字段设置，列宽设置
Column[] column = {
        Column.field("name"), 
        Column.field("classRoom.name"), 
        Column.field("classRoom.school.name"),
        Column.field("moreInfo.parent.age")
};

// 3.执行导出到工作簿
Workbook bean = ExcelUtils.createWorkbook(complexData, ExportRules.simpleRule(column, hearder).title("學生基本信息"), true);

// 4.写出文件
bean.write(new FileOutputStream(filePath));

// 0.准备数据
List<List<?>> moreSheetData = new ArrayList<>();

// 1.创建空的Book
Workbook emptyWorkbook = ExcelUtils.createEmptyWorkbook(true);

// 2.执行导出到工作簿. 1.项目数据  2.map数据  3.复杂对象数据
for (int i = 0; i < moreSheetData.size(); i++) {
    if (i == 0) {
        List<ProjectEvaluate> data1 = (ArrayList<ProjectEvaluate>) moreSheetData.get(i);
        // 1.导出的hearder设置
        String[] hearder = {"项目名称", "所属区域", "省份", "市", "项目所属人", "项目领导人", "得分", "平均分", "创建时间", "项目图片"};
        // 2.导出hearder对应的字段设置
        Column[] column = {
                Column.field("projectName"), 
                Column.field("areaName"), 
                Column.field("province"),
                Column.field("city"),
                Column.field("people"), 
                Column.field("leader"), 
                Column.field("scount"),
                Column.field("avg"), 
                Column.field("createTime"),
                // 项目图片
                Column.field("img")
        };
        ExcelUtils.fillBook(emptyWorkbook, data1, ExportRules.simpleRule(column, hearder).title("项目资源统计").sheetName("mysheet1").autoNum(true));
    }
    if (i == 1) {
        List<Map<String, Object>> data2 = (ArrayList<Map<String, Object>>) moreSheetData.get(i);
        // 1.导出的hearder设置
        String[] hearder = {"姓名", "年龄"};
        // 2.导出hearder对应的字段设置，列宽设置
        Column[] column = {
                Column.field("name"),
                Column.field("age")
        };
        ExcelUtils.fillBook(emptyWorkbook, data2, ExportRules.simpleRule(column, hearder).sheetName("mysheet2"));
    }

    if (i == 2) {
        List<Student> data3 = (ArrayList<Student>) moreSheetData.get(i);
        // 1.导出的hearder设置
        String[] hearder = {"學生姓名", "所在班級", "所在學校", "更多父母姓名"};
        // 2.导出hearder对应的字段设置，列宽设置
        Column[] column = {
                Column.field("name"), 
                Column.field("classRoom.name"), 
                Column.field("classRoom.school.name"),
                Column.field("moreInfo.parent.name")
        };
        // 3.执行导出到工作簿
        ExcelUtils.fillBook(emptyWorkbook, data3, ExportRules.simpleRule(column, hearder).title("學生基本信息"));
    }

}
// 4.写出文件
emptyWorkbook.write(new FileOutputStream(filePath));

// 0.数据准备
List<Map<String, Object>> mapData = new ArrayList<>();
Map<String, Object> obj = new HashMap<>();
obj.put("name", "张三");
obj.put("age", 5);
mapData.add(obj);

// 1.导出的hearder设置
String[] hearder = {"姓名", "年龄"};

// 2.导出hearder对应的字段设置，列宽设置
Column[] column = {
        Column.field("name"),
        Column.field("age"),
};

// 3.执行导出到工作簿
Workbook bigWorkbook = ExcelUtils.createBigWorkbook();
ExcelUtils.fillBook(bigWorkbook, mapData, ExportRules.simpleRule(column, hearder));

// 4.写出文件
bigWorkbook.write(new FileOutputStream(filePath);

 // 1.导出的hearder设置
String[] hearder = {"宝宝姓名", "宝宝昵称", "家长姓名", "手机号码", "宝宝生日", "月龄", "宝宝性别", "来源渠道", "市场人员", "咨询顾问", "客服顾问",
    "分配校区", "备注"};

// 2.导出hearder对应的字段设置，列宽设置
Column[] column = {Column.field("宝宝姓名"), Column.field("宝宝昵称"), Column.field("家长姓名"),
    Column.field("手机号码").verifyText("11~11", "请输入11位的手机号码！"),
    Column.field("宝宝生日").verifyDate("2000-01-01~3000-12-31"),
    Column.field("月龄").width(4).verifyCustom("VALUE(F3:F6000)", "月齡格式：如1年2个月则输入14"),
    Column.field("宝宝性别").dorpDown(new String[]{"男", "女"}),
    Column.field("来源渠道").width(12).dorpDown(new String[]{"品推", "市场"}),
    Column.field("市场人员").width(6).dorpDown(new String[]{"张三", "李四"}),
    Column.field("咨询顾问").width(6).dorpDown(new String[]{"张三", "李四"}),
    Column.field("客服顾问").width(6).dorpDown(new String[]{"大唐", "银泰"}),
    Column.field("分配校区").width(6).dorpDown(new String[]{"大唐", "银泰"}), Column.field("备注")};

// 3.执行导出到工作簿
Workbook bean = ExcelUtils.createWorkbook(Collections.emptyList(), ExportRules.simpleRule(column, hearder), true);

// 4.写出文件
bean.write(new FileOutputStream(filePath));

Map<String,String> params = new HashMap<>();
params.put("a","今");
params.put("b","天");
params.put("c","好");
params.put("d","开");
params.put("e","心");
Workbook workbook = ExcelUtils.readExcelWrite(sourceFilePath, params);
workbook.write(new FileOutputStream(outFilePath));
workbook.close();

public class ProjectVerifyBuilder extends AbstractVerifyBuidler {

	private static ProjectVerifyBuilder builder = new ProjectVerifyBuilder();

	public static ProjectVerifyBuilder getInstance() {
		return builder;
	}

	/**
	 * 定义列校验实体：提取的字段、提取列、校验规则
	 */
    @Override
    protected List<CellVerifyEntity> buildRule() {
        List<CellVerifyEntity> cellEntitys = new ArrayList<>();
		cellEntitys.add(new CellVerifyEntity("projectName", "B", new StringVerify("项目名称", true)));
		cellEntitys.add(new CellVerifyEntity("areaName", "C", new StringVerify("所属区域", true)));
		cellEntitys.add(new CellVerifyEntity("province", "D", new StringVerify("省份", true)));
		cellEntitys.add(new CellVerifyEntity("city", "E", new StringVerify("市", true)));
		cellEntitys.add(new CellVerifyEntity("people", "F", new StringVerify("项目所属人", true)));
		cellEntitys.add(new CellVerifyEntity("leader", "G", new StringVerify("项目领导人", true)));
		cellEntitys.add(new CellVerifyEntity("scount", "H", new IntegerVerify("总分", true)));
		cellEntitys.add(new CellVerifyEntity("avg", "I", new DoubleVerify("历史平均分", true)));
		cellEntitys.add(new CellVerifyEntity("createTime", "J", new DateTimeVerify("创建时间", "yyyy-MM-dd HH:mm", true)));
		cellEntitys.add(new CellVerifyEntity("img", "K", new ImgVerify("图片", false)));
        retrun cellEntitys;
	}
}

// 1.获取源文件
Workbook wb = WorkbookFactory.create(new FileInputStream(filePath));
// 2.获取sheet0导入
Sheet sheet = wb.getSheetAt(0);
// 3.生成VO数据
//参数：1.生成VO的class类型;2.校验规则;3.导入的sheet;3.从第几行导入;4.尾部非数据行数量;5.导入每条数据的回调
ImportRspInfo<ProjectEvaluate> list = ExcelUtils.parseSheet(ProjectEvaluate.class, ProjectVerifyBuilder.getInstance(), sheet, 3, 2, (row, rowNum) -> {
	//1.此处可以完成更多的校验
	if(row.getAreaName() == "中青旅"){
	    throw new POIException("第"+rowNum+"行，区域名字不能为中青旅！");
	}
	//2.图片导入，再ProjectEvaluate定义类型为byte[]的属性就可以，ProjectVerifyBuilder定义ImgVerfiy校验列.就OK了
});
if (list.isSuccess()) {
	// 导入没有错误，打印数据
	System.out.println(JSON.toJSONString(list.getData()));
	//打印图片byte数组长度
	byte[] img = list.getData().get(0).getImg();
	System.out.println(img);
} else {
	// 导入有错误，打印输出错误
	System.out.println(list.getMessage());
}