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README
Apache-2.0

excel-spring-boot-starter

此项目底层基于 Easyexcel 实现 Excel 的读写。

EasyExcel是一个基于Java的简单、省内存的读写Excel的开源项目。在尽可能节约内存的情况下支持读写百M的Excel。 64M内存1分钟内读取75M(46W行25列)的Excel,当然还有急速模式能更快,但是内存占用会在100M多一点

依赖引用

  • 项目已上传至 maven 仓库,直接引入即可使用
版本 支持
3.0.0 适配 SpringBoot3.x
1.2.7 适配 SpringBoot2.x
<dependency>
  <groupId>com.pig4cloud.excel</groupId>
  <artifactId>excel-spring-boot-starter</artifactId>
  <version>${lastVersion}</version>
</dependency>

导入 Excel

  • 接口类定义List 接受表格对应的数据 使用 @RequestExcel 标记
@PostMapping("/upload")
public void upload(@RequestExcel List<DemoData> dataList, BindingResult bindingResult) {
  // JSR 303 校验通用校验获取失败的数据
  List<ErrorMessage> errorMessageList = (List<ErrorMessage>) bindingResult.getTarget();
}
  • 实体声明
@Data
public class Demo {
  @ExcelProperty(index = 0)
  private String username;

  @ExcelProperty(index = 1)
  private String password;
}
  • 测试表格

导出 Excel

只需要在 Controller 层返回 List 并增加 @ResponseExcel注解即可

@Documented
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface ResponseExcel {
  String name() default "";
  ExcelTypeEnum suffix() default ExcelTypeEnum.XLSX;
  String password() default "";
  Sheet[] sheets() default @Sheet(sheetName = "sheet1");
  boolean inMemory() default false;
  String template() default "";
  String[] include() default {};
  String[] exclude() default {};
  Class<? extends WriteHandler>[] writeHandler() default {};
  Class<? extends Converter>[] converter() default {};
  Class<? extends HeadGenerator> headGenerator() default HeadGenerator.class;
}

基础用法

  • 返回单 sheet, 全部字段导出
@ResponseExcel(name = "test", sheets = @Sheet(sheetName = "testSheet1"))
@GetMapping("/e1")
public List<DemoData> e1() {
    List<DemoData> dataList = new ArrayList<>();
    for (int i = 0; i < 100; i++) {
        DemoData data = new DemoData();
        data.setUsername("tr1" + i);
        data.setPassword("tr2" + i);
        dataList.add(data);
    }
    return dataList;
}

// 实体对象
@Data
public class DemoData {
	private String username;
	private String password;
}

  • 自定义字段属性
@Data
public class DemoData {
    @ColumnWidth(50)  // 定义宽度
	@ExcelProperty("用户名") // 定义列名称
    @ContentStyle(fillPatternType = FillPatternType.SOLID_FOREGROUND, fillForegroundColor = 40)
	private String username;
	@ExcelProperty("密码")
	private String password;
}

  • 忽略部分字段
@Data
public class DemoData {
    @ColumnWidth(50)  // 定义宽度
	@ExcelProperty("用户名") // 定义列名称
    @ContentStyle(fillPatternType = FillPatternType.SOLID_FOREGROUND, fillForegroundColor = 40)
	private String username;
	@ExcelIgnore // 忽略这个字段
	private String password;
}

导出并加密

@ResponseExcel(name = "lengleng", password = "lengleng")
@GetMapping("/e1")
public List<DemoData> e1() {
    return list();
}

导出多sheet

@ResponseExcel(name = "lengleng", sheets = {
    @Sheet(sheetName = "第一个Sheet"), 
    @Sheet(sheetName = "第二个sheet")
})
@GetMapping("/e1")
public List<List<DemoData>> e1() {
    List<List<DemoData>> lists = new ArrayList<>();
    lists.add(list());
    lists.add(list());
    return lists;
}

导出不同的 Sheet

这里两个 sheet 导出不同类型的对象,只导出 DemoData 中的 username 属性,且将 testData 中的 number 属性排除。

@Controller
@RequestMapping("public/excel")
public class ExportMultiSheetController {

	@ResponseExcel(name = "不同Sheet的导出", sheets = {
			@Sheet(sheetName = "demoData", includes = {"username"}),
			@Sheet(sheetName = "testData", excludes = {"number"})
	})
	@GetMapping("/different-sheet")
	public List<List> multiDifferent() {
		List<List> lists = new ArrayList<>();
		lists.add(demoDatalist());
		lists.add(testDatalist());
		return lists;
	}

	private List<DemoData> demoDatalist(){
		List<DemoData> dataList = new ArrayList<>();
		for (int i = 0; i < 100; i++) {
			DemoData data = new DemoData();
			data.setUsername("tr1" + i);
			data.setPassword("tr2" + i);
			dataList.add(data);
		}
		return dataList;
	}

	private List<TestData> testDatalist(){
		List<TestData> dataList = new ArrayList<>();
		for (int i = 0; i < 100; i++) {
			TestData data = new TestData();
			data.setStr("str" + i);
			data.setNumber(i);
			data.setLocalDateTime(LocalDateTime.now());
			dataList.add(data);
		}
		return dataList;
	}

	// 实体对象
	@Data
	public static class DemoData {
		private String username;
		private String password;
	}

	@Data
	public static class TestData {
		private String str;
		private Integer number;
		@ColumnWidth(50)  // 定义宽度
		private LocalDateTime localDateTime;
	}

}

导出不同的 Sheet

导出并自定义头信息

测试实体类:

@Data
public class SimpleData {
    @ExcelProperty("字符串标题")
    private String string;
    @ExcelProperty("日期标题")
    private Date date;
    @ExcelProperty("数字标题")
    private Integer number;
    // 忽略
    @ExcelIgnore
    private String ignore;
}

自定义头信息生成器

注意需要实现 HeadGenerator 接口,且注册为一个 spring bean.

@Component
public class SimpleDataHeadGenerator implements HeadGenerator {
    @Override
    public HeadMeta head(Class<?> clazz) {
        HeadMeta headMeta = new HeadMeta();
        headMeta.setHead(simpleDataHead());
        // 排除 number 属性
        headMeta.setIgnoreHeadFields(new HashSet<>(Collections.singletonList("number")));
        return headMeta;
    }

    private List<List<String>> simpleDataHead() {
        List<List<String>> list = new ArrayList<>();
        List<String> head0 = new ArrayList<>();
        head0.add("自定义字符串标题" + System.currentTimeMillis());
        List<String> head1 = new ArrayList<>();
        head1.add("自定义日期标题" + System.currentTimeMillis());
        list.add(head0);
        list.add(head1);
        return list;
    }
}

该头生成器,将固定返回 自定义字符串标题 和 自定义日期标题 两列头信息,实际使用时可根据业务动态处理,方便在一些权限控制时动态修改或者增删列头。

测试代码:

@RequestMapping("/head")
@RestController
public class ExcelHeadTestController {

    @ResponseExcel(name = "customHead", headGenerator = SimpleDataHeadGenerator.class)
    @GetMapping
    public List<SimpleData> multi() {
        List<SimpleData> list = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            SimpleData simpleData = new SimpleData();
            simpleData.setString("str" + i);
            simpleData.setNumber(i);
            simpleData.setDate(new Date());
            list.add(simpleData);
        }
        return list;
    }
}

自定义头信息

国际化的导入导出

国际化配置基于 Spring 的 MessageSource,开启国际化时,spring 容器中必须有一个 MessageSource 的 Bean。

具体 Spring

的国际化使用这里不再展开,想要了解的可以参看官方文档 Spring MessageSource 使用

以及 SpringBoot 国际化配置

首先在 resource 下,新建国际化配置文件

  • messages.properties

    DemoData.username=Username
    DemoData.age=Age
  • messages_en_US.properties

    DemoData.username=Username
    DemoData.age=Age
  • messages_zh_CN.properties

    DemoData.username=用户名
    DemoData.age=年龄

测试类的注解信息上,使用 {} 标记配置文件中的 key

@Data
public class DemoData {
	@ExcelProperty(value = "{DemoData.username}", index = 0)
	private String username;
	@ExcelProperty(value = "{DemoData.age}", index = 1)
	private Integer age;
}

**导出注解上设置 i18nHeader=true **

	@ResponseExcel(name = "i18nExport", i18nHeader = true)
	@GetMapping("excelExport")
	public List<DemoData> i18nExport() {
		List<DemoData> list = new ArrayList<>();
		for (int i = 0; i < 10; i++) {
			DemoData demoData = new DemoData();
			demoData.setUsername("username:" + i);
			demoData.setAge(i);
			list.add(demoData);
		}
		return list;
	}

使用 Postman 测试导出

请求头上使用 Accept-Language 指定当前语言区域,中文是 zh-CN, 英文是 en-US

SpringBoot 的国际化默认会读取请求头中的 Accept-Language 进行判断当前区域,可以通过定制 LocaleResolver 替换这一默认行为

导出效果

导出效果

导入 controller

注意,这里导入接受的对象如果和导出是同一个的话,由于列名是国际化配置的占位符,无法和实际上传文件进行对应,所以需要给该对象的属性指定 index,导入文件根据 index 进行数据映射。

当然,也可以使用额外的导入类来接收导入信息。

	@PostMapping("i18n")
	@ResponseBody
	public List<DemoData> importExcel(@RequestExcel List<DemoData> list) {
		return list;
	}
  • 导入获取excel 行号,实体属性增加 @ExcelLine 注解即可
/**
 * 导入时候回显行号
 */
@ExcelLine
@ExcelIgnore
private Long lineNum;

使用 Postman 测试导入

添加全局自定义转换器(Converter)

0.0.7 版本开始添加了全局自定义转换器注入的功能,你只需要将自定义的 Converter 注册成 Spring bean 即可。

示例代码如下(对 set 类型转换):

@Data
public class TestModel {
	@ExcelProperty("名称集合")
	private Set<String> nameSet;
}

/**
 * 集合转换器
 *
 * @author L.cm
 */
@Component
public class SetConverter implements Converter<Set<?>> {
	private final ConversionService conversionService;

	SetConverter() {
		this.conversionService = DefaultConversionService.getSharedInstance();
	}

	@Override
	public Class<?> supportJavaTypeKey() {
		return Set.class;
	}

	@Override
	public CellDataTypeEnum supportExcelTypeKey() {
		return CellDataTypeEnum.STRING;
	}

	@Override
	public Set<?> convertToJavaData(CellData cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) {
		String[] value = StringUtils.delimitedListToStringArray(cellData.getStringValue(), ",");
		return (Set<?>) conversionService.convert(value, TypeDescriptor.valueOf(String[].class), new TypeDescriptor(contentProperty.getField()));
	}

	@Override
	public CellData<String> convertToExcelData(Set<?> value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) {
		return new CellData<>(StringUtils.collectionToCommaDelimitedString(value));
	}

}

高级用法模板导出

@ResponseExcel(name = "模板测试excel", sheet = "sheetName",template = "example.xlsx")
@GetMapping("/e1")
public List<DemoData> e1() {
    return list();
}

其他用法

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EasyExcel spring boot 封装 展开 收起
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