General Excel Module to implement Excel Download simply and fast.
Excel Module uses annotation and reflections to render excel file.
You need to use @ExcelColumn to Object to be rendered in excel file.
See below example.
Here, only explain how to manage dependency with gradle.
See other build tool usage from Jitpack Hompage
allprojects {
repositories {
maven { url 'https://jitpack.io' }
}
}
// Use proper version
dependencies {
implementation('com.github.lannstark:excel-download:0.1.1')
}
// In ExcelDeto
// Rendered Field Order is same as Dto field order
public class ExcelDto {
// Annotation Case 1. no headerStyle and bodyStyle
@ExcelColumn(headerName = "User Name")
private String name;
// Annotation Case 2. use not default style, but use defined style
@ExcelColumn(headerName = "User Age",
headerStyle = @ExcelColumnStyle(excelCellStyleClass = DefaultExcelCellStyle.class, enumName = "BLUE_HEADER")
)
private int age;
// Annotation Case 3. You can also configure bodyStyle style
@ExcelColumn(headerName = "Happy BirthDay",
bodyStyle = @ExcelColumnStyle(excelCellStyleClass = DefaultExcelCellStyle.class, enumName = "BODY")
)
private LocalDate birthDay;
}If you want to config default style in class, you should use @DefaultHeaderStyle or @DefaultBodyStyle. This style will be applied to all fields having not field style in this class.
@DefaultHeaderStyle(
style = @ExcelColumnStyle(excelCellStyleClass = DefaultExcelCellStyle.class, enumName = "BLUE_HEADER")
)
@DefaultBodyStyle(
style = @ExcelColumnStyle(excelCellStyleClass = DefaultExcelCellStyle.class, enumName = "BODY")
)
public class ExcelDto {
private String name;
private int age;
private LocalDate birthDay;
}Additionally, There is customizing use case, not pre-defined excel cell style in DefaultExcelCellStyle.
See Customizing section
// In Controller
@RestController
public class Controller {
@GetMapping("/any-url")
public void methodName(RequestDto requestDto, HttpServletResponse response) throws IOException {
// If you specify response type when you use axios,
// you don't need to set HttpServletResponse contenttype. See #1 in Front with axios section
response.setContentType("application/vnd.ms-excel");
List<ExcelDto> excelDtos = someService.getRenderedData(requestDto);
ExcelFile excelFile = new OneSheetExcelFile<>(excelDtos, ExcelDto.class);
excelFile.write(response.getOutputStream());
}
}axios({
method: 'GET',
url: 'server-url',
responseType: 'blob' // MUST NEED
})
.then(response => {
// #1 Here, I designate type with response header, however, you can specify 'application/vnd.ms-excel'
const url
= window.URL.createObjectURL(new Blobk([response.data], {type : response.headers['content-type']}));
const link = document.createElement('a');
link.href = url;
link.setAttribute('download', 'ExcelFile.xlsx');
document.body.appendChild(link);
link.click();
});You can create custom ExcelCellStyle with Class or Enum
If you use Class, you don't need to designate enumName of @ExcelColumnStyle
public class BlueHeaderStyle implements ExcelCellStyle {
@Override
public void apply(CellStyle cellStyle) {
// Do anything you want to change style
cellStyle.setBlaBla();
}
} For convenient custom style class, we provide template style class, CustomExcelCellStyle You can set
- cell color
- 4-side borders type
- cell contents align Other features will be updated gradually.
public class BlueHeaderStyle extends CustomExcelCellStyle {
@Override
public void configure(ExcelCellStyleConfigurer configurer) {
configurer.foregroundColor(223, 235, 246)
.excelBorders(DefaultExcelBorders.newInstance(ExcelBorderStyle.THIN))
.excelAlign(DefaultExcelAlign.CENTER_CENTER);
}
}@DefaultHeaderStyle(
style = @ExcelColumnStyle(excelCellStyleClass = BlueHeaderStyle.class)
)
public class ExcelDto {
private String field1;
}If you use Enum, you have to specify enumName of @ExcelColumnStyle
public enum CustomCellStyle implements ExcelCellStyle {
CUSTOM_HEADER(field1, field2);
// Whatever fields you need to configure cell style
private final String field1;
private final int field2;
@Override
public void apply(CellStyle cellStyle) {
// Do anything you want to change style with defined enum fields.
cellStyle.setBlaBla();
}
}public class ExcelDto {
@ExcelColumn(headerName = "Field Header Title",
bodyStyle = @ExcelColumnStyle(excelCellStyleClass = CustomCellStyle.class, enumName = "CUSTOM_HEADER")
)
private String field1;
}- OneSheetExcelFile
- MultiSheetExcelFile
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