1、引入easypoi包
<!-- easypoi -->
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-base</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-web</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-annotation</artifactId>
<version>3.1.0</version>
</dependency>
2、创建poi工具类
public class PoiUtil {
public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
boolean isCreateHeader, HttpServletResponse response) {
ExportParams exportParams = new ExportParams(title, sheetName);
exportParams.setCreateHeadRows(isCreateHeader);
defaultExport(list, pojoClass, fileName, response, exportParams);
}
public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
HttpServletResponse response) {
defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
}
public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
defaultExport(list, fileName, response);
}
private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response,
ExportParams exportParams) {
Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
if (workbook != null)
;
downLoadExcel(fileName, response, workbook);
}
private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
try {
response.setCharacterEncoding("UTF-8");
response.setHeader("content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
workbook.write(response.getOutputStream());
} catch (IOException e) {
throw new NormalException(e.getMessage());
}
}
private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
if (workbook != null)
;
downLoadExcel(fileName, response, workbook);
}
public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) {
if (StringUtils.isBlank(filePath)) {
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List<T> list = null;
try {
list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
} catch (NoSuchElementException e) {
throw new NormalException("模板不能为空");
} catch (Exception e) {
e.printStackTrace();
throw new NormalException(e.getMessage());
}
return list;
}
public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows,
Class<T> pojoClass) {
if (file == null) {
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List<T> list = null;
try {
list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
} catch (NoSuchElementException e) {
throw new NormalException("excel文件不能为空");
} catch (Exception e) {
throw new NormalException(e.getMessage());
}
return list;
}
private static class NormalException extends RuntimeException {
public NormalException(String msg) {
super(msg);
}
}
}
3、创建表格样式工具类
public class ExcelStyleUtil implements IExcelExportStyler{
private static final short STRING_FORMAT = (short) BuiltinFormats.getBuiltinFormat("TEXT");
private static final short FONT_SIZE_TEN = 10;
private static final short FONT_SIZE_ELEVEN = 11;
private static final short FONT_SIZE_TWELVE = 12;
/**
* 大标题样式
*/
private CellStyle headerStyle;
/**
* 每列标题样式
*/
private CellStyle titleStyle;
/**
* 数据行样式
*/
private CellStyle styles;
public ExcelStyleUtil(Workbook workbook) {
this.init(workbook);
}
/**
* 初始化样式
*
* @param workbook
*/
private void init(Workbook workbook) {
this.headerStyle = initHeaderStyle(workbook);
this.titleStyle = initTitleStyle(workbook);
this.styles = initStyles(workbook);
}
@Override
public CellStyle getHeaderStyle(short headerColor) {
// TODO Auto-generated method stub
return headerStyle;
}
@Override
public CellStyle getTitleStyle(short color) {
// TODO Auto-generated method stub
return titleStyle;
}
@Override
public CellStyle getStyles(boolean parity, ExcelExportEntity entity) {
// TODO Auto-generated method stub
return styles;
}
@Override
public CellStyle getStyles(Cell cell, int dataRow, ExcelExportEntity entity, Object obj, Object data) {
// TODO Auto-generated method stub
return getStyles(true, entity);
}
@Override
public CellStyle getTemplateStyles(boolean isSingle, ExcelForEachParams excelForEachParams) {
// TODO Auto-generated method stub
return null;
}
/**
* 初始化--大标题样式
*
* @param workbook
* @return
*/
private CellStyle initHeaderStyle(Workbook workbook) {
CellStyle style = getBaseCellStyle(workbook);
style.setFont(getFont(workbook, FONT_SIZE_TWELVE, true));
return style;
}
/**
* 初始化--每列标题样式
*
* @param workbook
* @return
*/
private CellStyle initTitleStyle(Workbook workbook) {
CellStyle style = getBaseCellStyle(workbook);
style.setFont(getFont(workbook, FONT_SIZE_ELEVEN, false));
//背景色
style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
return style;
}
/**
* 初始化--数据行样式
*
* @param workbook
* @return
*/
private CellStyle initStyles(Workbook workbook) {
CellStyle style = getBaseCellStyle(workbook);
style.setFont(getFont(workbook, FONT_SIZE_TEN, false));
style.setDataFormat(STRING_FORMAT);
return style;
}
/**
* 基础样式
*
* @return
*/
private CellStyle getBaseCellStyle(Workbook workbook) {
CellStyle style = workbook.createCellStyle();
//下边框
style.setBorderBottom(BorderStyle.THIN);
//左边框
style.setBorderLeft(BorderStyle.THIN);
//上边框
style.setBorderTop(BorderStyle.THIN);
//右边框
style.setBorderRight(BorderStyle.THIN);
//水平居中
style.setAlignment(HorizontalAlignment.CENTER);
//上下居中
style.setVerticalAlignment(VerticalAlignment.CENTER);
//设置自动换行
style.setWrapText(true);
return style;
}
/**
* 字体样式
*
* @param size 字体大小
* @param isBold 是否加粗
* @return
*/
private Font getFont(Workbook workbook, short size, boolean isBold) {
Font font = workbook.createFont();
//字体样式
font.setFontName("宋体");
//是否加粗
font.setBold(isBold);
//字体大小
font.setFontHeightInPoints(size);
return font;
}
}
4、创建表格实体类每一个sheet是一个类（两个sheet）。
public class RtuExcelEntity {
private String id;
@Excel(name = "RTU编号", orderNum = "1")
private int rtu_no;
@Excel(name = "RTU名称", width=20, orderNum = "2")
private String rtu_name;
public RtuExcelEntity(String id, int rtu_no, String rtu_name) {
this.id = id;
this.rtu_no = rtu_no;
this.rtu_name = rtu_name;
}
public RtuExcelEntity() {
// TODO Auto-generated constructor stub
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public int getRtu_no() {
return rtu_no;
}
public void setRtu_no(int rtu_no) {
this.rtu_no = rtu_no;
}
public String getRtu_name() {
return rtu_name;
}
public void setRtu_name(String rtu_name) {
this.rtu_name = rtu_name;
}
}
public class YcParamExcelEntity {
private long id;
@Excel(name="RTU名称",width=20,orderNum="0")
private String rtu_name;
@Excel(name="RTU编号",orderNum="1")
private int rtu_no;
@Excel(name = "遥测名称",width=20, orderNum = "2")
private String name;
@Excel(name = "遥测编号", orderNum = "3")
private int data_no;
@Excel(name = "数据类型",width=15,replace = {"累加遥测_1", "普通遥测_2"}, orderNum = "4")
private int type;
@Excel(name = "系数", orderNum = "5")
private double factor;
@Excel(name = "基值", orderNum = "6")
private double base_value;
public YcParamExcelEntity(long id, int rtu_no, String name, String rtu_name, int data_no, int type, double factor,
double base_value) {
super();
this.id = id;
this.rtu_no = rtu_no;
this.name = name;
this.rtu_name = rtu_name;
this.data_no = data_no;
this.type = type;
this.factor = factor;
this.base_value = base_value;
}
public YcParamExcelEntity() {
super();
// TODO Auto-generated constructor stub
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public int getRtu_no() {
return rtu_no;
}
public void setRtu_no(int rtu_no) {
this.rtu_no = rtu_no;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getRtu_name() {
return rtu_name;
}
public void setRtu_name(String rtu_name) {
this.rtu_name = rtu_name;
}
public int getData_no() {
return data_no;
}
public void setData_no(int data_no) {
this.data_no = data_no;
}
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
public double getFactor() {
return factor;
}
public void setFactor(double factor) {
this.factor = factor;
}
public double getBase_value() {
return base_value;
}
public void setBase_value(double base_value) {
this.base_value = base_value;
}
}
5、实现导出
/**
* 模板下载
* @param request
* @param response
*/
@RequestMapping("/downloadExcel")
public void downloadExcel(HttpServletRequest request, HttpServletResponse response) {
//需要导出的数据列表。
List<RtuExcelEntity> list = new ArrayList<>();
//workbook（两个sheet）前两个参数是sheet页名称，后两个参数是对应的数据集合
Workbook workbook = getSheetsList("遥测参数","rtu参数",new ArrayList<>(),list );
//设置sheet中的单元格
Sheet sheet = workbook.getSheet("遥测参数");
//下拉列表单元格
String[] textlist = { "普通遥测", "累加遥测"};
sheet = setHSSFValidation(sheet, textlist, 2, 2, 4, 4);
//单元格设置公式
sheet = setCellFormula(sheet,rtuList.size());
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "POST,GET,OPTIONS,DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
response.setContentType("application/x-msdownload");
String filedisplayName = "遥测参数列表.xls";
try {
filedisplayName = URLEncoder.encode(filedisplayName, "UTF-8");
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
response.addHeader("Content-Disposition", "attachment;filename=" + filedisplayName);
try (OutputStream out = response.getOutputStream()) {
workbook.write(out);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 设置某些列的值只能输入预制的数据,显示下拉框.
* @param sheet 要设置的sheet.
* @param textlist 下拉框显示的内容
* @param firstRow 开始行
* @param endRow 结束行
* @param firstCol 开始列
* @param endCol 结束列
* @return 设置好的sheet.
*/
public static Sheet setHSSFValidation(Sheet sheet,
String[] textlist, int firstRow, int endRow, int firstCol,
int endCol) {
// 加载下拉列表内容
DVConstraint constraint = DVConstraint.createExplicitListConstraint(textlist);
// 设置数据有效性加载在哪个单元格上,四个参数分别是：起始行、终止行、起始列、终止列
CellRangeAddressList regions = new CellRangeAddressList(firstRow,endRow, firstCol, endCol);
// 数据有效性对象
HSSFDataValidation data_validation_list = new HSSFDataValidation(regions, constraint);
sheet.addValidationData(data_validation_list);
return sheet;
}
/**
* 为单元格设置公式
* @param sheet
* @param size
* @return
*/
public static Sheet setCellFormula(Sheet sheet,int size) {
Row row = sheet.createRow(2);
Cell cell=row.createCell(0);
// Create POWER formula
cell.setCellType(HSSFCell.CELL_TYPE_FORMULA);
//行号加上表格名称行与表头行
size += 2;
String string = "LOOKUP(TEXT(B3,\"0\"),rtu参数!$A$3:$A$"+size+",rtu参数!$B$3:$B$"+size+")";
cell.setCellFormula(string);
return sheet;
}