1.POI工具類java
package com.lshaci.utils;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPalette;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ss.util.RegionUtil;
/**
* 使用POI導出EXCEL
*
* @author lshaci
*
*/
public class ExcelExportUtilWithPOI {
/**
* 使用POI建立Excel
*
* @param sheetName Excel標籤名字
* @param firstTitleName 一級標題名字（第一行合併單元格內）
* @param secondTitleNames 二級標題名字集合（第二行）
* @param secondTitleColumns 二級標題所跨列的集合
* @param columnHeaders 列標題集合（第三行）
* @param fieldNames 對象字段名集合
* @param datas 數據集合
* @param otherData 其它的數據（表格最後一行合併的單元格內）
*
* @return 返回流信息
*/
public static <T> InputStream createWorkBook(String sheetName, String firstTitleName, List<String> secondTitleNames, List<Integer> secondTitleColumns,
List<String> columnHeaders, List<String> fieldNames, List<T> datas, String otherData) {
try (
ByteArrayOutputStream os = new ByteArrayOutputStream();
) {
// 聲明一個工做薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 建立一個sheet
HSSFSheet sheet = workbook.createSheet(sheetName);
// 設置列寬
sheet.setDefaultColumnWidth(12);
// 設置序號列的寬度
sheet.setColumnWidth(0, 1500);
// 設置一級標題行
setFirstTitleRow(workbook, sheet, firstTitleName, columnHeaders.size());
// 設置二級標題行
setSecondTitleRows(workbook, sheet, secondTitleNames, secondTitleColumns);
// 設置列的標題
setColumnTitles(workbook, sheet, columnHeaders);
List<String[]> rowDatas = javaBean2StringArrays(datas, fieldNames);
// 設置表格中的內容
setSheetRows(workbook, sheet, rowDatas);
// 若是其它數據存在，則進行填充
if (otherData != null && otherData != "") {
setOtherDataRows(workbook, sheet, otherData, 3 + rowDatas.size(), columnHeaders.size());
}
workbook.write(os);
return new ByteArrayInputStream(os.toByteArray());
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("建立excel表格出錯");
}
}
/**
* 設置表格一級標題行
*
* @param workbook 工做簿
* @param sheet 標籤
* @param firstTitleName 一級標題名稱
* @param size 一級標題所跨列數
*/
private static void setFirstTitleRow(HSSFWorkbook workbook, HSSFSheet sheet, String firstTitleName, int size) {
HSSFRow row = sheet.createRow(0);
row.setHeight((short) 1600);
CellRangeAddress region = new CellRangeAddress(0, 0, 0, size);
sheet.addMergedRegion(region);
HSSFCell cell = row.createCell(0);
cell.setCellValue(firstTitleName);
cell.setCellStyle(createFirstTitleStyle(workbook));
// 設置合併單元格的邊框
setMergeCellBorder(region, sheet, workbook);
}
/**
* 建立一級標題樣式
*
*/
private static HSSFCellStyle createFirstTitleStyle(HSSFWorkbook workbook) {
// 生成一個樣式
HSSFCellStyle style = workbook.createCellStyle();
HSSFPalette customPalette = workbook.getCustomPalette();
HSSFColor color = customPalette.findSimilarColor(102, 102, 153);
// 設置這些樣式
style.setFillForegroundColor(HSSFColor.WHITE.index);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成一個字體
HSSFFont font = workbook.createFont();
font.setColor(color.getIndex());
font.setFontHeightInPoints((short) 20);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
font.setFontName("華文楷體");
// 把字體應用到當前的樣式
style.setFont(font);
style.setWrapText(true); // 使用 \n 換行設置爲true
return style;
}
/**
* 設置表格二級標題行
*
* @param workbook 工做簿
* @param sheet 標籤
* @param secondTitleNames 二級標題名稱集合
* @param secondTitleColumns 二級標題所跨列數集合
*/
private static void setSecondTitleRows(HSSFWorkbook workbook, HSSFSheet sheet, List<String> secondTitleNames,
List<Integer> secondTitleColumns) {
if (secondTitleNames.isEmpty() || secondTitleColumns.isEmpty() ||
secondTitleNames.size() != secondTitleColumns.size()) {
throw new RuntimeException("二級標題名對應所跨的列數量不一致！");
}
HSSFRow row = sheet.createRow(1);
row.setHeight((short) 400);
for (int i = 0; i < secondTitleNames.size(); i++) {
Integer now = secondTitleColumns.get(i) - 1;
Integer last = i == 0 ? 0 : secondTitleColumns.get(i - 1);
HSSFCell cell = row.createCell(last);;
cell.setCellValue(secondTitleNames.get(i));
cell.setCellStyle(createSecondTitleStyle(workbook));
if (now > 0) {
CellRangeAddress region = new CellRangeAddress(1, 1, last, last + now);
sheet.addMergedRegion(region);
// 設置合併單元格的邊框
setMergeCellBorder(region, sheet, workbook);
}
}
}
/**
* 建立二級標題樣式
*/
private static HSSFCellStyle createSecondTitleStyle(HSSFWorkbook workbook) {
// 生成一個樣式
HSSFCellStyle style = workbook.createCellStyle();
HSSFPalette customPalette = workbook.getCustomPalette();
HSSFColor color = customPalette.findSimilarColor(102, 102, 153);
// 設置這些樣式
style.setFillForegroundColor(HSSFColor.WHITE.index);
// 設置表格邊框
setBorder(style);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成一個字體
HSSFFont font = workbook.createFont();
font.setColor(color.getIndex());
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
font.setFontName("微軟雅黑");
// 把字體應用到當前的樣式
style.setFont(font);
return style;
}
/**
* 設置表格的列標題
*
* @param workbook 工做薄
* @param sheet 表格中的一個標籤頁
* @param headers 列標題名稱的字符串數組
* @throws ExcelHanlderException
*/
private static void setColumnTitles(HSSFWorkbook workbook, HSSFSheet sheet, List<String> columnHeaders) {
if (columnHeaders.isEmpty()) {
throw new RuntimeException("列標題集合爲空！");
}
HSSFRow row = sheet.createRow(2);
row.setHeight((short) 360);
HSSFCellStyle columnTitleStyle = createColumnTitleStyle(workbook);
for (int i = 0; i <= columnHeaders.size(); i++) {
HSSFCell cell = row.createCell(i);
String value = i == 0 ? "序號" : columnHeaders.get(i - 1);
cell.setCellValue(value);
cell.setCellStyle(columnTitleStyle);
}
}
/**
* 建立列標題欄樣式
*/
private static HSSFCellStyle createColumnTitleStyle(HSSFWorkbook workbook) {
// 生成一個樣式
HSSFCellStyle style = workbook.createCellStyle();
// 根據RGB獲取類似的顏色
HSSFPalette customPalette = workbook.getCustomPalette();
HSSFColor color = customPalette.findSimilarColor(102, 102, 153);
// 設置這些樣式
style.setFillForegroundColor(HSSFColor.WHITE.index);
setBorder(style);
// 設置水平和垂直居中
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成一個字體
HSSFFont font = workbook.createFont();
font.setColor(color.getIndex());
font.setFontHeightInPoints((short) 10);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
font.setFontName("宋體");
// 把字體應用到當前的樣式
style.setFont(font);
return style;
}
/**
* 設置表格中的內容
*
* @param workbook 工做薄
* @param sheet 表格中的一個標籤頁
* @param rows 內容字符串數組集合
* @throws ExcelHanlderException
*/
private static void setSheetRows(HSSFWorkbook workbook, HSSFSheet sheet, List<String[]> rowDatas) {
if (rowDatas.isEmpty()) {
throw new RuntimeException("內容集合爲空！");
}
HSSFCellStyle contentStyle = createContentStyle(workbook);
for (int i = 0; i < rowDatas.size(); i++) {
HSSFRow row = sheet.createRow(3 + i);
row.setHeight((short) 320);
String[] rowData = rowDatas.get(i);
for (int j = 0; j <= rowData.length; j++) {
HSSFCell cell = row.createCell(j);
String value = j == 0 ? (i + 1) + "" : rowData[j - 1];
cell.setCellValue(value);
cell.setCellStyle(contentStyle);
}
}
}
/**
* 建立表格內容樣式
*
* @param workbook 工做薄
* @return
*/
private static HSSFCellStyle createContentStyle(HSSFWorkbook workbook) {
// 生成一個樣式
HSSFCellStyle style = workbook.createCellStyle();
// 設置這些樣式
style.setFillForegroundColor(HSSFColor.WHITE.index);
// style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
setBorder(style);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成一個字體
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.BLACK.index);
font.setFontHeightInPoints((short) 10);
font.setFontName("宋體");
// 把字體應用到當前的樣式
style.setFont(font);
return style;
}
/**
* 設置合併單元格的邊框
*
* @param region 合併的單元格
* @param sheet 標籤
* @param workbook 工做簿
*/
private static void setMergeCellBorder(CellRangeAddress region, HSSFSheet sheet, HSSFWorkbook workbook) {
RegionUtil.setBorderBottom(1, region, sheet, workbook);
RegionUtil.setBorderLeft(1, region, sheet, workbook);
RegionUtil.setBorderRight(1, region, sheet, workbook);
RegionUtil.setBorderTop(1, region, sheet, workbook);
}
/**
* 設置表格邊框
*
* @param style 表格樣式
*/
private static void setBorder(HSSFCellStyle style) {
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
}
/**
* 設置一些其它數據，在表格最後一行合併單元格內
*
* @param workbook
* @param sheet
* @param otherData
* @param rowIndex
* @param size
*/
private static void setOtherDataRows(HSSFWorkbook workbook, HSSFSheet sheet, String otherData, int rowIndex, int size) {
HSSFRow row = sheet.createRow(rowIndex);
row.setHeight((short) 320);
CellRangeAddress region = new CellRangeAddress(rowIndex, rowIndex, 0, size);
sheet.addMergedRegion(region);
HSSFCell cell = row.createCell(0);
cell.setCellValue(otherData);
HSSFCellStyle style = createContentStyle(workbook);
style.setAlignment(HSSFCellStyle.ALIGN_LEFT);
style.setWrapText(true);
cell.setCellStyle(style);
// 設置合併單元格的邊框
setMergeCellBorder(region, sheet, workbook);
}
/**
* javaBean轉換爲String數組集合
*
* @param datas 須要轉換的數據集合(對象類型，符合javaBean規範)
* @param fields 指定須要轉換的字段集合
* @return
* @throws SecurityException
* @throws NoSuchMethodException
* @throws InvocationTargetException
* @throws IllegalArgumentException
* @throws IllegalAccessException
*/
private static <T> List<String[]> javaBean2StringArrays(List<T> datas, List<String> fieldNames)
throws NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
if (datas.isEmpty()) {
throw new RuntimeException("數據爲空！");
}
List<String[]> rows = new ArrayList<>();
Class<?> clazz = datas.get(0).getClass();
if (fieldNames.isEmpty()) {
throw new RuntimeException("字段名爲空！");
}
Method[] methods = getMethods(clazz, fieldNames);
for (T data : datas) {
int length = methods.length;
String[] row = new String[length];
for (int i = 0; i < length; i++) {
Object obj = methods[i].invoke(data);
if (obj != null) {
row[i] = obj.toString();
} else {
row[i] = "";
}
}
rows.add(row);
}
return rows;
}
/**
* 根據字段名獲取get方法
*
* @param clazz 須要獲取get方法對象的Class
* @param fieldNames 字段名字符串集合
* @return
* @throws NoSuchMethodException
* @throws SecurityException
*/
private static Method[] getMethods(Class<?> clazz, List<String> fieldNames)
throws NoSuchMethodException, SecurityException {
int length = fieldNames.size();
Method[] methods = new Method[length];
for (int i = 0; i < length; i++) {
String fieldName = fieldNames.get(i);
String methodName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
methods[i] = clazz.getMethod(methodName);
}
return methods;
}
}
2.controllerapache
@RequestMapping(value = "exportDoctorsSummary", method = RequestMethod.GET)
public void exportDoctorsSummary(HttpServletRequest request, HttpServletResponse response) throws IOException {
String fileName = new String("文件名.xls".getBytes(), "iso-8859-1");
InputStream is = service.createExcel();//TODO 本身實現
// 設置response參數，能夠打開下載頁面
response.reset();
response.setContentType("application/vnd.ms-excel;charset=utf-8");
response.setHeader("Content-Disposition", "attachment;filename=" + fileName);
ServletOutputStream out = response.getOutputStream();
try (
BufferedInputStream bis = new BufferedInputStream(is);
BufferedOutputStream bos = new BufferedOutputStream(out);
) {
byte[] buff = new byte[2048];
int bytesRead;
// Simple read/write loop.
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
} catch (final IOException e) {
throw e;
}
}