多说无益，直接上代码
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping(value = "/analyze")
public class AnalyzeController {
@RequestMapping(value = "/export")
public void excelExport(HttpServletRequest request,
HttpServletResponse response) {
String fileName = "文件名";
// 填充projects数据
List<TestAnalyzeModal> projects = createData();
List<Map<String, Object>> list = createExcelRecord(projects);
String columnNames[] = {"ID","姓名" };// 列名
String keys[] = { "id", "name" };// map中的key
ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
createWorkBook(list, keys, columnNames).write(os);
} catch (IOException e) {
}
byte[] content = os.toByteArray();
InputStream is = new ByteArrayInputStream(content);
// 设置response参数，可以打开下载页面
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
response.reset();
response.setContentType("application/vnd.ms-excel;charset=utf-8");
response.setHeader("Content-Disposition", "attachment;filename="
+ new String((fileName + ".xls").getBytes(), "iso-8859-1"));
ServletOutputStream out = response.getOutputStream();
bis = new BufferedInputStream(is);
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) {
try {
throw e;
} catch (IOException e1) {
}
} finally {
if (bis != null)
try {
bis.close();
} catch (IOException e) {
}
if (bos != null)
try {
bos.close();
} catch (IOException e) {
}
}
}
private List<TestAnalyzeModal> createData() {
List<TestAnalyzeModal> list = new ArrayList<TestAnalyzeModal>();
//数据绑定
return list;
}
private List<Map<String, Object>> createExcelRecord(
List<TestAnalyzeModal> projects) {
List<Map<String, Object>> listmap = new ArrayList<Map<String, Object>>();
Map<String, Object> map = new HashMap<String, Object>();
map.put("sheetName", "sheet1");
listmap.add(map);
TestAnalyzeModal project = null;
for (int j = 0; j < projects.size(); j++) {
project = projects.get(j);
Map<String, Object> mapValue = new HashMap<String, Object>();
mapValue.put("id", project.getId());
mapValue.put("name", project.getName());
listmap.add(mapValue);
}
return listmap;
}
/**
* 创建excel文档，
*
* @param list
* 数据
* @param keys
* list中map的key数组集合
* @param columnNames
* excel的列名
* */
public static Workbook createWorkBook(List<Map<String, Object>> list,
String[] keys, String columnNames[]) {
// 创建excel工作簿
Workbook wb = new HSSFWorkbook();
// 创建第一个sheet（页），并命名
Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString());
// 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。
for (int i = 0; i < keys.length; i++) {
sheet.setColumnWidth((short) i, (short) (35.7 * 150));
}
// 创建第一行
Row row = sheet.createRow((short) 1);
// 创建两种单元格格式
CellStyle cs = wb.createCellStyle();
CellStyle cs2 = wb.createCellStyle();
// 创建两种字体
Font f = wb.createFont();
Font f2 = wb.createFont();
// 创建第一种字体样式（用于列名）
f.setFontHeightInPoints((short) 10);
f.setColor(IndexedColors.BLACK.getIndex());
f.setBoldweight(Font.BOLDWEIGHT_BOLD);
// 创建第二种字体样式（用于值）
f2.setFontHeightInPoints((short) 10);
f2.setColor(IndexedColors.BLACK.getIndex());
// Font f3=wb.createFont();
// f3.setFontHeightInPoints((short) 10);
// f3.setColor(IndexedColors.RED.getIndex());
// 设置第一种单元格的样式（用于列名）
cs.setFont(f);
cs.setBorderLeft(CellStyle.BORDER_THIN);
cs.setBorderRight(CellStyle.BORDER_THIN);
cs.setBorderTop(CellStyle.BORDER_THIN);
cs.setBorderBottom(CellStyle.BORDER_THIN);
cs.setAlignment(CellStyle.ALIGN_CENTER);
// 设置第二种单元格的样式（用于值）
cs2.setFont(f2);
cs2.setBorderLeft(CellStyle.BORDER_THIN);
cs2.setBorderRight(CellStyle.BORDER_THIN);
cs2.setBorderTop(CellStyle.BORDER_THIN);
cs2.setBorderBottom(CellStyle.BORDER_THIN);
cs2.setAlignment(CellStyle.ALIGN_CENTER);
//合并单元格
int num = 2;
Row rowFirst = sheet.createRow((short) 0);
Cell cellFirst=rowFirst.createCell(num);
cellFirst.setCellValue("value");
cellFirst.setCellStyle(cs);
//CellRangeAddress(起始行,结束行,起始列,结束)
//合并行
sheet.addMergedRegion(new CellRangeAddress(0,0,2,5));
//合并列
sheet.addMergedRegion(new CellRangeAddress(0,1,0,0));
// 设置列名
for (int i = 0; i < columnNames.length; i++) {
Cell cell = row.createCell(i);
cell.setCellValue(columnNames[i]);
cell.setCellStyle(cs);
}
// 设置每行每列的值
for (short i = 1; i < list.size(); i++) {
// Row 行,Cell 方格 , Row 和 Cell 都是从0开始计数的
// 创建一行，在页sheet上
Row row1 = sheet.createRow((short) i+1);
// 在row行上创建一个方格
for (short j = 0; j < keys.length; j++) {
Cell cell = row1.createCell(j);
cell.setCellValue(list.get(i).get(keys[j]) == null ? " " : list
.get(i).get(keys[j]).toString());
cell.setCellStyle(cs2);
}
}
Row bottom= sheet.createRow((short) list.size()+3);
String title = "说明";
Cell bottomCell=bottom.createCell(0);
bottomCell.setCellValue(new HSSFRichTextString(title));
//自动换行
cs2.setWrapText(true);
//左对齐
cs2.setAlignment(CellStyle.ALIGN_LEFT);
bottomCell.setCellStyle(cs2);
sheet.addMergedRegion(new CellRangeAddress(list.size()+3,list.size()+7,0,10));
return wb;
}
}