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java 导出Excls的方法（此方法比较简单的，好操作的方法）
1.在pom.xml文件中加入如下代码：
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>${poi.version}</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>${poi.version}</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>${poi.version}</version>
</dependency>2.导出excel的工具类方法
下边代码中exportExcel方法中的各个参数含义：
1.list是需要导出数据的集合；
2.filePath是模板文件的位置；
3.title excel的标题；
4.beginRow导出数据在表格中的开始行数；
HSSFWorkbook excel的文档对象
HSSFSheet excel的表单
HSSFRow excel的行
HSSFCell excel的格子单元
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HSSFFont excel字体
HSSFCellStyle cell样式
public class ExportExcel
{
public static void exportExcel(HttpServletResponse response, List<Map<String, Object>> list,
String filePath, String title, int beginRow)
throws IOException
{
HSSFSheet sheet = null;
HSSFRow row = null;
HSSFCell cell = null;
HSSFCellStyle style = null;
HSSFWorkbook workbook = null;
try
{
workbook = new HSSFWorkbook(new FileInputStream(filePath));
sheet = workbook.getSheetAt(0);
}
catch (IOException e1)
{
response.getWriter().write("模板不存在");
return;
}
for (int i = 0; i < beginRow; i++ )
{
row = sheet.getRow(i);
for (int j = 0; j < row.getPhysicalNumberOfCells(); j++ )
{
cell = row.getCell((short)j);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
if (cell.getStringCellValue() != null
&& cell.getStringCellValue().indexOf("{title}") > -1)
{
cell.setCellValue(cell.getStringCellValue().replaceAll("\\{title\\}", title));
}
}
}
try
{
style = sheet.getRow(beginRow).getCell((short)0).getCellStyle();
style.setWrapText(true);
for (int i = 0; i < list.size(); i++ )
{
row = sheet.createRow((int)i + beginRow);
HashMap<String, String> map = (HashMap)list.get(i);
int j = 0;
for (String key : map.keySet())
{
cell = row.createCell((short)j, HSSFCellStyle.ALIGN_CENTER);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setCellValue(toEmpty(String.valueOf(map.get(key))));
cell.setCellStyle(style);
j += 1;
}
}
ServletOutputStream output = response.getOutputStream();
try
{
response.reset();
response.setContentType("application/vnd.ms-excel;charset=utf-8");
response.setHeader("Content-Disposition",
"attachment;filename=" + new String((title + ".xls").getBytes(),
"iso-8859-1"));
// out.clear(); //清空缓存的内容。
// out = pageContext.pushBody(); //参考API
workbook.write(output);
output.flush();
output.close();
}
catch (Exception e)
{
response.getWriter().write("导出失败");
}
finally
{
output.close();
}
}
catch (Exception e)
{
e.printStackTrace();
response.getWriter().write("导出失败");
}
}
}2.在controller中调用的工具类方法
@RequestMapping(value = {"exportExcel"})
public void exportExcel(TOtherItem tOtherItem, HttpServletRequest request,
HttpServletResponse response)
{
String zd = request.getParameter("zd");
String dd = request.getParameter("dd");
String officeSql = QueryUtils.querySql(zd, dd, "a", "officeid");
tOtherItem.getSqlMap().put("officeSql", officeSql);
tOtherItem.getSqlMap().put("stime", request.getParameter("stime"));
tOtherItem.getSqlMap().put("etime", request.getParameter("etime"));
List<TOtherItem> list = otherItemService.findList(tOtherItem);
List dataList = new ArrayList();
int i = 1;
for (TOtherItem oi : list)
{
//向excls中每一列插入数据
dataList.add(mapTemp);
}
try
{
String os = System.getProperties().getProperty("os.name");
String filepath = this.getClass().getClassLoader().getResource(
"/excel/otherItem.xls").getPath();
if (filepath != null && filepath.indexOf("/") == 0
&& os.toLowerCase().startsWith("win"))
{
filepath = filepath.substring(1, filepath.length());
}
//调用工具类方法，5代表excls开始的行
ExportExcel.exportExcel(response, dataList, filepath, "XXXX-日常巡查-其他事项日志", 5);
}
catch (Exception e)
{
logger.error("其他事项日志Excel失败--" + e.getMessage(), e);
}
}