easyPoi单sheet与多sheet导出excel简单实用（重点：自动列宽的设置）
导入依赖
cn.afterturn
easypoi-base
3.2.0
单sheet导出
@PostMapping("exportTeacherInfo")
@ResponseBody
public JSONObject exportTeacherInfo(HttpServletRequest request, HttpServletResponse response, @RequestBody ExprotBean exprotBean) throws IOException
{
try
{
List entity = new ArrayList();
List objects = exprotBean.getOptions();
// 设置动态列
initColm(objects, entity);
// 动态列数据
List> dataArr = new ArrayList>();
List zghs = exprotBean.getSels();
if (zghs != null && CollectionUtils.isNotEmpty(zghs))
{
Map param = new HashMap(1);
param.put("zghs", zghs);
dataArr = jzgJbxxService.findQuery(" SELECT * FROM V_JZG_EXPORT_INFO V WHERE V.ZGH IN (:zghs) ", param);
} else
{
dataArr = jzgJbxxService.findQuery(" SELECT * FROM V_JZG_EXPORT_INFO V ");
}
// 创建工作簿
Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams("教职工信息表", "数据"), entity, dataArr);
// 将文件写到系统下载位置，此处多数是直接将表格用输出流写到浏览器页面。
String downFileName = FileUtil.writeWorkBookFileToSystem(workbook, systemConfig);
return OutPutJson.success("导出成功", downFileName);
} catch (Exception e)
{
logger.error(e.getMessage(), e);
return OutPutJson.failure("导出失败");
}
}
/**
* 初始化动态列
* @param checkGzjl
* @param entity
*/
private void initColm(List checkGzjl, List entity)
{
for (int i = 0; i < checkGzjl.size(); i++)
{
JSONObject obj = JSONObject.parseObject(checkGzjl.get(i));
String MC = (String) obj.get("MC"); // 此处名称为列名
String KEY = (String) obj.get("KEY"); // 此处KEY为与数据集合对应匹配字段代码
entity.add(new ExcelExportEntity(MC, KEY));
}
}
多sheet导出
/**
* 导出教职工扩展信息
*
* @param request
* @param response
* @param exportKzxxBean
* @return
* @throws IOException
*/
@SuppressWarnings("unchecked")
@PostMapping("exportTeacherKzxx")
@ResponseBody
public JSONObject exportTeacherKzxx(HttpServletRequest request, HttpServletResponse response, @RequestBody ExportKzxxBean exportKzxxBean) throws IOException
{
try
{
// 多sheet
List> list = new ArrayList>();
// 此为是否存在列
List checkGzjl = exportKzxxBean.getCheckGzjl();
List checkJtcy = exportKzxxBean.getCheckJtcy();
List zghs = exportKzxxBean.getSels();
Map param = new HashMap(1);
if (zghs != null && CollectionUtils.isNotEmpty(zghs))
{
param.put("zghs", zghs);
}
List> dataArr = new ArrayList>();
// 工作经历
if (checkGzjl.size() > 1)
{
List entity = new ArrayList();
initColm(checkGzjl, entity); //与单sheet导出所初始化列方法一样
if (zghs != null && CollectionUtils.isNotEmpty(zghs))
{
dataArr = jzgJbxxService.findQuery(" SELECT G.D_ID_, G.ZGH, G.SZDWMC,TO_CHAR(G.QSRQ,'YYYY-MM') QSNY,TO_CHAR(G.JZRQ,'YYYY-MM') JZNY,G.ZRDZZW,G.ZRJSZWDM,G.ZMR,G.CSGZNR,GETVALUEBYTABLE('STD_GB_ZYJSZW', 'NAME', 'CODE', G.ZRJSZWDM) ZRJSZWMC FROM T_JZG_GZJLXX G WHERE G.ZGH IN (:zghs) ORDER BY G.ZGH ASC, G.QSRQ DESC", param);
} else
{
dataArr = jzgJbxxService.findQuery(" SELECT G.D_ID_,G.ZGH, G.SZDWMC,TO_CHAR(G.QSRQ,'YYYY-MM') QSNY,TO_CHAR(G.JZRQ,'YYYY-MM') JZNY,G.ZRDZZW,G.ZRJSZWDM,G.ZMR,G.CSGZNR,GETVALUEBYTABLE('STD_GB_ZYJSZW', 'NAME', 'CODE', G.ZRJSZWDM) ZRJSZWMC FROM T_JZG_GZJLXX G ORDER BY G.ZGH ASC, G.QSRQ DESC ");
}
Map data = new HashMap();
data.put("title", new ExportParams("工作经历", "工作经历"));
data.put("entity", entity);
data.put("data", dataArr);
list.add(data);
}
// 家庭成员
if (checkJtcy.size() > 1)
{
List entity = new ArrayList();
initColm(checkJtcy, entity); //与单sheet导出所初始化列方法一样
if (zghs != null && CollectionUtils.isNotEmpty(zghs))
{
dataArr = jzgJbxxService.findQuery(" SELECT * FROM V_JZG_JTCYXX V WHERE V.ZGH IN (:zghs) ORDER BY V.ZGH ASC ", param);
} else
{
dataArr = jzgJbxxService.findQuery(" SELECT * FROM V_JZG_JTCYXX V ORDER BY V.ZGH ASC ");
}
Map data = new HashMap();
data.put("title", new ExportParams("家庭成员", "家庭成员"));
data.put("entity", entity);
data.put("data", dataArr);
list.add(data);
}
// 新建工作簿
Workbook workbook = new HSSFWorkbook();
// 循环创建sheet并匹配数据
for (Map map : list)
{
ExcelExportService service = new ExcelExportService();
service.createSheetForMap(workbook, (ExportParams) map.get("title"), (List) map.get("entity"), (Collection) map.get("data"));
}
// 将文件写到系统下载位置
String downFileName = FileUtil.writeWorkBookFileToSystem(workbook, systemConfig);
return OutPutJson.success("导出成功", downFileName);
} catch (Exception e)
{
logger.error(e.getMessage(), e);
return OutPutJson.failure("导出失败");
}
}
自动列宽的设置
因ExcelExportUtil.exportExcel()里面new ExcelExportService ().createSheetForMap(workbook, entity, entityList, dataSet);里面设置了固定列宽（可去看源码），导致导出列中字重叠。很不美观。可重写ExcelExportService 类的setCellWith方法。如下：
public void setCellWith(List excelParams, Sheet sheet) {
for (int i = 0; i < excelParams.size(); i++) {
if (excelParams.get(i).getList() != null) {
List list = excelParams.get(i).getList();
for (int j = 0; j < list.size(); j++) {
// 调整每一列宽度
sheet.autoSizeColumn((short) i);
// 解决自动设置列宽中文失效的问题
sheet.setColumnWidth(i, sheet.getColumnWidth(j) * 17 / 10);
}
} else {
// 调整每一列宽度
sheet.autoSizeColumn((short) i);
// 解决自动设置列宽中文失效的问题
sheet.setColumnWidth(i, sheet.getColumnWidth(i) * 17 / 10);
}
}
