JavaWeb中导出excel文件的简单方法
发布于 2020-8-17|
下面小妖就为大家带来一篇JavaWeb中导出excel文件的简单方法。小妖觉得挺不错的，现在就分享给大家，也给大家做个参考。一起跟随小妖过来看看吧
在平时做系统项目时，经常会需要做导出功能，不论是导出excel，还是导出cvs文件。我下面的demo是在springmvc的框架下实现的。1.JS中只需要用GET模式请求导出就可以了：
```java
$('#word-export-btn').parent().on('click',function(){
var promotionWord = JSON.stringify($('#mainForm').serializeObject());
location.target="_blank" rel="nofollow" href="${ctx}/promotionWord/export?promotionWord="+promotionWord;
});
```
2.在controller中要做的是将文件以数据流格式输出：
```java
@RequestMapping("/export")
public void export(HttpSession session, String promotionWord, HttpServletRequest request, HttpServletResponse response) throws IOException {
User sessionUser = (User) session.getAttribute("user");
JSONObject jsonObj = JSONObject.parseObject(promotionWord);
HSSFWorkbook wb = promotionWordService.export(sessionUser.getId(), jsonObj);
response.setContentType("application/vnd.ms-excel");
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String fileName = "word-" + sdf.format(cal.getTime()) + ".xls";
response.setHeader("Content-disposition", "attachment;filename=" + fileName);
OutputStream ouputStream = response.getOutputStream();
wb.write(ouputStream);
ouputStream.flush();
ouputStream.close();
}
```
3.在service中需要将数据写入到格式文件中：
```java
public HSSFWorkbook export(String userId, JSONObject jsonObj) {
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("word");
HSSFRow row = sheet.createRow(0);
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
List pWordList;
Map map = new HashMap();
map.put("userId", userId);
map.put("checkExistRule", jsonObj.getString("checkExistRule"));
map.put("status", jsonObj.getString("status"));
map.put("qsStar", jsonObj.getString("qsStar"));
map.put("impressionCount", jsonObj.getString("impressionCount"));
map.put("selectGroupId", jsonObj.getString("selectGroupId"));
map.put("isCheck", jsonObj.getString("isCheck"));
map.put("word", jsonObj.getString("word"));
Long impression = jsonObj.getLong("impressionCount");
Long click = jsonObj.getLong("clickCount");
if(impression != null){
PromotionWord word = new PromotionWord();
word.setCreatedBy(userId);
word.setImpressionCount7(impression);
pWordList = getTwentyPercentlists(word);
if(pWordList != null && pWordList.size() > 0){
map.put("impressionCount", pWordList.get(pWordList.size()-1).getImpressionCount());
}else{
map.put("impressionCount", 1);
}
}else if(click != null){
PromotionWord word = new PromotionWord();
word.setCreatedBy(userId);
word.setClickCount7(click);
pWordList = getTwentyPercentlists(word);
if(pWordList != null && pWordList.size() > 0){
map.put("clickCount", pWordList.get(pWordList.size()-1).getClickCount());
}else{
map.put("clickCount", 1);
}
}
List list = commonDao.queryList(PROMOTION_WORD_DAO + ".queryExportDataByUser", map);
String[] excelHeader = {"关键词", "价格","搜索热度","推广评分","购买热度","曝光量","点击量","点击率","推广时长","花费","平均点击花费","匹配产品数","预估排名","状态"};
for (int i = 0; i 0)
for (int i = 0; i 这样之后就可以直接点击导出就有效果了。
