com.alibaba
fastjson
1.2.47
四、监听
/**
* EasyExcel 导入监听
*/
public class ExcelListener extends AnalysisEventListener {
//可以通过实例获取该值
private List datas = new ArrayList();
@Override
public void invoke(Object o, AnalysisContext analysisContext) {
datas.add(o);//数据存储到list，供批量处理，或后续自己业务逻辑处理。
doSomething(o);//根据自己业务做处理
}
private void doSomething(Object object) {
//1、入库调用接口
}
public List getDatas() {
return datas;
}
public void setDatas(List datas) {
this.datas = datas;
}
@Override
public void doAfterAllAnalysed(AnalysisContext analysisContext) {
// datas.clear();//解析结束销毁不用的资源
}
}
五、接口导入Excel
try {
//获取文件名
String filename = file.getOriginalFilename();
//获取文件流
InputStream inputStream = file.getInputStream();
//实例化实现了AnalysisEventListener接口的类
ExcelListener listener = new ExcelListener();
//传入参数
ExcelReader excelReader = new ExcelReader(inputStream, ExcelTypeEnum.XLS, null, listener);
//读取信息
excelReader.read(new Sheet(1, 0, Test.class));
//获取数据
List list = listener.getDatas();
if (list.size() > 1) {
for (int i = 0; i < list.size();
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i++) {
Testobj = (Test) list.get(i);
JSONObject jo = new JSONObject();
}
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
六、接口导出Excel (HttpServletResponse response, HttpServletRequest request)
try {
String filenames = “111111”;
String userAgent = request.getHeader(“User-Agent”);
if (userAgent.contains(“MSIE”) || userAgent.contains(“Trident”)) {
filenames = URLEncoder.encode(filenames, “UTF-8”);
} else {
filenames = new String(filenames.getBytes(“UTF-8”), “ISO-8859-1”);
}
response.setContentType(“application/vnd.ms-exce”);
response.setCharacterEncoding(“utf-8”);
response.addHeader(“Content-Disposition”, “filename=” + filenames + “.xlsx”);
EasyExcel.write(response.getOutputStream(), Test.class).sheet(“sheet”).doWrite(testList);
} catch (Exception e) {
}
七、本地导入、本地导出
List testList = new ArrayList<>();
try {
String strUrl = “C:\Users\Administrator\Desktop\json.xlsx”;
File multipartFile = new File(strUrl);
InputStream inputStream = new FileInputStream(multipartFile);
//实例化实现了AnalysisEventListener接口的类
ExcelListener listener = new ExcelListener();
//传入参数
ExcelReader excelReader = new ExcelReader(inputStream, ExcelTypeEnum.XLS, null, listener);
//读取信息
excelReader.read(new Sheet(1, 0, Test.class));
//获取数据
List list = listener.getDatas();
if (list.size() > 1) {
for (int i = 0; i < list.size(); i++) {
Testobj = (Test) list.get(i);
}
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
try {
String strUrl = “C:\Users\Administrator\Desktop\json”+System.currentTimeMillis()+".xlsx";
EasyExcel.write(strUrl,Test.class).sheet(“sheet”).doWrite(testList);
} catch (Exception e) {
}
以上就是EasyExcel的基础使用过程，欢迎点赞关注交流。
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