easypoi official document: http://easypoi.mydoc.io/
https://blog.csdn.net/thinkingcao/article/details/85005930
1. pom
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-base</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-web</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-annotation</artifactId>
<version>3.2.0</version>
</dependency>
2. The definitions need to be exported entity object User
@ExcelTarget("20")
@Setter
@Getter
@ToString
public class User implements java.io.Serializable{
@Excel(name = "id", width=15)
@NotBlank(message = "该字段不能为空")
private Integer id;
@Excel(name = "姓名", orderNum = "0", width=30)
private String name;
@Excel(name = "性别", replace = { "男_1", "女_2" }, orderNum = "1", width=30)
private String sex;
@Excel(name = "生日", exportFormat = "yyyy-MM-dd", orderNum = "2", width=30)
private String birthday;
3. Excel import and export tools
import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
//Excel导入导出工具类
public class ExcelUtils {
public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
boolean isCreateHeader, HttpServletResponse response) {
ExportParams exportParams = new ExportParams(title, sheetName);
exportParams.setCreateHeadRows(isCreateHeader);
defaultExport(list, pojoClass, fileName, response, exportParams);
}
public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
HttpServletResponse response) {
defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
}
public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
defaultExport(list, fileName, response);
}
private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response,
ExportParams exportParams) {
Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
if (workbook != null)
;
downLoadExcel(fileName, response, workbook);
}
private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
try {
response.setCharacterEncoding("UTF-8");
response.setHeader("content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
workbook.write(response.getOutputStream());
} catch (IOException e) {
// throw new NormalException(e.getMessage());
}
}
private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
if (workbook != null)
;
downLoadExcel(fileName, response, workbook);
}
public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) {
if (StringUtils.isBlank(filePath)) {
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List<T> list = null;
try {
list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
} catch (NoSuchElementException e) {
// throw new NormalException("模板不能为空");
} catch (Exception e) {
e.printStackTrace();
// throw new NormalException(e.getMessage());
}
return list;
}
public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows,
Class<T> pojoClass) {
if (file == null) {
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List<T> list = null;
try {
list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
} catch (NoSuchElementException e) {
// throw new NormalException("excel文件不能为空");
} catch (Exception e) {
// throw new NormalException(e.getMessage());
System.out.println(e.getMessage());
}
return list;
}
}
@Service
public class UserService {
public List<User> findAll() {
List<User> listAll = Lists.newArrayList();
List<User> list = Lists.newArrayList();
User user = new User();
user.setId(10);
user.setName("张三");
user.setSex("男");
user.setBirthday(new Date().toString());
User user1 = new User();
user1.setId(20);
user1.setName("李四");
user1.setSex("男");
user1.setBirthday(new Date().toString());
user.setBirthday(new Date().toString());
User user2 = new User();
user2.setId(20);
user2.setName("王五");
user2.setSex("男");
user2.setBirthday(new Date().toString());
list.add(user);
list.add(user1);
list.add(user2);
listAll.addAll(list);
return listAll;
}
}
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.thinkingcao.demo.easypoi.entity.User;
import com.thinkingcao.demo.easypoi.service.UserService;
import com.thinkingcao.demo.easypoi.utils.ExcelUtils;
/**
* <pre>
* @author cao_wencao
* @date 2018年12月13日 下午6:16:59
* </pre>
*/
@RestController
@RequestMapping("/excel/export")
public class ExcelExportController {
@Autowired
private UserService userService;
@GetMapping("/exportExcel")
public void export(HttpServletResponse response) {
System.out.println(1);
// 模拟从数据库获取需要导出的数据
List<User> personList = userService.findAll();
// 导出操作
ExcelUtils.exportExcel(personList, "easypoi导出功能", "导出sheet1", User.class, "测试user.xls", response);
}
8. The method of introducing the Controller. ExcelImportController
@RestController
@RequestMapping("/excel/import")
@Slf4j
public class ExcelImportController {
@PostMapping("/importExcel")
public String importExcel2(@RequestParam("file") MultipartFile file) {
ImportParams importParams = new ImportParams();
// 数据处理
importParams.setHeadRows(1);
importParams.setTitleRows(1);
// 需要验证
importParams.setNeedVerfiy(false);
try {
ExcelImportResult<User> result = ExcelImportUtil.importExcelMore(file.getInputStream(), User.class,
importParams);
List<User> userList = result.getList();
for (User User : userList) {
// System.out.println(User);
log.info("从Excel导入数据到数据库的详细为 ：{}", JSONObject.toJSONString(User));
//TODO 将导入的数据做保存数据库操作
}
log.info("从Excel导入数据一共 {} 行 ", userList.size());
} catch (IOException e) {
log.error("导入失败：{}", e.getMessage());
} catch (Exception e1) {
log.error("导入失败：{}", e1.getMessage());
}
return "导入成功";
}
}
问题： 报错 Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported
Start controller method is written
@RequestMapping( value = "/add", method = RequestMethod.POST )
public String add( @RequestBody Map<String, Object> params ) {
Change
@RequestMapping( value = "/add", method = RequestMethod.POST )
public String add( @RequestParam Map<String, Object> params ) {
Not being given.
Question: Export error
1. Do not go merged cell, unless the content is known (to write) of
2. After setting style, the number of the style lines provided must be greater than the length of the set of
99.99% of people in this error is to of a merged cell