EasyExcel 通过模板 导入、导出、下载模板
java
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.Pattern;
import java.io.Serializable;
/**
* @author ext.libo15
* @title: 导入员工花名册
*/
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
@HeadRowHeight(value = 40)
public class StudentExcel implements Serializable {
private static final long serialVersionUID = -5144055068797033748L;
/**
* 姓名
*/
@ExcelProperty(value = "姓名", index = 0)
@ColumnWidth(value = 20)
@NotBlank(message="姓名不能为空")
private String name;
/**
* 性别 1：男 ：2女
*/
@ExcelProperty(value = "性别\r1：男 ：2女", index = 1)
@ColumnWidth(value = 20)
@NotBlank(message="性别不能为空")
private String gender;
/**
* 出生日期
*/
@ExcelProperty(value = "出生日期", index = 2)
@ColumnWidth(value = 20)
@NotBlank(message="出生日期不能为空")
@DateTimeStr(format ="yyyy-MM-dd", message = "出生日期格式错误，正确格式为：yyyy-MM-dd")
private String birthday;
/**
* 年龄
*/
@ExcelProperty(value = "年龄", index = 3)
@ColumnWidth(value = 20)
@NotBlank(message="年龄不能为空")
private String age;
/**
* 身份证号码
*/
@ExcelProperty(value = "身份证号码", index = 4)
@ColumnWidth(value = 20)
@NotBlank(message="身份证号码不能为空")
@Pattern(regexp = "^\\d{15}$|^\\d{17}[0-9Xx]$",message = "身份证格式不正确!")//长度18，0-9
private String cardNo;
/**
* 联系电话
*/
@ExcelProperty(value = "联系电话", index = 5)
@ColumnWidth(value = 20)
@NotBlank(message="联系电话不能为空")
@Pattern(regexp = "^[1][3,4,5,7,8][0-9]{9}$",message = "联系电话格式不正确!")//长度11
private String telephone;
/**
* 是否已婚 1：是 2：否
*/
@ExcelProperty(value = "是否已婚", index = 6)
@ColumnWidth(value = 20)
@NotBlank(message="是否已婚不能为空")
private String marryStatus;
/**
* 银行卡号
*/
@ExcelProperty(value = "银行卡号", index = 8)
@ColumnWidth(value = 20)
@NotBlank(message="银行卡号不能为空")
@Pattern(regexp = "^([1-9]{1})(\\d{14}|\\d{18})$",message = "银行卡号格式不正确!")//长度11
private String bankCardNo;
Student 对象（你的业务对象，就是数据库对应的对象）
java
public class Student implements Serializable {
private static final long serialVersionUID = -5144055068797033748L;
/**
* 姓名
*/
private String name;
/**
* 性别 1：男 ：2女
*/
private int gender;
/**
* 出生日期
*/
private Date birthday;
/**
* 年龄
*/
private int age;
/**
* 身份证号码
*/
private String cardNo;
/**
* 联系电话
*/
private String telephone;
/**
* 是否已婚 1：是 2：否
*/
private int marryStatus;
/**
* 银行卡号
*/
private String bankCardNo;
/**
* 时间
*/
private Date dimissionDate;Controller 代码：
java
/**
* 导入
*/
@RequestMapping(value="/import")
public void importExcel(HttpServletRequest request, HttpServletResponse response,@RequestBody MultipartFile file) throws Exception {
staffManageService.importExcel(file);
}
/**
* 导出
*/
@RequestMapping(value="/export",method = RequestMethod.POST)
public void batchExport(HttpServletResponse response) throws ParseException {
staffManageService.export(response,staffRosterVo);
}
/**
* 下载模板
*
* @param
* @return
* @throws Exception
* @author ext.libo15
*/
@GetMapping(value="/download")
public void download(HttpServletRequest request, HttpServletResponse response) throws FileNotFoundException {
FileUtil.downloadExcel(request,response);
}
}2.下载模板
这里其实 Controller + FileUtil 工具类，下载模板的操作已经做好了。工具类我放最下面了
**
3.导入
**
java
/**
* 导入
* @param file
*/
@Override
public void importExcel(MultipartFile file) throws Exception {
List<Student> ExcelList = null;
String validate = "";
//校验文件大小 100M
boolean size = FileUtil.checkFileSize(file.getSize(), 100, "M");
if(size == false){
//文件过大啦，只能100M
}
//excel读取数据
staffExcelList = EasyExcel.read(new BufferedInputStream(file.getInputStream())).head(StaffDataExcel.class).sheet().doReadSync();
if (ExcelList.size() > 1000) {
//最多导入1000条哦
}
// excel数据校验
validate = ValidatorUtils.beanValidate(ExcelList);
if(!validate.equals("success")){
//参数异常提示 如：姓名不能为空哦~
}
//把Excel数据转换成你对应的对象集合List
List<Student> studentList = ExcelUtil.excelListConvertList(ExcelList);
//拿到数据后就可以 入库操作啦 -----我自己的入库就不给你们写了
StudentService.importExcel(studentList );
}4.导出
java
/**
* 导出
* @param response
* @param staffRosterVo
* @return
* @throws ParseException
*/
@Override
public void export(HttpServletResponse response) throws ParseException {
String fileName = "导出的文件名称";
String sheetName = "导出的 sheetName ";
List<Student> list = studentService.findList();
List<StaffDataExportExcel> studentExcelList = ExcelUtil.listConvertexcelList(list );
try {
ExcelUtil.writeExcel(response, studentExcelList , fileName, sheetName, StaffDataExportExcel.class);
} catch (Exception e) {
e.printStackTrace();
}
}5.工具类 FileUtil ：
java
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
public class FileUtil {
/**
* 判断文件大小
*
* @param len
* 文件长度
* @param size
* 限制大小
* @param unit
* 限制单位（B,K,M,G）
* @return
*/
public static boolean checkFileSize(Long len, int size, String unit) {
// long len = file.length();
double fileSize = 0;
if ("B".equals(unit.toUpperCase())) {
fileSize = (double) len;
} else if ("K".equals(unit.toUpperCase())) {
fileSize = (double) len / 1024;
} else if ("M".equals(unit.toUpperCase())) {
fileSize = (double) len / 1048576;
} else if ("G".equals(unit.toUpperCase())) {
fileSize = (double) len / 1073741824;
}
if (fileSize > size) {
return false;
}
return true;
}
public static void downLoadFile(String filePath, String fileName, HttpServletResponse response) {
try (InputStream inStream = new FileInputStream(filePath);
OutputStream os = response.getOutputStream()) {
response.setHeader("Content-Disposition", "attachment; fileName=" + URLEncoder.encode(fileName, "UTF-8"));
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
response.setCharacterEncoding("utf-8");
byte[] buff = new byte[100];
int len;
while ((len = inStream.read(buff)) > 0) {
os.write(buff, 0, len);
}
os.flush();
} catch (Exception e) {
e.Exception ();
}
}
//下载模板
public static void downloadExcel(HttpServletRequest request, HttpServletResponse response){
//方法一：直接下载路径下的文件模板（这种方式貌似在SpringCloud和Springboot中，打包成JAR包时，无法读取到指定路径下面的文件，不知道记错没，你们可以自己尝试下！！！）
try {
//文件名称
String fileName = "importStaffRoster.xlsx";
//设置要下载的文件的名称
response.setHeader("Content-disposition", "attachment;fileName=" + fileName);
//通知客服文件的MIME类型
response.setContentType("application/vnd.ms-excel;charset=UTF-8");
//获取文件的路径
String filePath = FileUtil.class.getResource("/template/" + fileName).getPath();
FileInputStream input = new FileInputStream(filePath);
OutputStream out = response.getOutputStream();
byte[] b = new byte[2048];
int len;
while ((len = input.read(b)) != -1) {
out.write(b, 0, len);
}
//修正 Excel在"xxx.xlsx"中发现不可读取的内容。是否恢复此工作薄的内容？如果信任此工作簿的来源，请点击"是"
response.setHeader("Content-Length", String.valueOf(input.getChannel().size()));
input.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}6.工具类 ValidatorUtils （导入的时候参数校验）
java
import cn.hutool.core.lang.Assert;
import org.apache.commons.lang3.ObjectUtils;
import javax.validation.ConstraintViolation;
import javax.validation.Valid;
import javax.validation.Validation;
import javax.validation.Validator;
import java.util.*;
public class ValidatorUtils {
private static final Validator validator = Validation.buildDefaultValidatorFactory()
.getValidator();
public static String beanValidate(@Valid Object obj) throws IllegalArgumentException {
if (obj instanceof Collection) {
ValidCollection<Object> validCollection = new ValidCollection<>();
validCollection.setList((Collection) obj);
return validate(validCollection);
} else {
return validate(obj);
}
}
public static String validate(@Valid Object obj) {
try {
Map<String, String> validatedMsg = new HashMap<>();
Set<ConstraintViolation<Object>> constraintViolations = validator.validate(obj);
String validate = "";
String message = "";
for (ConstraintViolation<Object> c : constraintViolations) {
validate = c.getPropertyPath().toString();
validate = validate.substring(5,6);
int unm = Integer.valueOf(validate) +1;
validatedMsg.put( "表格第"+unm+"条 ", c.getMessage());
}
Assert.isTrue(ObjectUtils.isEmpty(constraintViolations), validatedMsg.toString());
} catch (IllegalArgumentException e) {
e.printStackTrace();
return e.getMessage();
}
return "success";
}
private static class ValidCollection<T> {
@Valid
private Collection<T> list;
public Collection<T> getList() {
return list;
}
public void setList(Collection<T> list) {
this.list = list;
}
}
}工具类
java
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.support.ExcelTypeEnum;
import com.alibaba.excel.write.metadata.style.WriteCellStyle;
import com.alibaba.excel.write.style.HorizontalCellStyleStrategy;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import javax.servlet.http.HttpServletResponse;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
public class ExcelUtil {
/**
* 导出
* @param response
* @param data
* @param fileName
* @param sheetName
* @param clazz
* @throws Exception
*/
public static void writeExcel(HttpServletResponse response, List<? extends Object> data, String fileName, String sheetName, Class clazz) throws Exception {
//表头样式
WriteCellStyle headWriteCellStyle = new WriteCellStyle();
//设置表头居中对齐
headWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);
//内容样式
WriteCellStyle contentWriteCellStyle = new WriteCellStyle();
//设置内容靠左对齐
contentWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.LEFT);
HorizontalCellStyleStrategy horizontalCellStyleStrategy = new HorizontalCellStyleStrategy(headWriteCellStyle, contentWriteCellStyle);
EasyExcel.write(getOutputStream(fileName, response), clazz).excelType(ExcelTypeEnum.XLSX).sheet(sheetName).registerWriteHandler(horizontalCellStyleStrategy).doWrite(data);
}
private static OutputStream getOutputStream(String fileName, HttpServletResponse response) throws Exception {
fileName = URLEncoder.encode(fileName, "UTF-8");
response.setContentType("application/vnd.ms-excel");
response.setCharacterEncoding("utf8");
response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");
return response.getOutputStream();
}
/*
* Excel转换实体类对象
*/
public static List<Student> excelListConvertList(List<StudentExcel> studentExcelList) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
List<Student> list = new ArrayList<>();
for (StudentExcel s : studentExcelList) {
Student student = Student.builder()
.name(staffDataExcel.getname())
.age(staffDataExcel.age())
.city(staffDataExcel.getCity())
.sex(staffDataExcel.getsex().equals("男")?1:2)
.birthday(sdf.parse(staffDataExcel.getBirthday()))
.build();
list.add(student);
}
return list ;
}
/*
* 导出的List集合 转换 Excel
*/
public static List<StudentExportExcel> listConvertexcelList(List<Student> student) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
List<StudentExcel> list= new ArrayList<>();
for (Student s : student) {
StudentExcel excel = StudentExcel.builder()
.name(staffDataExcel.getname())
.age(staffDataExcel.age())
.city(staffDataExcel.getCity())
.sex(staffDataExcel.getsex().equals("男")?1:2)
.birthday(sdf.parse(staffDataExcel.getBirthday()))
.build();
.build();
list.add(excel);
}
return list;
}
}7.校验日期注解
java
import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.*;
@Target({ElementType.FIELD, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Constraint(validatedBy = CheckDateTimeCaseValidator.class)
public @interface DateTimeStr {
String message() default "{javax.validation.constraints.DateTimeStr.message}";
String format() default "yyyy-MM-dd";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}