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springboot：整合easypoi

河北武邑中学 • 2022-12-14 • 随笔 • 阅读 9

springboot：整合easypoi,第1张

springboot：整合easypoi

文章目录
  • springboot：整合easypoi
    • 一、导出
      • pom文件
      • 实体类
      • 工具类
      • service
      • controller
      • 导出结果
    • 二、导入
      • 普通导入
        • controller 和service
        • 导入结果
      • 校验导入
        • 修改实体类
        • 自定义校验类
        • controller和service
        • 校验结果

easypoi的常用注解
easypoi的导入校验
项目源码

springboot：整合easypoi 一、导出 pom文件 

        
            cn.afterturn
            easypoi-spring-boot-starter
            4.0.0
        

        
            javax.validation
            validation-api
            2.0.1.Final
        
        
            org.hibernate.validator
            hibernate-validator
            6.0.16.Final
            compile
        
		
        
            com.hl
            springboot-common
            0.0.1-SNAPSHOT
        
        
            org.springframework.boot
            spring-boot-starter-web
实体类

CourseEntity.java

@Data
@ExcelTarget("courseEntity")
public class CourseEntity  {
    
    private String id;
    
    @Excel(name = "课程名称", orderNum = "0", width = 25, needMerge = true)
    private String name;
    
    @ExcelEntity(id = "absent")
    private TeacherEntity mathTeacher;

    @ExcelCollection(name = "学生", orderNum = "2")
    private List students;
}

StudentEntity.java

@Data
public class StudentEntity implements java.io.Serializable {
    
    private String id;
    
    @Excel(name = "学生姓名", height = 20, width = 30, isimportField = "true")
    private String name;
    
    @Excel(name = "学生性别", replace = {"男_1", "女_2"}, suffix = "生", isimportField = "true")
    private int sex;

    @Excel(name = "出生日期", exportFormat = "yyyyMMddHHmmss", format = "yyyy-MM-dd", isimportField = "true", width = 20)
    private Date birthday;
}

TeacherEntity.java

@Data
public class TeacherEntity implements java.io.Serializable {
    
    @Excel(name = "教师姓名", width = 30, orderNum = "1", isimportField = "true",needMerge = true)
    private String name;
    
    @Excel(name = "教师性别", replace = {"男_1", "女_2"}, suffix = "生", isimportField = "true", orderNum = "2",needMerge = true)
    private int sex;
}
工具类 
package com.hl.springbooteasypoi.util;

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 cn.afterturn.easypoi.excel.entity.result.ExcelimportResult;
import cn.afterturn.easypoi.excel.imports.ExcelimportService;
import cn.afterturn.easypoi.handler.inter.IExcelVerifyHandler;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;


public class ExcelUtils {

    
    public static void exportExcel(List list, String title, String sheetName,
                                   Class pojoClass, String fileName,
                                   boolean isCreateHeader, HttpServletResponse response) throws IOException {
        ExportParams exportParams = new ExportParams(title, sheetName, ExcelType.XSSF);
        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) throws IOException {
        defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName, ExcelType.XSSF));
    }

    
    public static void exportExcel(List list, Class pojoClass, String fileName, ExportParams exportParams, HttpServletResponse response) throws IOException {
        defaultExport(list, pojoClass, fileName, response, exportParams);
    }

    
    public static void exportExcel(List> list, String fileName, HttpServletResponse response) throws IOException {
        defaultExport(list, fileName, response);
    }

    
    private static void defaultExport(List list, Class pojoClass, String fileName,
                                      HttpServletResponse response, ExportParams exportParams) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
        downLoadExcel(fileName, response, workbook);
    }

    
    private static void defaultExport(List> list, String fileName, HttpServletResponse response) throws IOException {
        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
        downLoadExcel(fileName, response, workbook);
    }

    
    private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws IOException {
        ServletOutputStream out = null;
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + "." + ExcelTypeEnum.XLSX.getValue(), "UTF-8"));
            out = response.getOutputStream();
            workbook.write(out);
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }finally {
            if (out != null){
                out.close();
            }
            if (workbook != null){
                workbook.close();
            }

        }
    }

    
    public static  List importExcel(String filePath, Integer titleRows, Integer headerRows, Class pojoClass) throws IOException {
        if (StringUtils.isBlank(filePath)) {
            return null;
        }
        importParams params = new importParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        params.setNeedSave(true);
        params.setSaveUrl("/excel/");
        try {
            return ExcelimportUtil.importExcel(new File(filePath), pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new IOException("模板不能为空");
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    
    public static  List importExcel(MultipartFile file, Class pojoClass) throws IOException {
        return importExcel(file, 1, 1, pojoClass);
    }

    
    public static  List importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class pojoClass) throws IOException {
        return importExcel(file, titleRows, headerRows, false, pojoClass);
    }

    
    public static  ExcelimportResult importExcelResult(MultipartFile file, Integer titleRows, Integer headerRows,
                                                          boolean needVerfiy, IExcelVerifyHandler verifyHandler,
                                                          Class pojoClass) throws IOException {
        if (file == null) {
            return null;
        }
        if (checkExcelFormat(file)){
            InputStream in = null;
            try {
                importParams importParams = new importParams();
                importParams.setTitleRows(titleRows); // 设置标题列占几行
                importParams.setHeadRows(headerRows);  // 设置字段名称占几行 即header
                importParams.setNeedVerify(needVerfiy);//开启校验
                importParams.setVerifyHandler(verifyHandler);// 这个类是自己创建的
                importParams.setStartSheetIndex(0);  // 设置从第几张表格开始读取，这里0代表第一张表，默认从第一张表读取
                in= file.getInputStream();
                return new ExcelimportService().importExcelByIs(in, pojoClass, importParams, true);
            } catch (Exception e) {
                throw new IOException(e.getMessage());
            }finally {
                if (in != null){
                    in.close();
                }
            }
        }
        return null;
    }

    private static Boolean checkExcelFormat(MultipartFile file) throws IOException {
        //获取文件名
        String fileName = file.getOriginalFilename();
        //验证文件名是否合格(xlsx, xls, xlsm,xlt)
        //文件后缀名校验
        if (!(fileName.endsWith("xls") || fileName.endsWith("xlsx") || fileName.endsWith("xlsm") || fileName.endsWith("xlt"))) {
            throw new RuntimeException("上传文件格式不正确，请传入正确的Excel文件");
        }
        //验证导入工时的标题头是否合法
        String suffix = fileName.substring(fileName.lastIndexOf(".") + 1);
        if (!"xls".equals(suffix) && !"xlsx".equals(suffix)) {
            throw new RuntimeException("上传文件只支持xls和xlsx文件后缀");
        }
        return true;
    }

    
    public static  List importExcel(MultipartFile file, Integer titleRows, Integer headerRows, boolean needVerfiy, Class pojoClass) throws IOException {
        if (file == null) {
            return null;
        }
        try {
            return importExcel(file.getInputStream(), titleRows, headerRows, needVerfiy, pojoClass);
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }
    }

    
    public static  List importExcel(InputStream inputStream, Integer titleRows, Integer headerRows, boolean needVerfiy, Class pojoClass) throws IOException {
        if (inputStream == null) {
            return null;
        }

        importParams params = new importParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        params.setSaveUrl("/excel/");
        params.setNeedSave(true);
        params.setNeedVerify(needVerfiy);
        try {
            return ExcelimportUtil.importExcel(inputStream, pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new IOException("excel文件不能为空");
        } catch (Exception e) {
            throw new IOException(e.getMessage());
        }finally {
            if (inputStream != null){
                inputStream.close();
            }
        }
    }




    
    enum ExcelTypeEnum {
        
        XLS("xls"), XLSX("xlsx");
        private String value;

        ExcelTypeEnum(String value) {
            this.value = value;
        }

        public String getValue() {
            return value;
        }

        public void setValue(String value) {
            this.value = value;
        }
    }
}
service 
@Service
public class ExportExcelService {

    
    public HttpResponseTemp exportExcel(HttpServletResponse response) throws IOException {
        List courseEntityList = new ArrayList<>();
        CourseEntity courseEntity = new CourseEntity();
        courseEntity.setId("1");
        courseEntity.setName("测试课程");

        TeacherEntity teacherEntity = new TeacherEntity();
        teacherEntity.setName("张老师");
        teacherEntity.setSex(1);

        courseEntity.setMathTeacher(teacherEntity);

        List studentEntities = new ArrayList<>();
        for (int i = 1; i <= 2; i++) {
            StudentEntity studentEntity = new StudentEntity();
            studentEntity.setName("学生" + i);
            studentEntity.setSex(i);
            studentEntity.setBirthday(new Date());
            studentEntities.add(studentEntity);
        }
        courseEntity.setStudents(studentEntities);
        courseEntityList.add(courseEntity);
        Date start = new Date();
        String fileName = "导出文件";
        ExcelUtils.exportExcel(courseEntityList,"导出测试","测试",CourseEntity.class,fileName,true,response);

        System.out.println(System.currentTimeMillis() - start.getTime());

        return ResultStat.OK.wrap(null,"导出成功");
    }
}
controller 
@Controller
@RequestMapping("/user")
public class ExportExcelController {

    @Autowired
    private ExportExcelService exportExcelService;

    @GetMapping("/export")
    public HttpResponseTemp exportExcel(HttpServletResponse response) throws IOException {
        return exportExcelService.exportExcel(response);
    }
}
导出结果

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-5amdI3eO-1637580252521)(springboot：整合easypoi.assets/image-20211122152259679.png)]

二、导入 普通导入 controller 和service 
@Controller
@RequestMapping("/user")
public class importExcelController {

    @Autowired
    private importService importService;

    @PostMapping("/import")
    HttpResponseTemp importExcel(MultipartFile file) throws Exception {
        return importService.importExcel(file);
    }
}

@Service
public class importService {

    public HttpResponseTemp importExcel(MultipartFile file) throws Exception {
        List courseEntityList = ExcelUtils.importExcel(file,1,2,CourseEntity.class);
        System.out.println("成功导入：" + JSONUtil.toJsonStr(courseEntityList));
        return ResultStat.OK.wrap(courseEntityList,"导入成功");
    }

}
导入结果

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-kKcz7GrE-1637580252523)(springboot：整合easypoi.assets/image-20211122162005668.png)]

校验导入

现在产品需要对导入的Excel进行校验，不合法的Excel不允许入库，需要返回具体的错误信息给前端，提示给用户，错误信息中需要包含行号以及对应的错误。

因为 EasyPOI 支持 Hibernate Validator ，所以直接使用就可以了，因为要将错误信息以及错误行号返回，所以需要用到 EasyPOI 的高级用法，实现 IExcelDataModel与 IExcelModel接口，IExcelDataModel负责设置行号，IExcelModel 负责设置错误信息

修改实体类

实现 IExcelDataModel与 IExcelModel接口，并且重写其中的方法，并且自定义errorMsg和rowNum来接受下面重写接口的值

这里需要注意俩点：

1.如果要对这个字段进行校验需要 isimportField = "true"参数

2.如果想要嵌套校验，需要在被嵌套的对象上加入@Valid注解

@Data
@ExcelTarget("courseEntity")
public class CourseEntity  implements Serializable,IExcelModel,IExcelDataModel {
    
    private String id;
    
    @Excel(name = "课程名称", orderNum = "0", width = 25, needMerge = true,isimportField = "true")
    @NotBlank(message = "课程名称不能为空")
    private String name;
    
    @Valid
    @ExcelEntity(id = "absent")
    private TeacherEntity mathTeacher;

    @Valid
    @ExcelCollection(name = "学生", orderNum = "2")
    private List students;

    private String errorMsg; //自定义一个errorMsg接受下面重写IExcelModel接口的get和setErrorMsg方法。

    private Integer rowNum;  //自定义一个rowNum接受下面重写IExcelModel接口的get和setRowNum方法。

    @Override
    public String getErrorMsg() {
        return errorMsg;
    }

    @Override
    public void setErrorMsg(String errorMsg) {
        this.errorMsg = errorMsg;
    }

    @Override
    public int getRowNum() {
        return rowNum;
    }

    @Override
    public void setRowNum(int rowNum) {
        this.rowNum = rowNum;
    }

}

@Data
public class StudentEntity implements java.io.Serializable {
    
    private String id;
    
    @Excel(name = "学生姓名",width = 30, isimportField = "true")
    @NotBlank(message = "学生姓名不可以为空")
    private String name;
    
    @Excel(name = "学生性别", replace = {"男_1", "女_2"}, suffix = "生", isimportField = "true")
    private int sex;

    @Excel(name = "出生日期", exportFormat = "yyyy-MM-dd", format = "yyyy-MM-dd", isimportField = "true", width = 20)
    private Date birthday;
}

@Data
public class TeacherEntity implements java.io.Serializable {
    
    @Excel(name = "教师姓名", width = 30, orderNum = "1", isimportField = "true",needMerge = true)
    @NotBlank(message = "教师姓名不可以为空")
    private String name;
    
    @Excel(name = "教师性别", replace = {"男_1", "女_2"}, suffix = "生", isimportField = "true", orderNum = "2",needMerge = true)
    @NotNull(message = "教师性别不可以为空")
    private int sex;
}
自定义校验类 
package com.hl.springbooteasypoi.verifyHandler;

import cn.afterturn.easypoi.excel.entity.result.ExcelVerifyHandlerResult;
import cn.afterturn.easypoi.handler.inter.IExcelVerifyHandler;
import com.hl.springbooteasypoi.pojo.CourseEntity;


public class MyVerifyHandler implements IExcelVerifyHandler {

    @Override
    public ExcelVerifyHandlerResult verifyHandler(CourseEntity courseEntity) {
        ExcelVerifyHandlerResult result = new ExcelVerifyHandlerResult();
        //假设我们要添加用户，
        //现在去数据库查询getName，如果存在则表示校验不通过。
        //假设现在数据库中有个getName 测试课程
        if ("测试课程".equals(courseEntity.getName())) {
            result.setMsg("该课程已存在");
            result.setSuccess(false);
            return result;
        }
        result.setSuccess(true);
        return result;
    }
}
controller和service 
public HttpResponseTemp checkimportExcel(MultipartFile file) throws IOException {
        ExcelimportResult excelimportResult = ExcelUtils.importExcelResult(file, 1, 2, true, new MyVerifyHandler(), CourseEntity.class);
        //成功导入
        List list = excelimportResult.getList();
        //失败导入
        List failList = excelimportResult.getFailList();
        HashSet set = new HashSet<>();
        for (CourseEntity courseEntity : failList) {
            int rowNum = courseEntity.getRowNum();
            String errorMsg = courseEntity.getErrorMsg();
            String msg = "第" + rowNum + "行的错误是:" + errorMsg;
            set.add(msg);
        }
        System.out.println("导入成功：" + JSONUtil.toJsonStr(list));
        System.out.println("导入失败：" + JSONUtil.toJsonStr(failList));
        System.out.println("错误信息：" + JSONUtil.toJsonStr(set));
        return ResultStat.OK.wrap(null,"导入成功");
    }

@Controller
@RequestMapping("/user")
public class importExcelController {

    @Autowired
    private importService importService;

    @PostMapping("/checkimport")
    HttpResponseTemp checkimportExcel(MultipartFile file) throws Exception {
        return importService.checkimportExcel(file);
    }
}
校验结果

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-5KtmdsaM-1637580252524)(springboot：整合easypoi.assets/image-20211122192307115.png)]

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原文地址: https://outofmemory.cn/zaji/5576212.html

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