springboot项目整合easypoi实现导入导出功能

导入依赖

在导入依赖钱看是否项目中存在poi相关的版本。直接从pom文件中去除exclusion。

本次使用的是4.2.0 。maven依赖如下：

<dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-spring-boot-starter</artifactId>
            <version>4.2.0</version>

        </dependency>
        <dependency>
            <groupId>org.hibernate.validator</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>6.1.6.Final</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>4.1.0</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-base</artifactId>
            <version>4.0.0</version>
            <exclusions>
                <exclusion>
                    <groupId>com.google.guava</groupId>
                    <artifactId>guava</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.6</version>
        </dependency>

貌似没用到easypoi-base 。先不管了

按照官方说明。创建实体

官方文档;

public class MaterialExport implements Serializable {
// 物资名称
    @Excel(name = "物资名称", width = 15)
    private String name;
    // 物资规格
    @Excel(name = "物资规格")
    private String specs;
    // 物资类型
    @Excel(name = "物资类型")
    private String type;

    // 单位
    @Excel(name = "单位")
    private String unit;
    // 库存
    @Excel(name = "库存")
    private long num;
    
    //单价
    @Excel(name = "单价")
    private BigDecimal unitprice;
    // 厂家
    @Excel(name = "厂家", width = 20)
    private String manufactor;
    // 库存位置
    @Excel(name = "库存位置", width = 20)
    private String address;
    // 用途
    @Excel(name = "用途", width = 20)
    private String purpose;

    @Excel(name = "入库时间",format = "yyyy年MM月dd日", width = 25)
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss")
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date createTime;

    // 备注
    @Excel(name = "备注", width = 40)
    private String remarks;
    //getter setter方法省略。

｝

在导入时需要注意：实体中用到的属性为java基本属性或者是在“java.lang”、“java.math”、“java.sql”、“java.util”包中具体easypoi中逻辑代码为：

/**
     * 是不是java基础类
     *
     * @param field
     * @return
     */
    public static boolean isJavaClass(Field field) {
        Class<?> fieldType = field.getType();
        boolean isBaseClass = false;
        if (fieldType.isArray()) {
            isBaseClass = false;
        } else if (fieldType.isPrimitive() || fieldType.getPackage() == null
                   || "java.lang".equals(fieldType.getPackage().getName())
                   || "java.math".equals(fieldType.getPackage().getName())
                   || "java.sql".equals(fieldType.getPackage().getName())
                   || "java.util".equals(fieldType.getPackage().getName())) {
            isBaseClass = true;
        }
        return isBaseClass;
    }

导出功能

获取数据后直接调用Util方法
controller：

public Result export(HttpServletRequest request, HttpServletResponse response) {
        System.out.println(sdf.format(new Date()));
        //此处为从数据库获取list
         List<MaterialExport> materialExports = materialService.export();
        response.setContentType("application/vnd.ms-excel");
        OutputStream out = null;
        try {
            response.setHeader("Content-disposition",
                    "attachment;filename=" + URLEncoder.encode("物资导出" + sdf.format(new Date()) + ".xls","ISO-8859-1" ));
            Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams("物资库存信息", "物资"),

                    MaterialExport.class, materialExports);
            out = response.getOutputStream();
            workbook.write(out);
        } catch (Exception e) {
            System.out.println(e.getMessage());
            System.out.println(e);
        } finally {
            try {
                if (out != null)
                    out.close();
            } catch (IOException e) {
            }
        }

        return Response.success();
    }

导入

从文件流中获取数据用easypoi解析数据：

    public Result inport(HttpServletRequest request,@RequestParam("file") MultipartFile fileItem) {
    ImportParams importParams = new ImportParams();
      
        importParams.setHeadRows(2);
        // 获取模板
        ExcelImportResult<MaterialExport> data = null;
        try {
            data = ExcelImportUtil.importExcelMore(fileItem.getInputStream(), MaterialExport.class, importParams);
        } catch (Exception e) {
            e.printStackTrace();
        }

        // 获取模板数据
        List<MaterialExport> successList = data.getList();
        int total = successList.size();
        // 循环数据
        System.out.println(total);
        for (MaterialExport excelDTO : successList) {
            System.out.println(excelDTO.toString());
        }
        return Response.success();
    }

完毕。

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