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。

本文由博客群发一文多发等运营工具平台 OpenWrite 发布

出处：

https://www.cnblogs.com/longxing520/p/14078653.html