关于EasyPoi导出Excel
如果你觉得Easypoi不好用,喜欢用传统的poi,可以参考我的这篇博客:Springmvc导出Excel(maven)
当然了,万变不离其宗。Easypoi的底层原理还是poi。正如MyBatis Plus的原理还是MyBatis那套。只不过它们的共同点是封装起来。
关于Easypoi记得初次接触的时候,给我的感觉是看起来很简单很容易让人理解,而且文档也比较丰富,也是jeecg的开源项目下的子项目。
记得当初为了提高代码开发效率,去码云和github上游荡游荡,突然发现了一个叫jeecg的玩意,于是研究了下,这个研究不是特别深,只是将其项目跑起来,看看它有哪些组件,顺便看看源码,和玩玩它强大的插件式开发和easypoi。
jeecg中的easypoi的项目地址为:https://gitee.com/jeecg/jeasypoi
jeecg中的easypoi的官方详细文档为:http://easypoi.mydoc.io/
大家要牢记一个经济方面的格言:物质基础决定上层建筑。
对计算机专业的同志们而言,良好的计算机基础,是以后编程世界的驰骋飞扬的基石。
所以在校的同志们,一定要好好学习天天向上。
闲话就不多说了,下面进入正题。
一、导入依赖
<!-- easypoi导入导出excel --> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-base</artifactId> <version>3.1.0</version> </dependency> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-web</artifactId> <version>3.1.0</version> </dependency> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-annotation</artifactId> <version>3.1.0</version> </dependency>
二、构建实体
@ExcelTarget("FinanceTrade") @TableName("rms_finance_trade") public class FinanceTrade extends Model<FinanceTrade> { private static final long serialVersionUID = 1L; @TableId("trade_no") private String tradeNo; @Excel(name="订单号") @TableField("order_no") private String orderNo; /** * 用户id */ @TableField("user_id") private String userId; /** * 交易创建时间 */ @Excel(name="创建时间",width=30) @TableField("create_time") private String createTime; /** * 实际支付金额 */ @Excel(name="实际支付金额") private BigDecimal amount; /** * 交易状态支付成功转入退款未支付已关闭已撤销支付失败 */ private String status; /** * 流水标题 */ private String subject; @TableField("finish_time") private String finishTime; /** * 类型:余额支付balance、微信支付wx */ private String type; /** * 资金流向:1:收入 ;0:支出 */ private String flows; /** * 备注 */ private String remarks; /** * 支付类型:余额,微信,混合支付等 */ @TableField(exist=false) @Excel(name="支付类型") private String payType; /** * 费用名称 */ @TableField(exist=false) @Excel(name="费用名称") private String amountType; @TableField(exist=false) private String leafNode; @TableField(exist=false) private String address; @TableField(exist=false) private String node; @TableField(exist=false) private String subNode; @TableField(exist=false) @Excel(name="账户",width=30) public String loginCode; @TableField(exist=false) @Excel(name="支付人") public String userName; /** * 公司编码 * @return */ @TableField(value="company_code") private String companyCode; /** * 用户 */ @TableField(exist=false) List<SysUser> sysUser; /** * 订单 */ @TableField(exist=false) List<FinanceOrder> order; public String getLoginCode() { return loginCode; } public void setLoginCode(String loginCode) { this.loginCode = loginCode; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getLeafNode() { return leafNode; } public void setLeafNode(String leafNode) { this.leafNode = leafNode; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getNode() { return node; } public void setNode(String node) { this.node = node; } public String getSubNode() { return subNode; } public void setSubNode(String subNode) { this.subNode = subNode; } public String getPayType() { return payType; } public void setPayType(String payType) { this.payType = payType; } public String getAmountType() { return amountType; } public void setAmountType(String amountType) { this.amountType = amountType; } public String getCompanyCode() { return companyCode; } public void setCompanyCode(String companyCode) { this.companyCode = companyCode; } public String getTradeNo() { return tradeNo; } public void setTradeNo(String tradeNo) { this.tradeNo = tradeNo; } public String getOrderNo() { return orderNo; } public void setOrderNo(String orderNo) { this.orderNo = orderNo; } public String getUserId() { return userId; } public void setUserId(String userId) { this.userId = userId; } public String getCreateTime() { return createTime; } public void setCreateTime(String createTime) { this.createTime = createTime; } public BigDecimal getAmount() { return amount; } public void setAmount(BigDecimal amount) { this.amount = amount; } public String getStatus() { return status; } public void setStatus(String status) { this.status = status; } public String getSubject() { return subject; } public void setSubject(String subject) { this.subject = subject; } public String getFinishTime() { return finishTime; } public void setFinishTime(String finishTime) { this.finishTime = finishTime; } public String getType() { return type; } public void setType(String type) { this.type = type; } public String getFlows() { return flows; } public void setFlows(String flows) { this.flows = flows; } public String getRemarks() { return remarks; } public void setRemarks(String remarks) { this.remarks = remarks; } @Override protected Serializable pkVal() { return this.tradeNo; } public List<SysUser> getSysUser() { return sysUser; } public void setSysUser(List<SysUser> sysUser) { this.sysUser = sysUser; } public List<FinanceOrder> getOrder() { return order; } public void setOrder(List<FinanceOrder> order) { this.order = order; } @Override public String toString() { return "FinanceTrade [tradeNo=" + tradeNo + ", orderNo=" + orderNo + ", userId=" + userId + ", createTime=" + createTime + ", amount=" + amount + ", status=" + status + ", subject=" + subject + ", finishTime=" + finishTime + ", type=" + type + ", flows=" + flows + ", remarks=" + remarks + ", payType=" + payType + ", amountType=" + amountType + ", leafNode=" + leafNode + ", address=" + address + ", node=" + node + ", subNode=" + subNode + ", companyCode=" + companyCode + "]"; } }
- @Excel 作用到filed上面,是对Excel一列的一个描述
- @ExcelCollection 表示一个集合,主要针对一对多的导出,比如一个老师对应多个科目,科目就可以用集合表示
- @ExcelEntity 表示一个继续深入导出的实体,但他没有太多的实际意义,只是告诉系统这个对象里面同样有导出的字段
- @ExcelIgnore 和名字一样表示这个字段被忽略跳过这个导导出
- @ExcelTarget 这个是作用于最外层的对象,描述这个对象的id,以便支持一个对象可以针对不同导出做出不同处理
上面截图我只是截取官方文档上的一部分,大家想详细知道,可参考官方文档:http://easypoi.mydoc.io/#text_197835
三、编写对应的Controller
@Controller @RequestMapping(value = "easypoi") public class ExportExcelTest { @Autowired private FinanceTradeService financeTradeService; /** * 导出Excel 营业收入支出明细 * @param companyCode * @param flows * @param response * @return */ @GetMapping(value="exportBillDatailInfo") @ResponseBody public String exportBillDatailInfo(HttpServletRequest request,HttpServletResponse response){ String companyCode = request.getParameter("companyCode"); String flows = request.getParameter("flows"); System.out.println("companyCode:"+companyCode); System.out.println("flows:"+flows); // 获取workbook对象 // 单sheet或多sheet 只需要更改此处即可 Workbook workbook = exportSheets(companyCode,flows) ; // 判断数据 if(workbook == null) { return "fail"; } // 设置excel的文件名称 String excelName = "测试excel" ; // 重置响应对象 response.reset(); // 当前日期,用于导出文件名称 SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd"); String dateStr = "["+excelName+"-"+sdf.format(new Date())+"]"; // 指定下载的文件名--设置响应头 response.setHeader("Content-Disposition", "attachment;filename=" +dateStr+".xls"); response.setContentType("application/vnd.ms-excel;charset=UTF-8"); response.setHeader("Pragma", "no-cache"); response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expires", 0); // 写出数据输出流到页面 try { OutputStream output = response.getOutputStream(); BufferedOutputStream bufferedOutPut = new BufferedOutputStream(output); workbook.write(bufferedOutPut); bufferedOutPut.flush(); bufferedOutPut.close(); output.close(); } catch (IOException e) { e.printStackTrace(); } return "success"; } /** * 多sheet导出 * @return */ public Workbook exportSheets(String companyCode,String flows){ //将条件放入Map中 Map<String,Object> conditionMap = new HashMap<String,Object>(); conditionMap.put("companyCode", companyCode); conditionMap.put("flows", flows); conditionMap.put("start", 0); conditionMap.put("size", 100); //获得营业明细(含收支)信息 List<FinanceTrade> list = financeTradeService.getSpeedingDetailInfo(conditionMap); // 创建参数对象(用来设定excel得sheet得内容等信息) ExportParams params1 = new ExportParams() ; // 设置sheet得名称 params1.setSheetName("营业收支明细"); ; // 创建sheet1使用得map Map<String,Object> dataMap1 = new HashMap<>(); // title的参数为ExportParams类型,目前仅仅在ExportParams中设置了sheetName dataMap1.put("title",params1) ; // 模版导出对应得实体类型 dataMap1.put("entity",FinanceTrade.class) ; // sheet中要填充得数据 dataMap1.put("data",list) ; // 将sheet1和sheet2使用得map进行包装 List<Map<String, Object>> sheetsList = new ArrayList<>() ; sheetsList.add(dataMap1); // 执行方法 return ExcelExportUtil.exportExcel(sheetsList, ExcelType.HSSF) ; } }
小结:上面主要是关于Spring+MyBatis Plus+SpringMVC+EasyPoi+MySQL,更多简单例子可以去官方文档上看或者参照下面博客地址也可以:
EasyPoi导入导出:https://www.cnblogs.com/xiexy/p/8044393.html
EasyPoi导出示例:http://www.leftso.com/blog/329.html(该例非常简单,很通俗易懂)