excel导出功能

基于springmvc的easypoi简单使用

最近要做一些excel导入导出的工作，就花时间研究了一下，官方文档实在是有点不足，在这里分享一下研究成果

项目框架，SSM框架，基础框架是直接从mybatis-plus项目上 clone下来的
使用eclipse开发

maven基本依赖

<groupId>org.jeecg</groupId>

<artifactId>easypoi-base</artifactId>

</dependency>

<groupId>org.jeecg</groupId>

<artifactId>easypoi-web</artifactId>

</dependency>

<groupId>org.jeecg</groupId>

<artifactId>easypoi-annotation</artifactId>

</dependency>

springmvc的配置
默认视图级别设置低点

<beanid="defaultViewResolver"

class="org.springframework.web.servlet.view.InternalResourceViewResolver"

p:order="3">

<propertyname="viewClass"

value="org.springframework.web.servlet.view.JstlView" />

<propertyname="contentType"value="text/html" />

<propertyname="prefix"value="/webpage/" />

<propertyname="suffix"value=".jsp" />

</bean>

Bean视图设置级别高一些,然后把我们的4个试图配置上,就完成了

<beanid="beanNameViewResolver"

class="org.springframework.web.servlet.view.BeanNameViewResolver"p:order="0">

</bean>

<beanid="jeecgExcelView"class="org.jeecgframework.poi.excel.view.JeecgSingleExcelView" />

<beanid="jeecgTemplateExcelView"class="org.jeecgframework.poi.excel.view.JeecgTemplateExcelView" />

<beanid="jeecgTemplateWordView"class="org.jeecgframework.poi.excel.view.JeecgTemplateWordView" />

<beanid="jeecgMapExcelView"class="org.jeecgframework.poi.excel.view.JeecgMapExcelView" />

2.0.8版本后加上了@Controller 里面只要在

<context:component-scanbase-package="org.jeecgframework.poi.excel.view">

加入就可以了

完成了这些配置以后就可以开始开发了

导出

1. Map方式导出

ExcelExportEntity的构造函数是ExcelExportEntity(String name, Objectkey, int width)
指定了column名和property名，用于生成表头，但是不知道这个width有什么作用。
然后设置了文件名，title，second title，sheet名等

@RequestMapping("/MapExportExcel")

public String exportMerchantProfitQuery(ModelMap modelMap, HttpServletRequest request) {

List<ExcelExportEntity>entityList = new ArrayList<ExcelExportEntity>();

entityList.add(new ExcelExportEntity("用户ID", "id", 35));

entityList.add(new ExcelExportEntity("用户名", "name", 15));

entityList.add(new ExcelExportEntity("用户年龄", "age", 15));

List<Map<String, String>>dataResult = getData();

modelMap.put(MapExcelConstants.ENTITY_LIST, entityList);

modelMap.put(MapExcelConstants.MAP_LIST, dataResult);

modelMap.put(MapExcelConstants.FILE_NAME, "商户利润");

Date now = new Date();

modelMap.put(NormalExcelConstants.PARAMS,new ExportParams("商户利润详情", "创建时间" + now.toLocaleString(), "商户"));

returnMapExcelConstants.JEECG_MAP_EXCEL_VIEW;

}

private List<Map<String, String>> getData() {

List<Map<String, String>>dataResult = new ArrayList<Map<String, String>>();

Map<String, String> u1 = new LinkedHashMap<String,String>();

u1.put("id", "1");

u1.put("name", "cyf");

u1.put("age", "21");

Map<String, String> u2 = new LinkedHashMap<String,String>();

u2.put("id", "2");

u2.put("name", "cy");

u2.put("age", "22");

dataResult.add(u1);

dataResult.add(u2);

return dataResult;

}

2.注解导出

注解导出需要在实体类上先加上注解
这里先简要介绍

两个实体类

package com.baomidou.springmvc.model.system;

import java.io.Serializable;

import java.util.Date;

import org.jeecgframework.poi.excel.annotation.Excel;

publicclassProductimplementsSerializable{

/**

privatestaticfinallong serialVersionUID = 1L;

privateint id;

@Excel(name = "商品名", needMerge = true)

private String name;

@Excel(name = "价格", needMerge = true)

privatedouble price;

@Excel(name = "购买时间", exportFormat="yyyy/mm/dd", needMerge = true)

private Date time;

publicintgetId() {

return id;

}

publicvoidsetId(int id) {

this.id = id;

}

public String getName() {

return name;

}

publicvoidsetName(String name) {

this.name = name;

}

publicdoublegetPrice() {

return price;

}

publicvoidsetPrice(double price) {

this.price = price;

}

public Date getTime() {

return time;

}

publicvoidsetTime(Date time) {

this.time = time;

}

package com.baomidou.springmvc.model.system;

import java.io.Serializable;

import java.util.Date;

import java.util.List;

import org.jeecgframework.poi.excel.annotation.Excel;

import org.jeecgframework.poi.excel.annotation.ExcelCollection;

import org.jeecgframework.poi.excel.annotation.ExcelEntity;

import org.jeecgframework.poi.excel.annotation.ExcelTarget;

import com.baomidou.mybatisplus.annotations.TableName;

/**

* 系统用户表

@ExcelTarget("User")

@TableName("sys_user")

publicclassUserimplementsSerializable {

privatestaticfinallong serialVersionUID = 1L;

/** 用户ID */

@Excel(name = "用户id" , needMerge = true)

private Long id;

/** 用户名 */

@Excel(name = "用户名", needMerge = true)

private String name;

/** 用户年龄 */

@Excel(name = "年龄", needMerge = true)

private Integer age;

@ExcelEntity(name = "商品")

private Product product;

/**购买的商品*/

@ExcelCollection(name = "商品序列")

private List<Product> products;

/**创建时间*/

@Excel(name = "创建时间" ,exportFormat="yyyy-mm-dd" , needMerge = true )

private Date time;

/**性别*/

@Excel(name="性别" , replace={"男_1","女_0"}, needMerge = true)

privateint sex;

public List<Product> getProducts() {

return products;

}

publicvoidsetProducts(List<Product> products) {

this.products = products;

}

public Product getProduct() {

return product;

}

publicvoidsetProduct(Product product) {

this.product = product;

}

publicintgetSex() {

return sex;

}

publicvoidsetSex(int sex) {

this.sex = sex;

}

public Date getTime() {

return time;

}

publicvoidsetTime(Date time) {

this.time = time;

}

public Long getId() {

returnthis.id;

}

publicvoidsetId(Long id) {

this.id = id;

}

public String getName() {

returnthis.name;

}

publicvoidsetName(String name) {

this.name = name;

}

public Integer getAge() {

returnthis.age;

}

publicvoidsetAge(Integer age) {

this.age = age;

}

controller 这里需要注意的一点是
setExclusions 写的是实际列名，而不是属性名

@RequestMapping("/excelAnno")

public String excelAnno(ModelMap map1) {

List<User> list = getUsers();

map1.put(NormalExcelConstants.CLASS,User.class);

map1.put(NormalExcelConstants.FILE_NAME,"用户导出测试");

ExportParams ep = new ExportParams("历史总包滚存分析1", "历史总包滚存分析2");

ep.setExclusions(new String[] { "年龄" });// 这里填替换后的

map1.put(NormalExcelConstants.PARAMS,ep);

map1.put(NormalExcelConstants.DATA_LIST, list);

returnNormalExcelConstants.JEECG_EXCEL_VIEW;

}

private List<User> getUsers() {

Product p1 = new Product();

Product p2 = new Product();

p1.setId(1);

p1.setName("apple");

p1.setPrice(10);

p1.setTime(new Date());

p2.setId(2);

p2.setName("pear");

p2.setPrice(30);

p2.setTime(new Date());

User u1 = new User();

u1.setAge(21);

u1.setId(Long.parseLong("1"));

u1.setName("cyf");

u1.setProduct(p1);

u1.setSex(1);

List<Product> products = new ArrayList<Product>();

products.add(p2);

products.add(p1);

u1.setProducts(products);

u1.setTime(new Date());

User u2 = new User();

u2.setAge(23);

u2.setId(Long.parseLong("2"));

u2.setName("cy");

u2.setProduct(p2);

u2.setSex(1);

u2.setProducts(products);

u2.setTime(new Date());

List<User> users = new ArrayList<User>();

users.add(u1);

users.add(u2);

return users;

}

3.多sheet导出

@RequestMapping("/multiplyexcelAnno")

publicvoidmultiplyexcelAnno(HttpServletRequest req, HttpServletResponse resp) throws UnsupportedEncodingException {

Map<String, Object> map1 =getTestMap();

Map<String, Object> map2 =getTestMap();

List<Map<String,Object>>list1 = new ArrayList<Map<String,Object>>();

list1.add(map1);

list1.add(map2);

Workbook workbook = exportExcel(list1,ExcelType.HSSF);

req.setCharacterEncoding("UTF-8");

resp.setCharacterEncoding("UTF-8");

resp.setContentType("application/x-download");

String filedisplay = "product.xls";

filedisplay = URLEncoder.encode(filedisplay,"UTF-8");

resp.addHeader("Content-Disposition", "attachment;filename=" + filedisplay);

try {

OutputStream out =resp.getOutputStream();

workbook.write(out);

out.close();

} catch (Exception e) {

e.printStackTrace();

}

private Map<String, Object> getTestMap() {

Map<String,Object> map1 = new LinkedHashMap<String,Object>();

List<User> list = getUsers();

map1.put(NormalExcelConstants.CLASS, User.class);

map1.put(NormalExcelConstants.FILE_NAME, "用户导出测试");

ExportParams ep = new ExportParams("历史总包滚存分析1", "111"+(1000*Math.random()));

ep.setExclusions(new String[] { "年龄" });// 这里填替换后的

map1.put(NormalExcelConstants.PARAMS,ep);

map1.put(NormalExcelConstants.DATA_LIST, list);

return map1;

}

publicstatic Workbook exportExcel(List<Map<String, Object>> list, ExcelType type) {

Workbook workbook;

if (ExcelType.HSSF.equals(type)) {

workbook = new HSSFWorkbook();

} else {

workbook = new XSSFWorkbook();

}

for (Map<String, Object> map :list) {

ExcelExportServer server = new ExcelExportServer();

ExportParams params = (ExportParams)map.get("params");

Class<?> entry =(Class<?>) map.get("entity");

Collection<?> data =(Collection<?>) map.get("data");

server.createSheet(workbook,params,entry ,data);

}

return workbook;

}

导出结果

导入

导入的时候也是利用了注解，基本上就是导出的反操作
需要说明的是目前官方的导入集合还没修复，好在我在pull request里找到了解决的方法，封装了拿来用，果然可以

@RequestMapping(value = "/import", method = RequestMethod.POST)

@ResponseBody

publicvoidimportExcel(MultipartFile file,HttpServletRequest request) {

try {

ImportParams params = new ImportParams();

params.setTitleRows(1);

params.setHeadRows(2);

params.setNeedSave(true);

String path =request.getSession().getServletContext().getRealPath("");

File f = new File(path+"/excel/"+file.getOriginalFilename());

if(!f.exists()){

try {

File dir = new File(path+"/excel/");

dir.mkdirs();

if(f.createNewFile()){

System.out.println("创建文件成功");

}else{

System.out.println("创建文件失败");

}

} catch (IOException e) {

e.printStackTrace();

}

file.transferTo(f);

List<User> list =WrapperUtil.warpedImportExcel( f, User.class, params);

System.out.println(JSON.toJSONString(list));

} catch (Exception e) {

e.printStackTrace();

}

前端页面

<%@ pagecontentType="text/html;charset=UTF-8" language="java" %>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<c:setvar="ctx"value="${pageContext.request.contextPath}"/>

<html>

<head>

</head>

<body>

<inputtype="button"value="Map导出"onclick="download1()"/>

<inputtype="button"value="anno导出"onclick="download2()"/>

<inputtype="button"value="mulanno导出"onclick="download3()"/>

<formaction="import"method="POST"enctype="multipart/form-data">

<inputtype="file"name="file"/>

<inputtype="submit"value="上传" />

</form>

</body>

<scripttype="text/javascript">

functiondownload1(){

window.open('/mybatisplus-spring-mvc/MapExportExcel');

}

functiondownload2(){

window.open('/mybatisplus-spring-mvc/excelAnno');

}

functiondownload3(){

window.open('/mybatisplus-spring-mvc/multiplyexcelAnno');

}

</script>

</html>

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