史上最全的Excel导入导出(easyexcel版)
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文章目录
- 环境搭建
- 读取excel文件
- 默认读取
- 指定读取
- 默认读取
- 指定读取
- 小于1000行数据
- 大于1000行数据
- 导出excle
- 无模型映射导出
- 模型映射导出
- 单个Sheet导出
- 多个Sheet导出
- 工具类
- 测试类
**注 意** **文末有:7701页互联网大厂面试题**
环境搭建
- easyexcel 依赖(必须)
- springboot (不是必须)
- lombok (不是必须)
com.alibaba
easyexcel
1.1.2-beat1
org.projectlombok
lombok
1.18.2
读取excel文件 小于1000行数据
默认读取 读取Sheet1的全部数据
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx";
List
指定读取 下面是学生表.xlsx中Sheet1,Sheet2的数据
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获取Sheet1表头以下的信息
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx";
//第一个1代表sheet1, 第二个1代表从第几行开始读取数据,行号最小值为0
Sheet sheet = new Sheet(1, 1);
List
获取Sheet2的所有信息
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx";
Sheet sheet = new Sheet(2, 0);
List
大于1000行数据
默认读取
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx";
List
指定读取
String filePath = "/home/chenmingjian/Downloads/学生表.xlsx";
Sheet sheet = new Sheet(1, 2);
List
导出excle 单个Sheet导出
无模型映射导出
String filePath = "/home/chenmingjian/Downloads/测试.xlsx";
List> data = https://www.it610.com/article/new ArrayList<>();
data.add(Arrays.asList("111","222","333"));
data.add(Arrays.asList("111","222","333"));
data.add(Arrays.asList("111","222","333"));
List head = Arrays.asList("表头1", "表头2", "表头3");
ExcelUtil.writeBySimple(filePath,data,head);
结果
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模型映射导出 1、定义好模型对象
package com.springboot.utils.excel.test;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;
import lombok.Data;
import lombok.EqualsAndHashCode;
/**
* @description:
* @author: chenmingjian
* @date: 19-4-3 14:44
*/
@EqualsAndHashCode(callSuper = true)
@Data
public class TableHeaderExcelProperty extends BaseRowModel {/**
* value: 表头名称
* index: 列的号, 0表示第一列
*/
@ExcelProperty(value = "https://www.it610.com/article/姓名", index = 0)
private String name;
@ExcelProperty(value = "https://www.it610.com/article/年龄",index = 1)
private int age;
@ExcelProperty(value = "https://www.it610.com/article/学校",index = 2)
private String school;
}
2、调用方法
String filePath = "/home/chenmingjian/Downloads/测试.xlsx";
ArrayList data = https://www.it610.com/article/new ArrayList<>();
for(int i = 0;
i < 4;
i++){
TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty();
tableHeaderExcelProperty.setName("cmj" + i);
tableHeaderExcelProperty.setAge(22 + i);
tableHeaderExcelProperty.setSchool("清华大学" + i);
data.add(tableHeaderExcelProperty);
}ExcelUtil.writeWithTemplate(filePath,data);
多个Sheet导出
1、定义好模型对象
package com.springboot.utils.excel.test;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;
import lombok.Data;
import lombok.EqualsAndHashCode;
/**
* @description:
* @author: chenmingjian
* @date: 19-4-3 14:44
*/
@EqualsAndHashCode(callSuper = true)
@Data
public class TableHeaderExcelProperty extends BaseRowModel {/**
* value: 表头名称
* index: 列的号, 0表示第一列
*/
@ExcelProperty(value = "https://www.it610.com/article/姓名", index = 0)
private String name;
@ExcelProperty(value = "https://www.it610.com/article/年龄",index = 1)
private int age;
@ExcelProperty(value = "https://www.it610.com/article/学校",index = 2)
private String school;
}
【史上最全的Excel导入导出(easyexcel版)】2、调用方法
ArrayList list1 = new ArrayList<>();
for(int j = 1;
j < 4;
j++){
ArrayList list = new ArrayList<>();
for(int i = 0;
i < 4;
i++){
TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty();
tableHeaderExcelProperty.setName("cmj" + i);
tableHeaderExcelProperty.setAge(22 + i);
tableHeaderExcelProperty.setSchool("清华大学" + i);
list.add(tableHeaderExcelProperty);
}Sheet sheet = new Sheet(j, 0);
sheet.setSheetName("sheet" + j);
ExcelUtil.MultipleSheelPropety multipleSheelPropety = new ExcelUtil.MultipleSheelPropety();
multipleSheelPropety.setData(list);
multipleSheelPropety.setSheet(sheet);
list1.add(multipleSheelPropety);
}ExcelUtil.writeWithMultipleSheel("/home/chenmingjian/Downloads/aaa.xlsx",list1);
工具类
package com.springboot.utils.excel;
import com.alibaba.excel.EasyExcelFactory;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import lombok.Data;
import lombok.Getter;
import lombok.Setter;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
import java.io.*;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* @description:
* @author: chenmingjian
* @date: 19-3-18 16:16
*/
@Slf4j
public class ExcelUtil {private static Sheet initSheet;
static {
initSheet = new Sheet(1, 0);
initSheet.setSheetName("sheet");
//设置自适应宽度
initSheet.setAutoWidth(Boolean.TRUE);
}/**
* 读取少于1000行数据
* @param filePath 文件绝对路径
* @return
*/
public static List
测试类
package com.springboot.utils.excel;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import lombok.Data;
import lombok.EqualsAndHashCode;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* @description: 测试类
* @author: chenmingjian
* @date: 19-4-4 15:24
*/
@SpringBootTest
@RunWith(SpringRunner.class)
public class Test {/**
* 读取少于1000行的excle
*/
@org.junit.Test
public void readLessThan1000Row(){
String filePath = "/home/chenmingjian/Downloads/测试.xlsx";
List objects = ExcelUtil.readLessThan1000Row(filePath);
objects.forEach(System.out::println);
}/**
* 读取少于1000行的excle,可以指定sheet和从几行读起
*/
@org.junit.Test
public void readLessThan1000RowBySheet(){
String filePath = "/home/chenmingjian/Downloads/测试.xlsx";
Sheet sheet = new Sheet(1, 1);
List objects = ExcelUtil.readLessThan1000RowBySheet(filePath,sheet);
objects.forEach(System.out::println);
}/**
* 读取大于1000行的excle
* 带sheet参数的方法可参照测试方法readLessThan1000RowBySheet()
*/
@org.junit.Test
public void readMoreThan1000Row(){
String filePath = "/home/chenmingjian/Downloads/测试.xlsx";
List objects = ExcelUtil.readMoreThan1000Row(filePath);
objects.forEach(System.out::println);
}/**
* 生成excle
* 带sheet参数的方法可参照测试方法readLessThan1000RowBySheet()
*/
@org.junit.Test
public void writeBySimple(){
String filePath = "/home/chenmingjian/Downloads/测试.xlsx";
List> data = https://www.it610.com/article/new ArrayList<>();
data.add(Arrays.asList("111","222","333"));
data.add(Arrays.asList("111","222","333"));
data.add(Arrays.asList("111","222","333"));
List head = Arrays.asList("表头1", "表头2", "表头3");
ExcelUtil.writeBySimple(filePath,data,head);
}/**
* 生成excle, 带用模型
* 带sheet参数的方法可参照测试方法readLessThan1000RowBySheet()
*/
@org.junit.Test
public void writeWithTemplate(){
String filePath = "/home/chenmingjian/Downloads/测试.xlsx";
ArrayList data = https://www.it610.com/article/new ArrayList<>();
for(int i = 0;
i < 4;
i++){
TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty();
tableHeaderExcelProperty.setName("cmj" + i);
tableHeaderExcelProperty.setAge(22 + i);
tableHeaderExcelProperty.setSchool("清华大学" + i);
data.add(tableHeaderExcelProperty);
}
ExcelUtil.writeWithTemplate(filePath,data);
}/**
* 生成excle, 带用模型,带多个sheet
*/
@org.junit.Test
public void writeWithMultipleSheel(){
ArrayList list1 = new ArrayList<>();
for(int j = 1;
j < 4;
j++){
ArrayList list = new ArrayList<>();
for(int i = 0;
i < 4;
i++){
TableHeaderExcelProperty tableHeaderExcelProperty = new TableHeaderExcelProperty();
tableHeaderExcelProperty.setName("cmj" + i);
tableHeaderExcelProperty.setAge(22 + i);
tableHeaderExcelProperty.setSchool("清华大学" + i);
list.add(tableHeaderExcelProperty);
}Sheet sheet = new Sheet(j, 0);
sheet.setSheetName("sheet" + j);
ExcelUtil.MultipleSheelPropety multipleSheelPropety = new ExcelUtil.MultipleSheelPropety();
multipleSheelPropety.setData(list);
multipleSheelPropety.setSheet(sheet);
list1.add(multipleSheelPropety);
}ExcelUtil.writeWithMultipleSheel("/home/chenmingjian/Downloads/aaa.xlsx",list1);
}/*******************匿名内部类,实际开发中该对象要提取出去**********************//**
* @description:
* @author: chenmingjian
* @date: 19-4-3 14:44
*/
@EqualsAndHashCode(callSuper = true)
@Data
public static class TableHeaderExcelProperty extends BaseRowModel {/**
* value: 表头名称
* index: 列的号, 0表示第一列
*/
@ExcelProperty(value = "https://www.it610.com/article/姓名", index = 0)
private String name;
@ExcelProperty(value = "https://www.it610.com/article/年龄",index = 1)
private int age;
@ExcelProperty(value = "https://www.it610.com/article/学校",index = 2)
private String school;
}/*******************匿名内部类,实际开发中该对象要提取出去**********************/}
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