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EasyExcel（环境搭建以及常用写入操作）

article 2025/1/5 15:02:35

文章目录

  • EasyExcel环境搭建
    • 1.创建模块 easyexcel-demo
    • 2.引入依赖
    • 3.启动类创建
  • EasyExcel写
    • 1.最简单的写入
        • 1.模板
        • 2.方法
        • 3.结果 Write01.xlsx
    • 2.指定字段不写入Excel
        • 1.模板
        • 2.方法
        • 3.结果 Write02.xlsx
    • 3.指定字段写入excel
        • 1.模板
        • 2.方法
        • 3.结果 Write03.xlsx
    • 4.按照index顺序写入excel
        • 1.模板
        • 2.方法
        • 3.结果 Write04.xlsx
    • 5.复杂头数据写入，合并单元格
        • 1.模板
        • 2.方法
        • 3.结果 Write05.xlsx
    • 6.写入数据到不同的sheet中
        • 1.模板
        • 2.方法
        • 3.结果 Write06.xlsx
    • 7.日期数字格式化
        • 1.模板
        • 2.方法
        • 3.结果 Write07.xlsx
    • 8.写入图片到Excel
        • 1.模板
        • 2.方法
        • 3.结果 Write08.xlsx
    • 9.通过注解形式设置写入Excel样式
        • 1.模板
        • 2.方法
        • 3.结果 Write09.xlsx
    • 10.应用自定义转换器
        • 1.模板
        • 2.自定义转换器
        • 3.方法
        • 4.结果 Write10.xlsx

EasyExcel环境搭建

1.创建模块 easyexcel-demo

CleanShot 2024-10-30 at 14.43.41@2x

2.引入依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.2</version>
    </parent>

    <groupId>com.sunxiansheng</groupId>
    <artifactId>easyexcel-demo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
            <version>3.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
</project>

3.启动类创建

package com.sunxiansheng;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * Description: 启动类
 *
 * @Author sun
 * @Create 2024/10/29 11:19
 * @Version 1.0
 */
@SpringBootApplication
public class ExcelApplication {

    public static void main(String[] args) {
        SpringApplication.run(ExcelApplication.class, args);
    }
}

EasyExcel写

1.最简单的写入

1.模板
    @NoArgsConstructor
    @AllArgsConstructor
    @Data
    @Builder
    public static class Write01 {
        @ExcelProperty(value = "用户编号")
        private Integer userId;
        @ExcelProperty(value = "姓名")
        private String userName;
        @ExcelProperty(value = "性别")
        private String gender;
        @ExcelProperty(value = "工资")
        private Double salary;
        @ExcelProperty(value = "入职时间")
        private Date hireDate;
    }
2.方法
    /**
     * 最简单的写入
     */
    @Test
    public void testWrite01() {
        String fileName = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/Write01.xlsx";
        // 1.构建write，指定写入的文件路径
        ExcelWriter excelWriter = EasyExcel.write(fileName)
                .build();
        // 2.构建sheet，指定sheetName和模板
        WriteSheet writeSheet = EasyExcel.writerSheet()
                .sheetName("用户信息")
                .head(Write01.class)
                .build();
        // 3.构造数据
        List<Write01> list = new ArrayList<>();
        for (int i = 1; i <= 10; i++) {
            Write01 user = Write01.builder()
                    .userId(i)
                    .userName("admin" + i)
                    .gender(i % 2 == 0 ? "女" : "男")
                    .salary(i * 1000.00)
                    .hireDate(new Date())
                    .build();
            list.add(user);
        }
        // 4.write向sheet中写入数据
        excelWriter.write(list, writeSheet);
        // 5.关闭流
        excelWriter.finish();
    }
3.结果 Write01.xlsx

CleanShot 2024-10-30 at 14.58.58@2x

2.指定字段不写入Excel

1.模板
    @NoArgsConstructor
    @AllArgsConstructor
    @Data
    @Builder
    public static class Write02 {
        @ExcelProperty(value = "用户编号")
        private Integer userId;
        @ExcelProperty(value = "姓名")
        private String userName;
        @ExcelProperty(value = "性别")
        private String gender;
        @ExcelProperty(value = "工资")
        private Double salary;
        @ExcelProperty(value = "入职时间")
        private Date hireDate;
    }
2.方法

CleanShot 2024-10-30 at 15.03.32@2x

    /**
     * 指定字段不写入excel
     */
    @Test
    public void testWrite02() {
        String fileName = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/Write02.xlsx";
        // 1.构建write，指定写入的文件路径
        ExcelWriter excelWriter = EasyExcel.write(fileName)
                .build();
        // 2.构建sheet，指定sheetName和模板
        WriteSheet writeSheet = EasyExcel.writerSheet()
                .sheetName("用户信息")
                .head(Write02.class)
                .excludeColumnFieldNames(Arrays.asList("salary", "hireDate")) // 排除字段
                .build();
        // 3.构造数据
        List<Write02> list = new ArrayList<>();
        for (int i = 1; i <= 10; i++) {
            Write02 user = Write02.builder()
                    .userId(i)
                    .userName("admin" + i)
                    .gender(i % 2 == 0 ? "女" : "男")
                    .salary(i * 1000.00)
                    .hireDate(new Date())
                    .build();
            list.add(user);
        }
        // 4.write向sheet中写入数据
        excelWriter.write(list, writeSheet);
        // 5.关闭流
        excelWriter.finish();
    }
3.结果 Write02.xlsx

CleanShot 2024-10-30 at 15.04.08@2x

3.指定字段写入excel

1.模板
    @NoArgsConstructor
    @AllArgsConstructor
    @Data
    @Builder
    public static class Write03 {
        @ExcelProperty(value = "用户编号")
        private Integer userId;
        @ExcelProperty(value = "姓名")
        private String userName;
        @ExcelProperty(value = "性别")
        private String gender;
        @ExcelProperty(value = "工资")
        private Double salary;
        @ExcelProperty(value = "入职时间")
        private Date hireDate;
    }
2.方法
/**
 * 指定字段写入excel
 */
@Test
public void testWrite03() {
    String fileName = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/Write03.xlsx";
    // 1.构建write，指定写入的文件路径
    ExcelWriter excelWriter = EasyExcel.write(fileName)
            .build();
    // 2.构建sheet，指定sheetName和模板
    WriteSheet writeSheet = EasyExcel.writerSheet()
            .sheetName("用户信息")
            .head(Write03.class)
            .includeColumnFieldNames(Arrays.asList("salary", "hireDate")) // 包含字段
            .build();
    // 3.构造数据
    List<Write03> list = new ArrayList<>();
    for (int i = 1; i <= 10; i++) {
        Write03 user = Write03.builder()
                .userId(i)
                .userName("admin" + i)
                .gender(i % 2 == 0 ? "女" : "男")
                .salary(i * 1000.00)
                .hireDate(new Date())
                .build();
        list.add(user);
    }
    // 4.write向sheet中写入数据
    excelWriter.write(list, writeSheet);
    // 5.关闭流
    excelWriter.finish();
}
3.结果 Write03.xlsx

CleanShot 2024-10-30 at 15.14.07@2x

4.按照index顺序写入excel

1.模板
    @NoArgsConstructor
    @AllArgsConstructor
    @Data
    @Builder
    public static class Write04 {
        @ExcelProperty(value = "用户编号", index = 0)
        private Integer userId;
        @ExcelProperty(value = "姓名", index = 1)
        private String userName;
        @ExcelProperty(value = "性别", index = 3)
        private String gender;
        @ExcelProperty(value = "工资", index = 4)
        private Double salary;
        @ExcelProperty(value = "入职时间", index = 2)
        private Date hireDate;
    }
2.方法
/**
 * 按照index顺序写入excel
 */
@Test
public void testWrite04() {
    String fileName = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/Write04.xlsx";
    // 1.构建write，指定写入的文件路径
    ExcelWriter excelWriter = EasyExcel.write(fileName)
            .build();
    // 2.构建sheet，指定sheetName和模板
    WriteSheet writeSheet = EasyExcel.writerSheet()
            .sheetName("用户信息")
            .head(Write04.class)
            .build();
    // 3.构造数据
    List<Write04> list = new ArrayList<>();
    for (int i = 1; i <= 10; i++) {
        Write04 user = Write04.builder()
                .userId(i)
                .userName("admin" + i)
                .gender(i % 2 == 0 ? "女" : "男")
                .salary(i * 1000.00)
                .hireDate(new Date())
                .build();
        list.add(user);
    }
    // 4.write向sheet中写入数据
    excelWriter.write(list, writeSheet);
    // 5.关闭流
    excelWriter.finish();
}
3.结果 Write04.xlsx

CleanShot 2024-10-30 at 15.17.05@2x

5.复杂头数据写入，合并单元格

1.模板
    @NoArgsConstructor
    @AllArgsConstructor
    @Data
    @Builder
    public static class Write05 {
        @ExcelProperty(value = {"group1", "用户编号"})
        private Integer userId;
        @ExcelProperty(value = {"group1", "姓名"})
        private String userName;
        @ExcelProperty(value = {"group2", "性别"})
        private String gender;
        @ExcelProperty(value = {"group2", "工资"})
        private Double salary;
        @ExcelProperty(value = "入职时间")
        private Date hireDate;
    }
2.方法
/**
 * 复杂头数据写入，合并单元格
 */
@Test
public void testWrite05() {
    String fileName = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/Write05.xlsx";
    // 1.构建write，指定写入的文件路径
    ExcelWriter excelWriter = EasyExcel.write(fileName)
            .build();
    // 2.构建sheet，指定sheetName和模板
    WriteSheet writeSheet = EasyExcel.writerSheet()
            .sheetName("用户信息")
            .head(Write05.class)
            .build();
    // 3.构造数据
    List<Write05> list = new ArrayList<>();
    for (int i = 1; i <= 10; i++) {
        Write05 user = Write05.builder()
                .userId(i)
                .userName("admin" + i)
                .gender(i % 2 == 0 ? "女" : "男")
                .salary(i * 1000.00)
                .hireDate(new Date())
                .build();
        list.add(user);
    }
    // 4.write向sheet中写入数据
    excelWriter.write(list, writeSheet);
    // 5.关闭流
    excelWriter.finish();
}
3.结果 Write05.xlsx

CleanShot 2024-10-30 at 15.22.53@2x

6.写入数据到不同的sheet中

1.模板
@NoArgsConstructor
@AllArgsConstructor
@Data
@Builder
public static class Write06 {
    @ExcelProperty(value = "用户编号")
    private Integer userId;
    @ExcelProperty(value = "姓名")
    private String userName;
    @ExcelProperty(value = "性别")
    private String gender;
    @ExcelProperty(value = "工资")
    private Double salary;
    @ExcelProperty(value = "入职时间")
    private Date hireDate;
}
2.方法
/**
 * 写入数据到不同的sheet中
 */
@Test
public void testWrite06() {
    String fileName = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/Write06.xlsx";
    // 1.构建write，指定写入的文件路径
    ExcelWriter excelWriter = EasyExcel.write(fileName)
            .build();
    // 2.循环创建十个sheet，并分别写入数据
    for (int j = 0; j < 10; j++) {
        // 创建sheet
        WriteSheet writeSheet = EasyExcel.writerSheet()
                .sheetName("用户信息" + j)
                .head(Write06.class)
                .build();
        // 3.构造数据
        List<Write06> list = new ArrayList<>();
        for (int i = 1; i <= 10; i++) {
            Write06 user = Write06.builder()
                    .userId(i)
                    .userName("admin" + i)
                    .gender(i % 2 == 0 ? "女" : "男")
                    .salary(i * 1000.00)
                    .hireDate(new Date())
                    .build();
            list.add(user);
        }
        // 4.write向sheet中写入数据
        excelWriter.write(list, writeSheet);
    }
    // 5.关闭流
    excelWriter.finish();
}
3.结果 Write06.xlsx

CleanShot 2024-10-30 at 15.30.52@2x

7.日期数字格式化

1.模板
@NoArgsConstructor
@AllArgsConstructor
@Data
@Builder
public static class Write07 {
    @ExcelProperty(value = "用户编号")
    private Integer userId;
    @ExcelProperty(value = "姓名")
    private String userName;
    @ExcelProperty(value = "性别")
    private String gender;
    @ExcelProperty(value = "工资")
    @ContentStyle(dataFormat = 2) // 保留两位小数
    private Double salary;
    @ExcelProperty(value = "入职时间")
    @DateTimeFormat(value = "yyyy年MM月dd日 HH时mm分ss秒") // 日期格式化
    private Date hireDate;
}
2.方法
/**
 * 日期数字格式化
 */
@Test
public void testWrite07() {
    String fileName = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/Write07.xlsx";
    // 1.构建write，指定写入的文件路径
    ExcelWriter excelWriter = EasyExcel.write(fileName)
            .build();
    // 2.构建sheet，指定sheetName和模板
    WriteSheet writeSheet = EasyExcel.writerSheet()
            .sheetName("用户信息")
            .head(Write07.class)
            .build();
    // 3.构造数据
    List<Write07> list = new ArrayList<>();
    for (int i = 1; i <= 10; i++) {
        Write07 user = Write07.builder()
                .userId(i)
                .userName("admin" + i)
                .gender(i % 2 == 0 ? "女" : "男")
                .salary(i * 1000.213214234)
                .hireDate(new Date())
                .build();
        list.add(user);
    }
    // 4.write向sheet中写入数据
    excelWriter.write(list, writeSheet);
    // 5.关闭流
    excelWriter.finish();
}
3.结果 Write07.xlsx

CleanShot 2024-10-30 at 15.42.52@2x

8.写入图片到Excel

1.模板
@NoArgsConstructor
@AllArgsConstructor
@Data
@Builder
@ContentRowHeight(value = 100) // 内容行高
@ColumnWidth(value = 20) // 列宽
static class Write08 {
    // 使用抽象文件表示一个图片
    @ExcelProperty(value = "File类型")
    private File file;
    // 使用输入流保存一个图片
    @ExcelProperty(value = "InputStream类型")
    private InputStream inputStream;
    // 当使用String类型保存一个图片的时候需要使用StringImageConverter转换器
    @ExcelProperty(value = "String类型", converter = StringImageConverter.class)
    private String str;
    // 使用二进制数据保存为一个图片
    @ExcelProperty(value = "二进制数据(字节)")
    private byte[] byteArr;
    // 使用网络链接保存为一个图片
    @ExcelProperty(value = "网络图片")
    private URL url;
}
2.方法
    /**
     * 写入图片到Excel
     */
    @Test
    public void testWrite08() throws Exception {
        String fileName = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/Write08.xlsx";
        // 本地图片
        String imagePath = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/th.jpeg";
        // 网络图片
        URL url = new URL("https://cn.bing.com/th?id=OHR.TanzaniaBeeEater_ZH-CN3246625733_1920x1080.jpg&rf=LaDigue_1920x1080.jpg&pid=hp");
        // 构建writer
        ExcelWriter excelWriter = EasyExcel.write(fileName)
                .build();
        // 构建sheet
        WriteSheet writeSheet = EasyExcel.writerSheet()
                .head(Write08.class)
                .sheetName("图片信息")
                .build();
        // 构建data
        // 将图片读取到byte数组中
        byte[] bytes = new byte[(int) new File(imagePath).length()];
        InputStream inputStream = new FileInputStream(imagePath);
        inputStream.read(bytes, 0, bytes.length);

        List<Write08> imageDataList = new ArrayList<>();

        // 创建数据模板
        Write08 imageData = Write08.builder()
                .file(new File(imagePath)) // File类型
                .inputStream(new FileInputStream(imagePath)) // InputStream类型
                .str(imagePath) // String类型
                .byteArr(bytes) // 二进制数据
                .url(url) // 网络图片
                .build();
        // 添加要写入的图片模型
        imageDataList.add(imageData);
        // 写入数据
        excelWriter.write(imageDataList, writeSheet);
        // 关闭流
        excelWriter.finish();
    }
3.结果 Write08.xlsx

CleanShot 2024-10-30 at 15.51.33@2x

9.通过注解形式设置写入Excel样式

1.模板
    @NoArgsConstructor
    @AllArgsConstructor
    @Data
    @Builder
    @HeadRowHeight(value = 30) // 头部行高
    @ContentRowHeight(value = 25) // 内容行高
    @ColumnWidth(value = 20) // 列宽
    // 头字体设置成20, 字体默认宋体
    @HeadFontStyle(fontName = "宋体", fontHeightInPoints = 20)
    // 内容字体设置成20, 字体默认宋体
    @ContentFontStyle(fontName = "宋体", fontHeightInPoints = 20)
    public static class Write09 {
        @ExcelProperty(value = "用户编号")
        private Integer userId;
        // 字符串的头字体设置成20
        @HeadFontStyle(fontHeightInPoints = 30)
        // 字符串的内容字体设置成20,默认宋体
        @ContentFontStyle(fontName = "宋体", fontHeightInPoints = 20)
        @ExcelProperty(value = "姓名")
        private String userName;
        @ExcelProperty(value = "性别")
        private String gender;
        @ExcelProperty(value = "工资")
        private Double salary;
        @ExcelProperty(value = "入职时间")
        private Date hireDate;
    }
2.方法
/**
 * 通过注解形式设置写入Excel样式
 */
@Test
public void testWrite09() {
    String fileName = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/Write09.xlsx";
    // 1.构建write，指定写入的文件路径
    ExcelWriter excelWriter = EasyExcel.write(fileName)
            .build();
    // 2.构建sheet，指定sheetName和模板
    WriteSheet writeSheet = EasyExcel.writerSheet()
            .sheetName("用户信息")
            .head(Write09.class)
            .build();
    // 3.构造数据
    List<Write09> list = new ArrayList<>();
    for (int i = 1; i <= 10; i++) {
        Write09 user = Write09.builder()
                .userId(i)
                .userName("admin" + i)
                .gender(i % 2 == 0 ? "女" : "男")
                .salary(i * 1000.00)
                .hireDate(new Date())
                .build();
        list.add(user);
    }
    // 4.write向sheet中写入数据
    excelWriter.write(list, writeSheet);
    // 5.关闭流
    excelWriter.finish();
}
3.结果 Write09.xlsx

CleanShot 2024-10-30 at 15.57.32@2x

10.应用自定义转换器

1.模板
@NoArgsConstructor
@AllArgsConstructor
@Data
@Builder
public static class Write10 {
    @ExcelProperty(value = "用户编号")
    private Integer userId;
    @ExcelProperty(value = "姓名")
    private String userName;
    @ExcelProperty(value = "性别", converter = GenderConverter.class) // 使用自定义转换器
    private Integer gender;
    @ExcelProperty(value = "工资")
    private Double salary;
    @ExcelProperty(value = "入职时间")
    private Date hireDate;
}
2.自定义转换器
/**
 * 自定义转换器，比如数据库中0代表男，1代表女，导出到Excel中需要转换为男和女，注意，需要是public类型的
 */
public static class GenderConverter implements Converter<Integer> {

    private static final String MALE = "男";
    private static final String FEMALE = "女";

    /**
     * Java类型是Integer
     *
     * @return
     */
    @Override
    public Class<?> supportJavaTypeKey() {
        return Integer.class;
    }

    /**
     * Excel类型是String
     *
     * @return
     */
    @Override
    public CellDataTypeEnum supportExcelTypeKey() {
        return CellDataTypeEnum.STRING;
    }

    /**
     * 写入Excel时，将Integer类型的数据转换为String类型
     *
     * @param value
     * @param contentProperty
     * @param globalConfiguration
     * @return
     * @throws Exception
     */
    @Override
    public WriteCellData<?> convertToExcelData(Integer value,
                                               ExcelContentProperty contentProperty,
                                               GlobalConfiguration globalConfiguration) throws Exception {
        // 根据整数值返回对应的性别字符串
        String gender;
        switch (value) {
            case 0:
                gender = MALE;
                break;
            case 1:
                gender = FEMALE;
                break;
            default:
                gender = "未知";
        }
        // 返回转换后的 Excel 单元格数据
        return new WriteCellData<>(gender);
    }

    /**
     * 读取Excel时，将String类型的数据转换为Integer类型
     *
     * @param cellData
     * @param contentProperty
     * @param globalConfiguration
     * @return
     * @throws Exception
     */
    @Override
    public Integer convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
        // 获取Excel的值
        String cellDataStringValue = cellData.getStringValue();
        // 转换为Java的值
        switch (cellDataStringValue) {
            case MALE:
                return 0; // 男，返回0
            case FEMALE:
                return 1; // 女，返回1
            default:
                return -1; // 其他，返回-1
        }
    }
}
3.方法
/**
 * 应用自定义转换器
 */
@Test
public void testWrite10() {
    String fileName = "/Users/sunxiansheng/IdeaProjects/demo/easyexcel-demo/src/main/resources/Write10.xlsx";
    // 1.构建write，指定写入的文件路径
    ExcelWriter excelWriter = EasyExcel.write(fileName)
            .build();
    // 2.构建sheet，指定sheetName和模板
    WriteSheet writeSheet = EasyExcel.writerSheet()
            .sheetName("用户信息")
            .head(Write10.class)
            .build();
    // 3.构造数据
    List<Write10> list = new ArrayList<>();
    for (int i = 1; i <= 10; i++) {
        Write10 user = Write10.builder()
                .userId(i)
                .userName("admin" + i)
                .gender(i % 2 == 0 ? 1 : 0) // 这里插入的是数字，使用自定义转换器转换为男和女
                .salary(i * 1000.00)
                .hireDate(new Date())
                .build();
        list.add(user);
    }
    // 4.write向sheet中写入数据
    excelWriter.write(list, writeSheet);
    // 5.关闭流
    excelWriter.finish();
}
4.结果 Write10.xlsx

CleanShot 2024-10-30 at 16.10.28@2x


http://www.kler.cn/a/459182.html

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