一. 更新记录

1. v3.x

2. v2.x

二. 基于注解(/src/test/java/modules/Student2.java)

    @ExcelField(title = "学号", order = 1)    private Long id;    @ExcelField(title = "姓名", order = 2)    private String name;    // 写入数据转换器 Student2DateConverter    @ExcelField(title = "入学日期", order = 3, writeConverter = Student2DateConverter.class)    private Date date;    @ExcelField(title = "班级", order = 4)    private Integer classes;    // 读取数据转换器 Student2ExpelConverter    @ExcelField(title = "是否开除", order = 5, readConverter = Student2ExpelConverter.class)    private boolean expel;

三. 读取Excel快速实现

1.待读取Excel(截图)

2. 读取转换器(/src/test/java/converter/Student2ExpelConverter.java)

    /**     * excel是否开除 列数据转换器     */    public class Student2ExpelConverter implements ReadConvertible{            @Override        public Object execRead(String object) {                return object.equals("是");        }    }

3. 读取函数(/src/test/java/base/Excel2Module.java#excel2Object2)

    @Test    public void excel2Object2() {        String path = "D:\\JProject\\Excel4J\\src\\test\\resources\\students_02.xlsx";        try {                        // 1)            // 不基于注解,将Excel内容读至List<List<String>>对象内            List<List<String>> lists = ExcelUtils.getInstance().readExcel2List(path, 1, 2, 0);            System.out.println("读取Excel至String数组：");            for (List<String> list : lists) {                System.out.println(list);            }                        // 2)            // 基于注解,将Excel内容读至List<Student2>对象内            // 验证读取转换函数Student2ExpelConverter             // 注解 `@ExcelField(title = "是否开除", order = 5, readConverter =  Student2ExpelConverter.class)`            List<Student2> students = ExcelUtils.getInstance().readExcel2Objects(path, Student2.class, 0, 0);            System.out.println("读取Excel至对象数组(支持类型转换)：");            for (Student2 st : students) {                System.out.println(st);            }        } catch (Exception e) {            e.printStackTrace();        }    }

4. 读取结果

    读取Excel至String数组：    [10000000000001, 张三, 2016/01/19, 101, 是]    [10000000000002, 李四, 2017-11-17 10:19:10, 201, 否]    读取Excel至对象数组(支持类型转换)：    Student2{id=10000000000001, name='张三', date=Tue Jan 19 00:00:00 CST 2016, classes=101, expel='true'}    Student2{id=10000000000002, name='李四', date=Fri Nov 17 10:19:10 CST 2017, classes=201, expel='false'}    Student2{id=10000000000004, name='王二', date=Fri Nov 17 00:00:00 CST 2017, classes=301, expel='false'}

四. 导出Excel

1. 不基于模板快速导出

1) 导出函数(/src/test/java/base/Module2Excel.java#testList2Excel)

    @Test    public void testList2Excel() throws Exception {                List<List<String>> list2 = new ArrayList<>();        List<String> header = new ArrayList<>();        for (int i = 0; i < 10; i++) {            List<String> _list = new ArrayList<>();            for (int j = 0; j < 10; j++) {                _list.add(i + " -- " + j);            }            list2.add(_list);            header.add(i + "---");        }        ExcelUtils.getInstance().exportObjects2Excel(list2, header, "D:/D.xlsx");    }

2) 导出效果(截图)

2. 带有写入转换器函数的导出

1) 转换器(/src/test/java/converter/Student2DateConverter.java)

    /**     * 导出excel日期数据转换器     */    public class Student2DateConverter implements WriteConvertible {                @Override        public Object execWrite(Object object) {                Date date = (Date) object;            return DateUtils.date2Str(date, DateUtils.DATE_FORMAT_MSEC_T_Z);        }    }

2）导出函数(/src/test/java/base/Module2Excel.java#testWriteConverter)

    // 验证日期转换函数 Student2DateConverter    // 注解 `@ExcelField(title = "入学日期", order = 3, writeConverter = Student2DateConverter.class)`    @Test    public void testWriteConverter() throws Exception {        List<Student2> list = new ArrayList<>();        for (int i = 0; i < 10; i++) {            list.add(new Student2(10000L + i, "学生" + i, new Date(), 201, false));        }        ExcelUtils.getInstance().exportObjects2Excel(list, Student2.class, true, "sheet0", true, "D:/D.xlsx");    }

3) 导出效果(截图)

3. 基于模板List<Oject>导出

1) 导出函数(/src/test/java/base/Module2Excel.java#testObject2Excel)

    @Test    public void testObject2Excel() throws Exception {        String tempPath = "/normal_template.xlsx";        List<Student1> list = new ArrayList<>();        list.add(new Student1("1010001", "盖伦", "六年级三班"));        list.add(new Student1("1010002", "古尔丹", "一年级三班"));        list.add(new Student1("1010003", "蒙多(被开除了)", "六年级一班"));        list.add(new Student1("1010004", "萝卜特", "三年级二班"));        list.add(new Student1("1010005", "奥拉基", "三年级二班"));        list.add(new Student1("1010006", "得嘞", "四年级二班"));        list.add(new Student1("1010007", "瓜娃子", "五年级一班"));        list.add(new Student1("1010008", "战三", "二年级一班"));        list.add(new Student1("1010009", "李四", "一年级一班"));        Map<String, String> data = new HashMap<>();        data.put("title", "战争学院花名册");        data.put("info", "学校统一花名册");        // 基于模板导出Excel        ExcelUtils.getInstance().exportObjects2Excel(tempPath, 0, list, data, Student1.class, false, "D:/A.xlsx");        // 不基于模板导出Excel        ExcelUtils.getInstance().exportObjects2Excel(list, Student1.class, true, null, true, "D:/B.xlsx");    }

2) 导出模板(截图)

3) 基于模板导出结果(截图)

4) 不基于模板导出结果(截图)

4. 基于模板Map<String, Collection<Object.toString>>导出

1) 导出函数(/src/test/java/base/Module2Excel.java#testMap2Excel)

    @Test    public void testMap2Excel() throws Exception {        Map<String, List> classes = new HashMap<>();        Map<String, String> data = new HashMap<>();        data.put("title", "战争学院花名册");        data.put("info", "学校统一花名册");        classes.put("class_one", new ArrayList<Student1>() {{            add(new Student1("1010009", "李四", "一年级一班"));            add(new Student1("1010002", "古尔丹", "一年级三班"));        }});        classes.put("class_two", new ArrayList<Student1>() {{            add(new Student1("1010008", "战三", "二年级一班"));        }});        classes.put("class_three", new ArrayList<Student1>() {{            add(new Student1("1010004", "萝卜特", "三年级二班"));            add(new Student1("1010005", "奥拉基", "三年级二班"));        }});        classes.put("class_four", new ArrayList<Student1>() {{            add(new Student1("1010006", "得嘞", "四年级二班"));        }});        classes.put("class_six", new ArrayList<Student1>() {{            add(new Student1("1010001", "盖伦", "六年级三班"));            add(new Student1("1010003", "蒙多", "六年级一班"));        }});        ExcelUtils.getInstance().exportObject2Excel("/map_template.xlsx",                0, classes, data, Student1.class, false, "D:/C.xlsx");    }

2) 导出模板(截图)

3) 导出结果(截图)

五. Excel模板自定义属性,不区分大小写

1) 具体代码定义详见(/src/main/java/com/github/crab2died/handler/HandlerConstant)

2) Excel模板自定义属性,不区分大小写

六. 多sheet数据导出

1. 多sheet数据导出包装类,详见com.github.sheet.wrapper包内包装类

2. 无模板、无注解的多sheet导出com.github.sheet.wrapper.SimpleSheetWrapper

1) 调用方法

    // 多sheet无模板、无注解导出    @Test    public void testBatchSimple2Excel() throws Exception {        // 生成sheet数据        List<SimpleSheetWrapper> list = new ArrayList<>();        for (int i = 0; i <= 2; i++) {            //表格内容数据            List<String[]> data = new ArrayList<>();            for (int j = 0; j < 1000; j++) {                // 行数据(此处是数组) 也可以是List数据                String[] rows = new String[5];                for (int r = 0; r < 5; r++) {                    rows[r] = "sheet_" + i + "row_" + j + "column_" + r;                }                data.add(rows);            }            // 表头数据            List<String> header = new ArrayList<>();            for (int h = 0; h < 5; h++) {                header.add("column_" + h);            }            list.add(new SimpleSheetWrapper(data, header, "sheet_" + i));        }        ExcelUtils.getInstance().simpleSheet2Excel(list, "K.xlsx");    }

2) 导出结果(截图)

3. 无模板、基于注解的多sheet导出com.github.sheet.wrapper.NoTemplateSheetWrapper

1) 调用方法

    // 多sheet无模板、基于注解的导出    @Test    public void testBatchNoTemplate2Excel() throws Exception {        List<NoTemplateSheetWrapper> sheets = new ArrayList<>();        for (int s = 0; s < 3; s++) {            List<Student2> list = new ArrayList<>();            for (int i = 0; i < 1000; i++) {                list.add(new Student2(10000L + i, "学生" + i, new Date(), 201, false));            }            sheets.add(new NoTemplateSheetWrapper(list, Student2.class, true, "sheet_" + s));        }        ExcelUtils.getInstance().noTemplateSheet2Excel(sheets, "EE.xlsx");    }

2) 导出结果(截图)

4. 基于模板、注解的多sheet导出com.github.sheet.wrapper.NormalSheetWrapper

1) 调用方法(注:为了测试方便，各个sheet数据相同)

    // 基于模板、注解的多sheet导出    @Test    public void testObject2BatchSheet() throws Exception {        List<NormalSheetWrapper> sheets = new ArrayList<>();        for (int i = 0; i < 2; i++) {            List<Student1> list = new ArrayList<>();            list.add(new Student1("1010001", "盖伦", "六年级三班"));            list.add(new Student1("1010002", "古尔丹", "一年级三班"));            list.add(new Student1("1010003", "蒙多(被开除了)", "六年级一班"));            list.add(new Student1("1010004", "萝卜特", "三年级二班"));            list.add(new Student1("1010005", "奥拉基", "三年级二班"));            list.add(new Student1("1010006", "得嘞", "四年级二班"));            list.add(new Student1("1010007", "瓜娃子", "五年级一班"));            list.add(new Student1("1010008", "战三", "二年级一班"));            list.add(new Student1("1010009", "李四", "一年级一班"));            Map<String, String> data = new HashMap<>();            data.put("title", "战争学院花名册");            data.put("info", "学校统一花名册");            sheets.add(new NormalSheetWrapper(i, list, data, Student1.class, false));        }        String tempPath = "/normal_batch_sheet_template.xlsx";        // 基于模板导出Excel        ExcelUtils.getInstance().normalSheet2Excel(sheets, tempPath, "AA.xlsx");    }

2) 导出模板(截图) (注:为了测试方便，模板样式大致相同，单元格颜色有区别)

3) 导出结果(截图)

5. 形如Map<String, Collection<Object.toString>>数据基于模板、注解的多sheet导出com.github.sheet.wrapper.MapSheetWrapper

1) 调用方法(注:为了测试方便，各个sheet数据相同)

    // Map数据的多sheet导出    @Test    public void testMap2BatchSheet() throws Exception {        List<MapSheetWrapper> sheets = new ArrayList<>();        for (int i = 0; i < 2; i++) {            Map<String, List<?>> classes = new HashMap<>();            Map<String, String> data = new HashMap<>();            data.put("title", "战争学院花名册");            data.put("info", "学校统一花名册");            classes.put("class_one", Arrays.asList(                    new Student1("1010009", "李四", "一年级一班"),                    new Student1("1010002", "古尔丹", "一年级三班")            ));            classes.put("class_two", Collections.singletonList(                    new Student1("1010008", "战三", "二年级一班")            ));            classes.put("class_three", Arrays.asList(                    new Student1("1010004", "萝卜特", "三年级二班"),                    new Student1("1010005", "奥拉基", "三年级二班")            ));            classes.put("class_four", Collections.singletonList(                    new Student1("1010006", "得嘞", "四年级二班")            ));            classes.put("class_six", Arrays.asList(                    new Student1("1010001", "盖伦", "六年级三班"),                    new Student1("1010003", "蒙多", "六年级一班")            ));            sheets.add(new MapSheetWrapper(i, classes, data, Student1.class, false));        }        ExcelUtils.getInstance().mapSheet2Excel(sheets, "/map_batch_sheet_template.xlsx", "CC.xlsx");    }

2) 导出模板(截图) (注:为了测试方便，模板样式大致相同，单元格颜色有区别)

3) 导出结果(截图)

七. CSV文件的操作(完全支持ExcelField注解的所有配置)

1. 基于注解读取CSV文件

1) 调用方法

    // 测试读取CSV文件    @Test    public void testReadCSV() throws Excel4JException {        List<Student2> list = ExcelUtils.getInstance().readCSV2Objects("J.csv", Student2.class);        System.out.println(list);    }

2) 读取结果

    Student2{id=1000001, name='张三', date=Wed Nov 28 15:11:12 CST 2018, classes=1, expel='false'}    Student2{id=1010002, name='古尔丹', date=Wed Nov 28 15:11:12 CST 2018, classes=2, expel='false'}    Student2{id=1010003, name='蒙多(被开除了)', date=Wed Nov 28 15:11:12 CST 2018, classes=6, expel='false'}    Student2{id=1010004, name='萝卜特', date=Wed Nov 28 15:11:12 CST 2018, classes=3, expel='false'}    Student2{id=1010005, name='奥拉基', date=Wed Nov 28 15:11:12 CST 2018, classes=4, expel='false'}    Student2{id=1010006, name='得嘞', date=Wed Nov 28 15:11:12 CST 2018, classes=4, expel='false'}    Student2{id=1010007, name='瓜娃子', date=Wed Nov 28 15:11:12 CST 2018, classes=5, expel='false'}    Student2{id=1010008, name='战三', date=Wed Nov 28 15:11:12 CST 2018, classes=4, expel='false'}    Student2{id=1010009, name='李四', date=Wed Nov 28 15:11:12 CST 2018, classes=2, expel='false'}

2. 基于注解导出CSV文件

1) 调用方法

    // 导出csv    @Test    public void testExport2CSV() throws Excel4JException {        List<Student2> list = new ArrayList<>();        list.add(new Student2(1000001L, "张三", new Date(), 1, true));        list.add(new Student2(1010002L, "古尔丹", new Date(), 2, false));        list.add(new Student2(1010003L, "蒙多(被开除了)", new Date(), 6, true));        list.add(new Student2(1010004L, "萝卜特", new Date(), 3, false));        list.add(new Student2(1010005L, "奥拉基", new Date(), 4, false));        list.add(new Student2(1010006L, "得嘞", new Date(), 4, false));        list.add(new Student2(1010007L, "瓜娃子", new Date(), 5, true));        list.add(new Student2(1010008L, "战三", new Date(), 4, false));        list.add(new Student2(1010009L, "李四", new Date(), 2, false));        ExcelUtils.getInstance().exportObjects2CSV(list, Student2.class, "J.csv");    }    // 超大数据量导出csv    // 9999999数据本地测试小于1min    @Test    public void testExport2CSV2() throws Excel4JException {        List<Student2> list = new ArrayList<>();        for (int i = 0; i < 9999999; i++) {            list.add(new Student2(1000001L + i, "路人 -" + i, new Date(), i % 6, true));        }        ExcelUtils.getInstance().exportObjects2CSV(list, Student2.class, "L.csv");    }

2) 导出结果

    // 以下为导出CSV文件内容        学号,姓名,入学日期,班级,是否开除    1000001,张三,2018-11-28T15:11:12.815Z,1,true    1010002,古尔丹,2018-11-28T15:11:12.815Z,2,false    1010003,蒙多(被开除了),2018-11-28T15:11:12.815Z,6,true    1010004,萝卜特,2018-11-28T15:11:12.815Z,3,false    1010005,奥拉基,2018-11-28T15:11:12.815Z,4,false    1010006,得嘞,2018-11-28T15:11:12.815Z,4,false    1010007,瓜娃子,2018-11-28T15:11:12.815Z,5,true    1010008,战三,2018-11-28T15:11:12.815Z,4,false    1010009,李四,2018-11-28T15:11:12.815Z,2,false

八. 使用(JDK1.7及以上)

1) github拷贝项目

>> git clone https://github.com/Crab2died/Excel4J.git Excel4J>> package.cmd

2) 最新版本maven引用：

<dependency>    <groupId>com.github.crab2died</groupId>    <artifactId>Excel4J</artifactId>    <version>3.1.0</version></dependency>