* 兼容`LocalDate` [Issue #2908](https://github.com/alibaba/easyexcel/issues/2908)

README.md

@@ -27,7 +27,7 @@ easyexcel重写了poi对07版Excel的解析，一个3M的excel用POI sax解析
 <dependency>
     <groupId>com.alibaba</groupId>
     <artifactId>easyexcel</artifactId>
-    <version>3.2.0</version>
+    <version>3.2.1</version>
 </dependency>
 ```
 

easyexcel-core/src/main/java/com/alibaba/excel/converters/DefaultConverterLoader.java

@@ -31,7 +31,10 @@ import com.alibaba.excel.converters.inputstream.InputStreamImageConverter;
 import com.alibaba.excel.converters.integer.IntegerBooleanConverter;
 import com.alibaba.excel.converters.integer.IntegerNumberConverter;
 import com.alibaba.excel.converters.integer.IntegerStringConverter;
-import com.alibaba.excel.converters.localdatetime.LocalDateNumberConverter;
+import com.alibaba.excel.converters.localdate.LocalDateDateConverter;
+import com.alibaba.excel.converters.localdate.LocalDateNumberConverter;
+import com.alibaba.excel.converters.localdate.LocalDateStringConverter;
+import com.alibaba.excel.converters.localdatetime.LocalDateTimeNumberConverter;
 import com.alibaba.excel.converters.localdatetime.LocalDateTimeDateConverter;
 import com.alibaba.excel.converters.localdatetime.LocalDateTimeStringConverter;
 import com.alibaba.excel.converters.longconverter.LongBooleanConverter;
@@ -83,6 +86,9 @@ public class DefaultConverterLoader {
         putAllConverter(new DateStringConverter());
 
         putAllConverter(new LocalDateNumberConverter());
+        putAllConverter(new LocalDateStringConverter());
+
+        putAllConverter(new LocalDateTimeNumberConverter());
         putAllConverter(new LocalDateTimeStringConverter());
 
         putAllConverter(new DoubleBooleanConverter());
@@ -121,6 +127,7 @@ public class DefaultConverterLoader {
         putWriteConverter(new ByteNumberConverter());
         putWriteConverter(new DateDateConverter());
         putWriteConverter(new LocalDateTimeDateConverter());
+        putWriteConverter(new LocalDateDateConverter());
         putWriteConverter(new DoubleNumberConverter());
         putWriteConverter(new FloatNumberConverter());
         putWriteConverter(new IntegerNumberConverter());
@@ -139,6 +146,7 @@ public class DefaultConverterLoader {
         putWriteStringConverter(new BooleanStringConverter());
         putWriteStringConverter(new ByteStringConverter());
         putWriteStringConverter(new DateStringConverter());
+        putWriteStringConverter(new LocalDateStringConverter());
         putWriteStringConverter(new LocalDateTimeStringConverter());
         putWriteStringConverter(new DoubleStringConverter());
         putWriteStringConverter(new FloatStringConverter());

easyexcel-core/src/main/java/com/alibaba/excel/converters/localdate/LocalDateDateConverter.java

@@ -0,0 +1,36 @@
+package com.alibaba.excel.converters.localdate;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+import com.alibaba.excel.converters.Converter;
+import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+import com.alibaba.excel.util.DateUtils;
+import com.alibaba.excel.util.WorkBookUtil;
+
+/**
+ * LocalDate and date converter
+ *
+ * @author Jiaju Zhuang
+ */
+public class LocalDateDateConverter implements Converter<LocalDate> {
+    @Override
+    public Class<?> supportJavaTypeKey() {
+        return LocalDate.class;
+    }
+
+    @Override
+    public WriteCellData<?> convertToExcelData(LocalDate value, ExcelContentProperty contentProperty,
+        GlobalConfiguration globalConfiguration) throws Exception {
+        LocalDateTime localDateTime = value == null ? null : value.atTime(0, 0);
+        WriteCellData<?> cellData = new WriteCellData<>(localDateTime);
+        String format = null;
+        if (contentProperty != null && contentProperty.getDateTimeFormatProperty() != null) {
+            format = contentProperty.getDateTimeFormatProperty().getFormat();
+        }
+        WorkBookUtil.fillDataFormat(cellData, format, DateUtils.defaultLocalDateFormat);
+        return cellData;
+    }
+}

easyexcel-core/src/main/java/com/alibaba/excel/converters/localdate/LocalDateNumberConverter.java

@@ -0,0 +1,57 @@
+package com.alibaba.excel.converters.localdate;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+import com.alibaba.excel.converters.Converter;
+import com.alibaba.excel.enums.CellDataTypeEnum;
+import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.data.ReadCellData;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+import com.alibaba.excel.util.DateUtils;
+
+import org.apache.poi.ss.usermodel.DateUtil;
+
+/**
+ * LocalDate and number converter
+ *
+ * @author Jiaju Zhuang
+ */
+public class LocalDateNumberConverter implements Converter<LocalDate> {
+
+    @Override
+    public Class<?> supportJavaTypeKey() {
+        return LocalDate.class;
+    }
+
+    @Override
+    public CellDataTypeEnum supportExcelTypeKey() {
+        return CellDataTypeEnum.NUMBER;
+    }
+
+    @Override
+    public LocalDate convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty,
+        GlobalConfiguration globalConfiguration) {
+        if (contentProperty == null || contentProperty.getDateTimeFormatProperty() == null) {
+            return DateUtils.getLocalDate(cellData.getNumberValue().doubleValue(),
+                globalConfiguration.getUse1904windowing());
+        } else {
+            return DateUtils.getLocalDate(cellData.getNumberValue().doubleValue(),
+                contentProperty.getDateTimeFormatProperty().getUse1904windowing());
+        }
+    }
+
+    @Override
+    public WriteCellData<?> convertToExcelData(LocalDate value, ExcelContentProperty contentProperty,
+        GlobalConfiguration globalConfiguration) {
+        if (contentProperty == null || contentProperty.getDateTimeFormatProperty() == null) {
+            return new WriteCellData<>(
+                BigDecimal.valueOf(DateUtil.getExcelDate(value, globalConfiguration.getUse1904windowing())));
+        } else {
+            return new WriteCellData<>(BigDecimal.valueOf(
+                DateUtil.getExcelDate(value, contentProperty.getDateTimeFormatProperty().getUse1904windowing())));
+        }
+    }
+}

easyexcel-core/src/main/java/com/alibaba/excel/converters/localdate/LocalDateStringConverter.java

@@ -0,0 +1,52 @@
+package com.alibaba.excel.converters.localdate;
+
+import java.text.ParseException;
+import java.time.LocalDate;
+
+import com.alibaba.excel.converters.Converter;
+import com.alibaba.excel.enums.CellDataTypeEnum;
+import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.data.ReadCellData;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+import com.alibaba.excel.util.DateUtils;
+
+/**
+ * LocalDate and string converter
+ *
+ * @author Jiaju Zhuang
+ */
+public class LocalDateStringConverter implements Converter<LocalDate> {
+    @Override
+    public Class<?> supportJavaTypeKey() {
+        return LocalDate.class;
+    }
+
+    @Override
+    public CellDataTypeEnum supportExcelTypeKey() {
+        return CellDataTypeEnum.STRING;
+    }
+
+    @Override
+    public LocalDate convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty,
+        GlobalConfiguration globalConfiguration) throws ParseException {
+        if (contentProperty == null || contentProperty.getDateTimeFormatProperty() == null) {
+            return DateUtils.parseLocalDate(cellData.getStringValue(), null, globalConfiguration.getLocale());
+        } else {
+            return DateUtils.parseLocalDate(cellData.getStringValue(),
+                contentProperty.getDateTimeFormatProperty().getFormat(), globalConfiguration.getLocale());
+        }
+    }
+
+    @Override
+    public WriteCellData<?> convertToExcelData(LocalDate value, ExcelContentProperty contentProperty,
+        GlobalConfiguration globalConfiguration) {
+        if (contentProperty == null || contentProperty.getDateTimeFormatProperty() == null) {
+            return new WriteCellData<>(DateUtils.format(value, null, globalConfiguration.getLocale()));
+        } else {
+            return new WriteCellData<>(
+                DateUtils.format(value, contentProperty.getDateTimeFormatProperty().getFormat(),
+                    globalConfiguration.getLocale()));
+        }
+    }
+}

easyexcel-core/src/main/java/com/alibaba/excel/converters/localdatetime/LocalDateTimeDateConverter.java

@@ -10,13 +10,13 @@ import com.alibaba.excel.util.DateUtils;
 import com.alibaba.excel.util.WorkBookUtil;
 
 /**
- * Date and date converter
+ * LocalDateTime and date converter
  *
  * @author Jiaju Zhuang
  */
 public class LocalDateTimeDateConverter implements Converter<LocalDateTime> {
     @Override
-    public Class<LocalDateTime> supportJavaTypeKey() {
+    public Class<?> supportJavaTypeKey() {
         return LocalDateTime.class;
     }
 

easyexcel-core/src/main/java/com/alibaba/excel/converters/localdatetime/LocalDateTimeNumberConverter.java

@@ -18,7 +18,7 @@ import org.apache.poi.ss.usermodel.DateUtil;
  *
  * @author Jiaju Zhuang
  */
-public class LocalDateNumberConverter implements Converter<LocalDateTime> {
+public class LocalDateTimeNumberConverter implements Converter<LocalDateTime> {
 
     @Override
     public Class<?> supportJavaTypeKey() {

easyexcel-core/src/main/java/com/alibaba/excel/util/DateUtils.java

@@ -4,7 +4,9 @@ import java.math.BigDecimal;
 import java.text.DateFormat;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
+import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.time.LocalTime;
 import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;
 import java.util.Date;
@@ -59,6 +61,8 @@ public class DateUtils {
 
     public static String defaultDateFormat = DATE_FORMAT_19;
 
+    public static String defaultLocalDateFormat = DATE_FORMAT_10;
+
     private DateUtils() {}
 
     /**
@@ -95,6 +99,25 @@ public class DateUtils {
         }
     }
 
+    /**
+     * convert string to date
+     *
+     * @param dateString
+     * @param dateFormat
+     * @param local
+     * @return
+     */
+    public static LocalDate parseLocalDate(String dateString, String dateFormat, Locale local) {
+        if (StringUtils.isEmpty(dateFormat)) {
+            dateFormat = switchDateFormat(dateString);
+        }
+        if (local == null) {
+            return LocalDate.parse(dateString, DateTimeFormatter.ofPattern(dateFormat));
+        } else {
+            return LocalDate.parse(dateString, DateTimeFormatter.ofPattern(dateFormat, local));
+        }
+    }
+
     /**
      * convert string to date
      *
@@ -188,6 +211,38 @@ public class DateUtils {
         }
     }
 
+    /**
+     * Format date
+     *
+     * @param date
+     * @param dateFormat
+     * @return
+     */
+    public static String format(LocalDate date, String dateFormat) {
+        return format(date, dateFormat, null);
+    }
+
+    /**
+     * Format date
+     *
+     * @param date
+     * @param dateFormat
+     * @return
+     */
+    public static String format(LocalDate date, String dateFormat, Locale local) {
+        if (date == null) {
+            return null;
+        }
+        if (StringUtils.isEmpty(dateFormat)) {
+            dateFormat = defaultLocalDateFormat;
+        }
+        if (local == null) {
+            return date.format(DateTimeFormatter.ofPattern(dateFormat));
+        } else {
+            return date.format(DateTimeFormatter.ofPattern(dateFormat, local));
+        }
+    }
+
     /**
      * Format date
      *
@@ -271,6 +326,25 @@ public class DateUtils {
         return DateUtil.getLocalDateTime(date, use1904windowing, true);
     }
 
+    /**
+     * Given an Excel date with either 1900 or 1904 date windowing,
+     * converts it to a java.time.LocalDate.
+     *
+     * Excel Dates and Times are stored without any timezone
+     * information. If you know (through other means) that your file
+     * uses a different TimeZone to the system default, you can use
+     * this version of the getJavaDate() method to handle it.
+     *
+     * @param date             The Excel date.
+     * @param use1904windowing true if date uses 1904 windowing,
+     *                         or false if using 1900 date windowing.
+     * @return Java representation of the date, or null if date is not a valid Excel date
+     */
+    public static LocalDate getLocalDate(double date, boolean use1904windowing) {
+        LocalDateTime localDateTime = getLocalDateTime(date, use1904windowing);
+        return localDateTime == null ? null : localDateTime.toLocalDate();
+    }
+
     /**
      * Determine if it is a date format.
      *

easyexcel-test/src/test/java/com/alibaba/easyexcel/test/core/converter/ConverterDataListener.java

@@ -3,9 +3,11 @@ package com.alibaba.easyexcel.test.core.converter;
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.text.ParseException;
+import java.time.LocalDate;
 import java.util.ArrayList;
 import java.util.List;
 
+import com.alibaba.easyexcel.test.util.TestUtil;
 import com.alibaba.excel.context.AnalysisContext;
 import com.alibaba.excel.event.AnalysisEventListener;
 import com.alibaba.excel.exception.ExcelCommonException;
@@ -32,12 +34,9 @@ public class ConverterDataListener extends AnalysisEventListener<ConverterReadDa
     public void doAfterAllAnalysed(AnalysisContext context) {
         Assert.assertEquals(list.size(), 1);
         ConverterReadData data = list.get(0);
-        try {
-            Assert.assertEquals(DateUtils.parseDate("2020-01-01 01:01:01"), data.getDate());
-        } catch (ParseException e) {
-            throw new ExcelCommonException("Test Exception", e);
-        }
-        Assert.assertEquals(DateUtils.parseLocalDateTime("2020-01-01 01:01:01", null, null), data.getLocalDateTime());
+        Assert.assertEquals(TestUtil.TEST_DATE, data.getDate());
+        Assert.assertEquals(TestUtil.TEST_LOCAL_DATE, data.getLocalDate());
+        Assert.assertEquals(TestUtil.TEST_LOCAL_DATE_TIME, data.getLocalDateTime());
         Assert.assertEquals(data.getBooleanData(), Boolean.TRUE);
         Assert.assertEquals(data.getBigDecimal().doubleValue(), BigDecimal.ONE.doubleValue(), 0.0);
         Assert.assertEquals(data.getBigInteger().intValue(), BigInteger.ONE.intValue(), 0.0);

easyexcel-test/src/test/java/com/alibaba/easyexcel/test/core/converter/ConverterDataTest.java

@@ -4,10 +4,13 @@ import java.io.File;
 import java.io.InputStream;
 import java.math.BigDecimal;
 import java.math.BigInteger;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.List;
 
 import com.alibaba.easyexcel.test.util.TestFileUtil;
+import com.alibaba.easyexcel.test.util.TestUtil;
 import com.alibaba.excel.EasyExcel;
 import com.alibaba.excel.metadata.data.WriteCellData;
 import com.alibaba.excel.util.DateUtils;
@@ -112,8 +115,9 @@ public class ConverterDataTest {
     private List<ConverterWriteData> data() throws Exception {
         List<ConverterWriteData> list = new ArrayList<ConverterWriteData>();
         ConverterWriteData converterWriteData = new ConverterWriteData();
-        converterWriteData.setDate(DateUtils.parseDate("2020-01-01 01:01:01"));
-        converterWriteData.setLocalDateTime(DateUtils.parseLocalDateTime("2020-01-01 01:01:01", null, null));
+        converterWriteData.setDate(TestUtil.TEST_DATE);
+        converterWriteData.setLocalDate(TestUtil.TEST_LOCAL_DATE);
+        converterWriteData.setLocalDateTime(TestUtil.TEST_LOCAL_DATE_TIME);
         converterWriteData.setBooleanData(Boolean.TRUE);
         converterWriteData.setBigDecimal(BigDecimal.ONE);
         converterWriteData.setBigInteger(BigInteger.ONE);

easyexcel-test/src/test/java/com/alibaba/easyexcel/test/core/converter/ConverterReadData.java

@@ -2,6 +2,7 @@ package com.alibaba.easyexcel.test.core.converter;
 
 import java.math.BigDecimal;
 import java.math.BigInteger;
+import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.util.Date;
 
@@ -22,6 +23,8 @@ public class ConverterReadData {
     @ExcelProperty("日期")
     private Date date;
     @ExcelProperty("本地日期")
+    private LocalDate localDate;
+    @ExcelProperty("本地日期时间")
     private LocalDateTime localDateTime;
     @ExcelProperty("布尔")
     private Boolean booleanData;

easyexcel-test/src/test/java/com/alibaba/easyexcel/test/core/converter/ConverterWriteData.java

@@ -2,6 +2,7 @@ package com.alibaba.easyexcel.test.core.converter;
 
 import java.math.BigDecimal;
 import java.math.BigInteger;
+import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.util.Date;
 
@@ -22,6 +23,8 @@ public class ConverterWriteData {
     @ExcelProperty("日期")
     private Date date;
     @ExcelProperty("本地日期")
+    private LocalDate localDate;
+    @ExcelProperty("本地日期时间")
     private LocalDateTime localDateTime;
     @ExcelProperty("布尔")
     private Boolean booleanData;

easyexcel-test/src/test/java/com/alibaba/easyexcel/test/util/TestUtil.java

@@ -0,0 +1,36 @@
+package com.alibaba.easyexcel.test.util;
+
+import java.io.File;
+import java.io.InputStream;
+import java.text.ParseException;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.util.Date;
+
+import com.alibaba.excel.util.DateUtils;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.Assert;
+
+/**
+ * test util
+ *
+ * @author Jiaju Zhuang
+ */
+@Slf4j
+public class TestUtil {
+
+    public static final Date TEST_DATE;
+    public static final LocalDate TEST_LOCAL_DATE = LocalDate.of(2020, 1, 1);
+    public static final LocalDateTime TEST_LOCAL_DATE_TIME = LocalDateTime.of(2020, 1, 1, 1, 1, 1);
+
+    static {
+        try {
+            TEST_DATE = DateUtils.parseDate("2020-01-01 01:01:01");
+        } catch (ParseException e) {
+            log.error("init TestUtil error.", e);
+            throw new RuntimeException(e);
+        }
+    }
+
+}

pom.xml

@@ -20,7 +20,7 @@
 
 
     <properties>
-        <revision>3.2.0</revision>
+        <revision>3.2.1</revision>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <jdk.version>1.8</jdk.version>
         <gpg.skip>true</gpg.skip>

update.md

@@ -1,3 +1,7 @@
+# 3.2.1
+
+* 兼容`LocalDate` [Issue #2908](https://github.com/alibaba/easyexcel/issues/2908)
+
 # 3.2.0
 
 * 修复部分xlsx读取日期可能相差1秒的bug [Issue #1956](https://github.com/alibaba/easyexcel/issues/1956)