修复`@NumberFormat`注解转换double时可能会丢失精度 #1306

src/main/java/com/alibaba/excel/context/WriteContextImpl.java

@@ -124,8 +124,8 @@ public class WriteContextImpl implements WriteContext {
 
     private boolean selectSheetFromCache(WriteSheet writeSheet) {
         writeSheetHolder = null;
-        Integer sheetNo = null;
-        if (writeSheet.getSheetNo() == null && StringUtils.isEmpty(writeSheet.getSheetName())) {
+        Integer sheetNo = writeSheet.getSheetNo();
+        if (sheetNo == null && StringUtils.isEmpty(writeSheet.getSheetName())) {
             sheetNo = 0;
         }
         if (sheetNo != null) {

src/main/java/com/alibaba/excel/util/NumberUtils.java

@@ -167,6 +167,7 @@ public class NumberUtils {
         RoundingMode roundingMode = contentProperty.getNumberFormatProperty().getRoundingMode();
         DecimalFormat decimalFormat = new DecimalFormat(format);
         decimalFormat.setRoundingMode(roundingMode);
+        decimalFormat.setParseBigDecimal(true);
         return decimalFormat.parse(string);
     }
 }

src/test/java/com/alibaba/easyexcel/test/temp/FillTempTest.java

@@ -13,6 +13,7 @@ import com.alibaba.easyexcel.test.temp.fill.FillData2;
 import com.alibaba.easyexcel.test.util.TestFileUtil;
 import com.alibaba.excel.EasyExcel;
 import com.alibaba.excel.ExcelWriter;
+import com.alibaba.excel.write.merge.OnceAbsoluteMergeStrategy;
 import com.alibaba.excel.write.metadata.WriteSheet;
 
 /**
@@ -33,16 +34,21 @@ public class FillTempTest {
     public void complexFill() {
         // 模板注意 用{} 来表示你要用的变量 如果本来就有"{","}" 特殊字符 用"\{","\}"代替
         // {} 代表普通变量 {.} 代表是list的变量
-        String templateFileName = "D:\\test\\simple.xlsx";
+        OnceAbsoluteMergeStrategy onceAbsoluteMergeStrategy = new OnceAbsoluteMergeStrategy(2, 2, 0, 1);
 
         String fileName = TestFileUtil.getPath() + "complexFill" + System.currentTimeMillis() + ".xlsx";
-        ExcelWriter excelWriter = EasyExcel.write(fileName).withTemplate(templateFileName).build();
-        WriteSheet writeSheet = EasyExcel.writerSheet().build();
-        excelWriter.fill(teamp(), writeSheet);
+        ExcelWriter excelWriter = EasyExcel.write(fileName).registerWriteHandler(onceAbsoluteMergeStrategy).withTemplate(TestFileUtil.readUserHomeFile("test/simple.xlsx")).build();
+        WriteSheet writeSheet0 = EasyExcel.writerSheet(0).build();
+        WriteSheet writeSheet1 = EasyExcel.writerSheet(1).build();
+
+        excelWriter.fill(teamp(), writeSheet0);
+        excelWriter.fill(teamp(), writeSheet1);
+
         Map<String, Object> map = new HashMap<String, Object>();
         map.put("date", "2019年10月9日13:28:28");
         map.put("total", 1000);
-        excelWriter.fill(map, writeSheet);
+        excelWriter.fill(map, writeSheet0);
+
         excelWriter.finish();
     }
 

src/test/java/com/alibaba/easyexcel/test/temp/Lock2Test.java

@@ -28,6 +28,7 @@ import com.alibaba.fastjson.JSON;
  **/
 @Ignore
 public class Lock2Test {
+
     private static final Logger LOGGER = LoggerFactory.getLogger(Lock2Test.class);
 
     @Test
@@ -41,6 +42,15 @@ public class Lock2Test {
         }
     }
 
+    @Test
+    public void test33() throws Exception {
+        File file = TestFileUtil.readUserHomeFile("test/test6.xlsx");
+
+        EasyExcel.read(file, LockData.class, new LockDataListener()).sheet(0).headRowNumber(0)
+            .doRead();
+
+    }
+
     @Test
     public void write() throws Exception {
         String fileName = TestFileUtil.getPath() + "styleWrite" + System.currentTimeMillis() + ".xlsx";
@@ -49,7 +59,7 @@ public class Lock2Test {
         // 背景设置为红色
         headWriteCellStyle.setFillForegroundColor(IndexedColors.RED.getIndex());
         WriteFont headWriteFont = new WriteFont();
-        headWriteFont.setFontHeightInPoints((short)20);
+        headWriteFont.setFontHeightInPoints((short) 20);
         headWriteCellStyle.setWriteFont(headWriteFont);
         // 内容的策略
         WriteCellStyle contentWriteCellStyle = new WriteCellStyle();
@@ -59,7 +69,7 @@ public class Lock2Test {
         contentWriteCellStyle.setFillForegroundColor(IndexedColors.GREEN.getIndex());
         WriteFont contentWriteFont = new WriteFont();
         // 字体大小
-        contentWriteFont.setFontHeightInPoints((short)20);
+        contentWriteFont.setFontHeightInPoints((short) 20);
         contentWriteCellStyle.setWriteFont(contentWriteFont);
         // 这个策略是 头是头的样式 内容是内容的样式 其他的策略可以自己实现
         HorizontalCellStyleStrategy horizontalCellStyleStrategy =

src/test/java/com/alibaba/easyexcel/test/temp/LockData.java

 package com.alibaba.easyexcel.test.temp;
 
+import com.alibaba.excel.annotation.format.NumberFormat;
+
 import lombok.Data;
 
 /**
@@ -9,7 +11,8 @@ import lombok.Data;
  **/
 @Data
 public class LockData {
-    private String string0;
+    @NumberFormat("#.##%")
+    private Double string0;
     private String string1;
     private String string2;
     private String string3;

src/test/java/com/alibaba/easyexcel/test/temp/LockDataListener.java

@@ -18,16 +18,16 @@ import com.alibaba.fastjson.JSON;
  *
  * @author Jiaju Zhuang
  */
-public class LockDataListener extends AnalysisEventListener<Map<Integer, CellData>> {
+public class LockDataListener extends AnalysisEventListener<LockData> {
     private static final Logger LOGGER = LoggerFactory.getLogger(DemoDataListener.class);
     /**
      * 每隔5条存储数据库，实际使用中可以3000条，然后清理list ，方便内存回收
      */
     private static final int BATCH_COUNT = 5;
-    List<Map<Integer, CellData>> list = new ArrayList<Map<Integer, CellData>>();
+    List<LockData> list = new ArrayList<LockData>();
 
     @Override
-    public void invoke(Map<Integer, CellData> data, AnalysisContext context) {
+    public void invoke(LockData data, AnalysisContext context) {
         LOGGER.info("解析到一条数据:{}", JSON.toJSONString(data));
         list.add(data);
         if (list.size() >= BATCH_COUNT) {

src/test/java/com/alibaba/easyexcel/test/temp/WriteV33Test.java

@@ -17,6 +17,7 @@ import com.alibaba.easyexcel.test.demo.write.DemoData;
 import com.alibaba.easyexcel.test.util.TestFileUtil;
 import com.alibaba.excel.EasyExcel;
 import com.alibaba.excel.ExcelWriter;
+import com.alibaba.excel.write.merge.OnceAbsoluteMergeStrategy;
 import com.alibaba.excel.write.metadata.WriteSheet;
 import com.alibaba.excel.write.metadata.style.WriteCellStyle;
 import com.alibaba.excel.write.metadata.style.WriteFont;
@@ -37,8 +38,10 @@ public class WriteV33Test {
     public void test() throws Exception {
         // 方法2 如果写到不同的sheet 同一个对象
         String fileName = TestFileUtil.getPath() + "repeatedWrite" + System.currentTimeMillis() + ".xlsx";
+        OnceAbsoluteMergeStrategy onceAbsoluteMergeStrategy = new OnceAbsoluteMergeStrategy(2, 2, 0, 1);
+
         // 这里 指定文件
-        ExcelWriter excelWriter = EasyExcel.write(fileName, DemoData.class).build();
+        ExcelWriter excelWriter = EasyExcel.write(fileName, DemoData.class).registerWriteHandler(onceAbsoluteMergeStrategy).build();
         WriteSheet writeSheet1 = EasyExcel.writerSheet(1, "模板1").build();
         WriteSheet writeSheet2 = EasyExcel.writerSheet(2, "模板2").build();
         WriteSheet writeSheet3 = EasyExcel.writerSheet(3, "模板3").build();

src/test/java/com/alibaba/easyexcel/test/temp/simple/Wirte.java

@@ -126,6 +126,7 @@ public class Wirte {
         for (int i = 0; i < 10; i++) {
             WriteData data = new WriteData();
             data.setF(300.35f);
+            data.setF1(33f);
             list.add(data);
         }
         return list;

src/test/java/com/alibaba/easyexcel/test/temp/simple/WriteData.java

@@ -11,6 +11,8 @@ import lombok.Data;
  **/
 @Data
 public class WriteData {
-    @ContentStyle(locked = true)
+//    @ContentStyle(locked = true)
     private float f;
+//    @ContentStyle(locked = false)
+    private float f1;
 }

update.md

@@ -9,6 +9,7 @@
 * 修复xls直接读取第2页 `NPE` 的bug [Issue #1280](https://github.com/alibaba/easyexcel/issues/1280)
 * 修复填充的时候，最后一行中间有空行会创建失败的bug
 * 修复`includeColumnIndexes`不包含第列 会无法导出数据的bug [Issue #1346](https://github.com/alibaba/easyexcel/issues/1346)
+* 修复`@NumberFormat`注解转换double时可能会丢失精度 [Issue #1306](https://github.com/alibaba/easyexcel/issues/1306)
 
 # 2.2.3
 * 修改填充数据空数据的bug  [Issue #1274](https://github.com/alibaba/easyexcel/issues/1274)