From f5b90af6d01dcf82d1978c156f0882181807e1e9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=96=AF=E7=8B=82=E7=9A=84=E7=8B=AE=E5=AD=90li?=
 <15040126243@163.com>
Date: Tue, 24 Aug 2021 14:28:39 +0800
Subject: [PATCH] =?UTF-8?q?add=20=E5=A2=9E=E5=8A=A0=20=E5=AF=BC=E5=87=BA?=
 =?UTF-8?q?=E9=9B=AA=E8=8A=B1id=20excel=E5=A4=B1=E7=9C=9F=E9=97=AE?=
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---
 .../common/convert/ExcelBigNumberConvert.java | 51 +++++++++++++++++++
 .../com/ruoyi/common/utils/poi/ExcelUtil.java |  3 ++
 .../demo/controller/TestDemoController.java   |  4 ++
 .../java/com/ruoyi/demo/domain/TestDemo.java  |  3 --
 .../com/ruoyi/demo/domain/vo/TestDemoVo.java  |  1 +
 5 files changed, 59 insertions(+), 3 deletions(-)
 create mode 100644 ruoyi-common/src/main/java/com/ruoyi/common/convert/ExcelBigNumberConvert.java

diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/convert/ExcelBigNumberConvert.java b/ruoyi-common/src/main/java/com/ruoyi/common/convert/ExcelBigNumberConvert.java
new file mode 100644
index 000000000..df1f95a0f
--- /dev/null
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/convert/ExcelBigNumberConvert.java
@@ -0,0 +1,51 @@
+package com.ruoyi.common.convert;
+
+import cn.hutool.core.convert.Convert;
+import cn.hutool.core.util.ObjectUtil;
+import com.alibaba.excel.converters.Converter;
+import com.alibaba.excel.enums.CellDataTypeEnum;
+import com.alibaba.excel.metadata.CellData;
+import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+import lombok.extern.slf4j.Slf4j;
+
+import java.math.BigDecimal;
+
+/**
+ * 大数值转换
+ * Excel 数值长度位15位 大于15位的数值转换位字符串
+ *
+ * @author Lion Li
+ */
+@Slf4j
+public class ExcelBigNumberConvert implements Converter<Long> {
+
+	@Override
+	public Class<Long> supportJavaTypeKey() {
+		return Long.class;
+	}
+
+	@Override
+	public CellDataTypeEnum supportExcelTypeKey() {
+		return CellDataTypeEnum.STRING;
+	}
+
+	@Override
+	public Long convertToJavaData(CellData cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) {
+		return Convert.toLong(cellData.getData());
+	}
+
+	@Override
+	public CellData<Object> convertToExcelData(Long object, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) {
+		if (ObjectUtil.isNotNull(object)) {
+			String str = Convert.toStr(object);
+			if (str.length() > 15) {
+				return new CellData<>(str);
+			}
+		}
+		CellData<Object> cellData = new CellData<>(new BigDecimal(object));
+		cellData.setType(CellDataTypeEnum.NUMBER);
+		return cellData;
+	}
+
+}
diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java b/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
index e5d385f2d..4060b1794 100644
--- a/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
@@ -3,6 +3,7 @@ package com.ruoyi.common.utils.poi;
 import cn.hutool.core.util.IdUtil;
 import com.alibaba.excel.EasyExcel;
 import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
+import com.ruoyi.common.convert.ExcelBigNumberConvert;
 import com.ruoyi.common.utils.DictUtils;
 import com.ruoyi.common.utils.StringUtils;
 import com.ruoyi.common.utils.file.FileUtils;
@@ -52,6 +53,8 @@ public class ExcelUtil {
 				.autoCloseStream(false)
 				// 自动适配
 				.registerWriteHandler(new LongestMatchColumnWidthStyleStrategy())
+				// 大数值自动转换 防止失真
+				.registerConverter(new ExcelBigNumberConvert())
 				.sheet(sheetName).doWrite(list);
 		} catch (IOException e) {
 			throw new RuntimeException("导出Excel异常");
diff --git a/ruoyi-demo/src/main/java/com/ruoyi/demo/controller/TestDemoController.java b/ruoyi-demo/src/main/java/com/ruoyi/demo/controller/TestDemoController.java
index db5db8c5f..563704e05 100644
--- a/ruoyi-demo/src/main/java/com/ruoyi/demo/controller/TestDemoController.java
+++ b/ruoyi-demo/src/main/java/com/ruoyi/demo/controller/TestDemoController.java
@@ -72,6 +72,10 @@ public class TestDemoController extends BaseController {
     @GetMapping("/export")
     public void export(@Validated TestDemoBo bo, HttpServletResponse response) {
         List<TestDemoVo> list = iTestDemoService.queryList(bo);
+		// 测试雪花id导出
+//        for (TestDemoVo vo : list) {
+//			vo.setId(1234567891234567893L);
+//		}
 		ExcelUtil.exportExcel(list, "测试单表", TestDemoVo.class, response);
     }
 
diff --git a/ruoyi-demo/src/main/java/com/ruoyi/demo/domain/TestDemo.java b/ruoyi-demo/src/main/java/com/ruoyi/demo/domain/TestDemo.java
index 13fdc2400..21149d80d 100644
--- a/ruoyi-demo/src/main/java/com/ruoyi/demo/domain/TestDemo.java
+++ b/ruoyi-demo/src/main/java/com/ruoyi/demo/domain/TestDemo.java
@@ -1,8 +1,6 @@
 package com.ruoyi.demo.domain;
 
 import com.baomidou.mybatisplus.annotation.*;
-import com.fasterxml.jackson.databind.annotation.JsonSerialize;
-import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 import lombok.experimental.Accessors;
@@ -29,7 +27,6 @@ public class TestDemo implements Serializable {
 	 * 主键
 	 */
     @TableId(value = "id")
-	@JsonSerialize(using = ToStringSerializer.class)
     private Long id;
 
     /**
diff --git a/ruoyi-demo/src/main/java/com/ruoyi/demo/domain/vo/TestDemoVo.java b/ruoyi-demo/src/main/java/com/ruoyi/demo/domain/vo/TestDemoVo.java
index 3c8e45234..4919bbde2 100644
--- a/ruoyi-demo/src/main/java/com/ruoyi/demo/domain/vo/TestDemoVo.java
+++ b/ruoyi-demo/src/main/java/com/ruoyi/demo/domain/vo/TestDemoVo.java
@@ -26,6 +26,7 @@ public class TestDemoVo {
 	/**
      *  主键
      */
+	@ExcelProperty(value = "主键")
 	@ApiModelProperty("主键")
 	private Long id;