From 3b42abef44bbc439ec2fd63d1b223efc121e945d Mon Sep 17 00:00:00 2001
From: RuoYi <yzz_ivy@163.com>
Date: Wed, 22 Sep 2021 09:03:01 +0800
Subject: [PATCH] =?UTF-8?q?Excel=E6=B3=A8=E8=A7=A3=E6=94=AF=E6=8C=81?=
 =?UTF-8?q?=E8=87=AA=E5=AE=9A=E4=B9=89=E6=95=B0=E6=8D=AE=E5=A4=84=E7=90=86?=
 =?UTF-8?q?=E5=99=A8?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../com/ruoyi/common/annotation/Excel.java    | 13 +++++++-
 .../common/utils/poi/ExcelHandlerAdapter.java | 19 ++++++++++++
 .../com/ruoyi/common/utils/poi/ExcelUtil.java | 31 +++++++++++++++++++
 3 files changed, 62 insertions(+), 1 deletion(-)
 create mode 100644 ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelHandlerAdapter.java

diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/annotation/Excel.java b/ruoyi-common/src/main/java/com/ruoyi/common/annotation/Excel.java
index 50482c57..9fb64da1 100644
--- a/ruoyi-common/src/main/java/com/ruoyi/common/annotation/Excel.java
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/annotation/Excel.java
@@ -5,6 +5,7 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 import java.math.BigDecimal;
+import com.ruoyi.common.utils.poi.ExcelHandlerAdapter;
 
 /**
  * 自定义导出Excel数据注解
@@ -108,7 +109,17 @@ public @interface Excel
     /**
      * 导出字段对齐方式（0：默认；1：靠左；2：居中；3：靠右）
      */
-    Align align() default Align.AUTO;
+    public Align align() default Align.AUTO;
+
+    /**
+     * 自定义数据处理器
+     */
+    public Class<?> handler() default ExcelHandlerAdapter.class;
+
+    /**
+     * 自定义数据处理器参数
+     */
+    public String[] args() default {};
 
     public enum Align
     {
diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelHandlerAdapter.java b/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelHandlerAdapter.java
new file mode 100644
index 00000000..c9ca2d5e
--- /dev/null
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelHandlerAdapter.java
@@ -0,0 +1,19 @@
+package com.ruoyi.common.utils.poi;
+
+/**
+ * Excel数据格式处理适配器
+ * 
+ * @author ruoyi
+ */
+public interface ExcelHandlerAdapter
+{
+    /**
+     * 格式化
+     * 
+     * @param value 单元格数据值
+     * @param args excel注解args参数组
+     *
+     * @return 处理后的值
+     */
+    Object format(Object value, String[] args);
+}
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 0ab074ed..38847905 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
@@ -6,6 +6,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.lang.reflect.Field;
+import java.lang.reflect.Method;
 import java.math.BigDecimal;
 import java.text.DecimalFormat;
 import java.util.ArrayList;
@@ -333,6 +334,10 @@ public class ExcelUtil<T>
                         {
                             val = reverseDictByExp(Convert.toStr(val), attr.dictType(), attr.separator());
                         }
+                        else if (!attr.handler().equals(ExcelHandlerAdapter.class))
+                        {
+                            val = dataFormatHandlerAdapter(val, attr);
+                        }
                         else if (ColumnType.IMAGE == attr.cellType() && StringUtils.isNotEmpty(pictures))
                         {
                             PictureData image = pictures.get(row.getRowNum() + "_" + entry.getKey());
@@ -729,6 +734,10 @@ public class ExcelUtil<T>
                 {
                     cell.setCellValue((((BigDecimal) value).setScale(attr.scale(), attr.roundingMode())).toString());
                 }
+                else if (!attr.handler().equals(ExcelHandlerAdapter.class))
+                {
+                    cell.setCellValue(dataFormatHandlerAdapter(value, attr));
+                }
                 else
                 {
                     // 设置列类型
@@ -901,6 +910,28 @@ public class ExcelUtil<T>
         return DictUtils.getDictValue(dictType, dictLabel, separator);
     }
 
+    /**
+     * 数据处理器
+     * 
+     * @param value 数据值
+     * @param excel 数据注解
+     * @return
+     */
+    public String dataFormatHandlerAdapter(Object value, Excel excel)
+    {
+        try
+        {
+            Object instance = excel.handler().newInstance();
+            Method formatMethod = excel.handler().getMethod("format", new Class[] { Object.class, String[].class });
+            value = formatMethod.invoke(instance, value, excel.args());
+        }
+        catch (Exception e)
+        {
+            log.error("不能格式化数据 " + excel.handler(), e.getMessage());
+        }
+        return Convert.toStr(value);
+    }
+
     /**
      * 合计统计信息
      */