From eb4376b649a0f8783e8f70406a438ad3c61b8f12 Mon Sep 17 00:00:00 2001
From: RuoYi <yzz_ivy@163.com>
Date: Sun, 10 Oct 2021 14:30:08 +0800
Subject: [PATCH] =?UTF-8?q?Excel=E5=AF=BC=E5=85=A5=E6=94=AF=E6=8C=81@Excel?=
 =?UTF-8?q?s=E6=B3=A8=E8=A7=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../com/ruoyi/common/utils/poi/ExcelUtil.java | 70 +++++++++----------
 1 file changed, 34 insertions(+), 36 deletions(-)

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 fa95291..4169360 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
@@ -268,22 +268,15 @@ public class ExcelUtil<T>
                 }
             }
             // 有数据时才处理 得到类的所有field.
-            Field[] allFields = clazz.getDeclaredFields();
-            // 定义一个map用于存放列的序号和field.
-            Map<Integer, Field> fieldsMap = new HashMap<Integer, Field>();
-            for (int col = 0; col < allFields.length; col++)
+            List<Object[]> fields = this.getFields();
+            Map<Integer, Object[]> fieldsMap = new HashMap<Integer, Object[]>();
+            for (Object[] objects : fields)
             {
-                Field field = allFields[col];
-                Excel attr = field.getAnnotation(Excel.class);
-                if (attr != null && (attr.type() == Type.ALL || attr.type() == type))
+                Excel attr = (Excel) objects[1];
+                Integer column = cellMap.get(attr.name());
+                if (column != null)
                 {
-                    // 设置类的私有字段属性可访问.
-                    field.setAccessible(true);
-                    Integer column = cellMap.get(attr.name());
-                    if (column != null)
-                    {
-                        fieldsMap.put(column, field);
-                    }
+                    fieldsMap.put(column, objects);
                 }
             }
             for (int i = titleNum + 1; i <= rows; i++)
@@ -296,14 +289,15 @@ public class ExcelUtil<T>
                     continue;
                 }
                 T entity = null;
-                for (Map.Entry<Integer, Field> entry : fieldsMap.entrySet())
+                for (Map.Entry<Integer, Object[]> entry : fieldsMap.entrySet())
                 {
                     Object val = this.getCellValue(row, entry.getKey());
 
                     // 如果不存在实例则新建.
                     entity = (entity == null ? clazz.newInstance() : entity);
                     // 从map中得到对应列的field.
-                    Field field = fieldsMap.get(entry.getKey());
+                    Field field = (Field) entry.getValue()[0];
+                    Excel attr = (Excel) entry.getValue()[1];
                     // 取得类型,并根据对象类型设置值.
                     Class<?> fieldType = field.getType();
                     if (String.class == fieldType)
@@ -363,7 +357,6 @@ public class ExcelUtil<T>
                     }
                     if (StringUtils.isNotNull(fieldType))
                     {
-                        Excel attr = field.getAnnotation(Excel.class);
                         String propertyName = field.getName();
                         if (StringUtils.isNotEmpty(attr.targetAttr()))
                         {
@@ -610,8 +603,6 @@ public class ExcelUtil<T>
             {
                 Field field = (Field) os[0];
                 Excel excel = (Excel) os[1];
-                // 设置实体类私有属性可访问
-                field.setAccessible(true);
                 this.addCell(excel, row, vo, field, column++);
             }
         }
@@ -1164,7 +1155,17 @@ public class ExcelUtil<T>
      */
     private void createExcelField()
     {
-        this.fields = new ArrayList<Object[]>();
+        this.fields = getFields();
+        this.fields = this.fields.stream().sorted(Comparator.comparing(objects -> ((Excel) objects[1]).sort())).collect(Collectors.toList());
+        this.maxHeight = getRowHeight();
+    }
+
+    /**
+     * 获取字段注解信息
+     */
+    public List<Object[]> getFields()
+    {
+        List<Object[]> fields = new ArrayList<Object[]>();
         List<Field> tempFields = new ArrayList<>();
         tempFields.addAll(Arrays.asList(clazz.getSuperclass().getDeclaredFields()));
         tempFields.addAll(Arrays.asList(clazz.getDeclaredFields()));
@@ -1173,7 +1174,12 @@ public class ExcelUtil<T>
             // 单注解
             if (field.isAnnotationPresent(Excel.class))
             {
-                putToField(field, field.getAnnotation(Excel.class));
+                Excel attr = field.getAnnotation(Excel.class);
+                if (attr != null && (attr.type() == Type.ALL || attr.type() == type))
+                {
+                    field.setAccessible(true);
+                    fields.add(new Object[] { field, attr });
+                }
             }
 
             // 多注解
@@ -1181,14 +1187,17 @@ public class ExcelUtil<T>
             {
                 Excels attrs = field.getAnnotation(Excels.class);
                 Excel[] excels = attrs.value();
-                for (Excel excel : excels)
+                for (Excel attr : excels)
                 {
-                    putToField(field, excel);
+                    if (attr != null && (attr.type() == Type.ALL || attr.type() == type))
+                    {
+                        field.setAccessible(true);
+                        fields.add(new Object[] { field, attr });
+                    }
                 }
             }
         }
-        this.fields = this.fields.stream().sorted(Comparator.comparing(objects -> ((Excel) objects[1]).sort())).collect(Collectors.toList());
-        this.maxHeight = getRowHeight();
+        return fields;
     }
 
     /**
@@ -1205,17 +1214,6 @@ public class ExcelUtil<T>
         return (short) (maxHeight * 20);
     }
 
-    /**
-     * 放到字段集合中
-     */
-    private void putToField(Field field, Excel attr)
-    {
-        if (attr != null && (attr.type() == Type.ALL || attr.type() == type))
-        {
-            this.fields.add(new Object[] { field, attr });
-        }
-    }
-
     /**
      * 创建一个工作簿
      */