From 215952da7a3b78d02d5ec83f1f69974f43dab813 Mon Sep 17 00:00:00 2001
From: RuoYi <yzz_ivy@163.com>
Date: 星期三, 26 八月 2020 11:32:11 +0800
Subject: [PATCH] Excel注解支持自动统计数据总和

---
 src/main/java/com/ruoyi/framework/aspectj/lang/annotation/Excel.java |    5 ++
 src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java              |   69 ++++++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+), 0 deletions(-)

diff --git a/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java b/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
index 5527511..09ad14b 100644
--- a/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
+++ b/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
@@ -16,6 +16,7 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.UUID;
 import java.util.stream.Collectors;
 import org.apache.poi.hssf.usermodel.HSSFDateUtil;
@@ -102,6 +103,16 @@
      * 娉ㄨВ鍒楄〃
      */
     private List<Object[]> fields;
+
+    /**
+     * 缁熻鍒楄〃
+     */
+    private Map<Integer, Double> statistics = new HashMap<Integer, Double>();
+
+    /**
+     * 鏁板瓧鏍煎紡
+     */
+    private static final DecimalFormat DOUBLE_FORMAT = new DecimalFormat("######0.00");
 
     /**
      * 瀹炰綋瀵硅薄
@@ -342,6 +353,7 @@
                 if (Type.EXPORT.equals(type))
                 {
                     fillExcelData(index, row);
+                    addStatisticsRow();
                 }
             }
             String filename = encodingFilename(sheetName);
@@ -448,6 +460,15 @@
         headerFont.setColor(IndexedColors.WHITE.getIndex());
         style.setFont(headerFont);
         styles.put("header", style);
+        
+        style = wb.createCellStyle();
+        style.setAlignment(HorizontalAlignment.CENTER);
+        style.setVerticalAlignment(VerticalAlignment.CENTER);
+        Font totalFont = wb.createFont();
+        totalFont.setFontName("Arial");
+        totalFont.setFontHeightInPoints((short) 10);
+        style.setFont(totalFont);
+        styles.put("total", style);
 
         return styles;
     }
@@ -560,6 +581,7 @@
                     // 璁剧疆鍒楃被鍨�
                     setCellVo(value, attr, cell);
                 }
+                addStatisticsData(column, Convert.toStr(value), attr);
             }
         }
         catch (Exception e)
@@ -727,6 +749,53 @@
     }
 
     /**
+     * 鍚堣缁熻淇℃伅
+     */
+    private void addStatisticsData(Integer index, String text, Excel entity)
+    {
+        if (entity != null && entity.isStatistics())
+        {
+            Double temp = 0D;
+            if (!statistics.containsKey(index))
+            {
+                statistics.put(index, temp);
+            }
+            try
+            {
+                temp = Double.valueOf(text);
+            }
+            catch (NumberFormatException e)
+            {
+            }
+            statistics.put(index, statistics.get(index) + temp);
+        }
+    }
+
+    /**
+     * 鍒涘缓缁熻琛�
+     */
+    public void addStatisticsRow()
+    {
+        if (statistics.size() > 0)
+        {
+            Cell cell = null;
+            Row row = sheet.createRow(sheet.getLastRowNum() + 1);
+            Set<Integer> keys = statistics.keySet();
+            cell = row.createCell(0);
+            cell.setCellStyle(styles.get("total"));
+            cell.setCellValue("鍚堣");
+
+            for (Integer key : keys)
+            {
+                cell = row.createCell(key);
+                cell.setCellStyle(styles.get("total"));
+                cell.setCellValue(DOUBLE_FORMAT.format(statistics.get(key)));
+            }
+            statistics.clear();
+        }
+    }
+
+    /**
      * 缂栫爜鏂囦欢鍚�
      */
     public String encodingFilename(String filename)
diff --git a/src/main/java/com/ruoyi/framework/aspectj/lang/annotation/Excel.java b/src/main/java/com/ruoyi/framework/aspectj/lang/annotation/Excel.java
index 2a333ab..6067946 100644
--- a/src/main/java/com/ruoyi/framework/aspectj/lang/annotation/Excel.java
+++ b/src/main/java/com/ruoyi/framework/aspectj/lang/annotation/Excel.java
@@ -101,6 +101,11 @@
     public String targetAttr() default "";
 
     /**
+     * 鏄惁鑷姩缁熻鏁版嵁,鍦ㄦ渶鍚庤拷鍔犱竴琛岀粺璁℃暟鎹�诲拰
+     */
+    public boolean isStatistics() default false;
+
+    /**
      * 瀛楁绫诲瀷锛�0锛氬鍑哄鍏ワ紱1锛氫粎瀵煎嚭锛�2锛氫粎瀵煎叆锛�
      */
     Type type() default Type.ALL;

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