统计查询导出

src/main/java/com/peanut/common/excel/ContributionStatQuery.java

@@ -0,0 +1,26 @@
+package com.peanut.common.excel;
+
+import com.alibaba.excel.annotation.ExcelProperty;
+import lombok.Data;
+
+import java.math.BigDecimal;
+import java.util.List;
+
+@Data
+public class ContributionStatQuery {
+
+    @ExcelProperty(value = "序号")
+    private int no;
+    @ExcelProperty(value = "星级")
+    private String level;
+    @ExcelProperty(value = "姓名")
+    private String userName;
+    @ExcelProperty(value = "手机号")
+    private String userTel;
+    @ExcelProperty(value = "明细")
+    private String contribution;
+    @ExcelProperty(value = "湖分")
+    private BigDecimal score;
+
+
+}

src/main/java/com/peanut/common/excel/CustomMergeStrategy.java

@@ -0,0 +1,83 @@
+package com.peanut.common.excel;
+
+import com.alibaba.excel.metadata.Head;
+import com.alibaba.excel.write.merge.AbstractMergeStrategy;
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.util.CellRangeAddress;
+import org.springframework.util.CollectionUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+// 自定义合并策略 该类继承了AbstractMergeStrategy抽象合并策略，需要重写merge()方法
+public class CustomMergeStrategy extends AbstractMergeStrategy {
+
+    /**
+     * 分组，每几行合并一次
+     */
+    private List<Integer> exportFieldGroupCountList;
+
+    /**
+     * 目标合并列index
+     */
+    private Integer targetColumnIndex;
+
+    // 需要开始合并单元格的首行index
+    private Integer rowIndex;
+
+    // exportDataList为待合并目标列的值
+    public CustomMergeStrategy(List<String> exportDataList, Integer targetColumnIndex) {
+        this.exportFieldGroupCountList = getGroupCountList(exportDataList);
+        this.targetColumnIndex = targetColumnIndex;
+    }
+
+
+    @Override
+    protected void merge(Sheet sheet, Cell cell, Head head, Integer relativeRowIndex) {
+
+        if (null == rowIndex) {
+            rowIndex = cell.getRowIndex();
+        }
+        // 仅从首行以及目标列的单元格开始合并，忽略其他
+        if (cell.getRowIndex() == rowIndex && cell.getColumnIndex() == targetColumnIndex) {
+            mergeGroupColumn(sheet);
+        }
+    }
+
+    private void mergeGroupColumn(Sheet sheet) {
+        int rowCount = rowIndex;
+        for (Integer count : exportFieldGroupCountList) {
+            if(count == 1) {
+                rowCount += count;
+                continue ;
+            }
+            // 合并单元格
+            CellRangeAddress cellRangeAddress = new CellRangeAddress(rowCount, rowCount + count - 1, targetColumnIndex, targetColumnIndex);
+            sheet.addMergedRegionUnsafe(cellRangeAddress);
+            rowCount += count;
+        }
+    }
+
+    // 该方法将目标列根据值是否相同连续可合并，存储可合并的行数
+    private List<Integer> getGroupCountList(List<String> exportDataList){
+        if (CollectionUtils.isEmpty(exportDataList)) {
+            return new ArrayList<>();
+        }
+
+        List<Integer> groupCountList = new ArrayList<>();
+        int count = 1;
+
+        for (int i = 1; i < exportDataList.size(); i++) {
+            if (exportDataList.get(i).equals(exportDataList.get(i - 1))) {
+                count++;
+            } else {
+                groupCountList.add(count);
+                count = 1;
+            }
+        }
+        // 处理完最后一条后
+        groupCountList.add(count);
+        return groupCountList;
+    }
+}