给首页增加统计折线图的功能

src/main/java/com/jsh/erp/utils/Tools.java

@@ -156,6 +156,41 @@ public class Tools {
         return new SimpleDateFormat("yyyy-MM").format(cal.getTime());
     }
 
+    /**
+     * 获取当前月份的前6个月(含当前月)
+     * @param date
+     * @return
+     */
+    public static List<String> getSixMonth(String date) {
+        List<String> list = new ArrayList<String>();
+        int month = Integer.parseInt(date.substring(5, 7));
+        int year = Integer.parseInt(date.substring(0, 4));
+        for (int i = 5; i >= 0; i--) {
+            if (month > 6) {
+                if (month - i >= 10) {
+                    list.add(year + "-" + String.valueOf(month - i));
+                } else {
+                    list.add(year + "-0" + String.valueOf(month - i));
+                }
+            } else {
+                if (month - i <= 0) {
+                    if (month - i + 12 >= 10) {
+                        list.add(String.valueOf(year - 1) + "-" + String.valueOf(month - i + 12));
+                    } else {
+                        list.add(String.valueOf(year - 1) + "-0" + String.valueOf(month - i + 12));
+                    }
+                } else {
+                    if (month - i >= 10) {
+                        list.add(String.valueOf(year) + "-" + String.valueOf(month - i));
+                    } else {
+                        list.add(String.valueOf(year) + "-0" + String.valueOf(month - i));
+                    }
+                }
+            }
+        }
+        return list;
+    }
+
     /**
      * 截取字符串长度
      *