From 281dc31c4a4d4e2cf266dd65a470c7d29e4e7332 Mon Sep 17 00:00:00 2001
From: 935090232@qq.com <ak473600000>
Date: Wed, 20 Apr 2022 08:24:18 +0800
Subject: [PATCH] fix：修复距离计算精度损失问题
---
zq-erp/src/main/java/com/matrix/system/shopXcx/api/action/YuyueAction.java | 8 ++++----
zq-erp/src/main/java/com/matrix/system/common/tools/LocationUtil.java | 9 ++++++---
2 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/zq-erp/src/main/java/com/matrix/system/common/tools/LocationUtil.java b/zq-erp/src/main/java/com/matrix/system/common/tools/LocationUtil.java
index a741b00..c9b423e 100644
--- a/zq-erp/src/main/java/com/matrix/system/common/tools/LocationUtil.java
+++ b/zq-erp/src/main/java/com/matrix/system/common/tools/LocationUtil.java
@@ -1,5 +1,7 @@
package com.matrix.system.common.tools;
+import java.math.BigDecimal;
+
public class LocationUtil {
private static final double EARTH_RADIUS = 6378.137;
@@ -17,7 +19,7 @@
* shopX 店铺位置经度
* shopY 店铺位置纬度
*/
- public static double getDistance(double locX, double locY, double shopX, double shopY) {
+ public static BigDecimal getDistance(double locX, double locY, double shopX, double shopY) {
double a, b, d, sa2, sb2;
locY = rad(locY);
shopY = rad(shopY);
@@ -29,12 +31,13 @@
d = 2 * EARTH_RADIUS
* Math.asin(Math.sqrt(sa2 * sa2 + Math.cos(locY)
* Math.cos(shopY) * sb2 * sb2));
- return d;
+ return BigDecimal.valueOf(d);
}
public static void main(String[] args) {
// 112.886891,28.222562,114.061937,22.626003 -- 634093.3209722887
// 113.930692,22.939454 -- 597367.3546527711
- System.out.println(getDistance(112.886891d, 28.222562d, 113.930692, 22.939454));
+// System.out.println(getDistance(112.886891d, 28.222562d, 113.930692, 22.939454));
+ System.out.println(BigDecimal.ONE.compareTo(BigDecimal.ZERO)>0);
}
}
diff --git a/zq-erp/src/main/java/com/matrix/system/shopXcx/api/action/YuyueAction.java b/zq-erp/src/main/java/com/matrix/system/shopXcx/api/action/YuyueAction.java
index 19fc17f..47420ba 100644
--- a/zq-erp/src/main/java/com/matrix/system/shopXcx/api/action/YuyueAction.java
+++ b/zq-erp/src/main/java/com/matrix/system/shopXcx/api/action/YuyueAction.java
@@ -122,7 +122,7 @@
return new AjaxResult(AjaxResult.STATUS_SUCCESS, shopList);
}
- Double distance = null;
+ BigDecimal distance = null;
SysShopInfo nearestShop = null;
AjaxResult ajaxResult = new AjaxResult("200", shopList);
@@ -130,9 +130,9 @@
for (SysShopInfo shopInfo : shopList) {
Double shopX = Double.parseDouble(shopInfo.getLongitude());
Double shopY = Double.parseDouble(shopInfo.getLatitude());
- Double disResult = LocationUtil.getDistance(Double.parseDouble(locX), Double.parseDouble(locY), shopX, shopY);
- shopInfo.setDistance(new BigDecimal(disResult).setScale(1, BigDecimal.ROUND_HALF_UP));
- if (distance == null || distance > disResult) {
+ BigDecimal disResult = LocationUtil.getDistance(Double.parseDouble(locX), Double.parseDouble(locY), shopX, shopY);
+ shopInfo.setDistance(disResult);
+ if (distance == null || distance.compareTo(disResult)>0) {
distance = disResult;
nearestShop = shopInfo;
}
--
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