Java中如何通过经纬度坐标获取两个点之间的直线距离
前言现在很多App都需要附带着附近人列表功能，所以我在这里实现2个点之间的距离计算
经纬度的获取需要第三方来支持，高德地图、百度地图….附近人功能具体的实现逻辑：
获取每个人的经纬度坐标，存库记录
通过SQL获取指定距离范围内的用户列表（文章中的MySQL中通过经纬度，获取范围内的用户）
通过获取到的用户列表，计算自己与用户之间度距离（文章中的JAVA代码实现计算AB两点的直线距离）
方法一：JAVA代码实现计算AB两点的直线距离已知A、B两个点的经纬度，在代码中计算出直线距离
1234567891011121314151617181920212223242526272829303132333435363738394041424344import java.math.BigDecimal;import java.util.HashMap;import java.util.Map; public class DistanceUtil { // 椭球的长半轴 private static double EARTH_RADIUS = 6378.137; ...
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