redisTemplate.opsForGeo().distance 方法用于计算两个地理位置之间的距离。以下是该方法的使用示例：
String key = "mygeokey";
String member1 = "member1";
String member2 = "member2";
// 计算两个成员之间的距离，默认单位为米
Double distance = redisTemplate.opsForGeo().distance(key, member1, member2);
System.out.println("Distance between " + member1 + " and " + member2 + ": " + distance + " meters");
// 指定距离单位为千米
DistanceUnit unit = DistanceUnit.KILOMETERS;
Double distanceInKilometers = redisTemplate.opsForGeo().distance(key, member1, member2, unit);
System.out.println("Distance between " + member1 + " and " + member2 + ": " + distanceInKilometers + " kilometers");
请确保在使用前已经正确配置和初始化了 redisTemplate，并且导入了相关的 Redis 依赖库。
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