Java 由角度得到风向

气象上把风吹来的方向确定为风的方向。因此,风来自北方叫做北风,风来自南方叫做南风。气象台站预报风时,当风向在某个方位左右摆动不能肯定时，则加以“偏”字,如偏北风。当风力很小时,则采用“风向不定”来说明。风向的测量单位,我们用方位来表示。如陆地上，一般用16个方位表示,海上多用36个方位表示；在高空则用角度表示。用角度表示风向,是把圆周分成360度。北风(N)是0度(即360度)，东风(E)是90度，南风(S)是180度，西风(W)是270度，其余的风向都可以由此计算出来。 

private String getWindDirection(double WIN_D_Avg_2mi){
        String windDirection;
        if(WIN_D_Avg_2mi == 0 || WIN_D_Avg_2mi == 360 ){
            windDirection = "北";
        } else if(WIN_D_Avg_2mi == 90){
            windDirection = "东";
        } else if(WIN_D_Avg_2mi == 180){
            windDirection = "南";
        } else if(WIN_D_Avg_2mi == 270){
            windDirection = "西";
        } else if(WIN_D_Avg_2mi > 0 && WIN_D_Avg_2mi < 90){
            windDirection = "东北";
        } else if(WIN_D_Avg_2mi > 90 && WIN_D_Avg_2mi < 180){
            windDirection = "东南";
        } else if(WIN_D_Avg_2mi > 180 && WIN_D_Avg_2mi < 270){
            windDirection = "西南";
        } else {
            windDirection = "西北";
        }

        return windDirection;
    }