计算百分比.txt

java开发中经常用到的代码

private static String getRate(int success,int count){
        String rate="0.00%";
        if(count!=0){
            rate=(double)success/count+"";
            if(success/count>=1){
                rate=rate.replace(".","");
                if(rate.length()<6){
                    while(rate.length()<=6){
                        rate=rate+"0";
                    }
                    rate=rate.substring(0,3)+"."+rate.substring(3, 5)+"%";
                }else {
                    if(Integer.parseInt(rate.charAt(5)+"")>=5){
                        rate=rate.substring(0,3)+"."+rate.substring(3, 4)
                            +(Integer.parseInt(rate.charAt(5)+"")+1)+"%";
                    }else{
                        rate=rate.substring(0,3)+"."+rate.substring(3, 5)+"%";
                    }
                }
            }else{
                if(rate.length()<6){
                    while(rate.length()<=6){
                        rate=rate+"0";
                    }
                    rate=rate.substring(2,4)+"."+rate.substring(4, 6)+"%";
                }else {
                    if(Integer.parseInt(rate.charAt(5)+"")>=5){
                        rate=rate.substring(2,4)+"."+rate.substring(4, 5)
                            +(Integer.parseInt(rate.charAt(5)+"")+1)+"%";
                    }else{
                        rate=rate.substring(2,4)+"."+rate.substring(4, 6)+"%";
                    }
                }
            }
        }
        
        return rate;
    }