class test1{
    private int[] resultArray; // split result.
    private int flag;
    
    test1(int length){
        resultArray = new int[length];
    }
    public static void main(String[] args){
        /* opera */
        int splitRes = 25;
        /* split */
        test1 split = new test1(splitRes/6 + 2);
        split.split(splitRes);
        /* result output */
        System.out.println("input =" + splitRes);
        for(int i =0; i < split.flag; i ++){
         System.out.println("resultArray[" + i + "] = " + split.resultArray[i]);
        }
    }
    /* split */    
     void split(int splitRes){
            if (splitRes >= 6){
                splitRes -= 6;
                resultArray[flag] = 6;
                flag += 1;
                split(splitRes);
            }else if( splitRes >=4 ){
                splitRes -= 4;
                resultArray[flag] = 4;
                flag += 1;
                split(splitRes);
            }else if( splitRes >=2){
                splitRes -= 2;
                resultArray[flag] = 2;
                flag += 1;
                split(splitRes);
            }else if( splitRes >=1){    
                splitRes -= 1;
                resultArray[flag] = 1;
                flag += 1;
                split(splitRes);
            }
                    
    }
}

------解决方案--------------------
Java code

public class split2 {
    
    public static void main(String[] args) {
        int amountOf6 = 0; // the Numbers of 6.
        int amountOf4 = 0; // the Numbers of 4.
        int amountOf2 = 0; // the Numbers of 2.
        int amountOf1 = 0; // the Numbers of 1.
        int pos = 0;
        /* opera*/
        int splitRes = 27; //change the NO. here.
        int[] resultArray = new int[splitRes/6 + 2];
        System.out.println("input =" + splitRes);
        
        /* count the Numbers of 6. */
        amountOf6 = splitRes/6 ;
        splitRes = splitRes%6;
        for (int i =0 ; i< amountOf6 ; i++ ){
            resultArray[i] = 6;
        }
        
        /* count the Numbers of 4. */
        amountOf4 = splitRes/4 ;
        splitRes = splitRes%4;
        for (int i =0 ; i< amountOf4 ; i++ ){
            resultArray[i +amountOf6] = 4;
        }
        
        /* count the Numbers of 2. */
        amountOf2 = splitRes/2 ;
        splitRes = splitRes%2;
        for (int i =0 ; i< amountOf2 ; i++ ){
            resultArray[i+ amountOf6+amountOf4] = 2;
        }
        
        /* count the Numbers of 1. */
        if (splitRes==1){
            amountOf1 = 1;
            resultArray[amountOf6+amountOf4+ amountOf2] = 1;
        }
        /* result output */
        for(int i =0; i < resultArray.length; i++){
         System.out.println("resultArray[" + i + "] = " + resultArray[i]);
        }
    }
}