Nginx IP集群选择算法Java

package com.csst.msm;

public class Test {

    /**
     * @param args
     */
    public static void main(String[] args) {
        int hash =89;//初始值
        int serverNum =2;//服务器个数
        int addrlen=3;//IPV4 只计算前3个字节
        int p;
        
        int[] addr = new int[]{192,168,10,14};
        for(int i=0;i<addrlen;i++){//只计算了前3个字节
            hash = (hash*113+addr[i]) % 6271;
        }
        
        p =hash % serverNum;
        System.out.println("选择的服务器："+p);
        //权重算法        
        
        int[] weights = new int[]{9,9};
        int total_weight =weights[0]+weights[1];
        int w =hash %total_weight;
        
        int j=0;
        for(j=0;j<serverNum;j++){
            w -= weights[j];
            if(w<0)
                break;
        }
         p = j;
         System.out.println("按权重,选择的服务器："+p);
        
    }

}