RightsHelper.java
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package com.fh.util;
import java.math.BigInteger;
/**
* 权限计算帮助类
* @author fh qq 3 1 3 5 96790[青苔]
* 修改日期：2015/11/2
*/
public class RightsHelper {
/**
* 利用BigInteger对权限进行2的权的和计算
* @param rights int型权限编码数组
* @return 2的权的和
*/
public static BigInteger sumRights(int[] rights){
BigInteger num = new BigInteger("0");
for(int i=0; i<rights.length; i++){
num = num.setBit(rights[i]);
}
return num;
}
/**
* 利用BigInteger对权限进行2的权的和计算
* @param rights String型权限编码数组
* @return 2的权的和
*/
public static BigInteger sumRights(String[] rights){
BigInteger num = new BigInteger("0");
for(int i=0; i<rights.length; i++){
num = num.setBit(Integer.parseInt(rights[i]));
}
return num;
}
/**
* 测试是否具有指定编码的权限
* @param sum
* @param targetRights
* @return
*/
public static boolean testRights(BigInteger sum,int targetRights){
return sum.testBit(targetRights);
}
/**
* 测试是否具有指定编码的权限
* @param sum
* @param targetRights
* @return
*/
public static boolean testRights(String sum,int targetRights){
if(Tools.isEmpty(sum))
return false;
return testRights(new BigInteger(sum),targetRights);
}
/**
* 测试是否具有指定编码的权限
* @param sum
* @param targetRights
* @return
*/
public static boolean testRights(String sum,String targetRights){
if(Tools.isEmpty(sum))
return false;
return testRights(new BigInteger(sum),targetRights);
}
/**
* 测试是否具有指定编码的权限
* @param sum
* @param targetRights
* @return
*/
public static boolean testRights(BigInteger sum,String targetRights){
return testRights(sum,Integer.parseInt(targetRights));
}
}