进制转换

转十六进制
public static void main(String[] arg) {
	String assIdNum ="54";	
byte[] intArr = assIdNum.getBytes();
		BigInteger b = new BigInteger(intArr);
		String assid = "0x"+b.toString(16);
		return assid;
	}

public PageInfo formatAssId(PageInfo pageInfo) {
		/*
		 * 转换ID为10进制显示
		 */
		if(pageInfo !=null){
			List baseList = pageInfo.getSearchResult();
			List sonList = new ArrayList();
			List newList = new ArrayList();
			byte[] assIdArr = null; 
			if (baseList !=null && baseList.size()>0) {
				
				for(int i=0 ; i<baseList.size(); i++) {
					sonList = (List)baseList.get(i);
					assIdArr = null;
					String s = (String)sonList.get(11);
					if (s.indexOf("x") !=-1) {
						String str = s.substring(s.indexOf("x")+1);
						int len = str.length();
						String[] strArr = new String[len/2];					
						assIdArr = new byte[len/2];
						int index = 2;  
						for (int n=0; n<strArr.length; n++){
							strArr[n] = str.substring(index*n,index*n+2);
							byte assId = Byte.parseByte(strArr[n], 16);
							assIdArr[n] = assId;
						}
					}
					
					String assId = "";
					if (assIdArr !=null && assIdArr.length>0 ) {
						for (int j=0; j<assIdArr.length; j++) {
							char c = (char)assIdArr[j];
							assId += Character.toString(c);
						}
					}
					if (! "".equals(assId)) {
						sonList.set(11, assId);
					}
					newList.add(sonList);
				}
			}
			
			if (newList !=null && newList.size()>0) {
				pageInfo.setSearchResult(newList);
			}
		}
		return pageInfo;
	}