1、註解物件

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({ java.lang.annotation.ElementType.PARAMETER,
	java.lang.annotation.ElementType.METHOD,
	java.lang.annotation.ElementType.FIELD })
@Retention(RetentionPolicy.RUNTIME)
public @interface MaskStringAnnotation {
	//0-沒有 1-中間1/3掩碼 2-全掩碼
	public abstract int maskLevel() default 0;
}
 

        @MaskStringAnnotation(maskLevel = 2)
	private String pId;

        private void printLogs(Object valiObj) throws Exception{
		Field[] fields = valiObj.getClass().getDeclaredFields();
		Field[] pfields = valiObj.getClass().getSuperclass().getDeclaredFields();
		Map<String, String> objs = BeanUtils.describe(valiObj);
		Iterator<String> itor = objs.keySet().iterator();
		while(itor.hasNext()){
			String fName = itor.next();
			int isMask = 0;
			for(int i=0; i<fields.length; i++){
				if(fields[i].getName().equals(fName)){
					if(null != pfields[i].getAnnotation(MaskStringAnnotation.class)){
						isMask = pfields[i].getAnnotation(MaskStringAnnotation.class).maskLevel();
					}
					break;
				}
			}
			for(int i=0; i<pfields.length; i++){
				if(pfields[i].getName().equals(fName)){
					if(null != pfields[i].getAnnotation(MaskStringAnnotation.class)){
						isMask = pfields[i].getAnnotation(MaskStringAnnotation.class).maskLevel();
					}
					break;
				}
			}
			StringBuffer logBuf = new StringBuffer("\t");
			logBuf.append(fName);
			logBuf.append("=\t");
			if(isMask == 1)
				logBuf.append(SimpleStringUtil.stringMask(objs.get(fName)));
			else if(isMask == 2)
				logBuf.append(SimpleStringUtil.stringMask(objs.get(fName), 0 , -1));
			else
				logBuf.append(objs.get(fName));
			log.info(logBuf.toString());
		}
	}
 

public final class SimpleStringUtil {
	
	private static final String maskChar = "*";
	
	/**
	 * @DESC 對字串進行掩碼處理
	 * @param source 原字串
	 * @param start 掩碼開始位置
	 * @param len 掩碼長度
	 * @return
	 */
	public static String stringMask(String source, int start, int len){
		if(null == source) return "";
		if(source.length() < start) return source;
		if(len < 0 || source.length() < start + len) len = source.length() - start;
		String strHead = source.substring(0, start);
		String strTear = source.substring(start + len);
		StringBuffer target =  new StringBuffer(strHead);
		for(int i=0; i<len; i++){
			target.append(maskChar);
		}
		target.append(strTear);
		return target.toString();
	}
	
	/**
	 * @DESC 對字串進行掩碼處理, 對中間1/3字元進行掩碼
	 * @param source 原字串
	 * @return
	 */
	public static String stringMask(String source){
		if(null == source) return "";
		int len = source.length();
		int start = Math.round(len / 3);
		int end = (int)Math.floor(len * 2 / 3);
		String strHead = source.substring(0, start);
		String strTear = source.substring(end);
		StringBuffer target =  new StringBuffer(strHead);
		for(int i=0; i<end - start; i++)
			target.append(maskChar);
		target.append(strTear);
		return target.toString();
	}
}