1 springmvc 权限控制中写的一个小小的工具类1

package com.er07.book.springmvc.util;

import java.io.File;
import java.lang.reflect.Method;
import java.net.URL;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.er07.book.springmvc.service.RightService;

/**
 * 增加权限
 * @version 1.0  @author 高元东 
 * I'm glad to share with you my learning techniques！
 * @mailto [email protected]
 * 2013-3-11
 */

public class RegRightUtils {
	
	
	private static final String rootUrl = "/spring";
	private static RightService rightService;
	
	/***
	 * 
	 * @mailto [email protected]
	 * @param args
	 * @throws Exception
	 */
	public static void main(String[] args) throws Exception {
		
		ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
	   rightService = context.getBean(RightService.class);
		ClassLoader classLoader = RegRightUtils.class.getClassLoader();
		 URL url = classLoader.getResource("com/er07/book/springmvc/controller");
		String rootPath = url.getPath().toString();
		 File rootFile = new File(rootPath);
		 File [] files = rootFile.listFiles();
		 for(File f: files) {
			 System.err.println(f.getName());
			 String className = f.getName().substring(0, f.getName().indexOf(".class"));
			 Class clazz = Class.forName("com.er07.book.springmvc.controller."+className);
			 parseClass(clazz);  //解析  出url
		 }
		 
	}

	
	/**
	 * 
	 * 规定  第一个 路径目录为调用的 方法   
	 * 解析  出此类上的requestMapping 注解的value 值
	 * @mailto [email protected]
	 * @param clazz
	 */
	public  static void parseClass(Class clazz) {
	  
		
		if(clazz.isAnnotationPresent(Controller.class)) {   //是否为一个controller ? 
		String classUrl ="";
		  if(clazz.isAnnotationPresent(RequestMapping.class)) {
			  RequestMapping requestMapping_clazz = (RequestMapping) clazz.getAnnotation(RequestMapping.class);
			   classUrl = requestMapping_clazz.value()[0];
			   
			   if(classUrl.equals("/")) {  //如果是"/" 的话  制空    
				   classUrl ="";
			   }
		  }
		  Method [] ms = clazz.getDeclaredMethods();
		  
		  for(Method m :ms) {
			  
			  if(m.isAnnotationPresent(RequestMapping.class)) {
				  RequestMapping requestMapping_method = m.getAnnotation(RequestMapping.class);
				  String methodUrl = requestMapping_method.value()[0];
				  
				    int  index = methodUrl.indexOf("/");
				    index = methodUrl.indexOf("/",index+1);
				    if(index!=-1) {  //如果存在 则进行截取前面的url 
				    	
				    	methodUrl = methodUrl.substring(0, index);
				    }
				  String resultUrl = rootUrl+classUrl+methodUrl;
				  rightService.appendRightByUrl(resultUrl);
			  }
		  }
		}
	}
}

package com.er07.book.springmvc.service.impl;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.er07.book.springmvc.dao.RightDao;
import com.er07.book.springmvc.model.Right;
import com.er07.book.springmvc.service.RightService;
import com.er07.book.springmvc.util.StringUtil;
import com.er07.book.springmvc.util.ValidateUtil;

/**
 * 权限管理
 * @version 1.0  @author 高元东 
 * I'm glad to share with you my learning techniques！
 * @mailto [email protected]
 * 2013-3-11
 */
@Service
public class RightServiceImpl implements RightService {

	@Resource
	private RightDao rightDao;

	
	
	/**
	 * 保存或者更新权限  根据要求生成权限码
	 * @mailto [email protected]
	 * @param right
	 */
	public void saveOrUpdateRight(Right right) {
		
		long rightCode =1l;
		int rightPos =0;
		
		//是否插入
		if(right.getId()==null) {
			 String hql ="select max(r.rightPos),max(r.rightCode) from Right r where r.rightPos = (select max(rr.rightPos) from Right rr)";
			   Object[] obj = (Object[]) this.rightDao.uniqueResult(hql);
			   Integer topPos = (Integer) obj[0];
			   Long topCode = (Long) obj[1];
			   if(topPos==null) {
				   rightCode = 1;
				   rightPos = 0;
			   } else {
				   
				   //达到没有最大值吗？ 
				   if(topCode>=1l<<60) {//达到最大值
					   rightPos = topPos+1;
					   rightCode =1l;
				   } else {  //没有达到最大值
					   
					   rightCode = topCode<<1;
					   rightPos = topPos;
				   }
				   
			   }
			   //设置 权限位和权限码  保存在数据库中
			   right.setRightCode(rightCode);
			   right.setRightPos(rightPos);
			   
		}
		this.rightDao.saveOrUpdateEntity(right);
		
	}
	/**
	 * 通过 url 增加或修改权限
	 */
	public void appendRightByUrl(String url) {
		
		//查询 此url 在数据库中是否存在  此权限
		String hql = "from Right where rightUrl =?";
		Right r = (Right) this.rightDao.uniqueResult(hql, url);
		if(r==null) { //不存在 , 插入数据库中
			Right newRight = new Right();
			newRight.setRightUrl(url);
			this.saveOrUpdateRight(newRight);
			
		}
	}
	/**
	 * 查找在指定范围内的 权限集合
	 */
	public List<Right> findRangeRight(Integer[] ownRightIds) {
		
		if(!ValidateUtil.isValid(ownRightIds)) {
			
			return null;
		} else {
			String hql = "from Right where id in("+StringUtil.arr2Str(ownRightIds)+")";
			List<Right> rights = this.rightDao.findEntityByHQL(hql);
			return rights;
		}
	}
	/***
	 * 查找所有权限
	 */
	public List<Right> findAllRights() {
		return this.rightDao.findEntityByHQL("from Right");
	}
	/**
	 * 查找最大的权限位
	 */
	public int findMaxRightPos() {
		String hql ="select max(rightPos) from Right";
		Integer max = (Integer) this.rightDao.uniqueResult(hql);
		 return max==null?0:max;
	}
}