SpringAOP实现功能权限校验功能的示例代码

package com.jykj.demo.filter;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import com.alibaba.fastjson.JSON;
import com.jykj.demo.util.Helper;
import com.jykj.demo.util.Result;

public class SecurityInterceptor implements HandlerInterceptor{
 @Override
 public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
   throws Exception {
  System.out.println("SecurityInterceptor:"+request.getContextPath()+","+request.getRequestURI()+","+request.getMethod());
  HttpSession session = request.getSession();
  if (session.getAttribute(Helper.SESSION_USER) == null) {
   System.out.println("AuthorizationException:未登录！"+request.getMethod());
   if("POST".equalsIgnoreCase(request.getMethod())){
    response.setContentType("text/html; charset=utf-8"); 
    PrintWriter out = response.getWriter(); 
    out.write(JSON.toJSONString(new Result(false,"未登录！")));
    out.flush();
    out.close();
   }else{
    response.sendRedirect(request.getContextPath()+"/login"); 
   }
   return false;
  } else {
   return true;
  }
 }

 @Override
 public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
   ModelAndView modelAndView) throws Exception {
  // TODO Auto-generated method stub
 }

 @Override
 public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
   throws Exception {
  // TODO Auto-generated method stub
 }
}

package com.jykj.demo.filter;
import java.io.IOException;
import java.lang.reflect.Method;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import com.jykj.demo.annotation.ValidatePermission;
import com.jykj.demo.exception.AccessDeniedException;
import com.jykj.demo.service.SysUserRolePermService;
/**
 * 事件日志 切面,凡是带有 @ValidatePermission 以及@ResponseBody注解 控制器 都要进行 功能权限检查，
 * 若无权限，则抛出AccessDeniedException 异常，该异常将请求转发至一个控制器，然后将异常结果返回
 * @author Administrator
 *
 */
public class PermissionAspect {
 @Autowired
 SysUserRolePermService sysUserRolePermService;
 public void doBefore(JoinPoint jp) throws IOException{
  System.out.println(
    "log PermissionAspect Before method: " + jp.getTarget().getClass().getName() + "." + jp.getSignature().getName());
  Method soruceMethod = getSourceMethod(jp);
  if(soruceMethod!=null){
   ValidatePermission oper = soruceMethod.getAnnotation(ValidatePermission.class);
   if (oper != null) {
    int fIdx = oper.idx();
    Object[] args = jp.getArgs();
    if (fIdx>= 0 &&fIdx

package com.jykj.demo.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
 * @Descrption该注解是标签型注解，被此注解标注的方法需要进行权限校验
 */
@Target(value = ElementType.METHOD)
@Retention(value = RetentionPolicy.RUNTIME)
@Documented
public @interface ValidatePermission {
 /**
  * @Description功能Id的参数索引位置 默认为0，表示功能id在第一个参数的位置上，-1则表示未提供，无法进行校验
  */
 int idx() default 0;
}

  
  
   
    
    forward:/accessDenied
   
  
 

  
  
   
    
    
   
 

@RequestMapping(value = "/moduleAccess.do", method = RequestMethod.POST, produces="text/html;charset=utf-8")
 @ResponseBody
 @ValidatePermission
 public String moduleAccess(int fid,String action,FrmModule module) {
  System.out.println("fid:"+fid+",action:"+action);
  int rs = -1;
  try{
   if(Helper.F_ACTION_CREATE.equals(action)){
    rs = moduleService.access(module,Helper.DB_ACTION_INSERT);
    //module.setModuleid(rs);
    module = moduleService.selectByPrimaryKey(rs);
   }else if(Helper.F_ACTION_EDIT.equals(action)){
    rs = moduleService.access(module,Helper.DB_ACTION_UPDATE);
    module = moduleService.selectByPrimaryKey(module.getModuleid());
   }else if(Helper.F_ACTION_REMOVE.equals(action)){
    rs = moduleService.access(module,Helper.DB_ACTION_DELETE);
   }else{
    return JSON.toJSONString(new Result(false,"请求参数错误：action"));
   }
  }catch(Exception e){
   e.printStackTrace();
   return JSON.toJSONString(new Result(false,"操作失败,出现异常，请联系管理员！"));
  }
  if(rs<0){
   return JSON.toJSONString(new Result(false,"操作失败，请联系管理员！"));
  }
  return JSON.toJSONString(new Result(true,module));
 }

@RequestMapping(value = "/accessDenied",produces = "text/html;charset=UTF-8")
@ResponseBody
public String accessDenied(){
 return JSON.toJSONString(new Result(false,"您没有权限对此进行操作！"));
}

/**
  * 校验当前用户在某个模块的某个功能的权限
  * @param functionId
  * @return 空字符串表示 有权限 ，否则是错误信息
  * @throws Exception 
  */
 public String permissionValidate(int functionId){
  Object o = request.getSession().getAttribute(Helper.SESSION_USER);
  //if(o==null) throw new AuthorizationException(); 
  SysUser loginUser= (SysUser)o;
  if(loginUser.getUserid() == 1) return "";
  try{
   return mapper.permissionValidate(loginUser.getUserid(),functionId);
  }catch(Exception ex){
   ex.printStackTrace();
   return "数据库操作出现异常！";
  }
 }