ThreadLocal和Filter实现登录请求的拦截

package com.learn.common;

import com.learn.model.SysUser;

import javax.servlet.http.HttpServletRequest;

public class RequestHolder {

    private static final ThreadLocal userHolder = new ThreadLocal();

    private static final ThreadLocal requestHolder = new ThreadLocal();

    public static void add(SysUser sysUser) {
        userHolder.set(sysUser);
    }

    public static void add(HttpServletRequest request) {
        requestHolder.set(request);
    }

    public static SysUser getCurrentUser() {
        return userHolder.get();
    }

    public static HttpServletRequest getCurrentRequest() {
        return requestHolder.get();
    }

    public static void remove() {
        userHolder.remove();
        requestHolder.remove();
    }
}

package com.learn.common;

import com.learn.util.JsonMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;

@Slf4j
public class HttpInterceptor extends HandlerInterceptorAdapter {

    private static final String START_TIME = "requestStartTime";

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String url = request.getRequestURI().toString();
        Map parameterMap = request.getParameterMap();
        log.info("request start. url:{}, params:{}", url, JsonMapper.obj2String(parameterMap));
        long start = System.currentTimeMillis();
        request.setAttribute(START_TIME, start);
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
//        String url = request.getRequestURI().toString();
//        long start = (Long) request.getAttribute(START_TIME);
//        long end = System.currentTimeMillis();
//        log.info("request finished. url:{}, cost:{}", url, end - start);
        removeThreadLocalInfo();
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        String url = request.getRequestURI().toString();
        long start = (Long) request.getAttribute(START_TIME);
        long end = System.currentTimeMillis();
        log.info("request completed. url:{}, cost:{}", url, end - start);

        removeThreadLocalInfo();
    }

    public void removeThreadLocalInfo() {
        RequestHolder.remove();
    }
}

package com.learn.filter;

import com.learn.common.RequestHolder;
import com.learn.model.SysUser;
import lombok.extern.slf4j.Slf4j;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Slf4j
public class LoginFilter implements Filter {

    public void init(FilterConfig filterConfig) throws ServletException {

    }

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) servletRequest;
        HttpServletResponse resp = (HttpServletResponse) servletResponse;

        SysUser sysUser = (SysUser)req.getSession().getAttribute("user");
        if (sysUser == null) {
            String path = "/signin.jsp";
            resp.sendRedirect(path);
            return;
        }
        RequestHolder.add(sysUser);
        RequestHolder.add(req);
        filterChain.doFilter(servletRequest, servletResponse);
        return;
    }

    public void destroy() {

    }
}

  
    loginFilter
    com.learn.filter.LoginFilter
  
  
    loginFilter
    /sys/*
    /admin/*
  

package com.learn.controller;

import com.learn.common.JsonData;
import com.learn.dto.DeptLevelDto;
import com.learn.param.DeptParam;
import com.learn.service.SysDeptService;
import com.learn.service.SysTreeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import java.util.List;

@Controller
@RequestMapping("/sys/dept")
@Slf4j
public class SysDeptController {

    @Resource
    private SysDeptService sysDeptService;

    @RequestMapping("/save.json")
    @ResponseBody
    public JsonData saveDept(DeptParam param) {
        sysDeptService.save(param);
        return JsonData.success();
    }

    @RequestMapping("/update.json")
    @ResponseBody
    public JsonData updateDept(DeptParam param) {
        sysDeptService.update(param);
        return JsonData.success();
    }

}

package com.learn.service;

import com.google.common.base.Preconditions;
import com.learn.common.RequestHolder;
import com.learn.dao.SysDeptMapper;
import com.learn.dao.SysUserMapper;
import com.learn.exception.ParamException;
import com.learn.model.SysDept;
import com.learn.param.DeptParam;
import com.learn.util.BeanValidator;
import com.learn.util.IpUtil;
import com.learn.util.LevelUtil;
import org.apache.commons.collections.CollectionUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.Date;
import java.util.List;

@Service
public class SysDeptService {

    @Resource
    private SysDeptMapper sysDeptMapper;
    @Resource
    private SysUserMapper sysUserMapper;
    @Resource
    private SysLogService sysLogService;

    public void save(DeptParam param) {
        BeanValidator.check(param);
        if(checkExist(param.getParentId(), param.getName(), param.getId())) {
            throw new ParamException("同一层级下存在相同名称的部门");
        }
        SysDept dept = SysDept.builder().name(param.getName()).parentId(param.getParentId())
                .seq(param.getSeq()).remark(param.getRemark()).build();

        dept.setLevel(LevelUtil.calculateLevel(getLevel(param.getParentId()), param.getParentId()));
        dept.setOperator(RequestHolder.getCurrentUser().getUsername());
        dept.setOperateIp(IpUtil.getRemoteIp(RequestHolder.getCurrentRequest()));
        dept.setOperateTime(new Date());
        sysDeptMapper.insertSelective(dept);
        sysLogService.saveDeptLog(null, dept);
    }

    public void update(DeptParam param) {
        BeanValidator.check(param);
        if(checkExist(param.getParentId(), param.getName(), param.getId())) {
            throw new ParamException("同一层级下存在相同名称的部门");
        }
        SysDept before = sysDeptMapper.selectByPrimaryKey(param.getId());
        Preconditions.checkNotNull(before, "待更新的部门不存在");
        if(checkExist(param.getParentId(), param.getName(), param.getId())) {
            throw new ParamException("同一层级下存在相同名称的部门");
        }

        SysDept after = SysDept.builder().id(param.getId()).name(param.getName()).parentId(param.getParentId())
                .seq(param.getSeq()).remark(param.getRemark()).build();
        after.setLevel(LevelUtil.calculateLevel(getLevel(param.getParentId()), param.getParentId()));
        after.setOperator(RequestHolder.getCurrentUser().getUsername());
        after.setOperateIp(IpUtil.getRemoteIp(RequestHolder.getCurrentRequest()));
        after.setOperateTime(new Date());

        updateWithChild(before, after);
        sysLogService.saveDeptLog(before, after);
    }
    
}

package com.learn.service;

import com.google.common.base.Preconditions;
import com.learn.beans.PageQuery;
import com.learn.beans.PageResult;
import com.learn.common.RequestHolder;
import com.learn.dao.SysUserMapper;
import com.learn.exception.ParamException;
import com.learn.model.SysUser;
import com.learn.param.UserParam;
import com.learn.util.BeanValidator;
import com.learn.util.IpUtil;
import com.learn.util.MD5Util;
import com.learn.util.PasswordUtil;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.Date;
import java.util.List;

@Service
public class SysUserService {

    @Resource
    private SysUserMapper sysUserMapper;
    @Resource
    private SysLogService sysLogService;

    public void save(UserParam param) {
        BeanValidator.check(param);
        if(checkTelephoneExist(param.getTelephone(), param.getId())) {
            throw new ParamException("电话已被占用");
        }
        if(checkEmailExist(param.getMail(), param.getId())) {
            throw new ParamException("邮箱已被占用");
        }
        String password = PasswordUtil.randomPassword();
        //TODO:
        password = "12345678";
        String encryptedPassword = MD5Util.encrypt(password);
        SysUser user = SysUser.builder().username(param.getUsername()).telephone(param.getTelephone()).mail(param.getMail())
                .password(encryptedPassword).deptId(param.getDeptId()).status(param.getStatus()).remark(param.getRemark()).build();
        user.setOperator(RequestHolder.getCurrentUser().getUsername());
        user.setOperateIp(IpUtil.getRemoteIp(RequestHolder.getCurrentRequest()));
        user.setOperateTime(new Date());

        // TODO: sendEmail

        sysUserMapper.insertSelective(user);
        sysLogService.saveUserLog(null, user);
    }

    public void update(UserParam param) {
        BeanValidator.check(param);
        if(checkTelephoneExist(param.getTelephone(), param.getId())) {
            throw new ParamException("电话已被占用");
        }
        if(checkEmailExist(param.getMail(), param.getId())) {
            throw new ParamException("邮箱已被占用");
        }
        SysUser before = sysUserMapper.selectByPrimaryKey(param.getId());
        Preconditions.checkNotNull(before, "待更新的用户不存在");
        SysUser after = SysUser.builder().id(param.getId()).username(param.getUsername()).telephone(param.getTelephone()).mail(param.getMail())
                .deptId(param.getDeptId()).status(param.getStatus()).remark(param.getRemark()).build();
        after.setOperator(RequestHolder.getCurrentUser().getUsername());
        after.setOperateIp(IpUtil.getRemoteIp(RequestHolder.getCurrentRequest()));
        after.setOperateTime(new Date());
        sysUserMapper.updateByPrimaryKeySelective(after);
        sysLogService.saveUserLog(before, after);
    }
   
}