超详细讲解Java秒杀项目用户验证模块的实现
短信预约 -IT技能 免费直播动态提醒
接着上期内容超详细讲解Java秒杀项目登陆模块的实现
一、用户验证
未登录的用户不能进入首页
根据上期内容，我未登录也能进入首页：
1、在方法内添加请求与反应
①、IUserService
package com.example.seckill.service;
import com.example.seckill.pojo.User;
import com.baomidou.mybatisplus.extension.service.IService;
import com.example.seckill.util.response.ResponseResult;
import com.example.seckill.vo.UserVo;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public interface IUserService extends IService<User> {
ResponseResult<?> findByAccount(UserVo userVo, HttpServletRequest request, HttpServletResponse response);
}②、UserServiceImpl
③、UserController
package com.example.seckill.controller;
import com.example.seckill.service.IUserService;
import com.example.seckill.util.response.ResponseResult;
import com.example.seckill.vo.UserVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.validation.Valid;
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private IUserService userService;
// 用户登录
@RequestMapping("/login")
public ResponseResult<?> login(@Valid UserVo userVo, HttpServletRequest request, HttpServletResponse response){
// 调用service的登录验证
return userService.findByAccount(userVo,request,response);
}
}2、cookie操作的封装
package com.example.seckill.util;
import lombok.extern.slf4j.Slf4j;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
@Slf4j
public class CookieUtils {
public static String getCookieValue(HttpServletRequest request, String cookieName) {
return getCookieValue(request, cookieName, false);
}
public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) {
Cookie[] cookieList = request.getCookies();
if (cookieList == null || cookieName == null) {
return null;
}
String retValue = null;
try {
for (int i = 0; i < cookieList.length; i++) {
if (cookieList[i].getName().equals(cookieName)) {
if (isDecoder) {
retValue = URLDecoder.decode(cookieList[i].getValue(), "UTF-8");
} else {
retValue = cookieList[i].getValue();
}
break;
}
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return retValue;
}
public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) {
Cookie[] cookieList = request.getCookies();
if (cookieList == null || cookieName == null) {
return null;
}
String retValue = null;
try {
for (int i = 0; i < cookieList.length; i++) {
if (cookieList[i].getName().equals(cookieName)) {
retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);
break;
}
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return retValue;
}
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue) {
setCookie(request, response, cookieName, cookieValue, -1);
}
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage) {
setCookie(request, response, cookieName, cookieValue, cookieMaxage, false);
}
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
String cookieValue, boolean isEncode) {
setCookie(request, response, cookieName, cookieValue, -1, isEncode);
}
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {
doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);
}
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
String cookieValue, int cookieMaxage, String encodeString) {
doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);
}
public static void deleteCookie(HttpServletRequest request, HttpServletResponse response,
String cookieName) {
doSetCookie(request, response, cookieName, null, -1, false);
}
private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {
try {
if (cookieValue == null) {
cookieValue = "";
} else if (isEncode) {
cookieValue = URLEncoder.encode(cookieValue, "utf-8");
}
Cookie cookie = new Cookie(cookieName, cookieValue);
if (cookieMaxage > 0)
cookie.setMaxAge(cookieMaxage);
if (null != request) {// 设置域名的cookie
String domainName = getDomainName(request);
log.info("========== domainName: {} ==========", domainName);
if (!"localhost".equals(domainName)) {
cookie.setDomain(domainName);
}
}
cookie.setPath("/");
response.addCookie(cookie);
} catch (Exception e) {
e.printStackTrace();
}
}
private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,
String cookieName, String cookieValue, int cookieMaxage, String encodeString) {
try {
if (cookieValue == null) {
cookieValue = "";
} else {
cookieValue = URLEncoder.encode(cookieValue, encodeString);
}
Cookie cookie = new Cookie(cookieName, cookieValue);
if (cookieMaxage > 0)
cookie.setMaxAge(cookieMaxage);
if (null != request) {// 设置域名的cookie
String domainName = getDomainName(request);
log.info("========== domainName: {} ==========", domainName);
if (!"localhost".equals(domainName)) {
cookie.setDomain(domainName);
}
}
cookie.setPath("/");
response.addCookie(cookie);
} catch (Exception e) {
e.printStackTrace();
}
}
private static final String getDomainName(HttpServletRequest request) {
String domainName = null;
String serverName = request.getRequestURL().toString();
if (serverName == null || serverName.equals("")) {
domainName = "";
} else {
serverName = serverName.toLowerCase();
serverName = serverName.substring(7);
final int end = serverName.indexOf("/");
serverName = serverName.substring(0, end);
if (serverName.indexOf(":") > 0) {
String[] ary = serverName.split("\\:");
serverName = ary[0];
}
final String[] domains = serverName.split("\\.");
int len = domains.length;
if (len > 3 && !isIp(serverName)) {
// www.xxx.com.cn
domainName = "." + domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];
} else if (len <= 3 && len > 1) {
// xxx.com or xxx.cn
domainName = "." + domains[len - 2] + "." + domains[len - 1];
} else {
domainName = serverName;
}
}
return domainName;
}
public static String trimSpaces(String IP) {//去掉IP字符串前后所有的空格
while (IP.startsWith(" ")) {
IP = IP.substring(1, IP.length()).trim();
}
while (IP.endsWith(" ")) {
IP = IP.substring(0, IP.length() - 1).trim();
}
return IP;
}
public static boolean isIp(String IP) {//判断是否是一个IP
boolean b = false;
IP = trimSpaces(IP);
if (IP.matches("\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}")) {
String s[] = IP.split("\\.");
if (Integer.parseInt(s[0]) < 255)
if (Integer.parseInt(s[1]) < 255)
if (Integer.parseInt(s[2]) < 255)
if (Integer.parseInt(s[3]) < 255)
b = true;
}
return b;
}
}3、UserServiceImpl
// 最初版本（session），但Session内数据是服务器共用的
// 所有不让名字重复
String ticket=UUID.randomUUID().toString().replace("-","");
request.getSession().setAttribute(ticket,user);
// 将生成的ticket给用户，用户如何验证？使用cookie
CookieUtils.setCookie(request,response,"ticket",ticket);点击登录时，查看应用程序，cookie内有值
4、跳转界面PathController
跳转方法：
// 跳所有二级页面
@RequestMapping("/{dir}/{path}")
public String toPath(@PathVariable("dir") String dir, @PathVariable("path") String path, HttpServletRequest request){
String ticket= CookieUtils.getCookieValue(request,"ticket");
if(ticket==null){
throw new BusinessException(ResponseResultCode.TICKET_ERROR);
}
// 去session中取到ticket对应的用户，判断是否有值
Object obj=request.getSession().getAttribute(ticket);
if(obj==null){
throw new BusinessException(ResponseResultCode.TICKET_ERROR);
}
return dir+"/"+path;
}未登录时访问主界面失败：只有登录成功后才能访问
二、全局session
根据以上操作完后，session仍然有问题，，session只能在当前某一台服务器中，
需使用第三者完成数据共享，此处使用redis方式，将需要缓存的数据丢到缓存内
1、导入依赖
此处全局session是spring session中的一个，spring session就是spring中的一个文件
<!--commons-pool2-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
</dependency>
<!--spring-session将session借助于第三方存储（redis/mongodb等等），默认redis-->
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-data-redis</artifactId>
</dependency>2、配置yml文件redis
spring:
redis:
host: 47.100.191.44
password: xiaoli_redis
database: 0
port: 6379
3、开启虚拟机
现在开启虚拟机
三、自定义redis实现功能
完成全局session的作用
1、新建RedisConfig文件
用于操作redis
package com.example.seckill.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
@Configuration
public class RedisConfig {
public RedisTemplate redisTemplate(RedisConnectionFactory factory){
// 新建一个
RedisTemplate redisTemplate=new RedisTemplate();
//设置一下使用连接工厂
redisTemplate.setConnectionFactory(factory);
// 额外设置
// 将key序列化操作，转化为string
redisTemplate.setKeySerializer(new StringRedisSerializer());
// value被转化为json
redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
// 额外设置（hash 就是 map集合）
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
// 让设置生效
redisTemplate.afterPropertiesSet();
return redisTemplate;
}
}2、实现全局session
①、写个帮助类，用于调用
IRedisService接口：
package com.example.seckill.service;
import com.example.seckill.pojo.User;
public interface IRedisService {
void putUserByTicket(String ticket, User user);
User getUserByTicket(String ticket);
}实现接口：
package com.example.seckill.service.impl;
import com.example.seckill.pojo.User;
import com.example.seckill.service.IRedisService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import java.util.concurrent.TimeUnit;
@Service
public class RedisServiceImpl implements IRedisService {
@Autowired
private RedisTemplate redisTemplate;
@Override
public void putUserByTicket(String ticket, User user) {
redisTemplate.opsForValue().set("user:"+ticket,user,2L, TimeUnit.HOURS);
}
@Override
public User getUserByTicket(String ticket) {
Object obj=redisTemplate.opsForValue().get("user:"+ticket);
if(obj==null || !(obj instanceof User)){
return null;
}
return (User)obj;
}
}②、redisService到缓存中拿元素
@Autowired
private IRedisService redisService;
// 跳所有二级页面
@RequestMapping("/{dir}/{path}")
public String toPath(@PathVariable("dir") String dir, @PathVariable("path") String path, HttpServletRequest request){
// 获取用户的ticket
String ticket= CookieUtils.getCookieValue(request,"ticket");
if(ticket==null){
throw new BusinessException(ResponseResultCode.TICKET_ERROR);
}
// 去session中取到ticket对应的用户，判断是否有值
// Object obj=request.getSession().getAttribute(ticket);
// 去缓存中拿元素
User user=redisService.getUserByTicket(ticket);
if(user==null){
throw new BusinessException(ResponseResultCode.TICKET_ERROR);
}
return dir+"/"+path;
}③、放到缓存中
UserServiceImpl：
// 放到缓存中去
redisService.putUserByTicket(ticket,user);
package com.example.seckill.service.impl;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.example.seckill.exception.BusinessException;
import com.example.seckill.pojo.User;
import com.example.seckill.mapper.UserMapper;
import com.example.seckill.service.IRedisService;
import com.example.seckill.service.IUserService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.seckill.util.CookieUtils;
import com.example.seckill.util.MD5Utils;
import com.example.seckill.util.ValidatorUtils;
import com.example.seckill.util.response.ResponseResult;
import com.example.seckill.util.response.ResponseResultCode;
import com.example.seckill.vo.UserVo;
import com.sun.deploy.nativesandbox.comm.Request;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestBody;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.websocket.Session;
import java.util.Date;
import java.util.UUID;
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
@Autowired
private IRedisService redisService;
@Override
public ResponseResult<?> findByAccount(UserVo userVo, HttpServletRequest request, HttpServletResponse response) {
// 先判断信息是否符合（账号是否是手机号码，密码是不是空）
// if(!ValidatorUtils.isMobile(userVo.getMobile())){
// throw new BusinessException(ResponseResultCode.USER_ACCOUNT_NOT_MOBLIE);
// }
// if(StringUtils.isBlank(userVo.getPassword())){
// throw new BusinessException(ResponseResultCode.USER_PASSWORD_NOT_MATCH);
// }
// 再去数据库查出对应的用户（mobile）
User user=this.getOne(new QueryWrapper<User>().eq("id",userVo.getMobile()));
if(user==null){
throw new BusinessException(ResponseResultCode.USER_ACCOUNT_NOT_FIND);
}
// 比较密码
// 二重加密（前端->后端，后端->数据库）
String salt=user.getSalt();
// 将前台的加密密码和后端的盐再次进行加密
String newPassword=MD5Utils.formPassToDbPass(userVo.getPassword(),salt);
if(!newPassword.equals(user.getPassword())){
throw new BusinessException(ResponseResultCode.USER_PASSWORD_NOT_MATCH);
}
// 修改最后的登录时间
this.update(new UpdateWrapper<User>().eq("id",userVo.getMobile()).set("last_login_date",new Date()).setSql("login_count=login_count+1"));
// 最初版本（session），但Session内数据是服务器共用的
// 所有不让名字重复
String ticket=UUID.randomUUID().toString().replace("-","");
// 放到全局或者当服务器的session
// request.getSession().setAttribute(ticket,user);
// 放到缓存中去
redisService.putUserByTicket(ticket,user);
// 将生成的ticket给用户，用户如何验证？使用cookie
CookieUtils.setCookie(request,response,"ticket",ticket);
return ResponseResult.success();
}
}④、LocalDateTime无法构造实例
LocalDateTime是Java8推荐使用的时间类，我此处无法转化，需要去配置解析器，我就改变实体类中的LocalDateTime改为时间戳Timestamp
四、使用参数解析器
在controller类中方法内加上User实体类参数，查询出用户，自动将信息赋值
1、新建WebConfig文件
package com.example.seckill.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import java.util.List;
@Configuration
//打开mvc的功能
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {
@Autowired
private UserArgumentResolvers userArgumentResolvers;
@Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
resolvers.add(userArgumentResolvers);
}
// 使静态资源仍然可使用
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
//静态资源访问映射 映射路径 -> 本地资源路径
registry.addResourceHandler("/static/**")
.addResourceLocations("classpath:/static/");
}
}2、定义参数解析器
UserArgumentResolvers ：
package com.example.seckill.config;
import com.example.seckill.exception.BusinessException;
import com.example.seckill.pojo.User;
import com.example.seckill.service.IRedisService;
import com.example.seckill.util.CookieUtils;
import com.example.seckill.util.response.ResponseResultCode;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.MethodParameter;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;
import javax.servlet.http.HttpServletRequest;
@Component
public class UserArgumentResolvers implements HandlerMethodArgumentResolver {
@Autowired
private IRedisService redisService;
// supportsParameter方法判断参数是否需要解析，决定了resolveArgument方法是否运行
@Override
public boolean supportsParameter(MethodParameter methodParameter) {
return methodParameter.getParameterType() == User.class;
}
// 解析参数
@Override
public Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception {
// 参数解析User,因为很多地方需要做登录验证
HttpServletRequest request=(HttpServletRequest) nativeWebRequest.getNativeRequest();
// 获取用户的ticket
String ticket= CookieUtils.getCookieValue(request,"ticket");
if(ticket==null){
throw new BusinessException(ResponseResultCode.TICKET_ERROR);
}
// 去session中取到ticket对应的用户，判断是否有值
// Object obj=request.getSession().getAttribute(ticket);
// 去缓存中拿元素
User user=redisService.getUserByTicket(ticket);
if(user==null){
throw new BusinessException(ResponseResultCode.TICKET_ERROR);
}
return user;//经过了参数解析后，参数会变成你这个地方返回的值
}
}3、PathController
package com.example.seckill.controller;
import com.example.seckill.exception.BusinessException;
import com.example.seckill.pojo.User;
import com.example.seckill.service.IRedisService;
import com.example.seckill.util.CookieUtils;
import com.example.seckill.util.response.ResponseResultCode;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
@Controller
public class PathController {
// 登录跳首页
@RequestMapping("/")
public String toPath(){
return "login";
}
// 跳所有二级页面
@RequestMapping("/{dir}/{path}")
public String toPath(@PathVariable("dir") String dir, @PathVariable("path") String path, User user){
return dir+"/"+path;
}
}4、访问主界面得到相关信息：
本期内容结束~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
到此这篇关于超详细讲解Java秒杀项目用户验证模块的实现的文章就介绍到这了,更多相关Java 用户验证内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！
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