黑马点评3：基于Redis实现共享session登录
在之前基础上，登录流程的变化：
保存用户信息数据类型：
最终：
修改代码：
1. 发送验证码：
src/main/java/com/hmdp/service/impl/UserServiceImpl.java
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
@Resource
private StringRedisTemplate stringRedisTemplate;
@Override
public Result sendCode(String phone, HttpSession session) {
...
// 4.保存验证码到 Redis
stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone, code, LOGIN_CODE_TTL, TimeUnit.MINUTES);//key,value,验证码时间限制 这些常量在RedisConstants类中定义
/
}
2. 短信登录和注册
@Override
public Result login(LoginFormDTO loginForm, HttpSession session) {
// 1.校验手机号
String phone = loginForm.getPhone();
if (RegexUtils.isPhoneInvalid(phone)) {
// 2.如果不符合，返回错误信息
return Result.fail("手机号格式错误！");
}
// 3.从redis获取验证码并校验
String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
String code = loginForm.getCode();
if (cacheCode == null || !cacheCode.equals(code)) {
// 不一致，报错
return Result.fail("验证码错误");
}
// 4.一致，根据手机号查询用户 select * from tb_user where phone = ?
User user = query().eq("phone", phone).one();
// 5.判断用户是否存在
if (user == null) {
// 6.不存在，创建新用户并保存
user = createUserWithPhone(phone);
}
// 7.保存用户信息到 redis中
// 7.1.随机生成token，作为登录令牌
String token = UUID.randomUUID().toString(true);
// 7.2.将User对象转为HashMap存储
UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
Map<String, Object> userMap = BeanUtil.beanToMap(userDTO, new HashMap<>(),
CopyOptions.create()
.setIgnoreNullValue(true)
.setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));
// 7.3.存储
String tokenKey = LOGIN_USER_KEY + token;
stringRedisTemplate.opsForHash().putAll(tokenKey, userMap);
// 7.4.设置token有效期
stringRedisTemplate.expire(tokenKey, LOGIN_USER_TTL, TimeUnit.MINUTES);
// 8.返回token
return Result.ok(token);
}
3. 拦截器
src/main/java/com/hmdp/config/MvcConfig.java
@Configuration
public class MvcConfig implements WebMvcConfigurer {
@Resource
private StringRedisTemplate stringRedisTemplate;
@Override
public void addInterceptors(InterceptorRegistry registry) {//添加拦截器
// 登录拦截器
registry.addInterceptor(new LoginInterceptor(stringRedisTemplate))
.excludePathPatterns(//排除不需要拦截的路径
"/shop/**",
"/voucher/**",
"/shop-type/**",
"/upload/**",
"/blog/hot",
"/user/code",
"/user/login"
).order(1);
// token刷新的拦截器
registry.addInterceptor(new RefreshTokenInterceptor(stringRedisTemplate));
}
}
src/main/java/com/hmdp/utils/LoginInterceptor.java
public class LoginInterceptor implements HandlerInterceptor {
private StringRedisTemplate stringRedisTemplate;
public LoginInterceptor(StringRedisTemplate stringRedisTemplate){
this.stringRedisTemplate = stringRedisTemplate;
}
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
// 1. 获取请求头中的token
String token request.getHeader("authorization");
if (StrUtil.isBlank(token)){
// 不存在，拦截，返回401状态码
response.setStatus(401);
return false;
}
// 2. 基于token获取Redis中的用户
String key = RedisConstants.LOGIN_USER_KEY+token;
Map<Object,Object> userMap = stringRedisTemplate.opsForHash().entries(key);
// 3. 判断用户是否存在
if (userMap.isEmpty()) {
// 4. 不存在，拦截，返回401状态码
response.setStatus(401);
return false;
}
// 5. 将查询到的Hash数据转为UserDTO对象
UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap,new UserDTO(),false);
// 6. 存在，保存用户信息到ThreadLocal
UserHolder.saveUser(userDTO);
// 7. 刷新token有效期
stringRedisTemplate.expire(key,RedisConstants.LOGIN_USER_TLL,TimeUnit.MINUTES);
// 8. 放行
return true;
}
}
4. 拦截器的优化
src/main/java/com/hmdp/utils/RefreshTokenInterceptor.java
public class RefreshTokenInterceptor implements HandlerInterceptor {
private StringRedisTemplate stringRedisTemplate;
public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
this.stringRedisTemplate = stringRedisTemplate;
}
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
// 1.获取请求头中的token
String token = request.getHeader("authorization");
if (StrUtil.isBlank(token)) {
return true;
}
// 2.基于TOKEN获取redis中的用户
String key = LOGIN_USER_KEY + token;
Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(key);
// 3.判断用户是否存在
if (userMap.isEmpty()) {
return true;
}
// 5.将查询到的hash数据转为UserDTO
UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
// 6.存在，保存用户信息到 ThreadLocal
UserHolder.saveUser(userDTO);
// 7.刷新token有效期
stringRedisTemplate.expire(key, LOGIN_USER_TTL, TimeUnit.MINUTES);
// 8.放行
return true;
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
// 移除用户
UserHolder.removeUser();
}
}
src/main/java/com/hmdp/utils/LoginInterceptor.java
public class LoginInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
// 1.判断是否需要拦截（ThreadLocal中是否有用户）
if (UserHolder.getUser() == null) {
// 没有，需要拦截，设置状态码
response.setStatus(401);
// 拦截
return false;
}
// 有用户，则放行
return true;
}
}
src/main/java/com/hmdp/config/MvcConfig.java
@Configuration
public class MvcConfig implements WebMvcConfigurer {
@Resource
private StringRedisTemplate stringRedisTemplate;
@Override
public void addInterceptors(InterceptorRegistry registry) {//添加拦截器
// 登录拦截器
registry.addInterceptor(new LoginInterceptor())
.excludePathPatterns(//排除不需要拦截的路径
"/shop/**",
"/voucher/**",
"/shop-type/**",
"/upload/**",
"/blog/hot",
"/user/code",
"/user/login"
).order(1);
// token刷新的拦截器
registry.addInterceptor(new RefreshTokenInterceptor(stringRedisTemplate)).addPathPatterns("/**").order(0);
}
}
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