• Spring Boot 4 实现JwtToken验证(重点)&&实现后端API(重点)&&前端：实现注册与登录模块(略)

    JwtToken&&注册与登录

    不用认证，即不用ajax中headers配置项
登录+注册
.antMatchers("/user/account/token/","/user/account/register/").permitAll()

上面的跟前端没有什么联系
仅仅只是ajax时不用headers
前端具体的控制还在前端

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    1.实现JwtToken验证(重点)

    1.1添加依赖

    jjwt-api
    jjwt-impl
    jjwt-jackson

    <dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-api</artifactId>
    <version>0.11.2</version>
</dependency>
<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-impl</artifactId>
    <version>0.11.2</version>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-jackson</artifactId>
    <version>0.11.2</version>
    <scope>runtime</scope>
</dependency>

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    1.2 编写、修改相关类

    1.2.1实现 JwtUtil 类

    在 backend 目录下创建软件包 utils 并创建 JwtUtil 类。
    JwtUtil 类为jwt 工具类，用来创建、解析 jwt token。

    package com.kob.backend.utils;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.stereotype.Component;

import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;
import java.util.Date;
import java.util.UUID;

@Component
public class JwtUtil {
    public static final long JWT_TTL = 60 * 60 * 1000L * 24 * 14;  // 有效期14天
    public static final String JWT_KEY = "SDFGjhdsfalshdfHFdsjkdsfds121232131afasdfac";

    public static String getUUID() {
        return UUID.randomUUID().toString().replaceAll("-", "");
    }

    public static String createJWT(String subject) {
        JwtBuilder builder = getJwtBuilder(subject, null, getUUID());
        return builder.compact();
    }

    private static JwtBuilder getJwtBuilder(String subject, Long ttlMillis, String uuid) {
        SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.HS256;
        SecretKey secretKey = generalKey();
        long nowMillis = System.currentTimeMillis();
        Date now = new Date(nowMillis);
        if (ttlMillis == null) {
            ttlMillis = JwtUtil.JWT_TTL;
        }

        long expMillis = nowMillis + ttlMillis;
        Date expDate = new Date(expMillis);
        return Jwts.builder()
                .setId(uuid)
                .setSubject(subject)
                .setIssuer("sg")
                .setIssuedAt(now)
                .signWith(signatureAlgorithm, secretKey)
                .setExpiration(expDate);
    }

    public static SecretKey generalKey() {
        byte[] encodeKey = Base64.getDecoder().decode(JwtUtil.JWT_KEY);
        return new SecretKeySpec(encodeKey, 0, encodeKey.length, "HmacSHA256");
    }

    public static Claims parseJWT(String jwt) throws Exception {
        SecretKey secretKey = generalKey();
        return Jwts.parserBuilder()
                .setSigningKey(secretKey)
                .build()
                .parseClaimsJws(jwt)
                .getBody();
    }
}

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    1.2.2实现 JwtAuthenticationTokenFilter 类

    在 backend 的 config 目录下创建 config 软件包，并创建 JwtAuthenticationTokenFilter类。
    实现 JwtAuthenticationTokenFilter 类，用来验证 jwt token ，如果验证成功，则将 User 信息注入上下文中。

    package com.kob.backend.config.filter;


import com.kob.backend.mapper.UserMapper;
import com.kob.backend.pojo.User;
import com.kob.backend.service.impl.utils.UserDetailsImpl;
import com.kob.backend.utils.JwtUtil;
import com.sun.istack.internal.NotNull;
import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
    @Autowired
    private UserMapper userMapper;

    @Override
    protected void doFilterInternal(HttpServletRequest request, @NotNull HttpServletResponse response, @NotNull FilterChain filterChain) throws ServletException, IOException {
        String token = request.getHeader("Authorization");

        if (!StringUtils.hasText(token) || !token.startsWith("Bearer ")) {
            filterChain.doFilter(request, response);
            return;
        }

        token = token.substring(7);

        String userid;
        try {
            Claims claims = JwtUtil.parseJWT(token);
            userid = claims.getSubject();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

        User user = userMapper.selectById(Integer.parseInt(userid));

        if (user == null) {
            throw new RuntimeException("用户名未登录");
        }

        UserDetailsImpl loginUser = new UserDetailsImpl(user);
        UsernamePasswordAuthenticationToken authenticationToken =
                new UsernamePasswordAuthenticationToken(loginUser, null, null);

        SecurityContextHolder.getContext().setAuthentication(authenticationToken);

        filterChain.doFilter(request, response);
    }
}

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    1.2.3 配置config.SecurityConfig类

    放行登录、注册等接口。

    package com.kob.backend.config;

import com.kob.backend.config.filter.JwtAuthenticationTokenFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                //此处两个连接不需要认证，可以理解为不登陆就能访问的页面
                .antMatchers("/user/account/token/", "/user/account/register/").permitAll()
                .antMatchers(HttpMethod.OPTIONS).permitAll()
                .anyRequest().authenticated();

        http.addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
    }
}

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    2.实现后端API

    2.1 修改数据库

    在这里插入图片描述
    在这里插入图片描述

    2.2实现接口API(重点)

    在这里插入图片描述

    实现LoginService

    在这里插入图片描述

    package com.kob.backend.service.user.account;

import java.util.Map;

public interface LoginService {
    public Map<String, String> getToken(String username, String password);

}

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    在这里插入图片描述

    package com.kob.backend.service.impl.user.account;

import com.kob.backend.pojo.User;
import com.kob.backend.service.impl.utils.UserDetailsImpl;
import com.kob.backend.service.user.account.LoginService;
import com.kob.backend.utils.JwtUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.neo4j.Neo4jProperties;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    private AuthenticationManager authenticationManager;

    @Override
    public Map<String, String> getToken(String username, String password) {
        UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(username, password);

        Authentication authenticate = authenticationManager.authenticate(authenticationToken);
        UserDetailsImpl loginUser = (UserDetailsImpl) authenticate.getPrincipal();
        User user = loginUser.getUser();
        String jwt = JwtUtil.createJWT(user.getId().toString());

        Map<String, String> map = new HashMap<>();
        map.put("error_message", "success");
        map.put("token", jwt);

        return map;
    }
}

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    在这里插入图片描述

    package com.kob.backend.controller.user.account;

import com.kob.backend.service.user.account.LoginService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.Map;

@RestController
public class LoginController {

    @Autowired
    private LoginService loginService;

    @PostMapping("/user/account/token/")
    public Map<String, String> getToken(@RequestParam Map<String, String> map) {
        String username = map.get("username");
        String password = map.get("password");

        System.out.println(username + ' ' + password);
        return loginService.getToken(username, password);
    }
}

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    实现InfoService

    在这里插入图片描述

    package com.kob.backend.service.user.account;

import java.util.Map;

public interface InfoService {
    public Map<String, String> getInfo();
}

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    在这里插入图片描述

    package com.kob.backend.service.impl.user.account;

import com.kob.backend.pojo.User;
import com.kob.backend.service.impl.utils.UserDetailsImpl;
import com.kob.backend.service.user.account.InfoService;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
@Service
public class InfoServiceImpl implements InfoService {

    /**
     * 根据token返回用户信息
     * @return map存储的信息
     */
    @Override
    public Map<String, String> getInfo() {
        UsernamePasswordAuthenticationToken authentication = (UsernamePasswordAuthenticationToken) SecurityContextHolder.getContext().getAuthentication();

        UserDetailsImpl loginUser = (UserDetailsImpl) authentication.getPrincipal();
        User user = loginUser.getUser();

        Map<String, String> map = new HashMap<>();
        map.put("error_message", "success");
        map.put("id", user.getId().toString());
        map.put("username", user.getUsername());
        map.put("photo", user.getPhoto());
        return map;
    }
}

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    在这里插入图片描述

    package com.kob.backend.controller.user.account;

import com.kob.backend.service.user.account.InfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Map;

@RestController
public class InfoController {

    @Autowired
    private InfoService infoService;

    @GetMapping("/user/account/info/")
    public Map<String, String> getInfo() {
        return infoService.getInfo();
    }
}

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    实现RegisterService

    在这里插入图片描述

    package com.kob.backend.service.user.account;

import java.util.Map;

public interface RegisterService {
    public Map<String, String> register(String username, String password, String confirmedPassword);
}

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    在这里插入图片描述

    package com.kob.backend.service.impl.user.account;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.kob.backend.mapper.UserMapper;
import com.kob.backend.pojo.User;
import com.kob.backend.service.user.account.RegisterService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class RegisterServiceImpl implements RegisterService {

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private PasswordEncoder passwordEncoder;

    @Override
    public Map<String, String> register(String username, String password, String confirmedPassword) {
        Map<String, String> map = new HashMap<>();
        if (username == null) {
            map.put("error_message", "用户名不能为空");
            return map;
        }

        if (password == null || confirmedPassword == null) {
            map.put("error_message", "密码不能为空");
            return map;
        }
        //删除首尾的空白字符
        username = username.trim();
        if (username.length() == 0) {
            map.put("error_message", "用户名不能为空");
            return map;
        }

        if (password.length() == 0 || confirmedPassword.length() == 0) {
            map.put("error_message", "密码不能为空");
            return map;
        }

        if (username.length() > 100) {
            map.put("error_message", "用户名长度不能大于100");
            return map;
        }

        if (password.length() > 100 || confirmedPassword.length() > 100) {
            map.put("error_message", "密码不能大于100");
            return map;
        }

        if (!password.equals(confirmedPassword)) {
            map.put("error_message", "两次输入的密码不一致");
            return map;
        }

        //查询用户名是否重复
        QueryWrapper<User> queryWrapper = new QueryWrapper<User>();
        queryWrapper.eq("username", username);
        List<User> users = userMapper.selectList(queryWrapper);
        if (!users.isEmpty()) {
            map.put("error_message", "用户名已存在");
            return map;
        }

        // 添加一个新用户
        String encodedPassword = passwordEncoder.encode(password);
        //输入自己的图片地址
        String photo = "******************************";
        User user = new User(null, username, encodedPassword, photo);
        userMapper.insert(user);

        map.put("error_message", "success");
        return map;
    }
}

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    在这里插入图片描述

    package com.kob.backend.controller.user.account;

import com.kob.backend.service.user.account.RegisterService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.Map;

@RestController
public class RegisterController {

    @Autowired
    private RegisterService registerService;

    @PostMapping("/user/account/register/")
    public Map<String, String> register(@RequestParam Map<String, String> map) {
        String username = map.get("username");
        String password = map.get("password");
        String confirmedPassword = map.get("confirmedPassword");
        return registerService.register(username, password, confirmedPassword);
    }
}

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    前端调试

    在这里插入图片描述

    <template>
  <NavBar></NavBar>
  <router-view></router-view>
</template>

<script>

import NavBar from "@/components/NavBar.vue";
import "bootstrap/dist/css/bootstrap.min.css";
import "bootstrap/dist/js/bootstrap";
import $ from 'jquery'

export default {
  components:{
    NavBar
  },

  setup() {
    // 测试LoginService
    $.ajax({
      url: "http://127.0.0.1:8080/user/account/token/",
      type: "post",
      data: {
        username: 'syy',
        password: 'psyy',
      },
      success(resp) {
        console.log(resp);
      },
      error(resp) {
        console.log(resp); 
      }
    });
    // 测试InfoService
    $.ajax({
      url: "http://127.0.0.1:8080/user/account/info/",
      type: "get",
      headers: {
        Authorization: "Bearer " + "eyJhbGciOiJIUzI1NiJ9.eyJqdGkiOiI4MjliMjQzYjg4YmM0NjdjYmRkMDAwMmNiMzYwZDJiMyIsInN1YiI6IjEiLCJpc3MiOiJzZyIsImlhdCI6MTY1OTU3ODUyMiwiZXhwIjoxNjYwNzg4MTIyfQ.s5nd3RgtDKkPBDDm4P87ET8biZk8H79VMII1p_O9OsA",
      },
      success(resp) {
        console.log(resp);
      },
      error(resp) {
        console.log(resp);
      }
    });
    // 测试RegisterService
    $.ajax({
      url: "http://127.0.0.1:8080/user/account/register/",
      type: "post",
      data: {
        username: "hmy",
        password: "phmy",
        confirmedPassword: "phmy",
      },
      success(resp) {
        console.log(resp);
      },
      error(resp) {
        console.log(resp);
      }
    })
  }
}
</script>


<style>
body {
  background-image: url("./assets/images/background.png");
  background-size: cover;
}
</style>

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    在这里插入图片描述

    3. 实现前端的登陆、注册界面（略）

    3.1实现前端的页面授权功能—重定向到登录页面(重点)

    在这里插入图片描述
    router.index.js实现

    router.beforeEach((to, from, next) => {
  if (to.meta.requestAuth && !store.state.user.is_login) {
    next({name: "user_account_login"});
  }
  else {
    next();
  }
})

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    3.2实现登录界面的可持久化(重点)

    在这里插入图片描述

    let jwt_token = localStorage.getItem("jwt_token");
        if (jwt_token) {
            store.commit("updateToken",jwt_token);
            //判断是否合法的，就是从云端获取用户信息
            store.dispatch("getinfo",{
                success() {
                    router.push({name: "home"});
                },
                error() {

                }
            })
        }

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    在这里插入图片描述

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  • 原文地址：https://blog.csdn.net/qq_52384627/article/details/126397513