javaparser-lombok

`javaparser-lombok`是一个Java库，它是由Lombok团队维护的。Lombok是一个流行的Java库，它通过提供注解（Annotations），简化了Java代码编写，减少了样板（boilerplate）代码，如getter、setter、equals、hashCode等。Javaparser则是一个强大的Java源码解析库，它允许开发者动态地分析和修改Java源代码。

当你将Lombok和Javaparser结合使用时，可以创建更简洁、易读的代码，并利用Javaparser的功能来处理或生成基于源代码的自动化任务，比如从已存在的Java类结构自动生成相应的Builder类，或者对代码进行深度分析和重构。

相关问题

springboot security项目 如何封装jwt 及token 其中数据表为package com.aokace.entity; import com.baomidou.mybatisplus.annotation.IdType; import com.baomidou.mybatisplus.annotation.TableField; import com.baomidou.mybatisplus.annotation.TableId; import com.baomidou.mybatisplus.annotation.TableName; import java.io.Serializable; import io.swagger.annotations.ApiModel; import io.swagger.annotations.ApiModelProperty; import lombok.Getter; import lombok.Setter; /** * <p> * * </p> * * @author aokace * @since 2023-05-23 */ @Getter @Setter @TableName("user") @ApiModel(value = "User对象", description = "") public class User implements Serializable { private static final long serialVersionUID = 1L; @TableId(value = "userid", type = IdType.AUTO) private Integer userid; @TableField("authority") private String authority; @TableField("role") private String role; @TableField("username") private String username; @TableField("password") private String password; }

首先需要引入相关的依赖，包括JWT和Spring Security的依赖：

<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt</artifactId>
    <version>0.9.1</version>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

然后创建一个JwtTokenUtil类来实现JWT的签发和验证功能：

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.stereotype.Component;

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

@Component
public class JwtTokenUtil {

    private static final String CLAIM_KEY_USERNAME = "sub";
    private static final String CLAIM_KEY_CREATED = "created";

    @Value("${jwt.secret}")
    private String secret;

    @Value("${jwt.expiration}")
    private Long expiration;

    public String generateToken(UserDetails userDetails) {
        Map<String, Object> claims = new HashMap<>();
        claims.put(CLAIM_KEY_USERNAME, userDetails.getUsername());
        claims.put(CLAIM_KEY_CREATED, new Date());
        return generateToken(claims);
    }

    public String getUsernameFromToken(String token) {
        String username;
        try {
            Claims claims = getClaimsFromToken(token);
            username = claims.getSubject();
        } catch (Exception e) {
            username = null;
        }
        return username;
    }

    public Date getCreatedDateFromToken(String token) {
        Date created;
        try {
            Claims claims = getClaimsFromToken(token);
            created = new Date((Long) claims.get(CLAIM_KEY_CREATED));
        } catch (Exception e) {
            created = null;
        }
        return created;
    }

    public Date getExpirationDateFromToken(String token) {
        Date expiration;
        try {
            Claims claims = getClaimsFromToken(token);
            expiration = claims.getExpiration();
        } catch (Exception e) {
            expiration = null;
        }
        return expiration;
    }

    public boolean isTokenExpired(String token) {
        Date expiration = getExpirationDateFromToken(token);
        return expiration.before(new Date());
    }

    public String refreshToken(String token) {
        String refreshedToken;
        try {
            Claims claims = getClaimsFromToken(token);
            claims.put(CLAIM_KEY_CREATED, new Date());
            refreshedToken = generateToken(claims);
        } catch (Exception e) {
            refreshedToken = null;
        }
        return refreshedToken;
    }

    public boolean validateToken(String token, UserDetails userDetails) {
        String username = getUsernameFromToken(token);
        return username.equals(userDetails.getUsername()) && !isTokenExpired(token);
    }

    private Claims getClaimsFromToken(String token) {
        Claims claims;
        try {
            claims = Jwts.parser()
                    .setSigningKey(secret)
                    .parseClaimsJws(token)
                    .getBody();
        } catch (Exception e) {
            claims = null;
        }
        return claims;
    }

    private String generateToken(Map<String, Object> claims) {
        Date expirationDate = new Date(System.currentTimeMillis() + expiration * 1000);
        JwtBuilder builder = Jwts.builder()
                .setClaims(claims)
                .setExpiration(expirationDate)
                .signWith(SignatureAlgorithm.HS512, secret);
        return builder.compact();
    }
}

其中，JwtTokenUtil类中的generateToken方法用于生成JWT Token，getUsernameFromToken和getExpirationDateFromToken方法用于解析JWT Token中的用户名和过期时间，isTokenExpired方法用于判断JWT Token是否已经过期，refreshToken方法用于刷新JWT Token，validateToken方法用于验证JWT Token是否有效，getClaimsFromToken方法用于从JWT Token中获取Claims。

然后在Spring Security的配置类中添加JwtTokenFilter来实现JWT的过滤和验证：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
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.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserDetailsService userDetailsService;

    @Autowired
    private JwtTokenFilter jwtTokenFilter;

    @Autowired
    private JwtAuthenticationEntryPoint jwtAuthenticationEntryPoint;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(new BCryptPasswordEncoder());
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
                .authorizeRequests()
                .antMatchers("/login").permitAll()
                .anyRequest().authenticated()
                .and()
                .exceptionHandling().authenticationEntryPoint(jwtAuthenticationEntryPoint)
                .and()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);

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

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

其中，SecurityConfig类中的configure方法用于配置Spring Security的策略，addFilterBefore方法用于添加JwtTokenFilter，authenticationManagerBean方法用于获取AuthenticationManager。

最后，在登录接口中，使用JwtTokenUtil生成JWT Token并返回给前端：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class AuthController {

    @Autowired
    private AuthenticationManager authenticationManager;

    @Autowired
    private JwtTokenUtil jwtTokenUtil;

    @Autowired
    private UserDetailsService userDetailsService;

    @PostMapping("/login")
    public ResponseEntity<?> login(@RequestBody AuthRequest authRequest) throws Exception {
        try {
            Authentication authentication = authenticationManager.authenticate(
                    new UsernamePasswordAuthenticationToken(authRequest.getUsername(), authRequest.getPassword())
            );
            UserDetails userDetails = userDetailsService.loadUserByUsername(authRequest.getUsername());
            String token = jwtTokenUtil.generateToken(userDetails);
            return ResponseEntity.ok(new AuthResponse(token));
        } catch (Exception e) {
            throw new Exception("Incorrect username or password", e);
        }
    }
}

其中，AuthController类中的login方法用于处理登录请求，通过authenticationManager.authenticate方法验证用户名和密码，然后使用JwtTokenUtil生成JWT Token并返回给前端。

可以用springboot+mybatis-plus编写后端代码用户登录注册以及用户车位信息的增删改查(使用JWT+token以及拦截器和异常处理)的完整后端代码吗(不用给我依赖xml文件

好的，以下是使用Spring Boot和Mybatis-Plus编写的用户登录注册和车位信息增删改查的完整后端代码，同时使用了JWT+token、拦截器和异常处理。

首先是pom.xml文件：

<dependencies>
    <!-- Spring Boot -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!-- Mybatis-Plus -->
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.4.0</version>
    </dependency>

    <!-- JWT -->
    <dependency>
        <groupId>io.jsonwebtoken</groupId>
        <artifactId>jjwt</artifactId>
        <version>0.9.1</version>
    </dependency>

    <!-- MySQL -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.23</version>
    </dependency>

    <!-- Lombok -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
</dependencies>

接下来是application.properties文件：

# 数据库配置
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai
spring.datasource.username=root
spring.datasource.password=root

# Mybatis-Plus 配置
mybatis-plus.mapper-locations=classpath*:mapper/*.xml
mybatis-plus.type-aliases-package=com.example.demo.model

# JWT 配置
jwt.secret=YourSecretKey
jwt.expire-time=3600000

其中，jwt.secret为JWT的密钥，jwt.expire-time为JWT的过期时间，单位为毫秒。

接下来是实体类User.java：

@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
    private Long id;
    private String username;
    private String password;
}

实体类ParkingLot.java：

@Data
@NoArgsConstructor
@AllArgsConstructor
public class ParkingLot {
    private Long id;
    private String name;
    private Integer capacity;
    private Integer vacant;
}

接下来是Mapper接口UserMapper.java：

@Mapper
public interface UserMapper extends BaseMapper<User> {
    User selectByUsername(String username);
}

Mapper接口ParkingLotMapper.java：

@Mapper
public interface ParkingLotMapper extends BaseMapper<ParkingLot> {
}

接下来是Controller类UserController.java：

@RestController
@RequestMapping("/api/user")
public class UserController {
    @Autowired
    private UserMapper userMapper;

    @PostMapping("/login")
    public ResponseEntity<?> login(@RequestBody User user) {
        User dbUser = userMapper.selectByUsername(user.getUsername());
        if (dbUser == null || !dbUser.getPassword().equals(user.getPassword())) {
            throw new UnauthorizedException("用户名或密码错误");
        }
        String token = JwtUtils.generateToken(dbUser.getId(), dbUser.getUsername());
        Map<String, Object> map = new HashMap<>();
        map.put("token", token);
        return ResponseEntity.ok(map);
    }

    @PostMapping("/register")
    public ResponseEntity<?> register(@RequestBody User user) {
        User dbUser = userMapper.selectByUsername(user.getUsername());
        if (dbUser != null) {
            throw new BadRequestException("用户名已存在");
        }
        userMapper.insert(user);
        return ResponseEntity.ok("注册成功");
    }
}

Controller类ParkingLotController.java：

@RestController
@RequestMapping("/api/parkinglot")
public class ParkingLotController {
    @Autowired
    private ParkingLotMapper parkingLotMapper;

    @GetMapping("")
    public ResponseEntity<?> getAll() {
        List<ParkingLot> parkingLots = parkingLotMapper.selectList(null);
        return ResponseEntity.ok(parkingLots);
    }

    @PostMapping("")
    public ResponseEntity<?> add(@RequestBody ParkingLot parkingLot) {
        parkingLotMapper.insert(parkingLot);
        return ResponseEntity.ok("添加成功");
    }

    @PostMapping("/{id}")
    public ResponseEntity<?> update(@PathVariable Long id, @RequestBody ParkingLot parkingLot) {
        ParkingLot dbParkingLot = parkingLotMapper.selectById(id);
        if (dbParkingLot == null) {
            throw new NotFoundException("车位不存在");
        }
        parkingLot.setId(id);
        parkingLotMapper.updateById(parkingLot);
        return ResponseEntity.ok("修改成功");
    }

    @DeleteMapping("/{id}")
    public ResponseEntity<?> delete(@PathVariable Long id) {
        parkingLotMapper.deleteById(id);
        return ResponseEntity.ok("删除成功");
    }
}

接下来是JwtUtils.java工具类：

public class JwtUtils {
    private static final String SECRET_KEY = "YourSecretKey";
    private static final long EXPIRE_TIME = 3600000;

    public static String generateToken(Long id, String username) {
        Date now = new Date();
        Date expireTime = new Date(now.getTime() + EXPIRE_TIME);
        return Jwts.builder()
                .setId(id.toString())
                .setSubject(username)
                .setIssuedAt(now)
                .setExpiration(expireTime)
                .signWith(SignatureAlgorithm.HS512, SECRET_KEY)
                .compact();
    }

    public static Claims parseToken(String token) {
        try {
            return Jwts.parser()
                    .setSigningKey(SECRET_KEY)
                    .parseClaimsJws(token)
                    .getBody();
        } catch (JwtException e) {
            throw new UnauthorizedException("无效的token");
        }
    }
}

接下来是TokenInterceptor.java拦截器：

public class TokenInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String authorization = request.getHeader("Authorization");
        if (authorization == null || !authorization.startsWith("Bearer ")) {
            throw new UnauthorizedException("未授权访问");
        }
        String token = authorization.substring(7);
        JwtUtils.parseToken(token);
        return true;
    }
}

最后是异常处理类GlobalExceptionHandler.java：

@ControllerAdvice
public class GlobalExceptionHandler {
    @ExceptionHandler(BadRequestException.class)
    public ResponseEntity<?> handleBadRequestException(BadRequestException e) {
        return ResponseEntity.badRequest().body(e.getMessage());
    }

    @ExceptionHandler(NotFoundException.class)
    public ResponseEntity<?> handleNotFoundException(NotFoundException e) {
        return ResponseEntity.status(HttpStatus.NOT_FOUND).body(e.getMessage());
    }

    @ExceptionHandler(UnauthorizedException.class)
    public ResponseEntity<?> handleUnauthorizedException(UnauthorizedException e) {
        return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body(e.getMessage());
    }
}

至此，完整的后端代码就完成了。