springboot+jwt+shiro+redis例子

可以的，我可以为您提供一个基于Spring Boot、JWT、Shiro和Redis的例子。这个例子将演示如何使用这些技术实现用户认证和授权，并且将用户的状态存储在Redis中。

首先，您需要创建一个Spring Boot项目并添加所需的依赖。

在pom.xml文件中添加以下依赖：

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

    <!-- Shiro -->
    <dependency>
        <groupId>org.apache.shiro</groupId>
        <artifactId>shiro-spring-boot-web-starter</artifactId>
        <version>1.7.1</version>
    </dependency>

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

    <!-- Redis -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>
</dependencies>

接下来，创建一个名为`JwtUtils`的JWT工具类，用于生成和验证JWT令牌。您可以参考以下代码：

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import java.util.Date;

@Component
public class JwtUtils {

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

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

    @PostConstruct
    public void init() {
        secret = Base64.getEncoder().encodeToString(secret.getBytes());
    }

    public String generateToken(String username) {
        Date now = new Date();
        Date expiryDate = new Date(now.getTime() + expiration * 1000);

        return Jwts.builder()
                .setSubject(username)
                .setIssuedAt(now)
                .setExpiration(expiryDate)
                .signWith(SignatureAlgorithm.HS512, secret)
                .compact();
    }

    public String getUsernameFromToken(String token) {
        Claims claims = Jwts.parser()
                .setSigningKey(secret)
                .parseClaimsJws(token)
                .getBody();

        return claims.getSubject();
    }

    public boolean validateToken(String token) {
        try {
            Jwts.parser().setSigningKey(secret).parseClaimsJws(token);
            return true;
        } catch (Exception e) {
            return false;
        }
    }
}

然后，创建一个名为`RedisUtils`的Redis工具类，用于操作Redis。您可以参考以下代码：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;

import java.util.concurrent.TimeUnit;

@Component
public class RedisUtils {

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

    public void set(String key, Object value, long expiration) {
        redisTemplate.opsForValue().set(key, value, expiration, TimeUnit.SECONDS);
    }

    public Object get(String key) {
        return redisTemplate.opsForValue().get(key);
    }

    public void delete(String key) {
        redisTemplate.delete(key);
    }

    public boolean hasKey(String key) {
        return redisTemplate.hasKey(key);
    }
}

接下来，创建一个名为`JwtRealm`的Shiro Realm，用于验证JWT令牌和授权。您可以参考以下代码：

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;

public class JwtRealm extends AuthorizingRealm {

    @Autowired
    private JwtUtils jwtUtils;

    @Autowired
    private RedisUtils redisUtils;

    @Override
    public boolean supports(AuthenticationToken token) {
        return token instanceof JwtToken;
    }

    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        // TODO: 实现授权逻辑
    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        JwtToken jwtToken = (JwtToken) token;
        String username = jwtUtils.getUsernameFromToken(jwtToken.getToken());

        if (username == null || !jwtUtils.validateToken(jwtToken.getToken())) {
            throw new AuthenticationException("无效的令牌");
        }

        // TODO: 查询用户信息并返回认证信息

        return new SimpleAuthenticationInfo(username, jwtToken.getToken(), getName());
    }
}

最后，创建一个名为`JwtToken`的Shiro Token，用于封装JWT令牌。您可以参考以下代码：

import org.apache.shiro.authc.AuthenticationToken;

public class JwtToken implements AuthenticationToken {

    private String token;

    public JwtToken(String token) {
        this.token = token;
    }

    @Override
    public Object getPrincipal() {
        return token;
    }

    @Override
    public Object getCredentials() {
        return token;
    }
}

以上是一个基于Spring Boot、JWT、Shiro和Redis的例子。您可以根据您的需求进行修改和扩展。希望对您有帮助！