JWTUtils
Jwt 学习
- 引入jwt依赖
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5<dependency>
<groupId>com.auth0</groupId>
<artifactId>java-jwt</artifactId>
<version>3.4.0</version>
</dependency> - 编写JWTUtils工具类
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51public class JWTUtils {
private static final String SIGN = "!QDJHFKSHFK:";
/**
* 生成token header.payload.sign
*
* @param map
* @return
*/
public static String getToken(Map<String, String> map) {
Calendar instance = Calendar.getInstance();
// 默认7天过期
instance.add(Calendar.DATE, 7);
// 创建jwt builder
JWTCreator.Builder builder = JWT.create();
// payload
map.forEach((k, v) -> {
builder.withClaim(k, v);
});
// 指定令牌过期时间和签名
String token = builder.withExpiresAt(instance.getTime())
.sign(Algorithm.HMAC256(SIGN));
return token;
}
/**
* 验证token 合法性
*
* @param token
*/
public static void verify(String token) {
JWT.require(Algorithm.HMAC256(SIGN)).build().verify(token);
}
/**
* 获取token信息
*
* @param token
* @return
*/
public static DecodedJWT getTokenInfo(String token) {
DecodedJWT verify = JWT.require(Algorithm.HMAC256(SIGN)).build().verify(token);
return verify;
}
} - 编写JWTinterceptor类
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31public class JWTInterceptor implements HandlerInterceptor {
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
Map<Object, Object> map = new HashMap<>();
// 获取请求头令牌
String token = request.getHeader("token");
try {
// 验证令牌
JWTUtils.verify(token);
// 放行请求
return true;
} catch (SignatureVerificationException e) {
e.printStackTrace();
map.put("msg", "无效签名");
} catch (TokenExpiredException e) {
e.printStackTrace();
map.put("msg", "token过期");
} catch (AlgorithmMismatchException e) {
e.printStackTrace();
map.put("msg", "token算法不一致");
} catch (Exception e) {
e.printStackTrace();
map.put("msg", "token 无效");
}
map.put("state", false);
String json = new ObjectMapper().writeValueAsString(map);
response.setContentType("application/json;charset=UTF-8");
response.getWriter().println(json);
return false;
}
} - 编写拦截器配置类
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public class InterceptorConfig implements WebMvcConfigurer{
public vpid addInterceptors(InterceptorRegistry registry){
registry.addInterceptor(new JWTInterceptor())
.addPathPatterns("/xxx")
.excludePathPatterns("/xxx");
}
}
