maven进入包
<!-- start jwt引入-->
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.9.1</version>
</dependency>
<!-- end jwt引入-->
新建一个类ResultVO作为返回前端的类型
package com.bruce.vo;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
/**
* @Auther:BruceWong
* @Date: 2021/6/16 - 06 - 16 - 11:15
* @Description:com.bruce.vo
* @Version: 1.0
*/
@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString
@ApiModel(value = "响应的VO对象",description = "封装接口返回给前端的数据")
public class ResultVO {
@ApiModelProperty("响应状态码")
private int code;
@ApiModelProperty("响应提示信息")
private String msg;
@ApiModelProperty("响应数据内容")
private Object data;
}
新建一个类TokenInterceptor并实现HandlerInterceptor
package com.bruce.interceptor;
import com.bruce.vo.ResultStatus;
import com.bruce.vo.ResultVO;
import com.bruce.vo.TokenSecret;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.jsonwebtoken.*;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
@Component
public class TokenInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
String method = request.getMethod();
if ("options".equalsIgnoreCase(method)) {
return true;
}
String token = request.getHeader("token");
if (token == null) {
ResultVO resultVO = new ResultVO(ResultStatus.NO, "请先登录", null);
doResponse(response, resultVO);
} else {
try {
JwtParser parser = Jwts.parser();
parser.setSigningKey(TokenSecret.SUFIX);
Jws<Claims> claimsJws = parser.parseClaimsJws(token);
return HandlerInterceptor.super.preHandle(request, response, handler);
} catch (ExpiredJwtException e) {
ResultVO resultVO = new ResultVO(ResultStatus.NO, "登录过期请重新登录", null);
doResponse(response, resultVO);
} catch (UnsupportedJwtException e) {
ResultVO resultVO = new ResultVO(ResultStatus.NO, "Token不合法，请自重", null);
doResponse(response, resultVO);
} catch (Exception e) {
ResultVO resultVO = new ResultVO(ResultStatus.NO, "请先登录", null);
doResponse(response, resultVO);
}
}
return false;
}
private void doResponse(HttpServletResponse response, ResultVO resultVO) throws IOException {
response.setContentType("application/json");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
String s = new ObjectMapper().writeValueAsString(resultVO);
out.print(s);
out.flush();
out.close();
}
}
新建一个拦截器的配置类InterceptorConfig并实现WebMvcConfigurer接口
package com.bruce.config;
import com.bruce.interceptor.TokenInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class InterceptorConfig implements WebMvcConfigurer {
@Autowired
private TokenInterceptor checkTokenInterceptor;
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(checkTokenInterceptor)
.addPathPatterns("/shopcart/**").addPathPatterns("/order/**") //设置要拦截过滤的请求url
.excludePathPatterns("/user/**"); //设置不要要拦截过滤的请求url
}
}
