SpringBoot2.7.18拦截器失效不起作用

这几天在做项目,从其他项目中复制粘贴拦截器的代码,然后修修改改,但是拦截器一直不起作用,请求来了进不去,最后发现是我写错了,代码如下:
配置文件:
application.yml

server:
  port: 8080
  servlet:
    context-path: /api/v1

#springboot的配置
spring:
  datasource: #定义数据源
    #127.0.0.1为本机测试的ip,3306是mysql的端口号。serverTimezone是定义时区,照抄就好,mysql高版本需要定义这些东西
    #useSSL也是某些高版本mysql需要问有没有用SSL连接
    url: jdbc:mysql://127.0.0.1:3306/testdb?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=Hongkong&useAffectedRows=true
    username: root  #数据库用户名,root为管理员
    password: 12345678 #该数据库用户的密码
    # 使用druid数据源
    type: com.alibaba.druid.pool.DruidDataSource
  thymeleaf:
    encoding: UTF-8  #编码规范 默认
    cache: false #开发阶段建议关闭缓存
    prefix: classpath:/templates/
    suffix: .html
    mode: LEGACYHTML5 #用非严格的HTML5 默认是HTML5
    servlet:
      content-type: text/html

# mybatis-plus相关配置
mybatis-plus:
  # xml扫描,多个目录用逗号或者分号分隔(告诉 Mapper 所对应的 XML 文件位置)
  mapper-locations: classpath:mapper/*.xml
  # 以下配置均有默认值,可以不设置
  global-config:
    db-config:
      #主键类型 AUTO:"数据库ID自增" INPUT:"用户输入ID",ID_WORKER:"全局唯一ID (数字类型唯一ID)", UUID:"全局唯一ID UUID";
      id-type: auto
      #字段策略 IGNORED:"忽略判断"  NOT_NULL:"非 NULL 判断")  NOT_EMPTY:"非空判断"
      field-strategy: NOT_EMPTY
      #数据库类型
      db-type: MYSQL
  configuration:
    # 是否开启自动驼峰命名规则映射:从数据库列名到Java属性驼峰命名的类似映射
    map-underscore-to-camel-case: true
    # 如果查询结果中包含空值的列,则 MyBatis 在映射的时候,不会映射这个字段
    call-setters-on-nulls: true
    # 这个配置会将执行的sql打印出来,在开发或测试的时候可以用
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

# 日志配置
logging:
  group:
    tomcat:
      - org.apache.catalina
      - org.apache.coyote
      - org.apache.tomcat
  # pre-defined
  level:
    tomcat: INFO
    web: DEBUG
    sql: DEBUG

WebConfig.java

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * 拦截器
 */
@Configuration
public class WebConfig implements WebMvcConfigurer {

    @Autowired
    private RequestHandlerInterceptor requestHandlerInterceptor;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(requestHandlerInterceptor)
                // 需要排除contextPath的值
                .addPathPatterns(contextPath + "/**") // 即/api/v1/**
                .excludePathPatterns(Consts.EXCLUDE_PATH_PATTERNS);
    }
}

RequestHandlerInterceptor.java

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.Arrays;

/**
 * @Author SingleKey
 * @Date 2024/7/28 8:27
 */
@Component
public class RequestHandlerInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws ServletException, IOException {
        System.out.println("\n-------- RequestHandlerInterceptor.preHandle --- ");
        return false;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("\n-------- RequestHandlerInterceptor.postHandle --- ");


    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("\n-------- RequestHandlerInterceptor.afterCompletion --- ");
    }
}

乍一看好像没有问题,错误的地方是WebConfig.java的addPathPatterns(contextPath + "/**")这段代码,如果在配置文件中设置了context-path,那就不能再在这么写:addPathPatterns(contextPath + "/**"),不然将永远匹配不到,其实也是自己debug能力的欠缺,以及对SpringBoot的不够熟悉导致的,今日记下这个问题,供大家参考。

server:
  port: 8080
  servlet:
    context-path: /api/v1
posted @ 2024-08-04 16:13  信仰在心中  阅读(81)  评论(0编辑  收藏  举报