操作步骤:
1、导入knife4j的maven坐标
2、导入knife4j相关配置类
3、设置静态资源、否则接口文档页面无法访问
4、在LoginCheckFilter中设置不需要处理的请求路径

        <dependency>
            <groupId>com.github.xiaoymin</groupId>
            <artifactId>knife4j-spring-boot-starter</artifactId>
            <version>3.0.2</version>
        </dependency>

在WebMvcConfig中添加注解@EnableSwagger2、@EnableKnife4j并添加如下代码:

    @Bean
    public Docket createRestApi() {
        // 文档类型
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.haimeng.reggie.controller"))
                .paths(PathSelectors.any())
                .build();
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("海梦外卖")
                .version("1.0")
                .description("海梦外卖接口文档")
                .build();
    }

设置静态资源、否则接口文档页面无法访问:

    /**
     * 设置静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始静态资源映射");
        registry.addResourceHandler("doc.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
    
    }

在LoginCheckFilter中设置不需要处理的请求路径:

package com.haimeng.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.haimeng.reggie.common.BaseContext;
import com.haimeng.reggie.common.R;
import com.sun.xml.internal.bind.v2.TODO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 检查用户是否完成登录
 */
@WebFilter(filterName = "LoginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {
    //路径匹配器,支持通配符
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

//        1、获取本次请求的URI
        String requestURI = request.getRequestURI();

        log.info("拦截到请求" + requestURI);
        //定义不需要处理的请求路径

        //TODO 这里存在bug需要修复
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg", //移动端发送短信
                "/user/login", //移动端登录
                "/doc.html",
                "/webjars/**",
                "/swagger-resources",
                "/v2/api-docs"
        };

//        2、判断本次请求是否需要处理
        boolean check = check(urls, requestURI);
//        3、如果不需要处理,则直接放行
        if(check){
            log.info("本次请求不需要处理:" + requestURI);
            filterChain.doFilter(request,response);
            return;
        }
//        4-1、判断登录状态,如果已登录,则直接放行
        if(request.getSession().getAttribute("employee") !=null){
            log.info("用户已登录,用户id为:{}",request.getSession().getAttribute("employee"));

//            -----------------------------------------

            Long empId = (Long) request.getSession().getAttribute("employee");
            //通过过滤器获取当前线程中用户的id
            // 并且赋值给当前线程
            // 在当前线程结束前都可以通过getCurrentId方法获取当前用户的id
            BaseContext.setCurrentId(empId);

//            -------------------------------------------

            filterChain.doFilter(request,response);
            return;
        }

        //4-2 判断移动端登录状态,如果已登录,直接放行
        if(request.getSession().getAttribute("user") !=null){
            log.info("用户已登录,用户id为:{}",request.getSession().getAttribute("user"));

//            -----------------------------------------

            Long userId = (Long) request.getSession().getAttribute("user");
            //通过过滤器获取当前线程中用户的id
            // 并且赋值给当前线程
            // 在当前线程结束前都可以通过getCurrentId方法获取当前用户的id
            BaseContext.setCurrentId(userId);

//            -------------------------------------------

            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");
//        5、如果未登录则返回未登录结果,通过输出流方式向客户端页面响应数据
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));

        return; //这句代码不会被执行
    }





    /**
     * 路径匹配,检查此次请求是否需要放行
     * @param urls
     * @param requestURI
     * @return
     */
    public boolean check(String[] urls,String requestURI){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match){
                return true;
            }
        }
        return false;
    }



}

01-06 02:45