spring boot中使用拦截器

1.添加依赖

		
			org.springframework.boot
			spring-boot-starter-web
		

2.自己编写一个登录拦截器类
这里只重写了请求处理前的拦截

package com.example.demo.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String password = request.getParameter("password");
        if(!"123456".equals(password)){
            return false;
        }
        return true;
    }
}

3.编写拦截器配置类
把刚刚的LoginHandlerInterceptor 类加进来

package com.example.demo.config;

import org.aopalliance.intercept.Interceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class MyMvcConfig implements WebMvcConfigurer {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        InterceptorRegistration registration = registry.addInterceptor(new LoginHandlerInterceptor());

        //registration.addPathPatterns("/**").excludePathPatterns("/");
    }

}