SpringBoot拦截器的实现

一、编写拦截器：二、编写登录接口：此方法为（一）拦截器中2.的Map

一、编写拦截器：

1、首先需要确定拦截器的位置，拦截器拦截当前目录以及所有子目录（递归）。

package com.test.interceptor; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; @Configuration public class Interceptor extends WebMvcConfigurerAdapter { //拦截器类，用来拦截/interceptorService/regionalLevel接口 @Bean public LoginPermissionInterceptor getLoginInterceptor() { return new LoginPermissionInterceptor(); } //拦截器类，用来拦截除了/interceptorService/regionalLevel接口的所有接口 @Bean public RequestPermissionInterceptor getRequestInterceptor() { return new RequestPermissionInterceptor(); } @Override public void addInterceptors(InterceptorRegistry registry) { // 拦截器的路径 addPathPatterns("/**")配置拦截路径，其中/**表示当前目录以及所有子目录（递归），/* registry.addInterceptor(getLoginInterceptor()).addPathPatterns("/interceptorService/regionalLevel"); //拦截器的路径 addPathPatterns("/**")，excludePathPatterns("/interceptorService/regionalLevel")除了这个接口 registry.addInterceptor(getRequestInterceptor()).addPathPatterns("/**") .excludePathPatterns("/interceptorService/regionalLevel"); // super.addInterceptors(registry); } }

2、获取Header中的信息，进行具体处理。

package com.test.interceptor; import java.util.Calendar; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.HttpStatus; import org.springframework.stereotype.Component; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import com.test.interceptor.service.IInterceptorService; @Component public class LoginPermissionInterceptor implements HandlerInterceptor { Logger logger = LoggerFactory.getLogger(LoginPermissionInterceptor.class); @Autowired private IInterceptorService interceptorService; @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object arg2) throws Exception { // 添加要返回的非业务字段 response.addHeader("requestTime", String.valueOf(Calendar.getInstance().getTimeInMillis())); System.out.println("进入登录拦截器-----------"); // 获取parentRegion String token = request.getHeader("token"); //判断是否有空格，null等 if(!StringUtils.isNotBlank(token)) { //返回401 response.setStatus(HttpStatus.UNAUTHORIZED.value()); return false; } System.out.println("登录拦截器获取到Header中参数：" + token); //获取地区级别的方法，可以自己编写实现。 Map<String, Object> data = interceptorService.getRegionalLevel(token); //获取到权限信息存入session request.getSession().setAttribute("region",data.get("region")); request.getSession().setAttribute("level",data.get("level")); return true; } @Override public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3) throws Exception { } @Override public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3) throws Exception { } }

二、编写登录接口：

1、编写controller、service、dao、mapper等，实现interceptorService/regionalLevel接口请求操作。 然后通过postman测试该接口，携带header信息，发送请求，可以正常通过拦截器。如果不懈怠header，会报401。（浏览器测试结果明显）。

①controller类

②service类 登录方法通过拦截器后返回结果，方法如下：

此方法为（一）拦截器中2.的Map<String, Object> data = interceptorService.getRegionalLevel(token);

public Map<String, Object> getRegionalLevel(String token) { List<DqxxInfo> dqxxbInfoList = null; Map<String, Object> data = new HashMap<String, Object>(); Map<String, Object> paramMap = new HashMap<String, Object>(); if("0".equals(token)) { paramMap.put("token", 1); paramMap.put("dqjb", 1); dqxxbInfoList = interceptorDao.getRegionalLevel(paramMap); if(dqxxbInfoList != null) { Integer options = (int) (0 + Math.random() * (dqxxbInfoList.size())); data.put("region", dqxxbInfoList.get(options).getDqxsmc()); data.put("level", dqxxbInfoList.get(options).getDqjb()); } } System.out.println("进入登录拦截器验证方法......"); return data; }

③dao类 ④mapper.xml

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