SpringBoot拦截器----addInterceptors
Posted @云心以出岫 i
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了SpringBoot拦截器----addInterceptors相关的知识,希望对你有一定的参考价值。
1.创建我们自己的拦截器类并实现 HandlerInterceptor 接口
2.实现WebMvcConfigurer接口中的addInterceptors方法把自定义的拦截器类添加进来即可
ps:Spring boot 1.x是继承WebMvcConfigurerAdapter,等下会说到,但下面会是以spring boot 2.x为例子。
自定义拦截器代码:
package com.glj.componemt;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Created with IntelliJ IDEA.
* User: GuoLiangJun
* Date: 2019/9/8
* Time: 23:21
*/
public class LoginHandlerInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
Object user = request.getSession().getAttribute("loginUser");
if(user == null){
//未登陆,返回登陆页面
request.setAttribute("msg","没有权限请先登陆");
request.getRequestDispatcher("/index.html").forward(request,response);
return false;
}else{
//已登陆,放行请求
return true;
}
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
}
}
package com.glj.componemt;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Created with IntelliJ IDEA.
* User: GuoLiangJun
* Date: 2019/9/8
* Time: 23:21
*/
public class LoginHandlerInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
Object user = request.getSession().getAttribute("loginUser");
if(user == null){
//未登陆,返回登陆页面
request.setAttribute("msg","没有权限请先登陆");
request.getRequestDispatcher("/index.html").forward(request,response);
return false;
}else{
//已登陆,放行请求
return true;
}
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
}
}
上面的代码就是判定session是否存在,存在则放行(辣鸡例子而已)
实现WebMvcConfigurer接口中的addInterceptors方法把自定义的拦截器类添加进来代码:
package com.glj.config;
import com.glj.componemt.LoginHandlerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.config.annotation.*;
/**
* Created with IntelliJ IDEA.
* User: GuoLiangJun
* Date: 2019/09/04
* Time: 16:51
*/
@Configuration
public class MyWebMvcConfig implements WebMvcConfigurer {
/**
* 添加拦截器
* @param registry
*/
@Override
public void addInterceptors(InterceptorRegistry registry) {
InterceptorRegistration interceptorRegistration = registry.addInterceptor(new LoginHandlerInterceptor());
interceptorRegistration.excludePathPatterns("/asserts/**","/error/**","/index.html","/","/user/login");
interceptorRegistration.addPathPatterns("/**");
}
}
package com.glj.config;
import com.glj.componemt.LoginHandlerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.config.annotation.*;
/**
* Created with IntelliJ IDEA.
* User: GuoLiangJun
* Date: 2019/09/04
* Time: 16:51
*/
@Configuration
public class MyWebMvcConfig implements WebMvcConfigurer {
/**
* 添加拦截器
* @param registry
*/
@Override
public void addInterceptors(InterceptorRegistry registry) {
InterceptorRegistration interceptorRegistration = registry.addInterceptor(new LoginHandlerInterceptor());
interceptorRegistration.excludePathPatterns("/asserts/**","/error/**","/index.html","/","/user/login");
interceptorRegistration.addPathPatterns("/**");
}
}
其中addPathPatterns("/**")对所有请求都拦截,但是(excludePathPatterns)排除了一些连接请求的拦截。
以上是关于SpringBoot拦截器----addInterceptors的主要内容,如果未能解决你的问题,请参考以下文章