废话不多说,直接上代码,相信都能看的懂
一共两布,第一步,创建Interceptor拦截
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package com.cy.example.config; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; public class LoginInterceptor implements HandlerInterceptor { private Logger logger = LoggerFactory.getLogger(LoginInterceptor. class ); public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { // TODO Auto-generated method stub } public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { // TODO Auto-generated method stub } public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { // TODO Auto-generated method stub //获取session HttpSession session = request.getSession( true ); logger.info( "----进入登录拦截器--url:" +request.getServletPath()+ "-----" ); if (session.getAttribute(WebConfig.LOGIN_USER) == null ){ logger.info( "------跳转到login页面-----" ); response.sendRedirect(request.getContextPath()+ "/index" ); return false ; } else { session.setAttribute(WebConfig.LOGIN_USER, session.getAttribute(WebConfig.LOGIN_USER)); return true ; } } } |
第二步,注册创建的拦截器
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package com.cy.example.config; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; @Configuration public class WebConfig extends WebMvcConfigurerAdapter { public static String LOGIN_USER = "loginUser" ; public WebConfig() { super (); } //因为新加了拦截器,这里需要重新设置资源地址 @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { registry.addResourceHandler( "/static/**" ).addResourceLocations( "classpath:/static/" ); registry.addResourceHandler( "/templates/**" ).addResourceLocations( "classpath:/templates/" ); super .addResourceHandlers(registry); } @Override public void configureDefaultServletHandling( DefaultServletHandlerConfigurer configurer) { configurer.enable(); } @Override public void addInterceptors(InterceptorRegistry registry) { // 拦截规则:除了login,其他都拦截判断,excludePathPatterns是排除拦截的路径,一个是登录验证地址,一个是登录页 registry.addInterceptor( new LoginInterceptor()).addPathPatterns( "/**" ).excludePathPatterns( "/index" , "/system/user/validate" ); super .addInterceptors(registry); } } |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/qq_20989105/article/details/78141009