一、spring mvc action返回string带双引号问题
解决方法:
在springmvc.xml中添加字符串解析器
<!-- 注册string和json解析适配器 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.StringHttpMessageConverter"/> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/> </list> </property> </bean>
二、css文件中引用的img url写法
暂未解决
三、action请求去掉.action
1.web.xml配置
<!-- 注册springmvc核心控制器--> <servlet> <!--servlet-name的值对应一个文件:/WEB-INF/DispatcherServlet-servlet.xml --> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <!-- 指定application.xml文件 --> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <!-- <url-pattern>*.action</url-pattern>--> <!--默认匹配所有请求--> <!--Spring MVC将捕获Web容器所有的请求,包括静态资源的请求,Spring MVC会将它们当成一个普通请求处理--> <url-pattern>/</url-pattern> </servlet-mapping>
2.修改spring.xml文件,让静态文件交给servlet处理
参考:https://www.cnblogs.com/jdbn/p/11020374.html
<!-- 配置SpringMVC --> <!-- 1.开启SpringMVC注解模式 --> <!-- 简化配置: (1)自动注册DefaultAnootationHandlerMapping,AnotationMethodHandlerAdapter (2)提供一些列:数据绑定,数字和日期的format @NumberFormat, @DateTimeFormat, xml,json默认读写支持 --> <mvc:annotation-driven/> <!-- 静态资源交给servlet处理, 在springMVC-servlet.xml中配置<mvc:default-servlet-handler />后, 会在Spring MVC上下文中定义一个org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler, 它会像一个检查员,对进入DispatcherServlet的URL进行筛查, 如果发现是静态资源的请求,就将该请求转由Web应用服务器默认的Servlet处理, 如果不是静态资源的请求,才由DispatcherServlet继续处理。 --> <mvc:default-servlet-handler/>
四、登录拦截器
1.编写LoginInterceptor
package com.eggtwo.euq.interceptor; import com.eggtwo.euq.dto.CurrentSysUser; import com.eggtwo.euq.utils.CacheUtil; import com.eggtwo.euq.utils.ConfigUtil; import com.eggtwo.euq.utils.CookieUtil; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter; public class LoginInterceptor implements HandlerInterceptor { private boolean isAjaxRequest(HttpServletRequest request) { if (request.getHeader("x-requested-with") != null && request.getHeader("x-requested-with").equalsIgnoreCase("XMLHttpRequest")) { //如果是ajax请求响应头会有,x-requested-with System.out.print("发生ajax请求..."); return true; } return false; } @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { String requestUri = request.getRequestURI(); //请求完整路径,可用于登陆后跳转 String contextPath = request.getContextPath(); //项目下完整路径 String url = requestUri.substring(contextPath.length()); //请求页面 System.out.print("发生拦截..."); System.out.println("来自:" + requestUri + "的请求"); //拿到cookie //也就是获取session里的登录状态值 String cookieKey = ConfigUtil.getBossCookieKey(); String cookieValue = CookieUtil.getByName(request, cookieKey); CurrentSysUser currentSysUser =null; String errorMsg=null; if (cookieValue == null) { errorMsg="no login,please login"; }else{ currentSysUser = CacheUtil.getT(cookieValue); if (currentSysUser == null) { errorMsg="no login,please login"; } } if (errorMsg!=null){ if (isAjaxRequest(request)) { response.setContentType("application/json; charset=utf-8"); PrintWriter writer = response.getWriter(); writer.print("{type:0,msg:‘"+errorMsg+"‘}"); writer.close(); response.flushBuffer(); } else { String basePath= request.getContextPath(); response.sendRedirect(basePath+"/account/login?error="+errorMsg); } return false;//返回false不走下面的方法 } //更新缓存过期时间 CacheUtil.remove(cookieValue); CacheUtil.set(cookieValue, currentSysUser, ConfigUtil.getBossCookieTimeoutSecond()); //更新cookie过期时间--覆盖原有的cookie CookieUtil.deleteCookie(response, cookieKey); //写入cookie CookieUtil.addCookie(response, cookieKey, cookieValue, ConfigUtil.getBossCookieTimeoutSecond()); 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 { } }
2.spring mvc中配置要拦截的action
<!--配置拦截器, 多个拦截器,顺序执行 --> <mvc:interceptors> <mvc:interceptor> <!-- 先匹配所有路径,然后排除不需要检查的路径 --> <mvc:mapping path="/**"/> <!--不拦截的action--> <mvc:exclude-mapping path="/account/login"/> <mvc:exclude-mapping path="/account/logout"/> <!-- 网站的登录路径是 "http://localhost:8080/cultivate-job/" 路径path="/"表示的路径就是网站入口路径, 也就是说拦截器只方向两种请求: 1. 错误页面,直接访问jsp页面,这些页面不在WEB-INF目录下,可以直接访问 2. 网站入口请求,检查到没有登录,会重定向到网站入口路径,再被定向到登录页面 --> <mvc:exclude-mapping path="/"/> <!-- 以下是静态资源 --> <mvc:exclude-mapping path="/content/**" /> <mvc:exclude-mapping path="/images/**" /> <mvc:exclude-mapping path="/js/**" /> <mvc:exclude-mapping path="/css/**" /> <mvc:exclude-mapping path="/upload/**" /> <mvc:exclude-mapping path="/download/**" /> <!-- 自定义拦截器路径 --> <bean class="com.eggtwo.euq.interceptor.LoginInterceptor"></bean> </mvc:interceptor> <!-- 当设置多个拦截器时,先按顺序调用preHandle方法,然后逆序调用每个拦截器的postHandle和afterCompletion方法 --> </mvc:interceptors>
五:异常拦截器
LoginInterceptor
原文地址:https://www.cnblogs.com/eggTwo/p/11826280.html
时间: 2024-10-13 11:13:09