根據瀏覽器的保護規則,跨域的時候咱們建立的sessionId是不會被瀏覽器保存下來的,這樣,當咱們在進行跨域訪問的時候,咱們的sessionId就不會被保存下來,也就是說,每一次的請求,服務器就會覺得是一個新的人,而不是同一我的,爲了解決這樣的辦法,下面這種方法能夠解決這種跨域的辦法。html
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { HttpServletResponse res = (HttpServletResponse) servletResponse; HttpServletRequest request=(HttpServletRequest)servletRequest; res.setContentType("textml;charset=UTF-8"); res.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin")); res.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE"); res.setHeader("Access-Control-Max-Age", "0"); res.setHeader("Access-Control-Allow-Headers", "Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token"); res.setHeader("Access-Control-Allow-Credentials", "true"); res.setHeader("XDomainRequestAllowed","1"); filterChain.doFilter(servletRequest,servletResponse); }
SpringMVC xml文件配置方法(若是是springMVC):web
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 掃描相應的控制器組件,不包含Service以及Dao --> <context:component-scan base-package="org.nf.catering.controller"/> <!-- 啓用mvc註解驅動--> <mvc:annotation-driven/> <!-- 全局的跨域訪問配置 --> <mvc:cors> <!-- /** 表示全部請求都將支持跨域方法 --> <mvc:mapping path="/**" allow-credentials="true" allowed-origins="*" allowed-methods="GET,POST,PUT,DELETE"/> </mvc:cors> <!-- 靜態資源處理--> <mvc:default-servlet-handler/> <!-- 配置視圖解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> </beans>
在ajax 請求是也要加相應的東西
$.ajax({
url:url,
//加上這句話
xhrFields: {
withCredentials: true
},
crossDomain: true,
success:function(result){
alert("test");
},
error:function(){
}
});
這樣咱們再跨域測試的時候,就會發現咱們的sessionId是同樣的了,這樣就實現了跨域而且保證在同一個session下。
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