JS跨域：1.解决方案之-SpringMVC拦截器

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一拦截器代码

package com.wiimedia.controller;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;public class CommonInterceptor implements HandlerInterceptor {    private List<String> excludedUrls;    public List<String> getExcludedUrls() {        return excludedUrls;    }    public void setExcludedUrls(List<String> excludedUrls) {        this.excludedUrls = excludedUrls;    }    /**     *      * @Description:      * 在业务处理器处理请求之前被调用 如果返回false      * 从当前的拦截器往回执行所有拦截器的afterCompletion(),     * 再退出拦截器链, 如果返回true 执行下一个拦截器,     * 直到所有的拦截器都执行完毕 再执行被拦截的Controller     * 然后进入拦截器链,     * 从最后一个拦截器往回执行所有的postHandle()     * 接着再从最后一个拦截器往回执行所有的afterCompletion()     *      * @param  request     *      * @param  response     *      * @return: boolean     *      * @author: SongJia     *      * @date: 2016-6-27 下午4:17:51     *      */    public boolean preHandle(HttpServletRequest request,            HttpServletResponse response, Object handler) throws Exception {        response.setHeader("Access-Control-Allow-Origin", "*");        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");        response.setHeader("Access-Control-Max-Age", "3600");        response.setHeader("Access-Control-Allow-Headers", "x-requested-with");        return true;    }    // 在业务处理器处理请求执行完成后,生成视图之前执行的动作    public void postHandle(HttpServletRequest request,            HttpServletResponse response, Object handler,            ModelAndView modelAndView) throws Exception {    }    /**     *      * @Description:     * 在DispatcherServlet完全处理完请求后被调用     * 当有拦截器抛出异常时,     * 会从当前拦截器往回执行所有的拦截器的afterCompletion()     *      * @param request     *      * @param response     *      * @param handler     *      * @param ex     *      * @author: SongJia     *      * @date: 2016-6-27 下午4:27:51     *      */    public void afterCompletion(HttpServletRequest request,            HttpServletResponse response, Object handler, Exception ex)            throws Exception {    }}1
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二 applicationContext.xml中的配置

<mvc:interceptors>           <mvc:interceptor>           <mvc:mapping path="/**" />           <bean class="com.wiimedia.controller.CommonInterceptor">           <property name="excludedUrls">            <list>                <value>/</value>            </list>           </property>           </bean>        </mvc:interceptor>    </mvc:interceptors>

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