Springmvc ajax跨域請求處理

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上次給一個網站寫網站  前後端分離 最後跪在ajax跨域上面了  自己在網上找了個方法  親試可用  記錄一下

寫一個類  繼承HandlerInterceptorAdapter 

package com.util;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;public class CommonInterceptor extends HandlerInterceptorAdapter {public boolean preHandle(HttpServletRequest request,HttpServletResponse response, Object handler) throws Exception {response.setHeader("Access-Control-Allow-Origin", "*");response.setHeader("Access-Control-Allow-Methods", "*");response.setHeader("Access-Control-Max-Age", "3600");response.setHeader("Access-Control-Allow-Headers","Origin, X-Requested-With, Content-Type, Accept");response.setHeader("Access-Control-Allow-Credentials", "true"); // 是否允許瀏覽器攜帶使用者身份資訊（cookie）return true;}}

然後在xml裡面配置一下路徑

<mvc:interceptors><!--過濾所有請求，處理跨域請求問題 --><mvc:interceptor><mvc:mapping path="/**" /><bean class="com.util.CommonInterceptor" /></mvc:interceptor></mvc:interceptors>

　這樣就可以了  不過有篇部落格說針對簡單跨域沒問題。但是針對post＋json請求卻失敗，提示跨域失敗。所以下面記錄一下他的解決方式

建立一個類  繼承 OncePerRequestFilter 

public class CrossFilter extends OncePerRequestFilter {    @Override    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {        if (request.getHeader("Access-Control-Request-Method") != null && "OPTIONS".equals(request.getMethod())) {            // CORS "pre-flight" request            response.addHeader("Access-Control-Allow-Origin", "*");            response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");            response.addHeader("Access-Control-Allow-Headers", "Content-Type");            response.addHeader("Access-Control-Max-Age", "1800");//30 min        }        filterChain.doFilter(request, response);    }}

web.xml裡面設定一下

<filter>    <filter-name>cors</filter-name>    <filter-class>cn.***.filter.CrossFilter</filter-class></filter><filter-mapping>    <filter-name>cors</filter-name>    <url-pattern>/*</url-pattern></filter-mapping>

然後就可以了  上述方式為spring3.0版本  如果是4.0版本可以用下面方式（無測）

xml裡面配置

    <mvc:cors>        <mvc:mapping path="/**" allowed-origins="*" allow-credentials="true" max-age="1800" allowed-methods="GET,POST,OPTIONS"/>    </mvc:cors>

部分引用   飛昂之雪  的部落格  http://www.cnblogs.com/asfeixue/p/4363372.html

Springmvc ajax跨域請求處理