上次给一个网站写网站 前后端分离 最后跪在ajax跨域上面了 自己在网上找了个方法 亲试可用 记录一下
写一个类 继承HandlerInterceptorAdapter
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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"); // 是否允许浏览器携带用户身份信息（cookie）return true;}} |
然后在xml里面配置一下路径
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<mvc:interceptors><!--过滤所有请求，处理跨域请求问题 --><mvc:interceptor><mvc:mapping path="/**" /><bean class="com.util.CommonInterceptor" /></mvc:interceptor></mvc:interceptors> |
这样就可以了 不过有篇博客说针对简单跨域没问题。但是针对post＋json请求却失败，提示跨域失败。所以下面记录一下他的解决方式
建立一个类 继承 OncePerRequestFilter
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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里面设置一下
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<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> |
然后就可以了 上述方式为spring3.0版本 如果是4.0版本可以用下面方式（无测）
xml里面配置
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<mvc:cors> <mvc:mapping path="/**" allowed-origins="*" allow-credentials="true" max-age="1800" allowed-methods="GET,POST,OPTIONS"/></mvc:cors> |
PS：使用SpringMVC解决Ajax跨域问题
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package com.mengyao.system.filter; import java.io.IOException;import javax.servlet.FilterChain;import javax.servlet.ServletException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.stereotype.Component;import org.springframework.web.filter.OncePerRequestFilter;/** * CORSFilter 解决跨域问题 * @author mengyao * */@Componentpublic class InitCORSFilter extends OncePerRequestFilter { private Logger logger = LoggerFactory.getLogger(InitCORSFilter.class); public InitCORSFilter() { logger.info("==== 初始化系统允许跨域请求 ===="); } /** * 解决跨域：Access-Control-Allow-Origin，值为*表示服务器端允许任意Domain访问请求 */ @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())) { response.addHeader("Access-Control-Allow-Origin", "*"); response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS"); response.addHeader("Access-Control-Allow-Headers", "origin, content-type, accept, x-requested-with, sid, mycustom, smuser"); response.addHeader("Access-Control-Max-Age", "1800");//30 min } filterChain.doFilter(request, response); }} |
好了，代码到此结束！
总结
以上所述是小编给大家介绍的Springmvc ajax跨域请求处理方法实例详解，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
