Springmvc ajax跨域请求处理方法实例详解

这篇文章主要介绍了Springmvc ajax跨域请求处理方法实例详解,需要的朋友可以参考下

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

 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

　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

 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

  corscn.***.filter.CrossFilter cors/*

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

PS：使用SpringMVC解决Ajax跨域问题

 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 * */ @Component public 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

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