Springmvc ajax跨域请求处理方法实例详解

2024-07-13 10:13:02

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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

<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

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

<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

  <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

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VeVb武林网网站的支持！

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