tomcat添加跨域访问功能-Access-Control-Allow-Origin:*
目标：tomcat服务器提供的接口，不能在其他域中访问的时候，需要增 Access-Control-Allow-Origin:*
直接配置的方法很多，但是我一个没有成功过，所以只能自己写拦截器了。
1. 编写拦截器代码
新建一个类，实现Filter接口，代码如下
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package com.itxc.filter;import javax.servlet.*;import javax.servlet.http.HttpServletResponse;import java.io.IOException;public class CORSFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { HttpServletResponse httpResponse = (HttpServletResponse) servletResponse; httpResponse.addHeader("Access-Control-Allow-Origin", "*"); filterChain.doFilter(servletRequest, servletResponse); } @Override public void destroy() { }} |
2. 配置web.xml
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<filter> <filter-name>CorsFilter</filter-name> <filter-class>com.itxc.filter.CORSFilter</filter-class></filter><filter-mapping> <filter-name>CorsFilter</filter-name> <url-pattern>/*</url-pattern></filter-mapping> |
3. 删除你之前为了这个功能配置的乱起八糟的配置吧
转载自：https://blog.csdn.net/adolph_yang/article/details/80029551
