<!-- 2019-01-15   解决跨域问题 --><filter><filter-name>crossFilter</filter-name><filter-class>com.sx.test.controller.CorsFilter</filter-class></filter><filter-mapping><filter-name>crossFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping>

package com.sx.test.controller;import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;import javax.servlet.Filter;
import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.annotation.WebFilter; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebFilter(filterName = "CORSFilter", urlPatterns = {"/*"}) @Order(value = 1) @Configuration 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 { System.out.println("Filter 过滤器 执行 了"); HttpServletRequest request = (HttpServletRequest) servletRequest; HttpServletResponse response = (HttpServletResponse) servletResponse; // 响应标头指定 指定可以访问资源的URI路径 response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin")); //响应标头指定响应访问所述资源到时允许的一种或多种方法 response.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, OPTIONS, DELETE"); //设置 缓存可以生存的最大秒数 response.setHeader("Access-Control-Max-Age", "3600"); //设置 受支持请求标头 response.setHeader("Access-Control-Allow-Headers", "x-requested-with"); // 指示的请求的响应是否可以暴露于该页面。当true值返回时它可以被暴露 response.setHeader("Access-Control-Allow-Credentials","true"); filterChain.doFilter(servletRequest, servletResponse); } @Override public void destroy() { } }