网页：包含一个CDN和一个post
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script> <script> function search() { $.post({ url:‘http://localhost:8080/onlineoj/test/update‘, data: { ‘id‘: $(‘#id‘).val(), ‘username‘: $(‘#username‘).val(), ‘password‘: $(‘#password‘).val() }, success:function (data, status){ alert(data); alert(status); } }) // alert(‘xxx‘); return false; } </script> <body> <form> <input type="text" id="id" /> <input type="text" id="username" /> <input type="text" id="password" /> <button type="submit" onclick="return search();">查询</button> </form> </body> </html>
Cros请求
package com.onlineoj.interceptor; import org.springframework.context.annotation.Configuration; import javax.servlet.*; import javax.servlet.annotation.WebFilter; import javax.servlet.http.HttpServletResponse; import java.io.IOException; /** * 跨域请求 */ @WebFilter(filterName = "crosFilter", urlPatterns = "/*") @Configuration public class CrosFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException { //设置跨域请求 HttpServletResponse response = (HttpServletResponse) resp; //此处ip地址为需要访问服务器的ip及端口号 response.setHeader("Access-Control-Allow-Origin", "*"); response.setHeader("Access-Control-Allow-Credentials", "true"); response.setHeader("Access-Control-Allow-Methods", "GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, PATCH"); response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type,Token,Accept, Connection, User-Agent, Cookie"); response.setHeader("Access-Control-Max-Age", "3628800"); chain.doFilter(req, resp); } @Override public void destroy() { } }
原文：https://www.cnblogs.com/littlepage/p/12317871.html