var str = "{'id':'89','fundCode':'000311'}";    jQuery.ajax({url:'http://172.88.88.888:8180/test/app/product/public/getManaAndComp',type:"post",dataType:"text",data:{"param":str,"osFlag":'3'},async:true,success:function(serverinfo){console.log(serverinfo);var Data=Base64.decode(serverinfo);                            Data=JSON.parse(Data);console.log(Data);}, // success 结束
                    error:function(){console.log('error');                }});

     <filter><filter-name>cors</filter-name><filter-class>com.datangwealth.common.filter.CorsConfig</filter-class></filter><filter-mapping><filter-name>cors</filter-name><url-pattern>/*</url-pattern></filter-mapping>

package com.datangwealth.modules.monitor.service;import java.io.IOException;import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;public class CorsConfig  implements Filter {
@Overridepublic void destroy() {}@Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,FilterChain filterChain) throws IOException, ServletException {HttpServletResponse response = (HttpServletResponse) servletResponse;HttpServletRequest request = (HttpServletRequest) servletRequest;response.setHeader("Access-Control-Allow-Origin", "*");           String token = request.getHeader("token");System.out.println("filter origin:"+token);//通过打印，可以看到一次非简单请求，会被过滤两次，即请求两次，第一次请求确认是否符合跨域要求（预检），这一次是不带headers的自定义信息，第二次请求会携带自定义信息。if ("OPTIONS".equals(request.getMethod())){//这里通过判断请求的方法，判断此次是否是预检请求，如果是，立即返回一个204状态吗，标示，允许跨域；预检后，正式请求，这个方法参数就是我们设置的post了response.setStatus(204); //HttpStatus.SC_NO_CONTENT = 204response.setHeader("Access-Control-Allow-Methods", "POST, GET, DELETE, OPTIONS, DELETE");//当判定为预检请求后，设定允许请求的方法response.setHeader("Access-Control-Allow-Headers", "Content-Type, x-requested-with, Token"); //当判定为预检请求后，设定允许请求的头部类型response.addHeader("Access-Control-Max-Age", "3600");                           }filterChain.doFilter(servletRequest, servletResponse); }@Overridepublic void init(FilterConfig arg0) throws ServletException {        }
}