cors解决ajax跨域

 ???????????????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 { ???@Override ???public void destroy() { ????????} ???@Override ???public 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 = 204 ?????????response.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); ????} ???@Override ???public void init(FilterConfig arg0) throws ServletException { ???????????} }