springboot+angular4前后端分离 跨域问题

springboot中新增一个过滤器如下：

package com.rtpksps.kss.config;import org.springframework.stereotype.Component;import javax.servlet.*;import javax.servlet.http.HttpServletResponse;import java.io.IOException;

/** * @author Administrator * @title: OriginFilter * @projectName rtpksps-kss * @description: TODO * @date 2019/9/29 0029下午 15:52 */@Componentpublic class OriginFilter implements Filter {    @Override    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {        HttpServletResponse response = (HttpServletResponse) servletResponse;        response.setHeader("Access-Control-Allow-Origin", "*");        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE,PUT");        response.setHeader("Access-Control-Max-Age", "3600");        response.setHeader("Access-Control-Allow-Headers", "x-requested-with");        filterChain.doFilter(servletRequest, servletResponse);    }

    @Override    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override    public void destroy() {

    }}

在接口中指定需要的方法类型

angular页面发送http请求：

reqData(){ // 向后台请求数据

var url = "http://192.168.100.100:8888/cmsRole/show";//视频教程中的测试用请求地址

var _that = this;

this.http.get(url).subscribe(function(data){//请求成功的回调函数

console.log(data);

},function(err){// 请求失败的回调函数

console.log(err);

})

}

原文地址：https://www.cnblogs.com/lideqiang0909/p/11609284.html