springmvc解决跨域问题

第一种方法：

跨域实现类

package com.sq.filter;

import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


@Component
public class AccessFilter extends HttpServlet implements Filter {

    private static final long serialVersionUID = 1L;


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

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

        HttpServletResponse httpResponse = (HttpServletResponse) response;
        httpResponse.setHeader("Access-Control-Allow-Origin", "*");
        httpResponse.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
        httpResponse.setHeader("Access-Control-Max-Age", "1800");
        httpResponse.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
        httpResponse.setHeader("Access-Control-Allow-Credentials", "true");
        chain.doFilter(request, httpResponse);
    }
}

web.xml配置

<filter>
         <filter-name>crosfilter-name>
         <filter-class>com.sq.filter.AccessFilterfilter-class>
     filter>
     <filter-mapping>
         <filter-name>crosfilter-name>
         <url-pattern>/*url-pattern>
     filter-mapping>