SpringBoot 解决ajax请求时的跨域问题

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 1. 在项目中新建一个过滤器：

@Configuration
@WebFilter(filterName = "crosFilter", urlPatterns = "/*")
public class CorsFilter implements Filter {

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

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		HttpServletResponse servletResponse = (HttpServletResponse) response;
		HttpServletRequest servletRequest = (HttpServletRequest) request;
		servletResponse.setHeader("Access-Control-Allow-Origin", servletRequest.getHeader("Origin")); 
		servletResponse.setHeader("Access-Control-Allow-Credentials", "true"); 
		servletResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");  
		servletResponse.setHeader("Access-Control-Max-Age", "3600");  
		servletResponse.setHeader("Access-Control-Allow-Headers", "Content-Type, x-requested-with, X-Custom-Header, Authorization");  
        chain.doFilter(request, response);
	}

	@Override
	public void destroy() {
	}

}

2. 在ajax请求时设置跨域：

xhrFields: {
      withCredentials: true
},
crossDomain: true