在启动类里加入corsFilter

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.annotation.Bean;

import org.springframework.web.cors.CorsConfiguration;

import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

import org.springframework.web.filter.CorsFilter;

@SpringBootApplication

public class NuclearApplication {

    /**

     * 跨域过滤器

     *

     * @return

     */

    @Bean

    public CorsFilter corsFilter() {

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();

        source.registerCorsConfiguration("/**", buildConfig());

        return new CorsFilter(source);

    }

    private CorsConfiguration buildConfig() {

        CorsConfiguration corsConfiguration = new CorsConfiguration();

        corsConfiguration.addAllowedOrigin("*");

        corsConfiguration.addAllowedHeader("*");

        corsConfiguration.addAllowedMethod("*");

        return corsConfiguration;

    }

    public static void main(String[] args) {

        SpringApplication.run(NuclearApplication.class, args);

    }

}

特殊情况可以使用第二种来做，加入一个filter

import org.springframework.stereotype.Component;

import javax.servlet.*;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

@Component

public class AccessFilter implements Filter {

	@Override

	public void init(FilterConfig filterConfig) throws ServletException {

	}

	@Override

	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

		HttpServletResponse response = (HttpServletResponse) servletResponse;

		HttpServletRequest request = (HttpServletRequest) servletRequest;

		response.setContentType("application/json; charset=utf-8");

		response.setCharacterEncoding("UTF-8");

		response.setHeader("Access-Control-Max-Age", "3600");

		response.setHeader("Access-Control-Allow-Methods", "POST, GET,PUT, OPTIONS, DELETE");

		response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));

		response.setHeader("Access-Control-Allow-Credentials", "true");

		response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, token");

		filterChain.doFilter(servletRequest, servletResponse);

	}

	@Override

	public void destroy() {

	}

}