【原】spring boot添加cros全局过滤器

#新增一个过滤器类并实现filter接口

public class CorsFilter implements Filter {

	final static org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(CorsFilter.class);

	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
		HttpServletResponse response = (HttpServletResponse) res;
		response.setHeader("Access-Control-Allow-Origin", "*");
		response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
		response.setHeader("Access-Control-Max-Age", "3600");
		response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
		System.out.println("*********************************过滤器被使用**************************");
		chain.doFilter(req, res);
	}
	public void init(FilterConfig filterConfig) {}
	public void destroy() {}
}

# 配置过滤器使其生效,注意的是需要放在所有过滤器之前（注意：如果有其他过滤器必须配置@order()注解，让优先级为最高,如果不配置的优先级会出现跨域问题。）

        @Bean
    @Order(1)
    public FilterRegistrationBean crosFilter() {

        System.out.println("初始化跨域过滤器开始==================================");

        final FilterRegistrationBean registrationBean = new FilterRegistrationBean();
        com.liushun.common.filter.CorsFilter  crCorsFilter = new com.liushun.common.filter.CorsFilter();
        registrationBean.setFilter(crCorsFilter);
        return registrationBean;

    }