Springboot跨域过滤器

旧城等待， 2022-12-21 09:26 173阅读 0赞

package com.shy.filter;
    
    import javax.servlet.*;
    import javax.servlet.annotation.WebFilter;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    import java.util.Arrays;
    import java.util.Map;
    
    /**
     * 解决跨域问题/* 表示全部拦截
     */
    @WebFilter(filterName = "loginFilter",urlPatterns = "/*")
    public class CrossDomainFilter implements Filter {
        
    
        //拦截的方法
        public void doFilter(ServletRequest req, ServletResponse res, FilterChain filterChain) throws IOException, ServletException {
        
    
            HttpServletRequest request = (HttpServletRequest) req;
            HttpServletResponse response = (HttpServletResponse) res;
    
            System.out.println("\n===============================================");
            System.out.println("请求路径："+request.getMethod()+"\t"+request.getRequestURI());
    
            Map<String, String[]> parameterMap = request.getParameterMap();
            for (Map.Entry<String, String[]> entry : parameterMap.entrySet()) {
        
                String key = entry.getKey();
                String[] value = entry.getValue();
                if(value.length == 1) {
        
                    System.out.println(key+":"+ value[0]);
                }else {
        
                    System.out.println(key+":"+ Arrays.toString(value));
                }
            }
    
            //解决跨域的问题
            response.setHeader("Access-Control-Allow-Origin","*");//这里配置的是*，也可以配置为具体的地址，如http://localhost:8080
            response.setHeader("Access-Control-Allow-Credentials","true");
            response.setHeader("Access-Control-Allow-Headers", "Content-Type,Content-Length, Authorization, Accept,X-Requested-With,X-App-Id, X-Token");
            response.setHeader("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
            response.setHeader("Access-Control-Max-Age", "3600");
    
            filterChain.doFilter(request,response);
        }
    
        //销毁时候调用的方法
        public void destroy() {
         }
    }