java跨域解决的几种方法

绝地灬酷狼 2023-10-18 18:24 38阅读 0赞

原文：https://blog.csdn.net/yue29026/article/details/70860719

一、全部接口解决跨域问题  
要想解决测试人员的跨域问题，在请求访问前解决跨域问题

过滤器filter

public class SimpleCORSFilter implements Filter{  
    
        @Override  
        public void destroy() {  
    
        }  
    
        @Override  
        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");  
                chain.doFilter(req, res);  
    
        }  
    
        @Override  
        public void init(FilterConfig arg0) throws ServletException {  
    
        }  
    
    }

拦截器interceptor

@Component
    public class CORSInterceptor extends HandlerInterceptorAdapter {
      @Override
      public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
          //添加跨域CORS
          response.setHeader("Access-Control-Allow-Origin", "*");
          response.setHeader("Access-Control-Allow-Headers", "X-Requested-With,content-type,token");
          response.setHeader("Access-Control-Allow-Methods", "GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, PATCH");
          return true;
      }
    }

单个接口解决跨越问题  
在接口的代码中添加下面这端代码

response.addHeader("Access-Control-Allow-Origin", "*");
     response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
     response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
     response.addHeader("Access-Control-Max-Age", "1800");//30 min

改变接口方法解决跨越问题  
简单的说，就是把post方法的接口，变成get方法，也可以有效的解决跨域的问题。但是这种方法不建议用，毕竟它改变了方法的性质。