java后端解决跨域问题新建一个filter 复制代码 public class SimpleCORSFilter implements Filter{ @Override

最新推荐文章于 2022-11-10 21:51:09 发布

原创最新推荐文章于 2022-11-10 21:51:09 发布 · 1.7k 阅读

3 ·

CC 4.0 BY-SA版权

java后台开发专栏收录该内容

49 篇文章

订阅专栏

本文介绍了一种通过创建过滤器解决Java后端跨域问题的方法。具体实现为新建一个LoginFilter类，并在web.xml中进行配置。该过滤器允许所有来源的请求，并设置响应头以支持多种HTTP方法。

java后端解决跨域问题

新建一个filter

public class LoginFilter 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 {  
          
    }  
  
}

另外web.xml中增加如下配置

<filter>  
      <filter-name>loginfilter</filter-name>  
      <filter-class>com.ssm.web.filter.LoginFilter </filter-class>  
    </filter>  
    <filter-mapping>  
      <filter-name>loginfilter</filter-name>  
      <url-pattern>/*</url-pattern>  
    </filter-mapping>