java服务器的Interceptor怎么配置跨域请求
时间: 2024-05-07 16:21:39 浏览: 11
要Java服务器的Interceptor来允许跨域请求,可以使用Java Servlet Filter。下面是一个基本的示例:
```java
import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class CorsFilter implements Filter {
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
// 允许所有的来源访问
response.setHeader("Access-Control-Allow-Origin", "*");
// 允许的请求方法
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
// 允许的请求头
response.setHeader("Access-Control-Allow-Headers", "Authorization, Content-Type, X-Requested-With");
// 预检请求的有效期,单位为秒
response.setHeader("Access-Control-Max-Age", "3600");
chain.doFilter(req, res);
}
public void init(FilterConfig filterConfig) {}
public void destroy() {}
}
```
在这个示例中,我们设置了一些响应头来允许跨域请求。然后,我们将这个Filter配置到你的web.xml文件中:
```xml
<filter>
<filter-name>CorsFilter</filter-name>
<filter-class>com.example.CorsFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CorsFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
```
现在,你的Java服务器将允许跨域请求。