Vue访问后端的跨域问题
创建Filter类
import javax.servlet.Filter
public class CorsFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) {
}
@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
HttpServletRequest request = (HttpServletRequest) req;
response.setHeader("Access-Control-Allow-Origin", "*"); // 设置允许所有跨域访问
response.setHeader("Access-Control-Allow-Methods", "POST,GET,PUT,OPTIONS,DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "Origin,X-Requested-With,Content-Type,Accept,Authorization,token");
response.setHeader("Access-Control-Allow-Credentials", "true");
chain.doFilter(req, res);
}
@Override
public void destroy() {
}
}
在web.xml配置Filter
<filter>
<filter-name>CorsFilter</filter-name>
<filter-class></filter-class>
</filter>
<filter-mapping>
<filter-name>CorsFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>