JS跨域请求外部服务器的资源

2019-11-19 17:42:40

字体：大中小

来源：转载

供稿：网友

tomcat服务器提供的接口，不能在其他域中访问的时候，需要增 Access-Control-Allow-Origin:*

以下操作均在需要被访问的项目中设置

1、编写拦截器代码

 package com.soft.filter;/** * Created by Administrator on 2017/2/6. */import javax.servlet.*;import javax.servlet.http.HttpServletResponse;import java.io.IOException;public class CORSFilter implements Filter {  @Override  public void init(FilterConfig filterConfig) throws ServletException {  }  @Override  public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {    HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;    httpResponse.addHeader("Access-Control-Allow-Origin", "*");    filterChain.doFilter(servletRequest, servletResponse);  }  @Override  public void destroy() {  }}

2、配置web.xml

<filter>  <filter-name>CorsFilter</filter-name>  <filter-class>com.omiaozu.manager.filter.CORSFilter</filter-class></filter><filter-mapping>  <filter-name>CorsFilter</filter-name>  <url-pattern>/*</url-pattern></filter-mapping>

上一篇：canvas实现图像截取功能

下一篇：canvas实现动态小球重叠效果