JS跨域请求外部服务器的资源
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
packagecom.soft.filter;
/**
*CreatedbyAdministratoron2017/2/6.
*/
importjavax.servlet.*;
importjavax.servlet.http.HttpServletResponse;
importjava.io.IOException;
publicclassCORSFilterimplementsFilter{
@Override
publicvoidinit(FilterConfigfilterConfig)throwsServletException{
}
@Override
publicvoiddoFilter(ServletRequestservletRequest,ServletResponseservletResponse,FilterChainfilterChain)throwsIOException,ServletException{
HttpServletResponsehttpResponse=(HttpServletResponse)servletResponse;
httpResponse.addHeader("Access-Control-Allow-Origin","*");
filterChain.doFilter(servletRequest,servletResponse);
}
@Override
publicvoiddestroy(){
}
}
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>