Cors实现java后端完全跨域实例
https://www.nhooo.com/article/114838.htm这篇文章很详细的介绍了JS的跨域，给出的解决方案是springboot的方式，假如不用springboot或者spring版本低于4.2就需要自己实现；
参考了springboot的实现方式，并有所简化，代码如下：
packagecom.lvluo.web.filter.CorsFilter;
importjava.io.IOException;
importjavax.servlet.Filter;
importjavax.servlet.FilterChain;
importjavax.servlet.FilterConfig;
importjavax.servlet.ServletException;
importjavax.servlet.ServletRequest;
importjavax.servlet.ServletResponse;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
importorg.springframework.http.HttpHeaders;
publicclassCorsFilterimplementsFilter{
publicstaticfinalStringACCESS_CONTROL_REQUEST_METHOD="Access-Control-Request-Method";
publicstaticfinalStringOPTIONS="OPTIONS";
publicvoiddoFilter(ServletRequestrequest,ServletResponseresponse,
FilterChainchain)throwsIOException,ServletException{
HttpServletRequesthttpRequest=(HttpServletRequest)request;
HttpServletResponsehttpResponse=(HttpServletResponse)response;
if(isCorsRequest(httpRequest)){
httpResponse.setHeader("Access-Control-Allow-Origin","*");
httpResponse.setHeader("Access-Control-Allow-Methods",
"POST,GET,PUT,DELETE");
httpResponse.setHeader("Access-Control-Allow-Credentials","true");
//response.setIntHeader("Access-Control-Max-Age",1728000);
httpResponse
.setHeader(
"Access-Control-Allow-Headers",
"Origin,X-Requested-With,Content-Type,Accept,Accept-Encoding,Authorization");
if(isPreFlightRequest(httpRequest)){
return;
}
}
chain.doFilter(request,response);
}
publicvoidinit(FilterConfigfilterConfig){
}
publicvoiddestroy(){
}
publicbooleanisCorsRequest(HttpServletRequestrequest){
return(request.getHeader(HttpHeaders.ORIGIN)!=null);
}
/**
*Returns{@codetrue}iftherequestisavalidCORSpre-flightone.
*/
publicbooleanisPreFlightRequest(HttpServletRequestrequest){
return(isCorsRequest(request)&&OPTIONS.equals(request.getMethod())&&request
.getHeader(ACCESS_CONTROL_REQUEST_METHOD)!=null);
}
}
接着在web.xml配置filter即可
corsFilter com.lvluo.web.filter.CorsFilter corsFilter /api/*
前端测试的JS代码，其中客户端的
$.ajax({
headers:{
'Authorization':'BeareriBoxSO9QdrHR0'
},
url:'http://localhost:8080/service/api/ping',
type:'GET',
dataType:'json',
success:function(result){
$("#result").html(result.code);
}
})
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。