Java 与AngularJS和Spring的CORS请求

我知道有很多关于这类问题的信息，但我读到的所有解决方案对我来说都不太合适

所以我要把我的代码留在这里，也许你能知道发生了什么，因为我要把我的电脑扔出窗外

我在单击一个按钮时遇到了这个错误，该按钮触发了对我的rest服务器的Ajax请求：

XMLHttpRequest cannot load http://localhost:8081/XXXXXXX. 
Request header field Access-Control-Allow-Origin is not allowed 
by Access-Control-Allow-Headers in preflight response.

当然，我已经在客户端（AngularJS）将头添加到请求中：

在服务器端，我在web.xml文件中添加了一个过滤器：

 <filter>
    <filter-name>CORSFilter</filter-name>
    <filter-class>
        filters.CORSFilter
    </filter-class>
</filter>
<filter-mapping>
    <filter-name>CORSFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

过滤器会自动将CORS头添加到任何响应中，因此我会将过滤器添加到任何模式中

这是请求和响应头，正如您所看到的，它们有CORS头，但我不太确定发生了什么

响应标题

Access-Control-Allow-Headers:x-requested-with
Access-Control-Allow-Methods:POST, GET, OPTIONS, DELETE
Access-Control-Allow-Origin:*
Access-Control-Max-Age:3600
Allow:GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, PATCH
Content-Length:0
Date:Sat, 28 Nov 2015 08:48:08 GMT
Server:Apache-Coyote/1.1
**Request Headers**
view source
Accept:*/*
Accept-Encoding:gzip, deflate, sdch
Accept-Language:es-ES,es;q=0.8
Access-Control-Request-Headers:accept, access-control-allow-headers, access-control-allow-methods, access-control-allow-origin, x-random-header
Access-Control-Request-Method:GET
Connection:keep-alive
Host:localhost:8081
Origin:http://127.0.0.1:8080
Referer:http://127.0.0.1:8080/
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36

---

我通过restspringapi阅读了一些关于

@CorsOrigin

的内容，但我不知道我没有可用的注释，所以它没有编译。也许我需要在我的POM中添加一个新的特定库？

不要在AngularJS的请求中添加任何标题

只需在web.xml中添加此过滤器，它是一个过滤器： 解释

克斯菲尔特
org.apache.catalina.filters.CorsFilter
克斯菲尔特
/*

这将告诉Tomcat允许CORS请求

package filters;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Component;

@Component
public class CORSFilter implements Filter {

    @Override
    public void init(FilterConfig arg0) throws ServletException {}

    @Override
    public void doFilter(ServletRequest req, ServletResponse resp,
            FilterChain chain) throws IOException, ServletException {
        // TODO Auto-generated method stub
        HttpServletResponse response=(HttpServletResponse) resp;

        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with");

        chain.doFilter(req, resp);
    }

    @Override
    public void destroy() {}

}

Access-Control-Allow-Headers:x-requested-with
Access-Control-Allow-Methods:POST, GET, OPTIONS, DELETE
Access-Control-Allow-Origin:*
Access-Control-Max-Age:3600
Allow:GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, PATCH
Content-Length:0
Date:Sat, 28 Nov 2015 08:48:08 GMT
Server:Apache-Coyote/1.1
**Request Headers**
view source
Accept:*/*
Accept-Encoding:gzip, deflate, sdch
Accept-Language:es-ES,es;q=0.8
Access-Control-Request-Headers:accept, access-control-allow-headers, access-control-allow-methods, access-control-allow-origin, x-random-header
Access-Control-Request-Method:GET
Connection:keep-alive
Host:localhost:8081
Origin:http://127.0.0.1:8080
Referer:http://127.0.0.1:8080/
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36

<filter>
  <filter-name>CorsFilter</filter-name>
  <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>CorsFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>