web项目中，跨域问题
本来前后端项目是不存在跨域的，但是是前后端配合的，便有了跨域的问题【web项目中，跨域问题】感谢原博主
百度中遇到一个很好的帖子，并且正确可用，边记录下来，以便后用
转载 https://blog.csdn.net/lmy86263/article/details/51724221自己在几个项目中，解决跨域的方法就是添加一个filter: CorsFilter
转载 https://www.cnblogs.com/slowcity/p/9293498.html
package com.basetnt.bss.filter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@Component
public class CorsFilter implements Filter {
private final static Logger logger = LoggerFactory.getLogger(CorsFilter.class);
@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT");
response.setHeader("Access-Control-Max-Age", "36000");
response.setHeader("Access-Control-Allow-Headers", "Authorization");
response.setHeader("Access-Control-Expose-Headers", "*");
logger.debug("*********************************过滤器被使用**************************");
chain.doFilter(req, res);
}@Override
public void init(FilterConfig filterConfig) {}@Override
public void destroy() {}
}
