1.首先因为服务器端会先发送一个option请求到后台 在后台返回一个post给页面 页面在处理post请求给接口
2.先写一个过滤器, 我们自己定义一个过滤器
package com.adtime.dsp.web.controller;
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.ponent;
/**
* Created by kangb on /5/10.
*/
public class myCORSFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) servletResponse;
String origin = (String) servletRequest.getRemoteHost()+":"+servletRequest.getRemotePort();
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,Authorization");
response.setHeader("Access-Control-Allow-Credentials","true");
filterChain.doFilter(servletRequest, servletResponse);
}
@Override
public void destroy() {
}
}
3.在web.xml里面配置过滤器
cors
com.adtime.dsp.web.controller.myCORSFilter
cors
/*
4.过滤器会自动过滤options请求 然后就可以直接跨域访问接口了
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