直接在Controller类或方法前加上@CrossOrigin注解即可允许所有ip跨域访问
加在Controller类上表示该Controller的所有方法都支持跨域
加在Controller中的方法上表示仅该方法支持跨域
@CrossOrigin // 允许所有ip跨域
@CrossOrigin(origins = "192.168.0.1") //只允许指定ip跨域
1、引入pom.xml依赖
com.thetransactioncompany
cors-filter
2.5
2、在web.xml文件中注册Filter跨域过滤器
CORS
com.thetransactioncompany.cors.CORSFilter
cors.allowOrigin
*
cors.supportedMethods
GET, POST, HEAD, PUT, DELETE
cors.supportedHeaders
Accept, Origin, X-Requested-With, Content-Type, Last-Modified
cors.exposedHeaders
Set-Cookie
cors.supportsCredentials
true
CORS
/*
1、写CrossingFilter过滤器类,实现(Interfaces)本地Apache Tomcat的Filter接口
package com.pmsapi.filter;
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.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class CrossingFilter implements Filter {
private boolean isCross = false;
@Override
public void destroy() {
isCross = false;
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
if (isCross) {
HttpServletRequest httpServletRequest = (HttpServletRequest) request;
HttpServletResponse httpServletResponse = (HttpServletResponse) response;
System.out.println("拦截请求: " + httpServletRequest.getServletPath());
httpServletResponse.setHeader("Access-Control-Allow-Origin", "*");
// httpServletResponse.setHeader("Access-Control-Allow-Methods", "*"); // 表示所有请求都有效
httpServletResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
httpServletResponse.setHeader("Access-Control-Max-Age", "0");
httpServletResponse.setHeader("Access-Control-Allow-Headers",
"Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token");
httpServletResponse.setHeader("Access-Control-Allow-Credentials", "true");
httpServletResponse.setHeader("XDomainRequestAllowed", "1");
}
chain.doFilter(request, response);
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
String isCrossStr = filterConfig.getInitParameter("IsCross");
isCross = isCrossStr.equals("true") ? true : false;
System.out.println("跨域开启状态:" + isCrossStr);
}
}
2、在web.xml文件中注册CrossingFilter过滤器
CrossingFilter
com.pmsapi.filter.CrossingFilter
IsCross
true
CrossingFilter
/*