最近项目有原来的jsp转为vue方式,采取的前后端分离的方式,对接过程中出现了跨域的问题,我本想让前端解决下,或者直接让他用jsonp请求,后来考虑到jsonp只能用get的方式,我这边接口的限制是post请求,于是我就在项目中添加了拦截器进行了处理。
在springmvc项目采用的是cors的模式
1、增加fileter
@Component
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() {
}
}
2、需要在web.xml中增加
<filter>
<filter-name>cors</filter-name>
<filter-class>com.xx.os.common.intercepter.myCORSFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>cors</filter-name>
<url-pattern>/api/*</url-pattern>
</filter-mapping>
就可以解决跨域问题了
二、在springboot中添加这个就可以轻松解决了
@Configuration
public class GlobalCorsConfig {
@Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurer() {
@Override
//重写父类提供的跨域请求处理的接口
public void addCorsMappings(CorsRegistry registry) {
//添加映射路径
registry.addMapping("/**")
//放行哪些原始域
.allowedOrigins("*")
//是否发送Cookie信息
.allowCredentials(true)
//放行哪些原始域(请求方式)
.allowedMethods("GET","POST", "PUT", "DELETE")
//放行哪些原始域(头部信息)
.allowedHeaders("*");
// //暴露哪些头部信息(因为跨域访问默认不能获取全部头部信息)
// .exposedHeaders("Header1", "Header2");
}
};
}
}
当然在nginx里面也可以添加请求头,但是我不太喜欢用那种方式,在这就不推荐大家了