Spring MVC 跨域

在写Spring MVC项目的时候，有时候会出现跨域访问的问题，下面介绍一种解决跨域访问问题的方法。
1.建立CorsFilter类，并实现Filter接口

package cn.edu.bupt.springmvc.web.config;import javax.servlet.*;import javax.servlet.http.HttpServletResponse;import java.io.IOException;/** * TODO: * * @author: 林贻民 * @date: 2017.10.25 * @Description: 允许跨域访问 */public class CorsFilter implements Filter {    @Override    public void init(FilterConfig filterConfig) throws ServletException {    }    @Override    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {        HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;        httpResponse.addHeader("Access-Control-Allow-Origin", "*");        httpResponse.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");        httpResponse.setHeader("Access-Control-Allow-Methods", "GET, PUT, DELETE, POST");        filterChain.doFilter(servletRequest, servletResponse);    }    @Override    public void destroy() {    }}

2.在web.xml中添加filter

<!-- 支持跨域 -->    <filter>        <filter-name>CorsFilter</filter-name>        <filter-class>cn.edu.bupt.springmvc.web.config.CorsFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>CorsFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>

这样就可以解决跨域问题了。