Spring Boot项目设置跨域

一、跨域设置

新建一个配置类

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;

import org.apache.commons.lang3.StringUtils;

/**
 * @author wangshida
 * @datetime 2023-02-15 上午11:20
 * @desc 跨域
 * @menu
 */
public class CorsFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse httpResponse = (HttpServletResponse) response;
        HttpServletRequest httpRequest = (HttpServletRequest) request;
        String originHeader = httpRequest.getHeader("Origin");
        //允许某个域名发起跨域请求
        httpResponse.addHeader("Access-Control-Allow-Origin", StringUtils.isEmpty(originHeader)?"*":originHeader);
        //设置允许Cookie
        httpResponse.addHeader("Access-Control-Allow-Credentials", "true");
        //设置允许跨域请求的方法
        httpResponse.addHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        //允许跨域请求包含content-type
        httpResponse.addHeader("Access-Control-Allow-Headers", "Origin,X-Requested-With,Content-Type,Accept,X-Token");
        //表示可以缓存时长，单位秒，表示隔30分钟才发起预检请求
        httpResponse.addHeader("Access-Control-Max-Age", "3600");
        //跨域的预检请求直接返回
        if ("OPTIONS".equals(httpRequest.getMethod())) {
            response.getWriter().println("ok");
            return;
        }
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
    }
}

新增FilterConfig

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author wangshida
 * @datetime 2023-02-15 上午11:20
 * @desc
 * @menu
 */
@Configuration
public class FilterConfig {
    /**
     * 跨域设置
     */
    @Bean
    public FilterRegistrationBean corsFilter() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new CorsFilter());
        registration.addUrlPatterns("/*");
        return registration;
    }
}