#yyds干货盘点# SpringBoot解决跨域问题-CFANZ编程社区

#yyds干货盘点# SpringBoot解决跨域问题

SpringBoot解决跨域问题

创建一个filter解决跨域。

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  @Component

  public class SimpleCORSFilter implements Filter {

      public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {

          HttpServletResponse response = (HttpServletResponse) res;

          response.setHeader("Access-Control-Allow-Origin", "*");

          response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, HEAD");

          response.setHeader("Access-Control-Max-Age", "3600");

          response.setHeader("Access-Control-Allow-Headers", "access-control-allow-origin, authority, content-type, version-info, X-Requested-With");

          chain.doFilter(req, res);

      public void init(FilterConfig filterConfig) {}

      public void destroy() {}

基于WebMvcConfigurerAdapter配置加入Cors的跨域

import org.springframework.context.annotation.Configuration; 
  import org.springframework.web.servlet.config.annotation.CorsRegistry; 
  import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; 
  
  @Configuration 
  public class CorsConfig extends WebMvcConfigurerAdapter { 
  
      @Override 
      public void addCorsMappings(CorsRegistry registry) { 
          registry.addMapping("/**") 
                  .allowedOrigins("*") 
                  .allowCredentials(true) 
                  .allowedMethods("GET", "POST", "DELETE", "PUT") 
                  .maxAge(3600); 
      } 
}

addMapping-----指哪些接口URL需要增加跨域设置

allowedOrigins-----指的是前端哪些域名被允许跨域

allowedMethods-----指的是允许哪些方法

allowCredentials----因为自己项目需要带cookie等凭证，

使用注解@CrossOrigin（局部跨域）

@Controller
  @RequestMapping("/shop")
  @CrossOrigin()
  public class ShopController {
      
      @GetMapping("/")
      @ResponseBody
      public Map<String, Object> findAll() {
          //返回数据
          return DataSchool.getStudents();
      }
}