SpringBoot解决跨域问题

方法一： 创建一个filter解决跨域，此方法也支持springmvc。

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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() {} }

方法二：基于继承WebMvcConfigurerAdapter或者实现WebMvcConfigurer接口配置加入Cors的跨域，此方法常用于springboot。

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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);     } }

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import com.common.constant.TokenConstants; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.CorsRegistry; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;   @Configuration public class WebConfig implements WebMvcConfigurer {     @Override     public void addCorsMappings(CorsRegistry registry) {                 // 设置允许跨域的路由         registry.addMapping("/**")                 // 设置允许跨域请求的域名                 .allowedOriginPatterns("*")                 // 是否允许证书（cookies）                 .allowCredentials(true)                 // 设置允许的方法                 .allowedMethods("*")                 // 跨域允许时间                 .maxAge(3600);     } }

方法三：设置特别控制层允许跨域

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@CrossOrigin(origins = "http://192.168.1.10:8080", maxAge = 3600) @RequestMapping("/index") @RestController public class IndexController{ }

@CrossOrigin这个注解在controller类中使用，就可以指定该controller中所有方法都能处理来自http:19.168.1.10:8080中的请求。