Javascript CORS阻塞我的后端服务器，如何修复？使用Springboot java作为后端，react js作为前端 import React，{Component}来自“React”； 从“axios”导入axios； 类应用程序扩展组件{ handleSubmit（事件）{ 轴心柱http://localhost:3050/login', { “用户名”：“用户名”， “密码”：“密码” }) .然后（功能（响应）{ 控制台日志（响应）； }) .catch（函数（错误）{ console.log（错误）； }); event.preventDefault（）； } render（）{ 返回( ); } } 导出默认应用程序；

只需将用户名设置为“username”，密码设置为“password”的json检查后端

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我的后端是spring boot，使用带有“用户名”和“密码”的结束链接/登录应该会给出一些响应。因此，这段代码可以工作，除了CORS阻止连接，所以它永远无法处理。我发现的一个解决方案是禁用chrome中的所有安全性，它可以正常工作。但我正在寻找一个永久性的解决方案，而不必禁用chrome设置的安全性。不确定我是通过springboot还是react完成的

尝试在SpringREST端点上使用注释“@CrossOrigin”，在“@RequestMapping”注释上方

例如：-

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在请求POST时，您可能需要以下附加配置：

    @CrossOrigin
    @RequestMapping(value="/login",method=RequestMethod.POST)

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在u配置中创建这个bean

axio({
  method: 'put',
  headers: {
    'Content-Type': 'application/json',
  },
  data: JSON.stringify({
    "username": "username",
    "password": "password"
  }),
});

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请在主spring引导类所在的包中的项目中添加以下文件。这对我在春季开机，反应生态系统的所有CORS问题的工作

 @Bean
public CorsConfigurationSource corsConfigurationSource() {

    final CorsConfiguration configuration = new CorsConfiguration();
    configuration.setAllowedOrigins(ImmutableList.of(
            "http://example.net",
            "http://example.com",
           ));
    configuration.setAllowedMethods(ImmutableList.of("HEAD", "OPTIONS", "GET", "POST", "PUT", "DELETE", "PATCH"));
    configuration.setAllowCredentials(true);
    configuration.setAllowedHeaders(ImmutableList.of("*"));
    configuration.setExposedHeaders(ImmutableList.of("Content-Disposition"));
    configuration.setMaxAge(3600L);

    final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    source.registerCorsConfiguration("/**", configuration);

    return source;
}

答案是从这里开始

 @Bean
public CorsConfigurationSource corsConfigurationSource() {

    final CorsConfiguration configuration = new CorsConfiguration();
    configuration.setAllowedOrigins(ImmutableList.of(
            "http://example.net",
            "http://example.com",
           ));
    configuration.setAllowedMethods(ImmutableList.of("HEAD", "OPTIONS", "GET", "POST", "PUT", "DELETE", "PATCH"));
    configuration.setAllowCredentials(true);
    configuration.setAllowedHeaders(ImmutableList.of("*"));
    configuration.setExposedHeaders(ImmutableList.of("Content-Disposition"));
    configuration.setMaxAge(3600L);

    final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    source.registerCorsConfiguration("/**", configuration);

    return source;
}

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
@EnableWebMvc
public class CorsWebConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**");
        registry.addMapping("/*.html");
    }

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addRedirectViewController("/api/v2/api-docs", "/v2/api-docs");
        registry.addRedirectViewController("/api/swagger-resources/configuration/ui",
                "/swagger-resources/configuration/ui");
        registry.addRedirectViewController("/api/swagger-resources/configuration/security",
                "/swagger-resources/configuration/security");
        registry.addRedirectViewController("/api/swagger-resources", "/swagger-resources");
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/swagger-ui.html**")
                .addResourceLocations("classpath:/META-INF/resources/swagger-ui.html");
        registry.addResourceHandler("/api/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
    }}