配置类
@Configuration
public class CorsConfiguration {
@Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurer() {
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**");
}
};
}
}
前端请求
![](https://img2018.cnblogs.com/i-beta/1536016/201911/1536016-20191107100922964-2116768025.png)
错误原因:SpringBoot默认跨域方法只支持HEAD,GET,POST
配置类修改后
@Configuration
public class CorsConfiguration {
@Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurer() {
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedOrigins("*")
.allowCredentials(true)
.allowedMethods("GET", "POST", "PUT", "DELETE");
}
};
}
}
附相关SpringBoot部分源码
//package org.springframework.web.cors.CorsConfiguration
/** Wildcard representing <em>all</em> origins, methods, or headers. */
public static final String ALL = "*";
private static final List<HttpMethod> DEFAULT_METHODS = Collections.unmodifiableList(
Arrays.asList(HttpMethod.GET, HttpMethod.HEAD));
private static final List<String> DEFAULT_PERMIT_METHODS = Collections.unmodifiableList(
Arrays.asList(HttpMethod.GET.name(), HttpMethod.HEAD.name(), HttpMethod.POST.name()));
private static final List<String> DEFAULT_PERMIT_ALL = Collections.unmodifiableList(
Collections.singletonList(ALL));
public CorsConfiguration applyPermitDefaultValues() {
if (this.allowedOrigins == null) {
this.allowedOrigins = DEFAULT_PERMIT_ALL;
}
if (this.allowedMethods == null) {
this.allowedMethods = DEFAULT_PERMIT_METHODS;
this.resolvedMethods = DEFAULT_PERMIT_METHODS
.stream().map(HttpMethod::resolve).collect(Collectors.toList());
}
if (this.allowedHeaders == null) {
this.allowedHeaders = DEFAULT_PERMIT_ALL;
}
if (this.maxAge == null) {
this.maxAge = 1800L;
}
return this;
}