1. 在Spring-boot的后端代码中添加以下配置，允许跨域访问：

@Configuration public class WebConfig extends WebMvcConfigurerAdapter {

@Override
public void addCorsMappings(CorsRegistry registry) {
    registry.addMapping("/**").allowedOrigins("*").allowedMethods("GET", "POST","PUT", "DELETE");
}

}

2. 在Angular的client端代码中添加以下配置，允许跨域访问：

import { HttpClientModule } from '@angular/common/http'; import { Injectable, NgModule } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { AppComponent } from './app.component'; import { HttpService } from './http.service';

@NgModule({ declarations: [AppComponent], imports: [BrowserModule, HttpClientModule], providers: [HttpService], bootstrap: [AppComponent], }) export class AppModule {}

@Injectable() export class HttpService { constructor(private http: HttpClient) {} get(url: string, headers?: any) { const options = headers ? { headers: headers, } : {}; return this.http.get(url, options).toPromise(); }

post(url: string, data: any, headers?: any) { const options = headers ? { headers: headers, } : {}; return this.http.post(url, data, options).toPromise(); }

put(url: string, data: any, headers?: any) { const options = headers ? { headers: headers, } : {}; return this.http.put(url, data, options).toPromise(); }

delete(url: string, headers?: any) { const options = headers ? { headers: headers, } : {}; return this.http.delete(url, options).toPromise(); } }

3. 如果配置后仍然存在CORS错误，则可以使用CORS插件，如CORS Everywhere或Disable CORS插件来解决问题。