spring-boot 允许接口跨域并实现拦截

pom.xml(依赖的jar)

// 在spring-boot-starter-web的启动器中，已经依赖好了<dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId></dependency>

跨域的配置（主要配置允许什么样的方法跨域）

import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.web.cors.CorsConfiguration;import org.springframework.web.cors.UrlBasedCorsConfigurationSource;import org.springframework.web.filter.CorsFilter;import org.springframework.web.servlet.config.annotation.CorsRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;import java.util.ArrayList;import java.util.List;/** * Created by Msater Zg on 2017/4/3. */@Configurationpublic class CorsConfig extends WebMvcConfigurerAdapter {    @Override    public void addCorsMappings(CorsRegistry registry) {        registry.addMapping("/**")                .allowedOrigins("*")                .allowCredentials(true)                .allowedMethods("GET", "POST", "DELETE", "PUT")                .maxAge(3600);    }    private CorsConfiguration buildConfig() {        CorsConfiguration corsConfiguration = new CorsConfiguration();        List<String> list = new ArrayList<>();        list.add("*");        corsConfiguration.setAllowedOrigins(list);        /*        // 请求常用的三种配置，*代表允许所有，当时你也可以自定义属性（比如header只能带什么，只能是post方式等等）        */        corsConfiguration.addAllowedOrigin("*");          corsConfiguration.addAllowedHeader("*");         corsConfiguration.addAllowedMethod("*");          return corsConfiguration;    }    @Bean    public CorsFilter corsFilter() {        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();        source.registerCorsConfiguration("/**", buildConfig());        return new CorsFilter(source);    }}

拦截器配置(可以根据不同路径，配置不同的拦截器)

import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * Created by Msater Zg on 2017/4/5. * 拦截器 */public class ApiInterceptor implements HandlerInterceptor {    @Override    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {        // 请求前调用        System.out.println("拦截了");        return true;    }    @Override    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {        // 请求过程中调用        System.out.println("拦截了");    }    @Override    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {        // 请求完成时调用        System.out.println("拦截了");    }}

拦截器管理类，用于生成项目的拦截器链

import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.InterceptorRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;/** * Created by Msater Zg on 2017/4/5. * 拦截器管理工具 */@Configurationpublic class MyWebAppConfigurer extends WebMvcConfigurerAdapter {    @Override    public void addInterceptors(InterceptorRegistry registry) {        // 多个拦截器组成一个拦截器链        // addPathPatterns 用于添加拦截规则        // excludePathPatterns 用户排除拦截        registry.addInterceptor(new ApiInterceptor()).addPathPatterns("/user/**");  //对来自/user/** 这个链接来的请求进行拦截        super.addInterceptors(registry);    }}

结语

实现跨域的方式有很多，这只是其中一种。有什么不对的地方希望能及时指出。谢谢！