本文介绍了spring-boot 允许接口跨域并实现拦截(CORS),分享给大家,也给自己留个笔记
pom.xml(依赖的jar)
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// 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 >
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CORS跨域的配置(主要配置允许什么样的方法跨域)
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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.
*/
@Configuration
public 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);
}
}
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拦截器配置(可以根据不同路径,配置不同的拦截器)
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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" );
}
}
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拦截器管理类,用于生成项目的拦截器链
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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
*/
@Configuration
public 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);
}
}
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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!
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://www.jianshu.com/p/db0d8d45c242?utm_source=tuicool&utm_medium=referral