CROS(Cross-Origin Resource Sharing) 用于解决浏览器中跨域请求的问题。简单的Get请求可以使用JSONP来解决，而对于其它复杂的请求则需要后端应用的支持CROS。Spring在4.2版本之后提供了@CrossOrigin 注解来实现对Cross的支持。
在Controller方法上配置
@CrossOrigin(origins = {"http://loaclhost:8088"})@RequestMapping(value = "/crossTest",method = RequestMethod.GET)public String greeting() { return "corss test";}
在Controller上配置，那么这个Controller中的所有方法都会支持CORS
import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.CrossOrigin;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;@CrossOrigin(origins = "http://localhost:8088",maxAge = 3600)@Controller@RequestMapping("/api")public class AppController { @RequestMapping(value = "/crossTest",method = RequestMethod.GET) public String greeting() { return "corss test"; }}
Java Config全局配置
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.WebMvcConfigurerAdapter;@Configuration@EnableWebMvcpublic class SpringWebConfig extends WebMvcConfigurerAdapter { /** * {@inheritDoc} * <p>This implementation is empty. * * @param registry */ @Override public void addCorsMappings(CorsRegistry registry) { super.addCorsMappings(registry); // 对所有的URL配置 registry.addMapping("/**"); // 针对某些URL配置 registry.addMapping("/api/**").allowedOrigins("http:///localhost:8088") .allowedMethods("PUT","DELETE") .allowedHeaders("header1","header2","header3") .exposedHeaders("header1","header2") .allowCredentials(false).maxAge(3600); }}
XML全局配置
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <mvc:cors> <!--<mvc:mapping path=""/>--> <mvc:mapping path="/api/**" allowed-origins="http://localhost:8088,http://localhost:8888" allowed-methods="GET,PUT" allowed-headers="header1,header2" exposed-headers="header1,header2" allow-credentials="false" max-age="3600" /> </mvc:cors></beans>
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