使用Spring CROS解决项目中的跨域问题详解

使用Spring CROS解决项目中的跨域问题详解

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

impAPZFZzort 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

@EnableWebMvc

public class SpringWebConfig extends WebMvcConfigurerAdapter {

/**

* {@inheritDoc}

*

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

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:mvc="http://springframework.org/schema/mvc"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/mvc

http://springframework.org/schema/mvc/spring-mvc.xsd">

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" />

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:mvc="http://springframework.org/schema/mvc"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/mvc

http://springframework.org/schema/mvc/spring-mvc.xsd">

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" />

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" />

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