# SpringBoot全局跨域设置
# 方法一
使用注解对接口进行跨域设置
@CrossOrigin(origins = "*", maxAge = 3600)
@RestController
@RequestMapping("/test")
public class TestController {
@GetMapping("get")
public String get() {
// ...
}
}
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这种方式不算全局设置，需要自己在对应的Controller中加入注解
# 方法二
直接实现WebMvcConfigurer
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpHeaders;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
* @author Administrator
*/
@Configuration
public class CorsConfig implements WebMvcConfigurer {
@Bean
public WebMvcConfigurer corsConfigurer()
{
return new WebMvcConfigurer() {
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**").
allowedOrigins("*"). //允许跨域的域名，可以用*表示允许任何域名使用
allowedMethods("*"). //允许任何方法（post、get等）
allowedHeaders("*"). //允许任何请求头
allowCredentials(true). //带上cookie信息
exposedHeaders(HttpHeaders.SET_COOKIE).maxAge(3600L); //maxAge(3600)表明在3600秒内，不需要再发送预检验请求，可以缓存该结果
}
};
}
}
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# 方法三
实现一个过滤器Filter
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* @author Administrator
*/
@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
public class MyCorsFilter implements Filter {
public MyCorsFilter() {
}
@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
HttpServletRequest request = (HttpServletRequest) req;
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "Content-Type,x-requested-with, authorization");
if ("OPTIONS".equalsIgnoreCase(request.getMethod())) {
response.setStatus(HttpServletResponse.SC_OK);
} else {
chain.doFilter(req, res);
}
}
@Override
public void init(FilterConfig filterConfig) {
}
@Override
public void destroy() {
}
}
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我在项目中使用Token认证，因此需要对header 请求进行设置，例如方法三中
response.setHeader("Access-Control-Allow-Headers", "Content-Type,x-requested-with, authorization");
设置authorization允许请求，以及设置Content-Type允许请求，这样前台使用token，用表单或json请求都不会出现跨域问题