在使用openfeign做表单提交时，HttpServletRequest传参后服务端接收不到数据的问题

Posted 2021-12-06 我叫白小飞

直接上解决办法吧。

    @PostMapping("/xxxx")
    public Object xxxx(HttpServletRequest request) {
    	// 这里需要取出来，然后直接用参数，并且map的限定是string和 ？，一定要注意
        Map<String, ?> parameterMap = request.getParameterMap();
        return xxxx.xxxx(parameterMap);
    }

service的写法，主要是设置参数类型。

    @PostMapping(value = "/xxx",consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    ResponseWrapper xxx(Map<String, ?> parameterMap);

还有就是feign的配置：

/**
 * @version 1.0.0
 * @ClassName FeignConf.java
 * @Package 
 * @Author Joker
 * @Description feigen配置
 * @CreateTime 2021年04月08日 14:29:00
 */
@Configuration
public class FeignConf implements RequestInterceptor {
    private final ObjectFactory<HttpMessageConverters> messageConverters;

    public FeignConf(ObjectFactory<HttpMessageConverters> messageConverters) {
        this.messageConverters = messageConverters;
    }

	// 这一步就是设置参数的
    @Bean
    @Primary
    @Scope("prototype")
    public Encoder feignEncoder() {
        return new SpringFormEncoder(new SpringEncoder(messageConverters));
    }
    @Bean
    public Retryer feignRetarder(){
        return new Retryer.Default(100,SECONDS.toMillis(1),5);
    }

    @Bean
    Logger.Level feignLoggerLevel() {
        return Logger.Level.FULL;
    }

    @Override
    public void apply(RequestTemplate template) {
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
                .getRequestAttributes();
        assert attributes != null;
        HttpServletRequest request = attributes.getRequest();
        Enumeration<String> headerNames = request.getHeaderNames();
        if (headerNames != null) {
            while (headerNames.hasMoreElements()) {
                String name = headerNames.nextElement();
                String values = request.getHeader(name);
                template.header(name, values);
            }
        }
        Enumeration<String> bodyNames = request.getParameterNames();
        Request.Body body = template.requestBody();
        Map<String,Object> map = new HashMap<>(16);
        if (bodyNames != null) {
            while (bodyNames.hasMoreElements()) {
                String name = bodyNames.nextElement();
                String values = request.getParameter(name);
                map.put(name,values);
            }
            body.expand(map);
        }
        template.body(body);
    }
}