No HttpMessageConverter for java.util.HashMap and content type application/x-www-form-urlencoded

是因为用了HashMap来作为body传递 解析转换不了，换成 MultiValueMap就ok了。

收工

！！getParams实现

/**
 * 基本消息转换器

 * @Author xxx
 * @Date 2020-03-11
 */
public class BasicMessageConvert implements HttpMessageConvert {

    private HttpServletRequest request;


    public BasicMessageConvert(HttpServletRequest request) {
        this.request = request;
    }

    @Override
    public MultiValueMap getParams() {
        MultiValueMap ret = new LinkedMultiValueMap();
        Map<String,String[]> map = request.getParameterMap();
        for(Iterator<Map.Entry<String, String[]>> itr = map.entrySet().iterator(); itr.hasNext();){
            Map.Entry<String, String[]> entry = itr.next();
            String key = entry.getKey();
            String[] value = entry.getValue();
            ret.put(key, new ArrayList(Arrays.asList(value[0])));
        }
        // 提取params参数
        extractParams(ret);
        return ret;
    }
}