RestTemplate Get请求实现bean参数传递详解

Map<String,Object> param = new HashMap<String,Object>();
param.put("since",10);
restTemplate.getForObject("https://api.github.com/users" , UserDto.class, param);

Map<String,Object> param = new HashMap<String,Object>();
param.put("since",10);
restTemplate.getForObject("https://api.github.com/users?since={since}" , UserDto.class, param);

package com.example.resttemplate.configuration;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.util.DefaultUriBuilderFactory;
import org.springframework.web.util.UriComponentsBuilder;
import org.springframework.web.util.UriTemplateHandler;
import java.net.URI;
import java.util.Map;
@Slf4j
public class RestGetUriTemplateHandler implements UriTemplateHandler {
    private UriTemplateHandler uriTemplateHandler = new DefaultUriBuilderFactory();
    @Override
    public URI expand(String uriTemplate, Map<String, ?> uriVariables) {
    	// 使用UriComponentsBuilder 构建请求的链接，也是拼参数的方法
        UriComponentsBuilder builder = UriComponentsBuilder
                .fromHttpUrl(uriTemplate);
        for (Map.Entry<String, ?> entry : uriVariables.entrySet()) {
            builder.queryParam(entry.getKey(), entry.getValue());
        }
        String uriString = builder.toUriString();
        log.info("uriString:[{}]" , uriString);
        return uriTemplateHandler.expand(uriString , uriVariables);
    }
    @Override
    public URI expand(String uriTemplate, Object... uriVariables) {
        return uriTemplateHandler.expand(uriTemplate, uriVariables);
    }
}

restTemplate.setUriTemplateHandler(new RestGetUriTemplateHandler());
Map<String,Object> param = BeanUtil.beanToMap(queryDto);
restTemplate.getForObject("https://api.github.com/users/mojombo", UserDto.class , param);

Map<String, String> paramMap = BeanUtilsBean.getInstance().describe(bean);