Spring RestTemplate关联HttpClient4.5的配置HttpClient和自身的BUG

如题 ,本博客将解决RestTemplate 的配置问题 ,同时告知其存在的BUG

写作背景:

我们知道HttpClient要想使用PATCH, PUT等请求 配置将相当麻烦, 当结合RestTemplate后就会变得十分简单. 那么如何进行结合?

<本文基于SpringBoot框架, 相关Spring也可以进行参考设计>

现在进行示例说明:

1.配置方法:

import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.client.ClientHttpRequestFactory; import org.springframework.http.client.HttpComponentsClientHttpRequestFactory; import org.springframework.web.client.RestTemplate; /** * @author yuton * @version 1.0 * @description * @since 2017/5/30 13:31 */ @Configuration public class HttpClientRestConfig { @Bean public ClientHttpRequestFactory clientHttpRequestFactory() { HttpComponentsClientHttpRequestFactory clientHttpRequestFactory = new HttpComponentsClientHttpRequestFactory(); clientHttpRequestFactory.setHttpClient(HttpsClientPoolThread.builder().createSSLClientDefault()); //这里是使用了自定义的一个HttpsClientPoolThread线程池单例 以后有机会会单独写文章展示其配置内容, 大家可以先使用默认的HttpClients.createDefault()进行配置,或自定义线程池; clientHttpRequestFactory.setConnectTimeout(10000); clientHttpRequestFactory.setReadTimeout(10000); clientHttpRequestFactory.setConnectionRequestTimeout(200); return clientHttpRequestFactory; } @Bean public RestTemplate restTemplate() { return new RestTemplate(clientHttpRequestFactory()); } }

2.使用方法:

@Resource private CopyWriteUI copyWriteUI; @Resource private I18nMessageUI i18nMessageUI; @Resource private RestTemplate restTemplate; @Override public IResult callPolice(String imei, String onOff) { String url = copyWriteUI.getSocketUrl() + APITable.CALL_POLICE_WATCH .replace("{imei}", imei) .replace("{onOff}", onOff); IResult result = restTemplate.patchForObject(url, null, Result.class); if (null == result) { return CommonTools.errorResult(ResultMessage.ERROR_PROMPT, i18nMessageUI.getNetworkAnomaly()); } if (result.isSuccessful()) { return CommonTools.successResult(ResultMessage.STATUS_SUCCESS); } return CommonTools.errorResult(ResultMessage.ERROR_PROMPT, i18nMessageUI.getNetworkAnomaly()); } @Override public IResult setWatchStepTime(String imei, String times) { String url = copyWriteUI.getSocketUrl() + APITable.SET_WATCH_STEP_TIME.replace("{imei}", imei); MultiValueMap<String, String> multiValueMap = new LinkedMultiValueMap<>(); multiValueMap.add("times", times); IResult result = restTemplate.postForObject(url, multiValueMap, Result.class); if (null == result) { return CommonTools.errorResult(ResultMessage.ERROR_PROMPT, i18nMessageUI.getNetworkAnomaly()); } if (result.isSuccessful()) { return CommonTools.successResult(ResultMessage.STATUS_SUCCESS); } return CommonTools.errorResult(ResultMessage.ERROR_PROMPT, i18nMessageUI.getNetworkAnomaly()); }

在这里 要说明下:

post put patch等请求 参数必须使用MultiValueMap进行接收和传递,否则 参数会为空!get请求,如果需要使用Map传递参数,那么该Map一定不能是MultiValueMap! 否则, 传递的参数会附带上’[]’!