标签:template integer contex object ref let autoconf context string
首先导入springboot 的 web 包
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency>
restTemplateBuilder的方式被废弃,就推荐使用。
@Configuration public class AppConfig { @Bean public RestTemplate restTemplate(RestTemplateBuilder restTemplateBuilder) { return restTemplateBuilder .setConnectTimeout(...) .setReadTimeout(...) .build(); } }
在启动类同包下创建RestTemplate.java类:
import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.MediaType; import org.springframework.http.client.SimpleClientHttpRequestFactory; import org.springframework.http.converter.HttpMessageConverter; import org.springframework.http.converter.StringHttpMessageConverter; import org.springframework.web.client.RestTemplate; import java.nio.charset.Charset; import java.util.ArrayList; import java.util.List; /** * @author wangcanfeng * @time 2019/3/6 * @function 远程调用rest接口客户端注册 **/ @Configuration public class RestTemplateAutoConfiguration { //连接超时时间 @Value("${rest.connection.timeout}") private Integer connectionTimeout; // 信息读取超时时间 @Value("${rest.read.timeout}") private Integer readTimeout; /** * 功能描述:注册restTemplate服务 * * @param * @author wangcanfeng * @time 2019/3/6 20:26 * @since v1.0 **/ @Bean public RestTemplate registerTemplate() { RestTemplate restTemplate = new RestTemplate(getFactory()); //这个地方需要配置消息转换器,不然收到消息后转换会出现异常 restTemplate.setMessageConverters(getConverts()); return restTemplate; } /** * 功能描述: 初始化请求工厂 * * @param * @author wangcanfeng * @time 2019/3/6 20:27 * @since v1.0 **/ private SimpleClientHttpRequestFactory getFactory() { SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory(); factory.setConnectTimeout(connectionTimeout); factory.setReadTimeout(readTimeout); return factory; } /** * 功能描述: 设置数据转换器,我再这里只设置了String转换器 * * @param * @author wangcanfeng * @time 2019/3/6 20:32 * @since v1.0 **/ private List<HttpMessageConverter<?>> getConverts() { List<HttpMessageConverter<?>> messageConverters = new ArrayList<>(); // String转换器 StringHttpMessageConverter stringConvert = new StringHttpMessageConverter(); List<MediaType> stringMediaTypes = new ArrayList<MediaType>() {{ //配置text/plain和text/html类型的数据都转成String add(new MediaType("text", "plain", Charset.forName("UTF-8"))); add(MediaType.TEXT_HTML); }}; stringConvert.setSupportedMediaTypes(stringMediaTypes); messageConverters.add(stringConvert); return messageConverters; } }
然后在Service类中注入使用即可
@Service public class demoService { @Autowired private RestTemplate restTemplate; public String get(Integer id){ return restTemplate.getForObject("http://localhost:8080/user?userId=id",String.class); } }
RestTemplate定义了36个与REST资源交互的方法,其中的大多数都对应于HTTP的方法。
其实,这里面只有11个独立的方法,其中有十个有三种重载形式,而第十一个则重载了六次,这样一共形成了36个方法。
get请求就和正常在浏览器url上发送请求一样
下面是有参数的get请求
@GetMapping("getForEntity/{id}") public User getById(@PathVariable(name = "id") String id) { ResponseEntity<User> response = restTemplate.getForEntity("http://localhost/get/{id}", User.class, id); User user = response.getBody(); return user; }
getForObject 和 getForEntity 用法几乎相同,指示返回值返回的是 响应体,省去了我们 再去 getBody()
@GetMapping("getForObject/{id}") public User getById(@PathVariable(name = "id") String id) { User user = restTemplate.getForObject("http://localhost/get/{id}", User.class, id); return user; }
@RequestMapping("saveUser") public String save(User user) { ResponseEntity<String> response = restTemplate.postForEntity("http://localhost/save", user, String.class); String body = response.getBody(); return body; }
用法与 getForObject 一样
如果遇到 postForObject 方法在 Controller 接受不到参数问题 请参考的的另一篇博客 :
https://www.cnblogs.com/deityjian/p/12513377.html
@PostMapping("demo") public void demo(Integer id, String name){ HttpHeaders headers = new HttpHeaders();//header参数 headers.add("authorization",Auth); headers.setContentType(MediaType.APPLICATION_JSON); JSONObject obj = new JSONObject();//放入body中的json参数 obj.put("userId", id); obj.put("name", name); HttpEntity<JSONObject> request = new HttpEntity<>(content,headers); //组装 ResponseEntity<String> response = template.exchange("http://localhost:8080/demo",HttpMethod.POST,request,String.class); }
package smartt.styy.auth.util; import java.net.URI; import java.nio.charset.Charset; import com.alibaba.fastjson.JSONObject; import org.springframework.core.ParameterizedTypeReference; import org.springframework.http.HttpEntity; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpMethod; import org.springframework.http.MediaType; import org.springframework.http.RequestEntity; import org.springframework.http.ResponseEntity; import org.springframework.stereotype.Component; import org.springframework.util.LinkedMultiValueMap; import org.springframework.util.MimeType; import org.springframework.util.MimeTypeUtils; import org.springframework.util.MultiValueMap; import org.springframework.util.StringUtils; import org.springframework.web.client.RestTemplate; import org.springframework.web.util.UriComponentsBuilder; @Component public class ExternalCallUtils { //统一,认证服务接口调用post @SuppressWarnings({ "rawtypes", "unchecked" }) public static String restRequest(Object reqParam,Boolean needHeader,String Headers,HttpMethod method, String url) throws Exception{ try { HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.APPLICATION_JSON); //设置token值 if(needHeader) { headers.add("Authorization", Headers); } RequestEntity request = null ; if(null != reqParam) { request = new RequestEntity(reqParam,headers, method, new URI(url)); }else { request = new RequestEntity(headers, method, new URI(url)); } RestTemplate rest =new RestTemplate(); ResponseEntity<String> resp = rest.exchange(request, new ParameterizedTypeReference<String>(){}); System.out.println("resp status:"+resp.getStatusCode()); if(resp.getStatusCode()!=null && resp.getStatusCodeValue() ==200) { return resp.getBody(); } } catch (Exception e) { throw new Exception("认证服务失败!"); } return null; } //put delete ,obj为请求实体,转json public static <T> T restPutRequest(Object obj, String url,String token, HttpMethod method, Class<T> bodyType) throws Exception{ // 请求头 HttpHeaders headers = new HttpHeaders(); MimeType mimeType = MimeTypeUtils.parseMimeType("application/json"); MediaType mediaType = new MediaType(mimeType.getType(), mimeType.getSubtype(), Charset.forName("UTF-8")); // 请求体 headers.setContentType(mediaType); //提供json转化功能 //ObjectMapper mapper = new ObjectMapper(); if(!StringUtils.isEmpty(token)){ headers.add("Authorization", token); } String jsonStr = JSONObject.toJSONString(obj); // 发送请求 HttpEntity<String> entity = new HttpEntity<>(jsonStr, headers); RestTemplate restTemplate = new RestTemplate(); ResponseEntity<T> resultEntity = restTemplate.exchange(url, method, entity, bodyType); return resultEntity.getBody(); } //get public static <T> T restGetRequest(Class<T> bodyType,String url,String token, HttpMethod method) throws Exception{ HttpHeaders headers = new HttpHeaders(); MimeType mimeType = MimeTypeUtils.parseMimeType("application/json"); MediaType mediaType = new MediaType(mimeType.getType(), mimeType.getSubtype(), Charset.forName("UTF-8")); // 请求体 headers.setContentType(mediaType); //提供json转化功能 //ObjectMapper mapper = new ObjectMapper(); if(!StringUtils.isEmpty(token)){ headers.add("Authorization", token); } HttpEntity<String> entity = new HttpEntity<>(null, headers); RestTemplate restTemplate = new RestTemplate(); ResponseEntity<T> resultEntity = restTemplate.exchange(url,method,entity,bodyType); return resultEntity.getBody(); } }
springboot 2.0 整合 RestTemplate
标签:template integer contex object ref let autoconf context string
原文地址:https://www.cnblogs.com/deityjian/p/12513224.html