RestTemplate 详解 http get post请求样例

我不是女神ヾ 2022-05-19 00:40 200阅读 0赞

以下是请求样例：

RestTemplate 配置：

package cn.rojao.config;

import java.util.ArrayList;  
import java.util.List;  
import org.apache.http.Header;  
import org.apache.http.conn.HttpClientConnectionManager;  
import org.apache.http.impl.client.CloseableHttpClient;  
import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;  
import org.apache.http.impl.client.HttpClientBuilder;  
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;  
import org.apache.http.message.BasicHeader;  
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;

/\*\*  
 \*   
 \* RestTemplate配置类  
 \*   
 \* @author  lk  
 \* @email   lk@qq.com  
 \* @version 创建时间：2018年6月7日 上午10:26:22  
 \*/  
@Configuration   
public class RestTemplateConfig \{  
      
    @Bean  
    public RestTemplate restTemplate(ClientHttpRequestFactory factory)\{  
        return new RestTemplate(factory);  
    \}

@Bean  
    public ClientHttpRequestFactory simpleClientHttpRequestFactory(CloseableHttpClient httpClient)\{  
        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory(httpClient);  
        factory.setReadTimeout(1800000);//单位为ms,30分钟分钟  
        factory.setConnectTimeout(180000);//单位为ms,3分钟  
        factory.setConnectionRequestTimeout(900000);//获取连接时间15分钟  
        return factory;  
    \}  
      
    @Bean  
    public HttpClientBuilder httpClientBuilder(HttpClientConnectionManager connectionManager) \{  
        HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();  
        httpClientBuilder.setConnectionManager(connectionManager);  
        httpClientBuilder.setRetryHandler(new DefaultHttpRequestRetryHandler(3,true));//重试次数，默认三次  
        List<Header> defaultHeaders = new ArrayList<Header>();  
        defaultHeaders.add(new BasicHeader("Content-Type", "text/plain;charset=UTF-8"));  
        httpClientBuilder.setDefaultHeaders(defaultHeaders);  
        return httpClientBuilder;  
          
    \}  
      
    @Bean  
    public CloseableHttpClient httpClient(HttpClientBuilder httpClientBuilder) \{  
        CloseableHttpClient httpClient = httpClientBuilder.build();  
        return httpClient;  
    \}  
      
    @Bean  
    public HttpClientConnectionManager httpClientConnectionManager() \{  
        PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager();  
        connectionManager.setMaxTotal(800);  
        connectionManager.setDefaultMaxPerRoute(500);  
        return connectionManager;  
    \}  
\}

RestTemplate 使用实例：

package cn.rojao.config;

import java.util.HashMap;  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.http.HttpEntity;  
import org.springframework.http.HttpHeaders;  
import org.springframework.http.ResponseEntity;  
import org.springframework.scheduling.annotation.Scheduled;  
import org.springframework.stereotype.Component;  
import org.springframework.web.client.RestTemplate;  
import cn.rojao.entity.User;  
import cn.rojao.util.JsonChangeUtil;

@Component  
public class schedule \{  
    @Autowired  
    RestTemplate restTemplate;  
      
      
    @Scheduled(fixedDelay = 3000)  
    public void restTest()\{  
        String url = "http://10.10.1.77:9091/";  
        String url1 = "http://10.10.1.77:9091/\{ceshi\}";  
        String url2 = "http://10.10.1.77:9091/\{test\}";  
        User user = new User();  
        user.setName("ceshi");  
        user.setAge("12");  
        String userJson = JsonChangeUtil.getJson(user);  
        HttpHeaders headers = this.prepareHttpHeader();  
        HttpEntity<String> entity = new HttpEntity<>(userJson, headers);  
        //get方式请求  
        /\*\*  
         \* 无参数形式  
         \*/  
        ResponseEntity<String> responseEntity1 = restTemplate.getForEntity(url, String.class);  
        String cesh1 = restTemplate.getForObject(url, String.class);  
        /\*\*  
         \* 带参数形式  
         \*/  
        ResponseEntity<String> responseEntity2 = restTemplate.getForEntity(url1, String.class,"getAdv");  
        String cesh2 = restTemplate.getForObject(url1, String.class, "getAdv");  
        /\*\*  
         \* 带参数用map封装的模式  
         \*/  
        HashMap<String, String> ceshiMap = new HashMap<String, String>();  
        ceshiMap.put("test", "getAdv");  
        ResponseEntity<String> responseEntity3 = restTemplate.getForEntity(url1, String.class,ceshiMap);  
        String cesh3 = restTemplate.getForObject(url1, String.class, ceshiMap);  
          
          
        //POST方式请求  
        /\*\*  
         \* 方法的第一参数表示要调用的服务的地址  
         \* 方法的第二个参数表示上传的参数  
         \* 方法的第三个参数表示返回的消息体的数据类型  
         \*/  
        ResponseEntity<String> responseEntity4 = restTemplate.postForEntity(url, entity, String.class);  
        String cesh4 = restTemplate.postForObject(url1, entity, String.class);  
        /\*\*  
         \* 带参数的模式  
         \*/  
        ResponseEntity<String> responseEntity5 = restTemplate.postForEntity(url1, entity, String.class, "getAdv");  
        String cesh5 = restTemplate.postForObject(url1, entity, String.class, "getAdv");  
        /\*\*  
         \* 带参数用map封装的模式  
         \*/  
        HashMap<String, String> ceshiMap1 = new HashMap<>();  
        ceshiMap.put("test", "getAdv");  
        ResponseEntity<String> responseEntity6 = restTemplate.postForEntity(url2, entity, String.class, ceshiMap1);  
        String cesh6 = restTemplate.postForObject(url2, entity, String.class, ceshiMap1);  
          
        System.out.println(responseEntity1.getBody());  
    \}  
      
    public HttpHeaders prepareHttpHeader() \{  
        HttpHeaders headers = new HttpHeaders();  
        headers.add("Content-type", "text/plain;charset=UTF-8");  
        headers.add("Accept-Charset", "UTF-8");  
        return headers;  
    \}

pom.xml需要引入：

<dependency>  
            <groupId>org.springframework.boot</groupId>  
            <artifactId>spring-boot-starter-web</artifactId>  
        </dependency>

<dependency>  
                <groupId>org.apache.httpcomponents</groupId>  
                <artifactId>httpclient</artifactId>  
                    <version>4.3.3</version>  
            </dependency>