怎么调用别人接口？
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目录
前言
工作中调别人接口拿数据必不可少 应该怎么取拿呢
提示：确实是非常非常的简单~~~~~
一、怎么调用别人接口？
往下看~~~~~
二、使用步骤
1.配置restTemplateConfig
不配置用不了！！！！：
@Configuration
public class restTemplateConfig
private static final Logger logger= LoggerFactory.getLogger(restTemplateConfig.class);
@Bean
public RestTemplate restTemplate()
// 添加内容转换器,使用默认的内容转换器
RestTemplate restTemplate = new RestTemplate(httpRequestFactory());
// 设置编码格式为UTF-8
List<HttpMessageConverter<?>> converterList = restTemplate.getMessageConverters();
HttpMessageConverter<?> converterTarget = null;
for (HttpMessageConverter<?> item : converterList)
if (item.getClass() == StringHttpMessageConverter.class)
converterTarget = item;
break;
if (converterTarget != null)
converterList.remove(converterTarget);
HttpMessageConverter<?> converter = new StringHttpMessageConverter(StandardCharsets.UTF_8);
converterList.add(1,converter);
return restTemplate;
@Bean
public ClientHttpRequestFactory httpRequestFactory()
return new HttpComponentsClientHttpRequestFactory(httpClient());
@Bean
public HttpClient httpClient()
// 长连接保持30秒
PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(30, TimeUnit.SECONDS);
//设置整个连接池最大连接数 根据自己的场景决定
connectionManager.setMaxTotal(500);
//同路由的并发数,路由是对maxTotal的细分
connectionManager.setDefaultMaxPerRoute(500);
//requestConfig
RequestConfig requestConfig = RequestConfig.custom()
//服务器返回数据(response)的时间，超过该时间抛出read timeout
.setSocketTimeout(10000)
//连接上服务器(握手成功)的时间，超出该时间抛出connect timeout
.setConnectTimeout(5000)
//从连接池中获取连接的超时时间，超过该时间未拿到可用连接，会抛出org.apache.http.conn.ConnectionPoolTimeoutException: Timeout waiting for connection from pool
.setConnectionRequestTimeout(500)
.build();
//headers
List<Header> headers = new ArrayList<>();
headers.add(new BasicHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (Khtml, like Gecko) Chrome/31.0.1650.16 Safari/537.36"));
headers.add(new BasicHeader("Accept-Encoding", "gzip,deflate"));
headers.add(new BasicHeader("Accept-Language", "zh-CN"));
headers.add(new BasicHeader("Connection", "Keep-Alive"));
headers.add(new BasicHeader("Content-type", "application/json;charset=UTF-8"));
return HttpClientBuilder.create()
.setDefaultRequestConfig(requestConfig)
.setConnectionManager(connectionManager)
.setDefaultHeaders(headers)
// 保持长连接配置，需要在头添加Keep-Alive
.setKeepAliveStrategy(new DefaultConnectionKeepAliveStrategy())
//重试次数，默认是3次，没有开启
.setRetryHandler(new DefaultHttpRequestRetryHandler(2, true))
.build();
@Bean
public RestTemplate customRestTemplate()
HttpComponentsClientHttpRequestFactory httpComponentsClientHttpRequestFactory = new HttpComponentsClientHttpRequestFactory();
httpComponentsClientHttpRequestFactory.setConnectionRequestTimeout(10);
httpComponentsClientHttpRequestFactory.setConnectTimeout(10);
httpComponentsClientHttpRequestFactory.setReadTimeout(10);
return new RestTemplate(httpComponentsClientHttpRequestFactory);
2.自己测试一下
//junit 测试~~~~
public class test
@Autowired
RestTemplate restTemplate;
@Test
public void get()throws Exception
String url = "http://localhost/xxx/xxx?id=id";
Map<String, Object> paramMap = new HashMap<String, Object>();
paramMap.put("id", 1);
String result1 = restTemplate.getForObject(url, String.class, paramMap);
System.out.println("result1====================" + result1);
//如果添加请求头什么的用下面这个
/*
HttpHeaders headers = new HttpHeaders();
HttpEntity<MultiValueMap<String, Object>> httpEntity = new HttpEntity<MultiValueMap<String, Object>>(null,headers);
ResponseEntity<String> response2 = restTemplate.exchange(url, HttpMethod.GET, httpEntity, String.class,paramMap);
System.out.println("result2====================" + response2.getBody());*/
二、第二种办法
public class HttpPostUtil
/**
* 模拟浏览器的请求
*
* @param httpURL 发送请求的地址
* @param params 请求参数
* @return
* @throws Exception
*/
public static String sendHttpRequest(String httpURL, Map<String, String> params) throws Exception
//建立URL连接对象
URL url = new URL(httpURL);
//创建连接
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//设置请求的方式(需要是大写的)
conn.setRequestMethod("POST");
//设置需要输出
conn.setDoOutput(true);
//判断是否有参数.
if (params != null && params.size() > 0)
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, String> entry : params.entrySet())
sb.append("&").append(entry.getKey()).append("=").append(entry.getValue());
//sb.substring(1)去除最前面的&
conn.getOutputStream().write(sb.substring(1).toString().getBytes("utf-8"));
//发送请求到服务器
conn.connect();
//获取远程响应的内容.
String responseContent = StreamUtils.copyToString(conn.getInputStream(), Charset.forName("utf-8"));
conn.disconnect();
return responseContent;
/**
* 模拟浏览器的请求
*
* @param httpURL 发送请求的地址
* @param jesssionId 会话Id
* @return
* @throws Exception
*/
public static void sendHttpRequest(String httpURL, String jesssionId) throws Exception
//建立URL连接对象
URL url = new URL(httpURL);
//创建连接
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//设置请求的方式(需要是大写的)
conn.setRequestMethod("POST");
//设置需要输出
conn.setDoOutput(true);
conn.addRequestProperty("Cookie", "JSESSIONID=" + jesssionId);
//发送请求到服务器
conn.connect();
conn.getInputStream();
conn.disconnect();
public static String sendCadreIdHttpRequest(String httpURL) throws Exception
//建立URL连接对象
URL url = new URL(httpURL);
//创建连接
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//设置请求的方式(需要是大写的)
conn.setRequestMethod("POST");
//设置需要输出
conn.setDoOutput(true);
//发送请求到服务器
conn.connect();
//获取远程响应的内容.
String responseContent = StreamUtils.copyToString(conn.getInputStream(), Charset.forName("utf-8"));
conn.disconnect();
return responseContent;
public static String sendCadreIdHttpRequestGET(String httpURL) throws Exception
//建立URL连接对象
URL url = new URL(httpURL);
//创建连接
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//设置请求的方式(需要是大写的)
conn.setRequestMethod("GET");
//设置需要输出
conn.setDoOutput(true);
//发送请求到服务器
conn.connect();
//获取远程响应的内容.
String responseContent = StreamUtils.copyToString(conn.getInputStream(), Charset.forName("utf-8"));
conn.disconnect();
return responseContent;
public List<User> getUser(String cadreId)
//参数
Map<String, String> map = new HashMap<>();
map.put("woshicanshu", "canshu");
List<User> letterList = new ArrayList<>();
try
String json = HttpPostUtil.sendHttpRequest("http://127.0.0.1:8080/user/getUser", map);
if (StringUtils.isNotEmpty(json))
ArrayList<User> users= JSON.parseObject(json, new TypeReference<ArrayList<User>>()
);
return users;
return users;
catch (Exception e)
e.printStackTrace();
return users;
总结
调别人接口贼简单 这是GET请求 Post就把restTemplate.getForObject改成restTemplate.PostForObject 是不是贼简单~~~~
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