java中调用第三方接口获取数据的方式

//get请求方式

private String getInfo(Map<String, Object> params,String URL) {

// 创建Httpclient对象
CloseableHttpClient httpclient = HttpClients.createDefault();
CloseableHttpResponse response = null;
String resultString=null;
try {
// 创建uri
URIBuilder builder = new URIBuilder(URL);
if (params != null) {
for (String key : params.keySet()) {
builder.addParameter(key, params.get(key).toString());
}
}
URI uri = builder.build();
// 创建http GET请求
HttpGet httpGet = new HttpGet(uri);
// 执行请求
response = httpclient.execute(httpGet);
// 判断返回状态是否为200
if (response.getStatusLine().getStatusCode() == 200) {
resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (response != null) {
response.close();
}
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return resultString;
}

//post请求方式

private String getInfo(Map<String, Object> params, String URL) {
// 创建Httpclient对象
CloseableHttpClient httpclient = HttpClients.createDefault();
CloseableHttpResponse response = null;
String resultString = null;
try {
// 创建uri
URIBuilder builder = new URIBuilder(URL);
if (params != null) {
for (String key : params.keySet()) {
builder.addParameter(key, params.get(key).toString());
}
}
URI uri = builder.build();
// 创建http POST请求
HttpPost httpPost = new HttpPost(uri);

// 执行请求
response = httpclient.execute(httpPost);
// 判断返回状态是否为200
if (response.getStatusLine().getStatusCode() == 200) {
resultString = EntityUtils.toString(response.getEntity(),"UTF-8");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (response != null) {
response.close();
}
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return resultString;
}

//传送json类型参数的post请求
private String getCarMapInfo(String json, String URL) {
// 创建Httpclient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpResponse response = null;
String resultString = null;
try {
// 创建Http Post请求
HttpPost httpPost = new HttpPost(URL);
// 创建请求内容
StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
httpPost.setEntity(entity);

// 执行http请求
response = httpClient.execute(httpPost);
resultString = EntityUtils.toString(response.getEntity(), "utf-8");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
response.close();
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return resultString;
}