SpringBoot 接口开发教程(httpclient客户端)
时间：2022-12-10 12:10:04 | 栏目：JAVA代码 | 点击：次
SpringBoot接口开发
服务端
@RestController
@RequestMapping("/landary")
public class landaryController {
@RequestMapping("adduser")
public JSONObject addUser(@RequestBody JSONObject userEntity)
{
System.out.println(JSONObject.toJSONString(userEntity));
JSONObject json=new JSONObject();
json.fluentPut("code","500").fluentPut("result",userEntity);
return json;
}
@RequestMapping("showuser")
public Object showUser()
{
return JSON.toJSONString("hhh");
}
}
客户端post请求
public static String sendSms(String uid,String title,String content){
HttpClient httpclient = new DefaultHttpClient();
String smsUrl="http://127.0.0.1:8088/landary/adduser";
HttpPost httppost = new HttpPost(smsUrl);
String strResult = "";
try {
JSONObject jobj = new JSONObject();
jobj.put("uid", uid);
jobj.put("title", title);
jobj.put("content",content);
System.out.println(jobj.toString());
// nameValuePairs.add(new BasicNameValuePair("msg", (jobj.toString())));
/* httppost.addHeader("Content-type", "application/json; charset=utf-8");
httppost.setHeader("Accept", "application/json");
httppost.setEntity(new StringEntity(jobj.toString(), Charset.forName("UTF-8")));*/
StringEntity s = new StringEntity(jobj.toString());
s.setContentEncoding("UTF-8");
s.setContentType("application/json");//发送json数据需要设置contentType
httppost.setEntity(s);
HttpResponse response = httpclient.execute(httppost);
if (response.getStatusLine().getStatusCode() == 200) {
/*读返回数据*/
String conResult = EntityUtils.toString(response
.getEntity());
System.out.println(conResult);
JSONObject sobj = new JSONObject();
sobj = JSONObject.parseObject(conResult);
String result = sobj.getString("result");
String code = sobj.getString("code");
if(code.equals("500")){
System.out.println(result);
strResult += "发送成功";
}else{
strResult += "发送失败，"+code;
}
} else {
String err = response.getStatusLine().getStatusCode()+"";
strResult += "发送失败:"+err;
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return strResult;
}
get请求
/**
* 发送 get请求
*/
public void get() {
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
// 创建httpget.
HttpGet httpget = new HttpGet("http://127.0.0.1:8088/landary/showuser");
System.out.println("executing request " + httpget.getURI());
// 执行get请求.
CloseableHttpResponse response = httpclient.execute(httpget);
try {
// 获取响应实体
HttpEntity entity = response.getEntity();
System.out.println("--------------------------------------");
// 打印响应状态
System.out.println(response.getStatusLine());
if (entity != null) {
// 打印响应内容长度
System.out.println("Response content length: " + entity.getContentLength());
// 打印响应内容
System.out.println("Response content: " + EntityUtils.toString(entity));
}
System.out.println("------------------------------------");
} finally {
response.close();
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
// 关闭连接,释放资源
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
SpringBoot之httpclient使用
超文本传输协议（HTTP，HyperText Transfer Protocol)是互联网上应用最为广泛的一种网络协议。所有的WWW文件都必须遵守这个标准。而HttpClient是可以支持http相关协议的工具包
它有如下功能：
1.实现了所有的http方法（GET,POST,PUT,HEAD 等）
2.支持自动转向
3.支持 HTTPS 协议
4.支持代理服务器等
既然HttpClient使用这么广泛，则本文讲解下Spring Boot 中怎么使用HttpClient.如下：
引入相关依赖
<!-- http所需包 --> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpcore</artifactId> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpmime</artifactId> </dependency> <!-- /http所需包 --> <!-- 数据解析所需包 --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.4</version> </dependency> <dependency> <groupId>commons-lang</groupId> <artifactId>commons-lang</artifactId> <version>2.6</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.4</version> </dependency> <!-- /数据解析所需包 -->
编写相关工具类
写个http的工具类，以便业务代码直接调用，如下：
/**
* Http工具类
*/
public class HttpUtils {
/**
* 发送POST请求
* @param url 请求url
* @param data 请求数据
* @return 结果
*/
@SuppressWarnings("deprecation")
public static String doPost(String url, String data) {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(url);
RequestConfig requestConfig = RequestConfig.custom()
.setSocketTimeout(10000).setConnectTimeout(20000)
.setConnectionRequestTimeout(10000).build();
httpPost.setConfig(requestConfig);
String context = StringUtils.EMPTY;
if (!StringUtils.isEmpty(data)) {
StringEntity body = new StringEntity(data, "utf-8");
httpPost.setEntity(body);
}
// 设置回调接口接收的消息头
httpPost.addHeader("Content-Type", "application/json");
CloseableHttpResponse response = null;
try {
response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
context = EntityUtils.toString(entity, HTTP.UTF_8);
} catch (Exception e) {
e.getStackTrace();
} finally {
try {
response.close();
httpPost.abort();
httpClient.close();
} catch (Exception e) {
e.getStackTrace();
}
}
return context;
}
/**
* 解析出url参数中的键值对
* @param url url参数
* @return 键值对
*/
public static Map<String, String> getRequestParam(String url) {
Map<String, String> map = new HashMap<String, String>();
String[] arrSplit = null;
// 每个键值为一组
arrSplit = url.split("[&]");
for (String strSplit : arrSplit) {
String[] arrSplitEqual = null;
arrSplitEqual = strSplit.split("[=]");
// 解析出键值
if (arrSplitEqual.length > 1) {
// 正确解析
map.put(arrSplitEqual[0], arrSplitEqual[1]);
} else {
if (arrSplitEqual[0] != "") {
map.put(arrSplitEqual[0], "");
}
}
}
return map;
}
}
业务代码中使用
业务中代码使用，拼装请求Url和请求数据，就可以调用工具类里的doPost（）方法开始直接使用咯。如下：
private String getFileStorePath(String courtId, String seesionId){
String fileStorePath = StringUtils.EMPTY;
//请求参数
String data = "{\"courtId\":\"" + courtId + "\",\"sessionId\":\"" + seesionId + "\"}";
String fileServiceUrl="http://111.11.11.11:8086";
//发送请求，获取结果
String result = HttpUtils.doPost(fileServiceUrl + "/ms-service/voice/search", data);
if(StringUtils.isNotBlank(result)){
com.alibaba.fastjson.JSONObject jsonobject = JSON.parseObject(result);
fileStorePath = jsonobject.getString("path");
logger.info("fileStorePath = " + fileStorePath);
}
return fileStorePath;
}