Java POST請求案例
阿新 • • 發佈：2020-10-24
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Person(物件)
public class Person {
private String name;
private Integer age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}PersonReq（請求引數物件）
public class PersonReq {
private String name;
private Integer age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}DemoService（業務類）
package com.demo;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.List;
@Service
public class DemoService {
/**
* 獲取列表
*
* @param personReq 物件引數
* @return
*/
public List<Person> personList(PersonReq personReq) {
List<Person> list = new ArrayList<>();
Person person = new Person();
person.setAge(personReq.getAge());
person.setName(personReq.getName());
Person person1 = new Person();
person1.setAge(20);
person1.setName("2詩");
list.add(person);
list.add(person1);
return list;
}
}
DemoController（控制類）
package com.demo;
import com.alibaba.fastjson.JSON;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
@RequestMapping("/demo")
public class DemoController {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
@Autowired
DemoService demo;
@PostMapping("/list")
public List<Person> getPerson(@RequestBody PersonReq personReq) {
List<Person> people = demo.personList(personReq);
logger.info("list:{}", JSON.toJSONString(people));
return people;
}
}
Application （啟動類）
啟動專案，然後下一步，外部 就可以開始調介面了
package com;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
import springfox.documentation.swagger2.annotations.EnableSwagger2;
@EnableScheduling
@EnableSwagger2
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
HttpClients（工具類）
package com.demo;
import com.alibaba.fastjson.JSONObject;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* HTTP 工具類
*/
public class HttpClients {
/**
* 傳送POST請求
*
* @param url 請求URL
* @param param 請求引數
* @return
*/
private String sendPost(String url, String param) {
return null;
}
public static String sendPost(String url, String request, String ContentType) {
String result = "";
try {
//儲存請求
PrintWriter out;
//儲存介面返回的response
BufferedReader in;
// 獲取訪問地址
//得到網路訪問物件java.net.HttpURLConnection
URL realUrl = new URL(url);
//設定請求引數，以流的形式連線
HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
//設定http的請求頭
conn.setRequestProperty("accept", "*/*");
//設定請求的Contenttype
if (ContentType == null || ContentType.equals("")) {
if (isJson(request)) {
conn.setRequestProperty("Content-Type", "application/json;charset=utf-8");
} else {
if (url.toLowerCase().contains(".asmx")) {
conn.setRequestProperty("Content-Type", "text/xml;charset=utf-8");
} else {
conn.setRequestProperty("Content-Type", "application/xml;charset=utf-8");
}
}
} else {
conn.setRequestProperty("Content-Type", ContentType);
}
//特殊處理：如果是1.0的請求則進一步具體設定setRequestProperty，並對xml格式做優化
if (url.toLowerCase().contains(".asmx")) {
if (url.toLowerCase().contains("datacomparews")) {
conn.setRequestProperty("SOAPAction", "http://tempuri.org/DataTableCompare");
String Xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
"<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">" +
"<soap:Body>";
Xml += request.replace("<?xml version=\"1.0\" encoding=\"UTF-8\"?>", "");
Xml += "</soap:Body></soap:Envelope>";
request = Xml;
} else {
String Xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
"<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">" +
"<soap:Body><Request xmlns=\"http://tempuri.org/\"><requestXML>" + "<![CDATA[";
Xml += request.replace("<?xml version=\"1.0\" encoding=\"UTF-8\"?>", "");
Xml += "]]></requestXML></Request></soap:Body></soap:Envelope>";
request = Xml;
conn.setRequestProperty("SOAPAction", "http://tempuri.org/Request");
}
}
//keep-alive 發出的請求建議伺服器端保留連線，這樣下次向同一個伺服器發請求時可以走同一個連線
conn.setRequestProperty("connection", "Keep-Alive");
//設定請求的瀏覽器相關屬性
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
//設定接受的返回流位元組碼為UTF-8
conn.setRequestProperty("Accept-Charset", "utf-8");
conn.setRequestProperty("Charset", "utf-8");
//設定超時時間，如果未設定超時時間，但是訪問超時了就會一直卡在這裡
conn.setConnectTimeout(50000 * 12);
conn.setReadTimeout(50000 * 12);
//設定是否向HttpURLConnection輸出，預設為false,傳送post請求的不啊必須設定為true
conn.setDoOutput(true);
//設定是否從httpUrlConnection讀入，預設為true，不設定也可以
conn.setDoInput(true);
//處理輸入請求 ,設定請求正文，即要提交的資料
out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(), "utf-8"));
// 寫入引數到請求中
out.print(request);
//flush輸出流的緩衝
out.flush();
//處理輸出介面，遠端物件變為可用
in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
result = e.getMessage();
e.printStackTrace();
}
return result;
}
/**
* 判斷字串是不是json格式
*
* @param request
* @return
*/
private static boolean isJson(String request) {
try {
JSONObject.parseObject(request);
return true;
} catch (Exception e) {
return false;
}
}
}
Demo1Controller（外部呼叫類）
package com.demo;
import com.alibaba.fastjson.JSON;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/demo1")
public class Demo1Controller {
private static final Logger logger = LoggerFactory.getLogger(Demo1Controller.class);
@PostMapping("/list")
public String getPerson1() {
PersonReq personReq = new PersonReq();
personReq.setAge(10);
personReq.setName("1詩");
String url = "http://localhost:8080/demo/list";
String result = HttpClients.sendPost(url, JSON.toJSONString(personReq), "");
logger.info(" getPerson1 list:{}", result);
return result;
}
//mian方法測試
public static void main(String[] args) {
PersonReq personReq = new PersonReq();
personReq.setAge(10);
personReq.setName("1詩");
String url = "http://localhost:8080/demo/list";
String result = HttpClients.sendPost(url, JSON.toJSONString(personReq), "");
logger.info("result:{}", result);
}
}
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