一个接收map的接口
@RequestMapping("kkw")
public String kkw(@RequestBody Map<String,Object>map){
if(map != null){
System.out.println(JSONObject.toJSONString(map));;
}
return "success";
}
package com.example.demo.test;
import com.alibaba.fastjson.JSONObject;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
public class HttpJsonCase {
public static void main(String[] args) {
try {
// 定义目标 URL
String url = "http://127.0.0.1:9200/kkw";
// 创建 HTTP 连接并设置请求方法为 POST
HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
conn.setRequestMethod("GET");
// 设定要传输的数据格式为 JSON
conn.setRequestProperty("Content-Type", "application/json; utf-8");
conn.setRequestProperty("Accept", "application/json");
// 启用输出,因为我们需要将 JSON 请求正文发送到 API 端点。
conn.setDoOutput(true);
Map<String,Object> map = new HashMap<>();
map.put("key","value");
map.put("name","caoxuekun");
// 创建 JSON 数据对象
String jsonInputString = JSONObject.toJSONString(map);
// 将 JSON 数据写入 HTTP 请求正文中
try {
OutputStream os = conn.getOutputStream();
byte[] input = jsonInputString.getBytes("utf-8");
os.write(input, 0, input.length);
}catch (Exception e){
}
// 获取 API 响应并打印
try{
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
StringBuilder response = new StringBuilder();
String responseLine = null;
while ((responseLine = br.readLine()) != null) {
response.append(responseLine.trim());
}
System.out.println(response.toString());
}catch (Exception e){
e.printStackTrace();
}
// 断开连接
conn.disconnect();
} catch (Exception e) {
System.err.println(e);
}
}
}
标签:map,java,String,new,json,import,http,conn
From: https://www.cnblogs.com/caoxuekun/p/17495125.html