初始化项目

2026-04-30 10:47:26 +08:00
commit c932419c73
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+package org.example;
+
+/**
+ * packageName com.example.demo
+ *
+ * @author congtiexin
+ * @date 2025/6/3
+ * @description TODO
+ */
+
+import com.google.gson.Gson;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public class HttpUtils {
+
+    private static final Gson gson = new Gson();
+
+    /**
+     * 发送 POST 请求并返回 JSON 响应
+     *
+     * @param url      请求地址
+     * @param request  请求对象（Java Bean 或 Map）
+     * @return         响应内容（Map 或 自定义对象）
+     */
+    public static <T> T postJson(String url, Object request, Class<T> responseType) throws Exception {
+        HttpURLConnection connection = null;
+        try {
+            // 初始化连接
+            connection = (HttpURLConnection) new URL(url).openConnection();
+            connection.setRequestMethod("POST");
+            connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
+            connection.setRequestProperty("Accept", "application/json");
+            connection.setDoOutput(true);
+
+            // 序列化请求体
+            String jsonInput = gson.toJson(request);
+            try (OutputStream os = connection.getOutputStream()) {
+                os.write(jsonInput.getBytes("UTF-8"));
+                os.flush();
+            }
+
+            // 处理响应
+            int responseCode = connection.getResponseCode();
+            if (responseCode != HttpURLConnection.HTTP_OK) {
+                throw new RuntimeException("请求失败，状态码: " + responseCode);
+            }
+
+            StringBuilder response = new StringBuilder();
+            try (BufferedReader br = new BufferedReader(
+                    new InputStreamReader(connection.getInputStream(), "UTF-8"))) {
+                String line;
+                while ((line = br.readLine()) != null) {
+                    response.append(line);
+                }
+            }
+
+            // 反序列化响应
+            return gson.fromJson(response.toString(), responseType);
+        } finally {
+            if (connection != null) {
+                connection.disconnect();
+            }
+        }
+    }
+
+    /**
+     * 快速发送 JSON POST 请求并返回原始字符串响应
+     */
+    public static String postJson(String url, String jsonBody) throws Exception {
+        HttpURLConnection connection = null;
+        try {
+            connection = (HttpURLConnection) new URL(url).openConnection();
+            connection.setRequestMethod("POST");
+            connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
+            connection.setDoOutput(true);
+
+            try (OutputStream os = connection.getOutputStream()) {
+                byte[] input = jsonBody.getBytes("UTF-8");
+                os.write(input, 0, input.length);
+                os.flush();
+            }
+
+            int responseCode = connection.getResponseCode();
+            if (responseCode != HttpURLConnection.HTTP_OK) {
+                throw new RuntimeException("请求失败，状态码: " + responseCode);
+            }
+
+            StringBuilder response = new StringBuilder();
+            try (BufferedReader br = new BufferedReader(
+                    new InputStreamReader(connection.getInputStream(), "UTF-8"))) {
+                String line;
+                while ((line = br.readLine()) != null) {
+                    response.append(line);
+                }
+            }
+
+            return response.toString();
+        } finally {
+            if (connection != null) {
+                connection.disconnect();
+            }
+        }
+    }
+}