feat(jwt): implement JWT-based authentication system

weblog-module-jwt/src/main/java/com/hanserwei/jwt/utils/ResultUtil.java

@@ -0,0 +1,67 @@
+package com.hanserwei.jwt.utils;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.hanserwei.common.utils.Response;
+import jakarta.servlet.http.HttpServletResponse;
+import org.springframework.http.HttpStatus;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+
+public class ResultUtil {
+
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+
+    /**
+     * 成功响应
+     *
+     * @param response HttpServletResponse对象
+     * @param result   响应数据
+     * @throws IOException IO异常
+     */
+    public static void ok(HttpServletResponse response, Response<?> result) throws IOException {
+        writeResponse(response, HttpStatus.OK.value(), result);
+    }
+
+    /**
+     * 失败响应
+     *
+     * @param response HttpServletResponse对象
+     * @param result   响应数据
+     * @throws IOException IO异常
+     */
+    public static void fail(HttpServletResponse response, Response<?> result) throws IOException {
+        writeResponse(response, HttpStatus.OK.value(), result);
+    }
+
+    /**
+     * 失败响应
+     *
+     * @param response HttpServletResponse对象
+     * @param status   HTTP状态码
+     * @param result   响应数据
+     * @throws IOException IO异常
+     */
+    public static void fail(HttpServletResponse response, int status, Response<?> result) throws IOException {
+        writeResponse(response, status, result);
+    }
+
+    /**
+     * 写入响应数据
+     *
+     * @param response HttpServletResponse对象
+     * @param status   HTTP状态码
+     * @param result   响应数据
+     * @throws IOException IO异常
+     */
+    private static void writeResponse(HttpServletResponse response, int status, Response<?> result) throws IOException {
+        response.setCharacterEncoding("UTF-8");
+        response.setStatus(status);
+        response.setContentType("application/json");
+
+        try (PrintWriter writer = response.getWriter()) {
+            writer.write(objectMapper.writeValueAsString(result));
+            writer.flush();
+        }
+    }
+}