feat(jwt): implement JWT-based authentication system

weblog-module-jwt/src/main/java/com/hanserwei/jwt/handler/RestAuthenticationSuccessHandler.java

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+package com.hanserwei.jwt.handler;
+
+import com.hanserwei.common.utils.Response;
+import com.hanserwei.jwt.model.LoginRspVO;
+import com.hanserwei.jwt.utils.JwtTokenHelper;
+import com.hanserwei.jwt.utils.ResultUtil;
+import jakarta.annotation.Resource;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
+import org.springframework.stereotype.Component;
+
+import java.io.IOException;
+
+@Slf4j
+@Component
+public class RestAuthenticationSuccessHandler implements AuthenticationSuccessHandler {
+
+    @Resource
+    private JwtTokenHelper jwtTokenHelper;
+
+    @Override
+    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException {
+        // 从 authentication 对象中获取用户的 UserDetails 实例，这里是获取用户的用户名
+        UserDetails userDetails = (UserDetails) authentication.getPrincipal();
+
+        // 通过用户名生成 Token
+        String username = userDetails.getUsername();
+        String token = jwtTokenHelper.generateToken(username);
+
+        // 返回 Token
+        LoginRspVO loginRspVO = LoginRspVO.builder().token(token).build();
+
+        ResultUtil.ok(response, Response.success(loginRspVO));
+    }
+}