diff --git a/javaweb_project/src/com/hua/filter/LoginCheckCodeFilter.java b/javaweb_project/src/com/hua/filter/LoginCheckCodeFilter.java
index dd15df3..e69d097 100644
--- a/javaweb_project/src/com/hua/filter/LoginCheckCodeFilter.java
+++ b/javaweb_project/src/com/hua/filter/LoginCheckCodeFilter.java
@@ -1,48 +1,48 @@
-package com.hua.filter;
+package com.hua.filter; // 定义包名
 
-import java.io.IOException;
-import javax.servlet.DispatcherType;
-import javax.servlet.FilterChain;
-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebFilter;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
+import java.io.IOException; // 导入IOException类，用于处理IO异常
+import javax.servlet.DispatcherType; // 导入DispatcherType枚举，用于定义过滤器的调度类型
+import javax.servlet.FilterChain; // 导入FilterChain接口，用于调用下一个过滤器或目标资源
+import javax.servlet.ServletException; // 导入ServletException类，用于处理servlet异常
+import javax.servlet.annotation.WebFilter; // 导入WebFilter注解，用于声明过滤器
+import javax.servlet.http.HttpServletRequest; // 导入HttpServletRequest接口，用于处理HTTP请求
+import javax.servlet.http.HttpServletResponse; // 导入HttpServletResponse接口，用于处理HTTP响应
 
 /**
- * ��¼ʱ���� ��֤���Ƿ�һ��
+ * 登录时检验 验证码是否一致
  * @author hua
  *
  */
-@WebFilter(dispatcherTypes = {
-				DispatcherType.REQUEST, 
-				DispatcherType.FORWARD, 
-				DispatcherType.INCLUDE, 
-				DispatcherType.ERROR
+@WebFilter(dispatcherTypes = { // 使用WebFilter注解定义过滤器，并指定其调度类型
+				DispatcherType.REQUEST, // 请求调度类型
+				DispatcherType.FORWARD, // 转发调度类型
+				DispatcherType.INCLUDE, // 包含调度类型
+				DispatcherType.ERROR // 错误调度类型
 		}
-					, urlPatterns = { "/loginChangeServlet" })
-public class LoginCheckCodeFilter extends HttpFilter {
+					, urlPatterns = { "/loginChangeServlet" }) // 指定过滤器的URL模式
+public class LoginCheckCodeFilter extends HttpFilter { // 定义LoginCheckCodeFilter类，继承自HttpFilter
 
 	@Override
-	public void doFilter(HttpServletRequest request,
+	public void doFilter(HttpServletRequest request, // 覆盖doFilter方法，处理请求
 			HttpServletResponse response, FilterChain filterChain)
 			throws IOException, ServletException {
-		//1. ��ȡ�������: CHECK_CODE_PARAM_NAME
-		String paramCode = request.getParameter("CHECK_CODE_PARAM_NAME");
-				
-		//2. ��ȡ session �е� CHECK_CODE_KEY ����ֵ
-		String sessionCode = (String)request.getSession().getAttribute("CHECK_CODE_KEY");
-				
-		//3. �ȶ�. ���Ƿ�һ��, ��һ��˵����֤����ȷ, ����һ��, ˵����֤�����
-		if(!(paramCode != null && paramCode.equalsIgnoreCase(sessionCode))){
-			request.getSession().setAttribute("message", "��֤�벻һ��!");
-			request.getSession().setAttribute("username", request.getParameter("username"));
+		//1. 获取请求参数: CHECK_CODE_PARAM_NAME
+		String paramCode = request.getParameter("CHECK_CODE_PARAM_NAME"); // 从请求中获取名为"CHECK_CODE_PARAM_NAME"的参数值
+		
+		//2. 获取 session 中的 CHECK_CODE_KEY 属性值
+		String sessionCode = (String)request.getSession().getAttribute("CHECK_CODE_KEY"); // 从session中获取名为"CHECK_CODE_KEY"的属性值
+		
+		//3. 比对. 看是否一致, 若一致说明验证码正确, 若不一致, 说明验证码错误
+		if(!(paramCode != null && paramCode.equalsIgnoreCase(sessionCode))){ // 判断参数值和session值是否相等（忽略大小写）
+			request.getSession().setAttribute("message", "验证码不一致!"); // 设置错误消息到session
+			request.getSession().setAttribute("username", request.getParameter("username")); // 将用户名设置到session中
 			
-			response.sendRedirect(request.getContextPath() + "/login/login.jsp");
-			return;
+			response.sendRedirect(request.getContextPath() + "/login/login.jsp"); // 重定向到登录页面
+			return; // 中断方法执行
 		}
 				
-		filterChain.doFilter(request, response);
+		filterChain.doFilter(request, response); // 如果验证码正确，继续调用过滤器链
 		
 	}
 	
-}
+}
\ No newline at end of file