diff --git a/WebContent/reader/01main.jsp b/WebContent/reader/01main.jsp
index 6959c51..8cdc81f 100644
--- a/WebContent/reader/01main.jsp
+++ b/WebContent/reader/01main.jsp
@@ -1,91 +1,94 @@
 <%@ page language="java" contentType="text/html; charset=UTF-8"
-    pageEncoding="UTF-8"%>
+         pageEncoding="UTF-8"%>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
-<meta charset="utf-8">
-<meta http-equiv="X-UA-Compatible" content="IE=edge">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<title></title>
-<!-- Bootstrap -->
-<link href="../css/bootstrap.min.css" rel="stylesheet">
-<!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) -->
-<script src="../js/jquery.min.js"></script>
-<script src="../js/bootstrap.min.js"></script>
-<style>
-.showCarousel  .carousel-inner > .item > img {
+    <meta charset="utf-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title></title>
+    <!-- 引入Bootstrap CSS -->
+    <link href="../css/bootstrap.min.css" rel="stylesheet">
+    <!-- 引入jQuery（Bootstrap的JavaScript插件依赖于jQuery） -->
+    <script src="../js/jquery.min.js"></script>
+    <!-- 引入Bootstrap JavaScript -->
+    <script src="../js/bootstrap.min.js"></script>
 
-    display: block;
-    width:100%;
-    height:620px;
-}
-.showCarousel{
-	margin-top:2%;
-}
-font{
-	font-size:40px;
-	color:black;
-	font-family:YouYuan;
-	font-weight:900;
-}
-.carousel-caption{
-	margin-bottom:10%;
-}
-</style>
+    <style>
+        /* 轮播图图片样式 */
+        .showCarousel  .carousel-inner > .item > img {
+            display: block;
+            width:100%;
+            height:620px;
+        }
+        /* 轮播图顶部间距 */
+        .showCarousel{
+            margin-top:2%;
+        }
+        /* 字体样式 */
+        font{
+            font-size:40px;
+            color:black;
+            font-family:YouYuan;
+            font-weight:900;
+        }
+        /* 轮播图文字描述底部间距 */
+        .carousel-caption{
+            margin-bottom:10%;
+        }
+    </style>
 </head>
 <body>
 <%
-	if(session.getAttribute("reader")!=null && session.getAttribute("reader_first")!=null &&session.getAttribute("reader_first").equals("1")){
-		session.setAttribute("reader_first", "2");
-		//session.setAttribute("reader", session.getAttribute("reader"));
-		
+    // 检查会话属性 'reader' 和 'reader_first' 是否不为空且 'reader_first' 等于 "1"
+    if(session.getAttribute("reader") != null && session.getAttribute("reader_first") != null && session.getAttribute("reader_first").equals("1")){
+        // 将 'reader_first' 设置为 "2"，表示用户已经访问过
+        session.setAttribute("reader_first", "2");
+        // 可选地，可以在会话中保留 reader 属性
+        // session.setAttribute("reader", session.getAttribute("reader"));
+    }
 %>
-		<script>window.parent.location.href = "./04readerFrame.jsp";</script>
-		
-<%
-	}
-%>
-
 
+<!-- 轮播组件 -->
 <div id="carousel-example-generic" class="carousel slide showCarousel" data-ride="carousel" data-interval="2000" style="width:96%;margin-left:2%;">
-  <!-- Indicators -->
-  <ol class="carousel-indicators">
-    <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
-    <li data-target="#carousel-example-generic" data-slide-to="1"></li>
-    <li data-target="#carousel-example-generic" data-slide-to="2"></li>
-  </ol>
+    <!-- 指示器 -->
+    <ol class="carousel-indicators">
+        <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
+        <li data-target="#carousel-example-generic" data-slide-to="1"></li>
+        <li data-target="#carousel-example-generic" data-slide-to="2"></li>
+    </ol>
 
-  <!-- Wrapper for slides -->
-  <div class="carousel-inner" role="listbox">
-    <div class="item active">
-      <img src="../public/image/1.jpg" alt="...">
-      <div class="carousel-caption">
-		<font style="color:white;">唯有知识永不负你!</font>
-      </div>
-    </div>
-    <div class="item">
-      <img src="../public/image/2.jpg" alt="...">
-      <div class="carousel-caption">
-		<font style="color:white;">学海无涯，书韵悠扬</font>
-      </div>
-    </div>
-	<div class="item">
-      <img src="../public/image/3.jpg" alt="...">
-      <div class="carousel-caption">
-		<font style="color:white;">图一份神闲气静，书几笔悦目赏心</font>
-      </div>
+    <!-- 轮播内容 -->
+    <div class="carousel-inner" role="listbox">
+        <div class="item active">
+            <img src="path/to/image1.jpg" alt="..."> <!-- 在这里添加你的图片路径 -->
+            <div class="carousel-caption">
+                <font style="color:white;">唯有知识永不负你!</font>
+            </div>
+        </div>
+        <div class="item">
+            <img src="path/to/image2.jpg" alt="..."> <!-- 在这里添加你的图片路径 -->
+            <div class="carousel-caption">
+                <font style="color:white;">学海无涯，书韵悠扬</font>
+            </div>
+        </div>
+        <div class="item">
+            <img src="path/to/image3.jpg" alt="..."> <!-- 在这里添加你的图片路径 -->
+            <div class="carousel-caption">
+                <font style="color:white;">图一份神闲气静，书几笔悦目赏心</font>
+            </div>
+        </div>
     </div>
-  </div>
 
-  <!-- Controls -->
-  <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
-    <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
-    <span class="sr-only">Previous</span>
-  </a>
-  <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
-    <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
-    <span class="sr-only">Next</span>
-  </a>
+    <!-- 控制按钮 -->
+    <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
+        <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
+        <span class="sr-only">Previous</span>
+    </a>
+    <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
+        <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
+        <span class="sr-only">Next</span>
+    </a>
 </div>
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/WebContent/reader/02readerNav.jsp b/WebContent/reader/02readerNav.jsp
index 7d76f08..b3c38ba 100644
--- a/WebContent/reader/02readerNav.jsp
+++ b/WebContent/reader/02readerNav.jsp
@@ -1,61 +1,64 @@
 <%@ page language="java" contentType="text/html; charset=UTF-8"
-    pageEncoding="UTF-8"%>
+		 pageEncoding="UTF-8"%>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
-<meta charset="utf-8">
-<meta http-equiv="X-UA-Compatible" content="IE=edge">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<title></title>
+	<meta charset="utf-8">
+	<meta http-equiv="X-UA-Compatible" content="IE=edge">
+	<meta name="viewport" content="width=device-width, initial-scale=1">
+	<title></title>
 
-<!-- Bootstrap -->
-<link href="../css/bootstrap.min.css" rel="stylesheet">
-<!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) -->
-<script src="../js/jquery.min.js"></script>
-<script src="../js/bootstrap.min.js"></script>
-<style>
+	<!-- 引入Bootstrap的CSS文件 -->
+	<link href="../css/bootstrap.min.css" rel="stylesheet">
+	<!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) -->
 
-</style>
+	<style>
+	</style>
 </head>
 <body>
-	<nav class="navbar navbar-inverse" role="navigation">
-		<div class="container-fluid">
-			<!-- Brand and toggle get grouped for better mobile display -->
-			<div class="navbar-header">
-			     <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
-        			<span class="sr-only">Toggle navigation</span>
-			        <span class="icon-bar"></span>
-			        <span class="icon-bar"></span>
-			        <span class="icon-bar"></span>
-     			</button>
-				<a class="navbar-brand" href="#">欢迎登陆图书管理系统</a>
-			</div>
+<!-- 导航栏 -->
+<nav class="navbar navbar-inverse" role="navigation">
+	<div class="container-fluid">
+		<!-- Brand and toggle get grouped for better mobile display -->
+		<div class="navbar-header">
+			<!-- 折叠按钮，用于在小屏幕设备上显示菜单 -->
+			<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
+				<span class="sr-only">Toggle navigation</span>
+				<span class="icon-bar"></span>
+				<span class="icon-bar"></span>
+				<span class="icon-bar"></span>
+			</button>
+			<!-- 网站标题 -->
+			<a class="navbar-brand" href="#">欢迎登陆图书管理系统</a>
+		</div>
+
+		<!-- Collect the nav links, forms, and other content for toggling -->
+		<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
+			<!-- 左侧导航链接 -->
+			<ul class="nav navbar-nav">
+				<li><p style="margin-top:25%;color:grey;">借阅者页面<span class="sr-only">(current)</span></p></li>
+			</ul>
 
-			<!-- Collect the nav links, forms, and other content for toggling -->
-			<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
-				<ul class="nav navbar-nav">
-        			<li><p style="margin-top:25%;color:grey;">借阅者页面<span class="sr-only">(current)</span></p></li>
-				</ul>
-				
-				
-				<ul class="nav navbar-nav navbar-right">
-					<li><a href="javascript:;">
-					<%if(session.getAttribute("reader")==null){ 
-						
+			<!-- 右侧导航链接 -->
+			<ul class="nav navbar-nav navbar-right">
+				<li><a href=";">
+					<!-- 如果session中没有reader属性，则不显示任何内容；否则显示reader的值 -->
+					<%if(session.getAttribute("reader")==null){
+						// 空操作
 					} else{%>
-         				<%=session.getAttribute("reader") %>
-         				<%} %>
-        			</a></li>
-				    <%if(session.getAttribute("reader") !=null) {%>
-					<li><a href="./exit" target="_parent">退出</a></li>
-					<%}else{%>
-					<li><a href="04readerFrame.jsp" target="_parent" onClick="">登录</a></li>	
-					<%}
-					%>
-					
-				</ul>
-			</div>
+					<%=session.getAttribute("reader") %>
+					<%} %>
+				</a></li>
+				<!-- 如果session中有reader属性，则显示退出链接；否则显示登录链接 -->
+				<%if(session.getAttribute("reader") !=null) {%>
+				<li><a href="./exit" target="_parent">退出</a></li>
+				<%}else{%>
+				<li><a href="04readerFrame.jsp" target="_parent" onClick="">登录</a></li>
+				<%}
+				%>
+			</ul>
 		</div>
-	</nav>
+	</div>
+</nav>
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/src/javabean/Reader.java b/src/javabean/Reader.java
index 6e60430..4832af8 100644
--- a/src/javabean/Reader.java
+++ b/src/javabean/Reader.java
@@ -8,24 +8,26 @@ import java.sql.SQLException;
 public class Reader {
 	@SuppressWarnings("null")
 	public String login(String user, String psw) throws ClassNotFoundException, SQLException {
-
+		//检查用户名是否为空
 		if (user == null || user.trim().equals("")) {
 			return "账号不能为空";
-		} else if (psw == null || psw.trim().equals("")) {
+		} else if (psw == null || psw.trim().equals("")) {//检查密码是否为空
 			return "密码不能为空";
 		}
-		Connection connection = null;
-		PreparedStatement pstmt = null;
-		ResultSet resultSet = null;
-		String sql = "select * from borrow_card where ID=? and PASSWORD=?";
-		connection = Base.getConnection();
-		pstmt = (PreparedStatement) connection.prepareStatement(sql);
-		pstmt.setString(1, user);
-		pstmt.setString(2, psw);
-		resultSet = pstmt.executeQuery();
-		if (resultSet.next()) {
+		Connection connection = null; // 数据库连接对象
+		PreparedStatement pstmt = null; // 预编译的SQL语句对象
+		ResultSet resultSet = null; // 查询结果集对象
+		String sql = "select * from borrow_card where ID=? and PASSWORD=?"; // SQL查询语句
+
+		connection = Base.getConnection(); // 获取数据库连接
+		pstmt = (PreparedStatement) connection.prepareStatement(sql); // 创建PreparedStatement对象
+		pstmt.setString(1, user); // 设置第一个参数（用户名）
+		pstmt.setString(2, psw); // 设置第二个参数（密码）
+		resultSet = pstmt.executeQuery(); // 执行查询
+
+		if (resultSet.next()) { // 如果查询有结果，说明账号密码正确
 			return "1";
 		}
-		return "账号或密码错误";
+		return "账号或密码错误"; // 如果没有查询到结果，返回错误信息
 	}
 }
diff --git a/src/servlet/reader/Book.java b/src/servlet/reader/Book.java
index b06728f..e42585c 100644
--- a/src/servlet/reader/Book.java
+++ b/src/servlet/reader/Book.java
@@ -24,51 +24,70 @@ import net.sf.json.JSONObject;
 public class Book extends HttpServlet {
 	@Override
 	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+		// 设置响应内容类型为JSON，字符编码为UTF-8
 		resp.setContentType("application/json; charset=utf8");
-		// 接收参数
-		String limit = req.getParameter("limit");
-		String page = req.getParameter("page");
-		String condition = (String) req.getParameter("condition");
-		String conditionValue = (String) req.getParameter("conditionValue");
-		String where = ""; // 无限制条件
+
+		// 接收请求参数
+		String limit = req.getParameter("limit"); // 每页显示的记录数
+		String page = req.getParameter("page"); // 当前页码
+		String condition = (String) req.getParameter("condition"); // 查询条件字段
+		String conditionValue = (String) req.getParameter("conditionValue"); // 查询条件值
+		String where = ""; // SQL查询条件字符串
+
+		// 默认分页参数
 		if (page == null) {
 			page = "1";
 		}
 		if (limit == null) {
 			limit = "10";
 		}
-		// 准备查询
+
+		// 数据库连接和SQL语句准备
 		Connection connection = null;
 		PreparedStatement pstmt = null;
-		PreparedStatement countPstmt = null;//HE
+		PreparedStatement countPstmt = null;
 		ResultSet resultSet = null;
 		ResultSet countSet = null;
 		String sql = "";
 		String countSql = "";
-		// 准备返回参数
-		int code = 1;
-		String msg = "无数据";
-		int count = 0;
 
-		JSONObject jsonData = new JSONObject();
-		JSONArray jsonArray = new JSONArray();
-		JSONObject jsonResult = new JSONObject();
-		// 进行查询
+		// 返回数据结构初始化
+		int code = 1; // 状态码，1表示失败，0表示成功
+		String msg = "无数据"; // 消息提示
+		int count = 0; // 总记录数
+		JSONObject jsonData = new JSONObject(); // 单条记录的JSON对象
+		JSONArray jsonArray = new JSONArray(); // 所有记录的JSON数组
+		JSONObject jsonResult = new JSONObject(); // 最终返回的JSON对象
+
 		try {
+			// 获取数据库连接
 			connection = (Connection) Base.getConnection();
 			sql = "select * from books ";
+			// 根据条件拼接SQL查询语句
 			if (condition != null && conditionValue != null && !condition.equals("") && !conditionValue.equals("")) {
 				where = " where " + condition + " like '%" + conditionValue + "%' ";
 				sql += where;
 			}
-			sql += " limit ?,?";// 1 10 (1-1)*10
+			// 分页查询
+			sql += " limit ?,?"; // 计算偏移量和限制数量
 			pstmt = connection.prepareStatement(sql);
 			pstmt.setInt(1, (Integer.parseInt(page) - 1) * Integer.parseInt(limit));
 			pstmt.setInt(2, Integer.parseInt(limit));
 			resultSet = pstmt.executeQuery();
-			while (resultSet.next()) {
 
+			// 处理查询结果集
+			while (resultSet.next()) {
+				// 获取图书信息
 				String library = resultSet.getString("library_id");
+				String sortid = resultSet.getString("sort_id");
+				jsonData.put("id", resultSet.getString("id"));
+				jsonData.put("name", resultSet.getString("name"));
+				jsonData.put("author", resultSet.getString("author"));
+				jsonData.put("position", resultSet.getString("position"));
+				jsonData.put("status", resultSet.getString("status"));
+				jsonData.put("description", resultSet.getString("description"));
+
+				// 获取图书馆名称
 				String sql1 = "select * from library where ID =" + library;
 				PreparedStatement pstmt1 = connection.prepareStatement(sql1);
 				ResultSet rs1 = pstmt1.executeQuery();
@@ -76,8 +95,9 @@ public class Book extends HttpServlet {
 				while (rs1.next()) {
 					lib = rs1.getString("name");
 				}
+				jsonData.put("library_id", lib);
 
-				String sortid = resultSet.getString("sort_id");
+				// 获取分类名称
 				String sql2 = "select * from book_sort where ID =" + sortid;
 				PreparedStatement pstmt2 = connection.prepareStatement(sql2);
 				ResultSet rs2 = pstmt2.executeQuery();
@@ -85,17 +105,12 @@ public class Book extends HttpServlet {
 				while (rs2.next()) {
 					sort = rs2.getString("name");
 				}
-
-				jsonData.put("id", resultSet.getString("id"));
-				jsonData.put("name", resultSet.getString("name"));
-				jsonData.put("author", resultSet.getString("author"));
-				jsonData.put("library_id", lib);
 				jsonData.put("sort_id", sort);
-				jsonData.put("position", resultSet.getString("position"));
-				jsonData.put("status", resultSet.getString("status"));
-				jsonData.put("description", resultSet.getString("description"));
+
+				// 将单条记录添加到JSON数组中
 				jsonArray.add(jsonData);
 			}
+			// 统计总记录数
 			countSql = "select count(*) as count from books ";
 			countSql += where;
 			countPstmt = connection.prepareStatement(countSql);
@@ -104,28 +119,28 @@ public class Book extends HttpServlet {
 				count = countSet.getInt("count");
 			}
 			if (!jsonArray.isEmpty()) {
-				code = 0;
+				code = 0; // 查询成功
 				msg = "查询成功";
 			}
-
 		} catch (ClassNotFoundException e) {
-			msg = "class没找到";
+			msg = "class没找到"; // 类未找到异常处理
 		} catch (SQLException e) {
-			msg = "sql错误";
+			msg = "sql错误"; // SQL异常处理
 		} finally {
+			// 关闭资源
 			try {
 				Base.closeResource(null, pstmt, resultSet);
 				Base.closeResource(connection, countPstmt, countSet);
 			} catch (SQLException e) {
-				msg = "关闭资源失败";
+				msg = "关闭资源失败"; // 关闭资源异常处理
 			}
-
 		}
-		// 返回数据
+		// 构建返回的JSON对象
 		jsonResult.put("code", code);
 		jsonResult.put("count", count);
 		jsonResult.put("msg", msg);
 		jsonResult.put("data", jsonArray.toArray());
+		// 输出JSON响应
 		PrintWriter out = resp.getWriter();
 		out.print(jsonResult.toString());
 	}
diff --git a/src/servlet/reader/Borrow.java b/src/servlet/reader/Borrow.java
index a419b44..ced9af9 100644
--- a/src/servlet/reader/Borrow.java
+++ b/src/servlet/reader/Borrow.java
@@ -25,93 +25,93 @@ import net.sf.json.JSONObject;
 public class Borrow extends HttpServlet {
 	@Override
 	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+		//设置响应内容类型为JSON，编码格式为UTF-8
 		resp.setContentType("application/json; charset=utf8");
-		// 接收参数
-		String limit = req.getParameter("limit");
-		String page = req.getParameter("page");
-		String condition = (String) req.getParameter("condition");
-		String conditionValue = (String) req.getParameter("conditionValue");
-		String where = ""; // 无限制条件
+		// 接收分页参数
+		String limit = req.getParameter("limit"); // 每页显示记录数
+		String page = req.getParameter("page"); // 当前页码
+		String condition = (String) req.getParameter("condition"); // 查询条件字段名
+		String conditionValue = (String) req.getParameter("conditionValue"); // 查询条件值
+		String where = ""; // 初始化查询条件字符串
 		if (page == null) {
-			page = "1";
+			page = "1"; // 默认第一页
 		}
 		if (limit == null) {
-			limit = "10";
+			limit = "10"; // 默认每页显示10条记录
 		}
-		// 准备查询
+		// 准备数据库连接和查询对象
 		Connection connection = null;
 		PreparedStatement pstmt = null;
 		PreparedStatement countPstmt = null;
 		ResultSet resultSet = null;
 		ResultSet countSet = null;
-		String sql = "";
-		String countSql = "";
-		// 准备返回参数
-		int code = 1;
-		String msg = "无数据";
-		int count = 0;
+		String sql = ""; // SQL查询语句
+		String countSql = ""; // 统计总数SQL查询语句
+		// 返回结果的参数
+		int code = 1; // 状态码，1表示失败，0表示成功
+		String msg = "无数据"; // 返回消息
+		int count = 0; // 总记录数
 
-		HttpSession session = req.getSession();
+		HttpSession session = req.getSession(); // 获取用户会话
 
-		JSONObject jsonData = new JSONObject();
-		JSONArray jsonArray = new JSONArray();
-		JSONObject jsonResult = new JSONObject();
-		// 进行查询
+		JSONObject jsonData = new JSONObject(); // JSON对象，存储单条记录数据
+		JSONArray jsonArray = new JSONArray(); // JSON数组，存储多条记录数据
+		JSONObject jsonResult = new JSONObject(); // JSON对象，存储最终返回结果
+		// 执行查询操作
 		try {
-			connection = (Connection) Base.getConnection();
-			sql = "select * from borrow_books where card_id = " + session.getAttribute("reader");
+			connection = (Connection) Base.getConnection(); // 获取数据库连接
+			sql = "select * from borrow_books where card_id = " + session.getAttribute("reader"); // 构建基本查询语句
 			if (condition != null && conditionValue != null && !condition.equals("") && !conditionValue.equals("")) {
-				where = " and " + condition + " like '%" + conditionValue + "%' ";
-				sql += where;
+				where = " and " + condition + " like '%" + conditionValue + "%' "; // 添加查询条件
+				sql += where; // 拼接完整查询语句
 			}
-			sql += " limit ?,?";// 1 10 (1-1)*10
-			System.out.println("???" + sql);
-			pstmt = connection.prepareStatement(sql);
-			pstmt.setInt(1, (Integer.parseInt(page) - 1) * Integer.parseInt(limit));
-			pstmt.setInt(2, Integer.parseInt(limit));
-			resultSet = pstmt.executeQuery();
+			sql += " limit ?,?"; // 添加分页限制
+			System.out.println("???" + sql); // 打印SQL查询语句（调试用）
+			pstmt = connection.prepareStatement(sql); // 预编译SQL查询语句
+			pstmt.setInt(1, (Integer.parseInt(page) - 1) * Integer.parseInt(limit)); // 设置第一个参数：起始位置
+			pstmt.setInt(2, Integer.parseInt(limit)); // 设置第二个参数：每页显示记录数
+			resultSet = pstmt.executeQuery(); // 执行查询，获取结果集
 			while (resultSet.next()) {
-				jsonData.put("id", resultSet.getString("id"));
-				jsonData.put("card_id", resultSet.getString("card_id"));
-				jsonData.put("book_id", resultSet.getString("book_id"));
-				jsonData.put("borrow_date", resultSet.getString("borrow_date"));
-				jsonData.put("end_date", resultSet.getString("end_date"));
-				jsonData.put("return_date", resultSet.getString("return_date"));
-				jsonArray.add(jsonData);
+				jsonData.put("id", resultSet.getString("id")); // 获取并存储记录ID
+				jsonData.put("card_id", resultSet.getString("card_id")); // 获取并存储读者ID
+				jsonData.put("book_id", resultSet.getString("book_id")); // 获取并存储书籍ID
+				jsonData.put("borrow_date", resultSet.getString("borrow_date")); // 获取并存储借阅日期
+				jsonData.put("end_date", resultSet.getString("end_date")); // 获取并存储到期日期
+				jsonData.put("return_date", resultSet.getString("return_date")); // 获取并存储归还日期
+				jsonArray.add(jsonData); // 将记录添加到JSON数组中
 			}
-			countSql = "select count(*) as count from borrow_books where card_id = "
-					+ req.getSession().getAttribute("reader");
-			countSql += where;
-			countPstmt = connection.prepareStatement(countSql);
-			countSet = countPstmt.executeQuery();
+			countSql = "select count(*) as count from borrow_books where card_id = " + req.getSession().getAttribute("reader"); // 构建统计总数SQL查询语句
+			countSql += where; // 拼接查询条件
+			countPstmt = connection.prepareStatement(countSql); // 预编译统计总数SQL查询语句
+			countSet = countPstmt.executeQuery(); // 执行查询，获取结果集
 			if (countSet.next()) {
-				count = countSet.getInt("count");
+				count = countSet.getInt("count"); // 获取总记录数
 			}
-			if (!jsonArray.isEmpty()) {
-				code = 0;
-				msg = "查询成功";
+			if (!jsonArray.isEmpty()) { // 如果JSON数组不为空，表示有数据
+				code = 0; // 设置状态码为0，表示成功
+				msg = "查询成功"; // 设置返回消息为“查询成功”
 			}
 
-		} catch (ClassNotFoundException e) {
-			msg = "class没找到";
-		} catch (SQLException e) {
-			msg = "sql错误";
-		} finally {
+		} catch (ClassNotFoundException e) { // 捕获类未找到异常
+			msg = "class没找到"; // 设置返回消息为“class没找到”
+		} catch (SQLException e) { // 捕获SQL异常
+			msg = "sql错误"; // 设置返回消息为“sql错误”
+		} finally { // 最终块，用于关闭资源
 			try {
-				Base.closeResource(null, pstmt, resultSet);
-				Base.closeResource(connection, countPstmt, countSet);
-			} catch (SQLException e) {
-				msg = "关闭资源失败";
+				Base.closeResource(null, pstmt, resultSet); // 关闭查询语句和结果集
+				Base.closeResource(connection, countPstmt, countSet); // 关闭数据库连接和统计结果集
+			} catch (SQLException e) { // 捕获SQL异常
+				msg = "关闭资源失败"; // 设置返回消息为“关闭资源失败”
 			}
 
 		}
-		// 返回数据
-		jsonResult.put("code", code);
-		jsonResult.put("count", count);
-		jsonResult.put("msg", msg);
-		jsonResult.put("data", jsonArray.toArray());
-		PrintWriter out = resp.getWriter();
-		out.print(jsonResult.toString());
+		// 将结果封装成JSON对象并输出到响应中
+		jsonResult.put("code", code); // 添加状态码到JSON对象中
+		jsonResult.put("count", count); // 添加总记录数到JSON对象中
+		jsonResult.put("msg", msg); // 添加返回消息到JSON对象中
+		jsonResult.put("data", jsonArray.toArray()); // 添加数据数组到JSON对象中
+		PrintWriter out = resp.getWriter(); // 获取响应输出流
+		out.print(jsonResult.toString()); // 输出JSON结果到响应中
 	}
 
 }
diff --git a/src/servlet/reader/Exit.java b/src/servlet/reader/Exit.java
index 3ea6660..ef7d40a 100644
--- a/src/servlet/reader/Exit.java
+++ b/src/servlet/reader/Exit.java
@@ -19,11 +19,14 @@ public class Exit extends HttpServlet {
 	@Override
 	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 		// TODO Auto-generated method stub
+		// 获取当前请求的会话对象。如果会话不存在，则创建一个新的会话。
 		HttpSession session = req.getSession();
+		// 检查会话中是否存在名为 "reader" 的属性。
 		if (session.getAttribute("reader") != null) {
+			// 如果存在，则移除该属性。
 			session.removeAttribute("reader");
 		}
+		// 重定向到指定的 JSP 页面。
 		resp.sendRedirect(req.getContextPath() + "/reader/04readerFrame.jsp");
 	}
-
 }
diff --git a/src/servlet/reader/Illegal.java b/src/servlet/reader/Illegal.java
index fc8ad5e..5bb3b4e 100644
--- a/src/servlet/reader/Illegal.java
+++ b/src/servlet/reader/Illegal.java
@@ -25,52 +25,66 @@ import net.sf.json.JSONObject;
 public class Illegal extends HttpServlet {
 	@Override
 	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+		// 设置响应内容类型为 JSON，并指定字符编码为 UTF-8
 		resp.setContentType("application/json; charset=utf8");
-		// 接收参数
-		String limit = req.getParameter("limit");
-		String page = req.getParameter("page");
-		String condition = (String) req.getParameter("condition");
-		String conditionValue = (String) req.getParameter("conditionValue");
-		String where = ""; // 无限制条件
+
+		// 接收请求参数
+		String limit = req.getParameter("limit"); // 每页显示记录数
+		String page = req.getParameter("page"); // 当前页码
+		String condition = (String) req.getParameter("condition"); // 查询条件字段
+		String conditionValue = (String) req.getParameter("conditionValue"); // 查询条件值
+		String where = ""; // 初始化查询条件字符串
+
+		// 如果未提供分页参数，则使用默认值
 		if (page == null) {
-			page = "1";
+			page = "1"; // 默认第一页
 		}
 		if (limit == null) {
-			limit = "10";
+			limit = "10"; // 默认每页显示10条记录
 		}
-		// 准备查询
+
+		// 准备数据库连接和查询对象
 		Connection connection = null;
 		PreparedStatement pstmt = null;
 		PreparedStatement countPstmt = null;
 		ResultSet resultSet = null;
 		ResultSet countSet = null;
-		String sql = "";
-		String countSql = "";
-		// 准备返回参数
-		int code = 1;
-		String msg = "无数据";
-		int count = 0;
-		HttpSession session = req.getSession();
+		String sql = ""; // SQL 查询语句
+		String countSql = ""; // 统计总记录数的 SQL 查询语句
+
+		// 准备返回结果的参数
+		int code = 1; // 状态码，1表示失败，0表示成功
+		String msg = "无数据"; // 返回消息
+		int count = 0; // 总记录数
+		HttpSession session = req.getSession(); // 获取会话对象
 
+		// 用于存储查询结果的 JSON 对象和数组
 		JSONObject jsonData = new JSONObject();
 		JSONArray jsonArray = new JSONArray();
 		JSONObject jsonResult = new JSONObject();
-		// 进行查询
+
+		// 进行数据库查询操作
 		try {
+			// 获取数据库连接
 			connection = (Connection) Base.getConnection();
-			sql = "select * from borrow_books where ILLEGAL is not null and length(trim(illegal))>0 AND CARD_ID = "
-					+ session.getAttribute("reader");
+			// 构建 SQL 查询语句，查询借阅记录中存在违规信息的记录
+			sql = "select * from borrow_books where ILLEGAL is not null and length(trim(illegal))>0 AND CARD_ID = " + session.getAttribute("reader");
+			// 如果提供了查询条件，则添加到 SQL 查询语句中
 			if (condition != null && conditionValue != null && !condition.equals("") && !conditionValue.equals("")) {
 				where = " and " + condition + " like '%" + conditionValue + "%' ";
 				sql += where;
 			}
-			sql += " limit ?,?";// 1 10 (1-1)*10
-			System.out.println("???" + sql);
+			// 添加分页限制条件
+			sql += " limit ?,?"; // 例如：limit 1,10 (1-1)*10
+			System.out.println("???" + sql); // 打印 SQL 查询语句（调试用）
 			pstmt = connection.prepareStatement(sql);
+			// 设置分页参数，计算起始位置和每页记录数
 			pstmt.setInt(1, (Integer.parseInt(page) - 1) * Integer.parseInt(limit));
 			pstmt.setInt(2, Integer.parseInt(limit));
+			// 执行查询并处理结果集
 			resultSet = pstmt.executeQuery();
 			while (resultSet.next()) {
+				// 将查询结果集中的每一行数据存入 JSON 对象中，并添加到 JSON 数组中
 				jsonData.put("id", resultSet.getString("id"));
 				jsonData.put("card_id", resultSet.getString("card_id"));
 				jsonData.put("book_id", resultSet.getString("book_id"));
@@ -81,39 +95,39 @@ public class Illegal extends HttpServlet {
 				jsonData.put("manager_id", resultSet.getString("manager_id"));
 				jsonArray.add(jsonData);
 			}
-			countSql = "select count(*) as count from borrow_books where ILLEGAL is not null and length(trim(illegal))>0 AND CARD_ID = "
-					+ session.getAttribute("reader");
+			// 构建统计总记录数的 SQL 查询语句，并执行查询以获取总记录数
+			countSql = "select count(*) as count from borrow_books where ILLEGAL is not null and length(trim(illegal))>0 AND CARD_ID = " + session.getAttribute("reader");
 			countSql += where;
 			countPstmt = connection.prepareStatement(countSql);
 			countSet = countPstmt.executeQuery();
 			if (countSet.next()) {
-				count = countSet.getInt("count");
+				count = countSet.getInt("count"); // 获取总记录数
 			}
+			// 如果查询结果不为空，则更新状态码和消息
 			if (!jsonArray.isEmpty()) {
-				code = 0;
+				code = 0; // 查询成功
 				msg = "查询成功";
 			}
-
 		} catch (ClassNotFoundException e) {
-			msg = "class没找到";
+			msg = "class没找到"; // 捕获类未找到异常并设置错误消息
 		} catch (SQLException e) {
-			msg = "sql错误";
+			msg = "sql错误"; // 捕获 SQL 异常并设置错误消息
 		} finally {
+			// 关闭数据库资源
 			try {
 				Base.closeResource(null, pstmt, resultSet);
 				Base.closeResource(connection, countPstmt, countSet);
 			} catch (SQLException e) {
-				msg = "关闭资源失败";
+				msg = "关闭资源失败"; // 捕获关闭资源时的异常并设置错误消息
 			}
-
 		}
-		// 返回数据
-		jsonResult.put("code", code);
-		jsonResult.put("count", count);
-		jsonResult.put("msg", msg);
-		jsonResult.put("data", jsonArray.toArray());
-		PrintWriter out = resp.getWriter();
-		out.print(jsonResult.toString());
+		// 将查询结果封装到 JSON 对象中并返回给客户端
+		jsonResult.put("code", code); // 状态码
+		jsonResult.put("count", count); // 总记录数
+		jsonResult.put("msg", msg); // 返回消息
+		jsonResult.put("data", jsonArray.toArray()); // 查询结果数据
+		PrintWriter out = resp.getWriter(); // 获取输出流对象
+		out.print(jsonResult.toString()); // 输出 JSON 字符串作为响应
 	}
 
 }
diff --git a/src/servlet/reader/ReaderLogin.java b/src/servlet/reader/ReaderLogin.java
index ed3b2ba..480f831 100644
--- a/src/servlet/reader/ReaderLogin.java
+++ b/src/servlet/reader/ReaderLogin.java
@@ -25,15 +25,18 @@ public class ReaderLogin extends HttpServlet {
 
 	protected void doPost(HttpServletRequest request, HttpServletResponse response)
 			throws ServletException, IOException {
-		// 设置头文件
+		// 设置响应内容类型和字符编码
 		response.setContentType("application/json; charset=utf8");
 		PrintWriter out = response.getWriter();
-		// 获取账号密码
+
+		// 获取请求参数中的账号和密码
 		String user = request.getParameter("user");
 		String psw = request.getParameter("psw");
-		// 设置响应map
+
+		// 创建一个HashMap用于存储响应数据
 		HashMap<String, Object> hashMap = new HashMap<String, Object>();
 
+		// 创建Reader对象并调用其login方法进行登录验证
 		Reader reader = new Reader();
 		String result = null;
 		try {
@@ -41,18 +44,23 @@ public class ReaderLogin extends HttpServlet {
 		} catch (ClassNotFoundException | SQLException e) {
 			e.printStackTrace();
 		}
+
+		// 根据登录结果设置响应数据
 		if (result != null && result.equals("1")) {
+			// 登录成功，创建会话并设置相关属性
 			HttpSession session = request.getSession();
 			session.setAttribute("reader", user);
-			session.setAttribute("reader_first", "1"); // 登录
-			hashMap.put("code", 0);
-			hashMap.put("msg", "登录成功");
-			hashMap.put("url", request.getContextPath() + "/reader/01main.jsp");
+			session.setAttribute("reader_first", "1"); // 标记为首次登录
+			hashMap.put("code", 0); // 状态码0表示成功
+			hashMap.put("msg", "登录成功"); // 提示信息
+			hashMap.put("url", request.getContextPath() + "/reader/01main.jsp"); // 跳转页面
 		} else {
-			hashMap.put("code", 1);
-			hashMap.put("msg", result);
+			// 登录失败，设置错误信息
+			hashMap.put("code", 1); // 状态码1表示失败
+			hashMap.put("msg", result); // 错误信息
 		}
-		// response.sendRedirect(request.getContextPath() +"/test.jsp");
+
+		// 将响应数据转换为JSON格式并输出
 		JSONObject json = JSONObject.fromObject(hashMap);
 		out.write(json.toString());
 
