Update UpdateUserServlet.java

src/main/java/cn/train/controller/UpdateUserServlet.java

@@ -1,43 +1,47 @@
-package cn.train.controller;
+package cn.train.controller; // 定义控制器包
 
-import java.io.IOException;
+import java.io.IOException; // 导入IOException
+import javax.servlet.ServletException; // 导入ServletException
+import javax.servlet.annotation.WebServlet; // 导入@WebServlet注解
+import javax.servlet.http.HttpServlet; // 导入HttpServlet
+import javax.servlet.http.HttpServletRequest; // 导入HttpServletRequest
+import javax.servlet.http.HttpServletResponse; // 导入HttpServletResponse
 
-import javax.servlet.ServletException;
-import javax.servlet.annotation.WebServlet;
-import javax.servlet.http.HttpServlet;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
+import cn.train.model.UserTable; // 导入UserTable模型
+import cn.train.service.UserTableService; // 导入UserTableService服务
 
-import cn.train.model.UserTable;
-import cn.train.service.UserTableService;
-@WebServlet("/UpdateUserServlet")
+@WebServlet("/UpdateUserServlet") // 注册Servlet，定义访问路径为/UpdateUserServlet
 public class UpdateUserServlet extends HttpServlet {
 	
-	
+	// 处理GET请求的方法
 	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 		
-		String uname=req.getParameter("name");
-		int state=Integer.parseInt(req.getParameter("userstate"));
-		UserTableService userService=new UserTableService();
-		UserTable usertable=new UserTable();
+		// 从请求中获取用户名和用户状态参数
+		String uname = req.getParameter("name");
+		int state = Integer.parseInt(req.getParameter("userstate"));
+		// 创建UserTableService实例
+		UserTableService userService = new UserTableService();
+		// 创建UserTable对象
+		UserTable usertable = new UserTable();
+		// 设置UserTable对象的用户名和状态
 		usertable.setUname(uname);
 		usertable.setState(state);
 		
+		// 调用服务层方法更新用户信息，返回更新结果
+		boolean flag = userService.updateUserTab(usertable);
 		
-		boolean flag=userService.updateUserTab(usertable);
-		
-		
+		// 如果更新成功，转发到UserTableServlet
 		if (flag) {
 			req.getRequestDispatcher("UserTableServlet").forward(req, resp);
-		}else{
+		} else { // 如果更新失败，重定向到updateuser.jsp页面
 			resp.sendRedirect("back/updateuser.jsp");
 		}
 	
 	}
 	
-	
+	// 处理POST请求的方法，与GET请求处理相同
 	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-		doGet(req,resp);
+		doGet(req, resp); // 直接调用doGet方法
 	}
 
 }