添加用户登录

src/com/hellogithub/dao/AdminDao.java

@@ -0,0 +1,4 @@
+package com.hellogithub.dao;
+
+public class AdminDao {
+}

src/com/hellogithub/dao/UserDao.java

@@ -0,0 +1,48 @@
+package com.hellogithub.dao;
+
+import com.hellogithub.entity.UserEntity;
+import com.hellogithub.utils.JdbcUtils;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+/**
+ * 用户Dao层
+ * */
+public class UserDao {
+    private UserEntity userEntity=new UserEntity();
+
+    /**
+     * 用户登录
+     * @param userName
+     * @param userPassword
+     * */
+    public UserEntity UserLogin(String userName,String userPassword){
+        ResultSet resultSet = null;
+        PreparedStatement preparedStatement = null;
+        Connection connection = null;
+        try {
+            connection = JdbcUtils.getConnection();
+            String loginSql = "select  * from  user where userName=? and userPassword=? and isValid=1;";
+            preparedStatement = connection.prepareStatement(loginSql);
+            preparedStatement.setString(1, userName);
+            preparedStatement.setString(2, userPassword);
+            resultSet = preparedStatement.executeQuery();
+            if (!resultSet.next()) {  // 查询不到用户数据
+                return null;
+            }
+            // 将db中数据 返回给客户端 查询到数据
+            Integer id = resultSet.getInt(1);
+            String dbUserName = resultSet.getString(2);
+            String dbUserPassword = resultSet.getString(3);
+            UserEntity userEntity = new UserEntity(dbUserName, dbUserPassword);
+            return userEntity;
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        } finally {
+            JdbcUtils.closeConnection(resultSet, preparedStatement, connection);
+        }
+    }
+}

src/com/hellogithub/entity/AdminEntity.java

@@ -0,0 +1,4 @@
+package com.hellogithub.entity;
+
+public class AdminEntity {
+}

src/com/hellogithub/entity/UserEntity.java

@@ -0,0 +1,107 @@
+package com.hellogithub.entity;
+
+import java.sql.Date;
+
+/**
+ * 用户实体层
+ */
+public class UserEntity {
+    /**
+     * CREATE TABLE `user` (
+     * `userId` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户ID',
+     * `userName` varchar(255) DEFAULT NULL COMMENT '用户名',
+     * `userPassword` varchar(255) DEFAULT NULL COMMENT '密码',
+     * `creatTime` datetime DEFAULT NULL COMMENT '创建时间',
+     * `isValid` int(11) DEFAULT NULL COMMENT '是否有效(0/1)',
+     * `projectNum` int(11) DEFAULT NULL COMMENT '提交的项目总数',
+     * PRIMARY KEY (`userId`)
+     * ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COMMENT='用户表';
+     */
+    private Integer userId;
+    private String userName;
+    private String userPassword;
+
+    private Date creatTime;
+
+    private Integer isValid;
+
+    private Integer projectNum;
+
+    public UserEntity() {
+
+    }
+
+    public UserEntity(String userName, String userPassword) {
+        this.userName=userName;
+        this.userPassword=userPassword;
+    }
+
+    public Integer getUserId() {
+        return userId;
+    }
+
+    public void setUserId(Integer userId) {
+        this.userId = userId;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public String getUserPassword() {
+        return userPassword;
+    }
+
+    public void setUserPassword(String userPassword) {
+        this.userPassword = userPassword;
+    }
+
+    public Date getCreatTime() {
+        return creatTime;
+    }
+
+    public void setCreatTime(Date creatTime) {
+        this.creatTime = creatTime;
+    }
+
+    public Integer getIsValid() {
+        return isValid;
+    }
+
+    public void setIsValid(Integer isValid) {
+        this.isValid = isValid;
+    }
+
+    public Integer getProjectNum() {
+        return projectNum;
+    }
+
+    public void setProjectNum(Integer projectNum) {
+        this.projectNum = projectNum;
+    }
+
+    public UserEntity(Integer userId, String userName, String userPassword, Date creatTime, Integer isValid, Integer projectNum) {
+        this.userId = userId;
+        this.userName = userName;
+        this.userPassword = userPassword;
+        this.creatTime = creatTime;
+        this.isValid = isValid;
+        this.projectNum = projectNum;
+    }
+
+    @Override
+    public String toString() {
+        return "UserEntity{" +
+                "userId=" + userId +
+                ", userName='" + userName + '\'' +
+                ", userPassword='" + userPassword + '\'' +
+                ", creatTime=" + creatTime +
+                ", isValid=" + isValid +
+                ", projectNum=" + projectNum +
+                '}';
+    }
+}

src/com/hellogithub/filter/SessionFilter.java

@@ -14,7 +14,7 @@ import java.io.IOException;
  */
 @WebFilter("/system/*")// 过滤器所有的请求
 public class SessionFilter implements Filter {
-    private String[] excludeUrls = new String[]{"/VerifycodeServlet"}; //过滤器排除的请求url 格式:”/login“
+    private String[] excludeUrls = new String[]{"/VerifycodeServlet","/userLogin"}; //过滤器排除的请求url 格式:”/login“
 
     /**
      * 过滤器

src/com/hellogithub/service/AdminService.java

@@ -0,0 +1,4 @@
+package com.hellogithub.service;
+
+public class AdminService {
+}

src/com/hellogithub/service/UserService.java

@@ -0,0 +1,14 @@
+package com.hellogithub.service;
+
+import com.hellogithub.dao.UserDao;
+import com.hellogithub.entity.UserEntity;
+
+/**
+ * 用户Service层
+ * */
+public class UserService {
+    private UserDao userDao=new UserDao();
+    public UserEntity UserLogin(String userName, String userPassword){
+        return userDao.UserLogin(userName,userPassword);
+    }
+}

src/com/hellogithub/servlet/UserLoginServlet.java

@@ -0,0 +1,86 @@
+package com.hellogithub.servlet;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.entity.UserEntity;
+import com.hellogithub.service.UserService;
+import com.hellogithub.utils.RandomValidateCode;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.*;
+import org.apache.commons.lang3.StringUtils;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.HashMap;
+
+@WebServlet("/userLogin")
+public class UserLoginServlet extends HttpServlet {
+    private UserService userService = new UserService();
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        doPost(req,resp);
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        PrintWriter writer =resp.getWriter();
+        String userName = req.getParameter("username");
+        if (StringUtils.isEmpty(userName)) {
+            setResultError("用户名称不能够是为空",writer);
+            return;
+        }
+        String userPwd = req.getParameter("password");
+        // 参数验证
+        if (StringUtils.isEmpty(userPwd)) {
+            //转发到错误页面
+            setResultError("密码不能够是为空",writer);
+            return;
+        }
+        String userCode = req.getParameter("code"); // 用户输入的图形验证码
+        // 从session中获取图形验证码
+        HttpSession session = req.getSession();
+        String sessionCode = (String) session.getAttribute(RandomValidateCode.RANDOMVALIDATECODE);
+        if (!sessionCode.equalsIgnoreCase(userCode)) {
+            setResultError("验证码不能够是为空",writer);
+            return;
+        }
+        // 在调用业务逻辑层
+        UserEntity adminUserEntity = userService.UserLogin(userName, userPwd);
+        if (adminUserEntity == null) {
+            // 用户名称或者密码错误!
+            setResultError("用户名或者密码错误！！！",writer);
+            return;
+        }
+        // 判断用户是否记住密码
+        String rememberPassword = req.getParameter("remember");
+        if ("on".equals(rememberPassword)) {
+            // 如果有记住密码则 将密码保存在cookie中
+            Cookie userNameCookie = new Cookie("userName", userName);
+            Cookie userPwdCookie = new Cookie("userPwd", userPwd);
+            resp.addCookie(userNameCookie);
+            resp.addCookie(userPwdCookie);
+        }
+        // 能够db中查询到对象 登录成功了  将用户数据存放在session中
+        session = req.getSession();
+        session.setAttribute("user", adminUserEntity);
+        setResultOK("登录成功！",writer);
+    }
+
+    public void setResult(Integer code, String msg, PrintWriter writer) {
+        HashMap<String, Object> result = new HashMap<>();
+        result.put("code", code);
+        result.put("msg", msg);
+        String jsonString = JSONObject.toJSONString(result);
+        writer.println(jsonString);
+        writer.close();
+    }
+
+    public void setResultError(String msg, PrintWriter writer) {
+        setResult(500, msg, writer);
+    }
+
+    public void setResultOK(String msg, PrintWriter writer) {
+        setResult(200, msg, writer);
+    }
+}