archieve: homework7 UserDao

2025-05-26 16:17:32 +08:00
parent f65b48b374
commit fb4ff04aac
7 changed files with 100 additions and 72 deletions
@@ -0,0 +1,53 @@
+/*
+ * @name: UsersDao.java
+ * @author: msksbr
+ * @date: 2025-05-26
+ * @version: 1.0
+ * @description: UsersDao class for homework 7
+ */
+package com.msksbr.homework7.dao;
+
+import com.msksbr.homework7.domain.User;
+import com.msksbr.homework7.util.JDBCUtils;
+
+import java.sql.ResultSet;
+
+public class UsersDao {
+    private final JDBCUtils jdbcUtils = new JDBCUtils();
+    private User user = new User();
+
+    public void addUser(User user) {
+        this.user = user;
+        String sql = "INSERT INTO users (username, password, email, birthday) VALUES ('" + user.getUsername() + "', '" + user.getPassword() + "', '" + user.getEmail() + "', '" + user.getBirthday() + "')";
+        jdbcUtils.runQuery(sql);
+    }
+
+    public void deleteUser(int id) {
+        String sql = "DELETE FROM users WHERE id = " + id;
+        jdbcUtils.runQuery(sql);
+    }
+
+    public void updateUser(User user) {
+        this.user = user;
+        String sql = "UPDATE users SET username = '" + user.getUsername() + "', password = '" + user.getPassword() + "', email = '" + user.getEmail() + "', birthday = '" + user.getBirthday() + "' WHERE id = " + user.getId();
+        jdbcUtils.runQuery(sql);
+    }
+
+    public User findUserById(int id) {
+        String sql = "SELECT * FROM users WHERE id = " + id;
+        ResultSet rs = jdbcUtils.runQuery(sql);
+        try {
+            if (rs.next()) {
+                user.setId(rs.getInt("id"));
+                user.setUsername(rs.getString("username"));
+                user.setPassword(rs.getString("password"));
+                user.setEmail(rs.getString("email"));
+                user.setBirthday(rs.getDate("birthday"));
+            }
+            return user;
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+}
@@ -2,7 +2,7 @@
 * @name: JDBCUtils.java
 * @author: msksbr
 * @date: 2025-05-26
- * @version: 1.0
+ * @version: 1.0f: fix yaml file load issue
 * @description: JDBCUtils class for homework 7
 */
 package com.msksbr.homework7.util;