From 9970f4fa46f8c48dd48120448def50d88cdd8a04 Mon Sep 17 00:00:00 2001
From: yizhiyun <2094853677@qq.com>
Date: Wed, 29 May 2024 10:59:37 +0800
Subject: [PATCH] =?UTF-8?q?feat:=E4=BD=9C=E4=B8=9A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../SJK.java"                                 | 77 +++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 "work/com/java/minxi/java_20240524/java_2302_\346\230\223\345\277\227\346\230\200_2344310235/SJK.java"

diff --git "a/work/com/java/minxi/java_20240524/java_2302_\346\230\223\345\277\227\346\230\200_2344310235/SJK.java" "b/work/com/java/minxi/java_20240524/java_2302_\346\230\223\345\277\227\346\230\200_2344310235/SJK.java"
new file mode 100644
index 0000000..18e7ff0
--- /dev/null
+++ "b/work/com/java/minxi/java_20240524/java_2302_\346\230\223\345\277\227\346\230\200_2344310235/SJK.java"
@@ -0,0 +1,77 @@
+package com.java.minxi.java_20240524.java_2302_易志昀_2344310235;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+
+public class SJK {
+    public class Main {
+        public static void main(String[] args) throws Exception{
+            Main_1();
+            Main_2();
+            Main_3();
+        }
+
+        private  static void Main_3() throws Exception{
+            String url="jdbc:mysql://student?serverTimezone=Asia/Shanghai";
+            String username="root";
+            String password="123456";
+            Connection connection= DriverManager.getConnection(url,username,password);
+            String sql="update teacher_info set teacher_name='小严' where id=3;";
+            Statement statement=connection.createStatement();
+            int i=statement.executeUpdate(sql);
+            if (i>0){
+                System.out.println("修改成功");
+            }else{
+                System.out.println("修改失败");
+            }
+            statement.close();
+            connection.close();
+        }
+        private  static void Main_2() throws Exception{
+            String url="jdbc:mysql://student?serverTimezone=Asia/Shanghai";
+            String username="root";
+            String password="123456";
+            Connection connection= DriverManager.getConnection(url,username,password);
+            String sql="select* from teacher_info where id=1 && teacher_age=35";
+            Statement statement= connection.createStatement();
+            ResultSet resultSet=statement.executeQuery(sql);
+            System.out.println("id为1，且年龄为35岁的用户：");
+            System.out.println("id\t\t teacher_name\t teacher_age");
+            while(resultSet.next()){
+                int id=resultSet.getInt(1);
+                String name=resultSet.getString(2);
+                int age=resultSet.getInt(3);
+                System.out.println(id+"\t\t"+name+"\t\t\t"+age);
+            }
+            System.out.println();
+            resultSet.close();
+            statement.close();
+            connection.close();
+        }
+
+        private  static void Main_1() throws Exception{
+            String url="jdbc:mysql://student?serverTimezone=Asia/Shanghai";
+            String username="root";
+            String password="123456";
+            Connection connection= DriverManager.getConnection(url,username,password);
+            String sql="select*from teacher_info ;";
+            Statement statement=connection.createStatement();
+            ResultSet resultSet=statement.executeQuery(sql);
+            System.out.println("所有用户信息");
+            System.out.println("id\t\t teacher_name\t teacher_age");
+            while (resultSet.next()){
+                int id=resultSet.getInt("id");
+                String name=resultSet.getNString("teacher_name");
+                int age=resultSet.getInt("teacher_age");
+                System.out.println(id+"\t\t"+name+"\t\t"+age);
+            }
+            System.out.println();
+            resultSet.close();
+            statement.close();
+            connection.close();
+
+        }
+    }
+
+}
-- 
Gitee