From d49105ac71e6311e2fbec7b0ee8d0913fc4d36e8 Mon Sep 17 00:00:00 2001
From: Administrator <2012447976@qq,com>
Date: Tue, 28 May 2024 19:58:24 +0800
Subject: [PATCH] =?UTF-8?q?feat:=E6=8F=90=E4=BA=A4=E4=BD=9C=E4=B8=9A?=
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---
 .../Jdbc.java"                                | 89 +++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 "work/com/java/minxi/java_20240524/java_\345\247\232\347\277\224\347\277\224_2344310201/Jdbc.java"

diff --git "a/work/com/java/minxi/java_20240524/java_\345\247\232\347\277\224\347\277\224_2344310201/Jdbc.java" "b/work/com/java/minxi/java_20240524/java_\345\247\232\347\277\224\347\277\224_2344310201/Jdbc.java"
new file mode 100644
index 0000000..3b8fd22
--- /dev/null
+++ "b/work/com/java/minxi/java_20240524/java_\345\247\232\347\277\224\347\277\224_2344310201/Jdbc.java"
@@ -0,0 +1,89 @@
+package com.java.minxi.java_20240524.java_姚翔翔_2344310201;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+public class Jdbc{
+    public static void main(String[] args) throws Exception {
+        Demo1();
+        Demo2();
+        Demo3();
+    }
+
+    private static void Demo3() throws Exception{
+        String url = "jdbc:mysql:///student?serverTimezone=Asia/Shanghai";
+        String username = "root";
+        String password = "123456";
+        Connection conn = DriverManager.getConnection(url, username, password);
+
+        String sql = "update teacher_info set teacher_name = '小严' where id = 3;";
+
+        Statement stmt = conn.createStatement();
+
+        int i = stmt.executeUpdate(sql);
+        if (i>0){
+            System.out.println("修改成功");
+        }else{
+            System.out.println("修改失败");
+        }
+
+        stmt.close();
+        conn.close();
+    }
+
+    private static void Demo2() throws Exception{
+        String url = "jdbc:mysql:///student?serverTimezone=Asia/Shanghai";
+        String username = "root";
+        String password = "123456";
+        Connection conn = DriverManager.getConnection(url, username, password);
+
+        String sql = "select * from teacher_info where id = 1 && teacher_age = 35;";
+
+        Statement stmt = conn.createStatement();
+        ResultSet resultSet = stmt.executeQuery(sql);
+
+        System.out.println("id为1，且年龄为35岁的用户:");
+        System.out.println("id\t\tteacher_name\tteacher_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();
+        stmt.close();
+        conn.close();
+    }
+
+    public static void Demo1() throws Exception{
+
+        String url = "jdbc:mysql:///student?serverTimezone=Asia/Shanghai";
+        String username = "root";
+        String password = "123456";
+        Connection conn = DriverManager.getConnection(url, username, password);
+
+        String sql = "select * from teacher_info;";
+
+        Statement stmt = conn.createStatement();
+
+        ResultSet resultSet = stmt.executeQuery(sql);
+
+
+        System.out.println("所有用户信息:");
+        System.out.println("id\t\tteacher_name\tteacher_age");
+        while (resultSet.next()){
+            int id = resultSet.getInt("id");
+            String name = resultSet.getString("teacher_name");
+            int age = resultSet.getInt("teacher_age");
+
+            System.out.println(id+"\t\t"+name+"\t\t\t"+age);
+        }
+        System.out.println();
+
+        resultSet.close();
+        stmt.close();
+        conn.close();
+    }
+}
+
-- 
Gitee