From b4f17c86292a9817a2a032a579a6b5d0bd48e0db Mon Sep 17 00:00:00 2001
From: weixinqing <3382534560@qq.com>
Date: Tue, 28 May 2024 20:42:50 +0800
Subject: [PATCH] =?UTF-8?q?feat:=E6=8F=90=E4=BA=A4=E4=BD=9C=E4=B8=9A?=
 =?UTF-8?q?=E4=BB=A3=E7=A0=81?=
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Content-Type: text/plain; charset=UTF-8
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---
 .../JDBCdemo.java"                            | 106 ++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 "work/com/java/minxi/java_20240524/java_2302_\351\255\217\346\226\260\351\235\222_2344310226/JDBCdemo.java"

diff --git "a/work/com/java/minxi/java_20240524/java_2302_\351\255\217\346\226\260\351\235\222_2344310226/JDBCdemo.java" "b/work/com/java/minxi/java_20240524/java_2302_\351\255\217\346\226\260\351\235\222_2344310226/JDBCdemo.java"
new file mode 100644
index 0000000..082c3c5
--- /dev/null
+++ "b/work/com/java/minxi/java_20240524/java_2302_\351\255\217\346\226\260\351\235\222_2344310226/JDBCdemo.java"
@@ -0,0 +1,106 @@
+package com.java.minxi.java_20240524.java_2302_魏新青_2344310226;
+
+import sun.applet.resources.MsgAppletViewer;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+import java.util.Map;
+
+
+public class JDBCdemo {
+    public static void main(String[] args) {
+
+
+
+//更新
+        Connection coon = null;
+        Statement stmt = null;
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+            String url = "jdbc:mysql://127.0.0.1:3306/student?serverTimezone=Asia/Shanghai";
+            String userName = "root";
+            String passWord = "123456";
+            coon = DriverManager.getConnection(url, userName, passWord);
+            String sql = "update teacher_info set teacher_name = '喵喵' where id = 1;";
+            stmt = coon.createStatement();
+            int count = stmt.executeUpdate(sql);
+            if (count > 0) {
+                System.out.println("执行成功");
+            } else {
+                System.out.println("执行失败");
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                if (null != stmt) {
+                    stmt.close();
+                }
+                if (null != coon) {
+                    coon.close();
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+
+//查询
+        ResultSet resultSet=null;
+
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+            String url = "jdbc:mysql://127.0.0.1:3306/student?serverTimezone=Asia/Shanghai";
+            String userName = "root";
+            String passWord = "123456";
+             coon = DriverManager.getConnection(url, userName, passWord);
+            String sql = "select id,teacher_name,teacher_age from teacher_info;";
+             stmt = coon.createStatement();
+            resultSet = stmt.executeQuery(sql);
+            while (resultSet.next()) {
+                int id = resultSet.getInt("id");
+                String teacher_name = resultSet.getString("teacher_name");
+                int teacher_age = resultSet.getInt("teacher_age");
+
+                System.out.println(id);
+                System.out.println(teacher_name);
+                System.out.println(teacher_age);
+            }
+
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+            String url = "jdbc:mysql://127.0.0.1:3306/student?serverTimezone=Asia/Shanghai";
+            String userName = "root";
+            String passWord = "123456";
+            coon = DriverManager.getConnection(url, userName, passWord);
+            String sql = "select * from teacher_info where id=1 and teacher_age=35;";
+            stmt = coon.createStatement();
+            resultSet = stmt.executeQuery(sql);
+            while (resultSet.next()) {
+                int id = resultSet.getInt("id");
+                String teacher_name = resultSet.getString("teacher_name");
+                int teacher_age = resultSet.getInt("teacher_age");
+
+                System.out.println(id);
+                System.out.println(teacher_name);
+                System.out.println(teacher_age);
+            }
+
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+
+
+
+
+
+}
+}
+
-- 
Gitee