From 9d23ec4af05cc779bb5b5b7cd7a91045dfe2c7d7 Mon Sep 17 00:00:00 2001 From: Administrator <2954205479@qq.com> Date: Wed, 22 May 2024 17:28:46 +0800 Subject: [PATCH 1/2] =?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 --- .../Datemain.java" | 3 +++ .../Mathmain.java" | 9 +++++---- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git "a/work/com/java/minxi/java_20240516/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Datemain.java" "b/work/com/java/minxi/java_20240516/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Datemain.java" index 642359d..90d7cf0 100644 --- "a/work/com/java/minxi/java_20240516/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Datemain.java" +++ "b/work/com/java/minxi/java_20240516/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Datemain.java" @@ -11,6 +11,9 @@ public class Datemain { //编写一个程序，创建一个 `Date` 对象，表示当前时间。 Date date = new Date(); System.out.println("当前时间为:"+date); + //老师的方法:Date date = new Date(); + // int year = date.getYear(); + // System.out.println(year+1900); //创建一个方法，接受一个 `Date` 对象作为参数，返回该日期的年份、月份和天数。 LocalDate date1 = LocalDate.now(); diff --git "a/work/com/java/minxi/java_20240516/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Mathmain.java" "b/work/com/java/minxi/java_20240516/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Mathmain.java" index 407d039..219ed5d 100644 --- "a/work/com/java/minxi/java_20240516/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Mathmain.java" +++ "b/work/com/java/minxi/java_20240516/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Mathmain.java" @@ -6,16 +6,17 @@ public class Mathmain { public static void main(String[] args) { //编写一个程序，接受一个用户输入的数字，然后输出该数字的绝对值。 Scanner scanner = new Scanner(System.in); - System.out.println("请输入数字:"); - int num = scanner.nextInt(); - System.out.println("该数字的绝对值是:" + Math.abs(num)); + System.out.println("请输入一个数字:"); + int z = scanner.nextInt(); + int abs = Math.abs(z); + System.out.println("绝对值为:"+abs); //创建一个方法，接受三个整数作为参数，返回这三个整数中的最小值和最大值。 int a = 5; int b = 8; int c = 11; int min = Math.min(a,Math.min(b,c)); - int max = Math.min(a,Math.max(b,c)); + int max = Math.max(a,Math.max(b,c)); System.out.println("最小值是:"+min+"，最大值是"+max); //编写一个程序，接受一个浮点数作为输入，并将其四舍五入到最近的整数。 -- Gitee From 3ab9afcafe6e34cfe9d42c546b00ece5e9a638d8 Mon Sep 17 00:00:00 2001 From: jiayi <2963735891@qq.com> Date: Tue, 28 May 2024 21:26:28 +0800 Subject: [PATCH 2/2] =?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 --- .../Main.java" | 109 ++++++++++++++++++ 1 file changed, 109 insertions(+) create mode 100644 "work/com/java/minxi/java_20240524/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Main.java" diff --git "a/work/com/java/minxi/java_20240524/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Main.java" "b/work/com/java/minxi/java_20240524/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Main.java" new file mode 100644 index 0000000..b0fc080 --- /dev/null +++ "b/work/com/java/minxi/java_20240524/java_2302_\347\216\213\345\230\211\344\273\252_2344310207/Main.java" @@ -0,0 +1,109 @@ +package com.java.minxi.java_20240524.java_2302_王嘉仪_2344310207; + +import javax.xml.transform.Result; +import java.sql.*; + +public class Main { + public static void main(String[] args) { + teacher1(); + teacher2(); + teacher3(); + } + + public static void teacher1(){ + //查询所有用户信息； + Connection connection = null; + Statement statement = null; + try{ + Class.forName("com.mysql.cj.jdbc.Driver"); + String URL = "jdbc:mysql://localhost:3306/student?serverTimezone=Asia/Shanghai"; + String username = "root"; + String password = "123456"; + Connection conn = DriverManager.getConnection(URL,username,password); + String sql = "select id,teacher_name,teache_age from teacher_info"; + Statement stmt = conn.createStatement(); + ResultSet rs = stmt.executeQuery(sql); + while(rs.next()){ + int id = rs.getInt("id"); + String teacher_name = rs.getNString("teacher_name"); + int teache_age = rs.getInt("teache_age"); + + System.out.println(id); + System.out.println(teacher_name); + System.out.println(teache_age); + } + rs.close(); + stmt.close(); + conn.close(); + } + catch (Exception e){ + e.printStackTrace(); + } + } + + public static void teacher2(){ + //查询所有用户信息； + Connection connection = null; + Statement statement = null; + try{ + Class.forName("com.mysql.cj.jdbc.Driver"); + String URL = "jdbc:mysql://localhost:3306/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 and teache_age=35"; + Statement stmt = conn.createStatement(); + ResultSet rs = stmt.executeQuery(sql); + while(rs.next()){ + int id = rs.getInt("id"); + String teacher_name = rs.getNString("teacher_name"); + int teache_age = rs.getInt("teache_age"); + + System.out.println(id); + System.out.println(teacher_name); + System.out.println(teache_age); + } + rs.close(); + stmt.close(); + conn.close(); + } + catch (Exception e){ + e.printStackTrace(); + } + } + + public static void teacher3(){ + //查询所有用户信息； + Connection connection = null; + Statement statement = null; + try { + Class.forName("com.mysql.cj.jdbc.Driver"); + String URL = "jdbc:mysql://localhost:3306/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 rs = stmt.executeUpdate(sql); + + if (rs>0){ + System.out.println("执行成功"); + }else { + System.out.println("执行失败"); + } + }catch(Exception e){ + e.printStackTrace(); + }finally { + try{ + statement.close(); + connection.close(); + }catch (Exception e){ + e.printStackTrace(); + } + } + + } +} + + + -- Gitee