diff --git "a/work/com/java/minxi/java_20240524/java_2302_\350\203\241\350\216\271\350\216\271_2344310238/Student.java" "b/work/com/java/minxi/java_20240524/java_2302_\350\203\241\350\216\271\350\216\271_2344310238/Student.java" new file mode 100644 index 0000000000000000000000000000000000000000..2a92fa9db31e74724bd5e0049f94470a22c356ca --- /dev/null +++ "b/work/com/java/minxi/java_20240524/java_2302_\350\203\241\350\216\271\350\216\271_2344310238/Student.java" @@ -0,0 +1,41 @@ +package com.java.minxi.java_20240524.java_2302_胡莹莹_2344310238; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.ResultSet; +import java.sql.Statement; + +public class Student { + public static void main(String[] args) { + Connection conn = 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"; + conn = DriverManager.getConnection(url, userName, password); + String sql = "select * from teacher_info"; + String sql2 ="select * from teacher_info where id = 1 && teacher_age =35"; + stmt = conn.createStatement(); + ResultSet resultSet = stmt.executeQuery(sql); + 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\t"+age); + } + } + catch (Exception e){ + e.printStackTrace(); + }finally { + try { + stmt.close(); + conn.close(); + }catch (Exception e){ + e.printStackTrace(); + } + } + } +} diff --git "a/work/com/java/minxi/java_20240524/java_2302_\350\203\241\350\216\271\350\216\271_2344310238/druip.java" "b/work/com/java/minxi/java_20240524/java_2302_\350\203\241\350\216\271\350\216\271_2344310238/druip.java" new file mode 100644 index 0000000000000000000000000000000000000000..4d41ebeb10fb186d4000794c975a1b2829e94664 --- /dev/null +++ "b/work/com/java/minxi/java_20240524/java_2302_\350\203\241\350\216\271\350\216\271_2344310238/druip.java" @@ -0,0 +1,34 @@ +package com.java.minxi.java_20240524.java_2302_胡莹莹_2344310238; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.Statement; + +public class druip { + public static void main(String[] args) { + Connection conn = null; + Statement stmt = null; + try{ + String url = "jdbc:mysql://127.0.0.1:3306/student?serverTimezone=Asia/Shanghai"; + String userName = "root"; + String password = "123456"; + conn = DriverManager.getConnection(url,userName,password); + stmt = conn.createStatement(); + String sql ="update teacher_info set teacher_name ='小严' where id = 3"; + int count = stmt.executeUpdate(sql); + if (count > 0) { + System.out.println("执行成功"); + } + } + catch (Exception e){ + e.printStackTrace(); + }finally { + try { + stmt.close(); + conn.close(); + }catch (Exception e){ + e.printStackTrace(); + } + } + } + } diff --git "a/work/com/java/minxi/java_20240524/java_2302_\350\203\241\350\216\271\350\216\271_2344310238/er.java" "b/work/com/java/minxi/java_20240524/java_2302_\350\203\241\350\216\271\350\216\271_2344310238/er.java" new file mode 100644 index 0000000000000000000000000000000000000000..a1dccf1e78680d0b3decc1beec7bd97aa708e223 --- /dev/null +++ "b/work/com/java/minxi/java_20240524/java_2302_\350\203\241\350\216\271\350\216\271_2344310238/er.java" @@ -0,0 +1,40 @@ +package com.java.minxi.java_20240524.java_2302_胡莹莹_2344310238; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.ResultSet; +import java.sql.Statement; + +public class er { + public static void main(String[] args) { + Connection conn = 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"; + conn = DriverManager.getConnection(url, userName, password); + String sql ="select * from teacher_info where id = 1 && teacher_age =35"; + stmt = conn.createStatement(); + ResultSet resultSet = stmt.executeQuery(sql); + 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\t"+age); + } + } + catch (Exception e){ + e.printStackTrace(); + }finally { + try { + stmt.close(); + conn.close(); + }catch (Exception e){ + e.printStackTrace(); + } + } + } +}