数据库学生管理系统(StudentManagerSystemDB_V1.0)

package cn.sxb.day1102;

public class Student {
private String name;
private int number;
private int age;
private int sex;//0:男  1：女

public Student(){

}
public Student(String name, int number, int age, int sex) {
this.name = name;
this.number = number;
this.age = age;
this.sex = sex;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public int getNumber() {
return number;
}

public void setNumber(int number) {
this.number = number;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

public int getSex() {
return sex;
}

public void setSex(int sex) {
this.sex = sex;
}
}

package cn.sxb.day1102;import java.sql.Connection;import java.sql.DriverManager;import java.sql.SQLException;public class UtilDB {private static final String URL = "jdbc:mysql://192.168.5.17:3306/db1606";private static final String USER = "test";private static final String PASSWORD = "123321";/*** 构造方法加载驱动*/public UtilDB() {try {Class.forName("com.mysql.jdbc.Driver");// 加载mysql驱动} catch (ClassNotFoundException e) {e.printStackTrace();}}/*** 建立连接数据库*/public Connection getConnection() {Connection connect = null;try {connect = DriverManager.getConnection(URL, USER, PASSWORD);//试图建立到给定数据库URL的连接if (connect == null) {System.out.println("数据库连接失败");} else {System.out.println("数据库连接成功");}} catch (SQLException e) {e.printStackTrace();}return connect;}/*** 关闭数据库连接*/public void closeConnection(Connection connect) {try {if (connect != null)connect.close();} catch (SQLException e) {e.printStackTrace();}}}

package cn.sxb.day1102;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;import java.util.Scanner;public class StudentDB extends UtilDB {public StudentDB() {}/*** 创建表*/public void createTable() {Statement statement = null;Connection connect = getConnection();try {String sql = "create table  studentThree (" + "id int(11) not null auto_increment  primary key," // 主键+ "name varchar(10) not null," // 姓名+ "number int(4)  not null," // 学号+ "age int(3)," // 年龄+ "sex int(1)" // 性别+ ")";statement = connect.createStatement();statement.execute(sql);//执行给定的sql语句} catch (SQLException e) {e.printStackTrace();} finally {try {if (statement != null)statement.close();} catch (SQLException e) {e.printStackTrace();}closeConnection(connect);}}/*** 向表中添加学生*/public void addStudent() {Student stu = new Student();Scanner scanner = new Scanner(System.in);System.out.println("请输入学生姓名：");String s = scanner.next();stu.setName(s);System.out.println("请输入学生学号：");stu.setNumber(scanner.nextInt());System.out.println("请输入学生年龄：");stu.setAge(scanner.nextInt());System.out.println("请输入学生性别：");stu.setSex(scanner.nextInt());Connection connect = getConnection();PreparedStatement ps = null;//sql语句被预编译并存储在PreparedStatement对象中String sql = "insert into studentThree(name,number,age,sex)values(?,?,?,?)";try {ps = connect.prepareStatement(sql); // 执行SQL语句ps.setString(1, stu.getName());ps.setInt(2, stu.getNumber());ps.setInt(3, stu.getAge());ps.setInt(4, stu.getSex());ps.execute();} catch (SQLException e) {e.printStackTrace();}finally{try {if(ps != null)ps.close();} catch (SQLException e) {e.printStackTrace();}closeConnection(connect);}}/*** 显示学生*/public void showStudent(){Connection connect = getConnection();Statement statement = null;try {statement = connect.createStatement();String sql = "select * from studentThree";ResultSet rs = statement.executeQuery(sql);//执行给定的sql语句，单个ResultSet对象//ResultSet表示数据库结果集的数据表，通常通过执行查询数据库的语句生成。System.out.println("姓名\t学号\t年龄\t性别");while (rs.next()) {String name = rs.getString("name");int number = rs.getInt("number");int age =rs.getInt("age");int sex = rs.getInt("sex");System.out.println(name + "\t" + number + "\t" + age + "\t" + sex);}} catch (SQLException e) {e.printStackTrace();} finally {try {if (statement != null)statement.close();} catch (SQLException e) {e.printStackTrace();}closeConnection(connect);}}/*** 查找学生*/public void selectStudent(){System.out.println("请输入查找的学生学号");Scanner scanner = new Scanner(System.in);int num = scanner.nextInt();Connection connect = getConnection();PreparedStatement ps = null;try {String sql = "select * from studentThree where number = ?";ps = connect.prepareStatement(sql);ps.setInt(1,num);ResultSet rs = ps.executeQuery();// 返回结果集while (rs.next()) {String name = rs.getString("name");int number = rs.getInt("number");int age =rs.getInt("age");int sex = rs.getInt("sex");System.out.println("你要查找的学生是："+name);}} catch (SQLException e) {e.printStackTrace();} finally {try {if (ps != null)ps.close();} catch (SQLException e) {e.printStackTrace();}closeConnection(connect);}}/*** 删除学生*/public void deleteStudent(){System.out.println("请输入删除的学生学号：");Scanner scanner = new Scanner(System.in);int num = scanner.nextInt();Connection connect = getConnection();PreparedStatement ps = null;try {String sql = "delete from studentThree where number = ?";ps = connect.prepareStatement(sql);ps.setInt(1,num);ps.execute();System.out.println("删除成功");} catch (SQLException e) {e.printStackTrace();} finally {try {if (ps != null)ps.close();} catch (SQLException e) {e.printStackTrace();}closeConnection(connect);}}//	public static void main(String[] args){//		StudentDB sdb = new StudentDB();//		sdb.createTable();////		sdb.keyBoard();////		sdb.addStudent(stu);////		sdb.showStudent();////		sdb.selectStudent();////		sdb.deleteStudent();////	}}

package cn.sxb.day1102;import java.util.Scanner;/*** 项目名称: 《学生信息管理系统》 英文:StudentManagerSystem版本号:   V1.0功能描术: 学生信息管理系统具有能对学生信息进行显示，添加，删除，查找(根据学号查找)，退出功能.要求：1>.创建一个学生类 Student至少包含：姓名(name)、学号(number)两个属性;在Student类中封装操作方法:添加学生(addStudent)、显示学生列表(showAllStudent)、删除学生(deleteStudent)查找学生(findStudentByNumber)、退出系统(exit)2>在添加，删除学生时要求检查该学生是否存在，如果不存在需给出提示。3>.通过输入命令进行交互操作,控制台输出效果如下：=====  欢迎进入《学生信息管理系统》！ ======1 添加学生,2 显示学生列表,3 删除学生,4 查找学生,5 退出<输入操作命令:>1======添加学生信息操作=========请输入姓名:小明请输入学号:1001======添加成功 ! 学生姓名是 :小明,学号是 : 1001=========<输入操作命令:>2姓名      学号小明     1001<输入操作命令:>4======查找学生信息操作=========请输入学号:1001===您查找的学生是:小明====<输入操作命令:>3======删除学生信息操作=========请输入学号:1001====删除学生成功!学号是:1001的学生已从学生管理系统中删除====<输入操作命令:>5==== 您已经退出《学生信息管理系统》  ====***/public class StudentTest {public static void main(String[] args) {StudentDB sdb = new StudentDB();System.out.println("=====欢迎进入学生管理系统=====");System.out.println(" 1 添加学生,2 显示学生列表,3 删除学生,4 查找学生,5 退出");Scanner scanner = new Scanner(System.in);System.out.println("=====添加学生信息操作=====");for(;;){System.out.println("<请输入操作命令:>");int num =scanner.nextInt();switch(num){case 1:sdb.addStudent();break;case 2:sdb.showStudent();break;case 3:sdb.deleteStudent();break;case 4:sdb.selectStudent();break;case 5:System.out.println("你已经退出系统！");System.exit(0);break;default :break;}}}}