JDBC实现学生管理系统

JDBC实现学生管理系统

本文实例为大家分享了JDBC实现学生管理系统的具体代码，供大家参考，具体内容如下

1、学生类

package manage;

import java.util.Date;

/**

* @author fanxf

* @since 2018/4/27 17:01

*/

public class Student {

private int id;

private int age;

private String sex;

private String name;

private Date dateCreated;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public String getSex() {

return sex;

}

public void setSex(String sex) {

this.sex = sex;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Date getDateCreated() {

return dateCreated;

}

public void setDateCreated(Date dateCreated) {

this.dateCreated = dateCreated;

}

public Student() {

}

public Student(int age, String sex, String name) {

this.age = age;

this.sex = sex;

this.name = name;

}

public Student(int id, int age, String sex, String name) {

this.id = id;

this.age = age;

this.sex = sex;

this.name = name;

}

@Override

public String toString() {

returnhttp:// "Student{" +

"id=" + id +

", age=" + age +

", sex='" + sex + '\'' +

", name='" + name + '\'' +

", dateCreated=" + dateCreated +

'}';

}

}

2、jdbc工具类

package manage;

import java.io.IOException;

import java.sql.*;

import java.util.Properties;

/**

* @author fanxf

* @since 2018/4/27 11:06

*/

//数据库的工具类

public class JdbcUtils {

private static String driver = "";

private static String url = "";

private static String user = "";

private static String password = "";

static {

Properties p = new Properties();

try {

p.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("db.properties"));

} catch (IOException e) {

e.printStackTrace();

}

driver = p.getProperty("driver");

url = p.getProperty("url");

user = p.getProperty("user");

password = p.getProperty("password");

try {

Class.forName(driver);

} catch (ClassNotFoundException e) {

e.printStackTrace();

}

}

public static Connection getConnection() {

try {

return DriverManager.getConnection(url, user, password);

} catch (SQLException e) {

e.printStackTrace();

}

return null;

}

//释放的时候要从小到大释放

//Connection -> Statement --> Resultset

public static void release(ResultSet rs, Statement stmt, Connection conn) {

if (rs != null) {

try {

rs.close();

} catch (SQLException e) {

e.printStackTrace();

}

}

if (stmt != null) {

try {

stmt.close();

} catch (SQLException e) {

e.printStackTrace();

}

}

if (conn != null) {

try {

conn.close();

} catch (SQLException e) {

e.printStackTrace();

}

}

}

}

3、代码

package manage;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.Scanner;

/**

* @author fanxf

* @since 2018/4/27 17:06

*/

public class ManageSystem {

private static Connection conn = null;

private static PreparedStatement ps = null;

private static ResultSet rs = null;

/**

* 添加学生数据

*

* @param student

* @return

*/

public static int addStudent(Student student) {

conn = JdbcUtils.getConnection();

int result = 0;

try {

ps = conn.prepareStatement("INSERT INTO student (age, sex, `name`, dateCreated) VALUES (?, ?, ?, now())");

ps.setInt(1, student.getAge()); //设置第一个参数

ps.setString(2, student.getSex()); //设置第二个参数

ps.setString(3, student.getName()); //设置第三个参数

result = ps.executeUpdate();

} catch (SQLException e) {

e.printStackTrace();

} finally {

JdbcUtils.release(null, ps, conn); //关闭连接

}

return result;

}

public void add() {

Scanner scan = new Scanner(System.in);

System.out.println("请输入学生年龄");

int age = scan.nextInt();

System.out.println("请输入学生性别");

String sex = scan.next();

System.out.println("请输入学生姓名");

String name = scan.next();

Student s = new Student(age, sex, name);

int flag = addStudent(s);

if (flag > 0) {

System.out.println("添加成功");

} else {

System.out.println("添加失败");

}

}

/**

* 修改

*

* @param student

* @return

*/

public static int updateStudent(Student student) {

conn = JdbcUtils.getConnection();

int result = 0;

try {

ps = conn.prepareStatement("UPDATE student SET age = ?, sex = ?, `name` = ? WHERE id = ?");

ps.setInt(1, student.getAge()); //设置第一个参数

ps.setString(2, student.getSex()); //设置第二个参数

ps.setString(3, student.getName()); //设置第三个参数

ps.setInt(4, student.getId());

result = ps.executeUpdate();

} catch (SQLException e) {

e.printStackTrace();

} finally {

JdbcUtils.release(null, ps, conn); //关闭连接

}

return result;

}

public void update() {

Scanner scan = new Scanner(System.in);

System.out.println("请输入学生id");

int id = scan.nextInt();

System.out.println("请输入学生年龄");

int age = scan.nextInt();

System.out.println("请输入学生性别");

String sex = scan.next();

System.out.println("请输入学生姓名");

String name = scan.next();

Student s = new Student(id, age, sex, name);

int flag = updateStudent(s);

if (flag > 0) {

System.out.println("更新成功");

} else {

System.out.println("更新失败");

}

}

/**

* 删除

*

* @param id

* @return

*/

public static int deleteStudent(int id) {

conn = JdbcUtils.getConnection();

int result = 0;

try {

ps = conn.prepareStatement("DELETE FROM student WHERE id = ?");

ps.setInt(1, id); //设置第一个参数

result = ps.executeUpdate();

} catch (SQLException e) {

e.printStackTrace();

} finally {

JdbcUtils.release(null, ps, conn); //关闭连接

}

return result;

}

public void delete() {

Scanner scan = new Scanner(System.in);

System.out.println("请输入学生id");

int id = scan.nextInt();

int flag = deleteStudent(id);

if (flag > 0) {

System.out.println("删除成功");

} else {

System.out.println("删除失败");

}

}

public static void main(String[] args) {

System.out.println("************ 欢迎进入学生管理系统 *************");

ManageSystem ms = new ManageSystem();

boolean b = true;

while (b) {

System.out.println("你想进行以下哪项操作");

System.out.println("1、添加学生 2、更新学生数据 3、学生信息查询 4、删除学生 0、退出");

Scanner scan = new Scanner(System.in);

int i = scan.nextInt();

switch (i) {

case 1:

ms.add();

break;

case 2:

ms.update();

break;

case 3:

System.out.println();

break;

case 4:

ms.delete();

break;

default:

System.out.println("没有该操作选项,请重新来过！");

main(args);

break;

}

}

}

}

4、properties数据库文件自己配置

数据库字段根据学生类建立！

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