欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

JDBC实现学生管理系统

程序员文章站 2024-02-19 21:41:46
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.u...

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() {
    return "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!

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。