java6.17上午实训总结
1.本次实训的最终目的是为了编写一个完整的学生管理系统
为了之后码程序的时候能够有更加清晰的思路
首先，我们需要绘制一下结构图来了解学生管理系统应该实现那些功能
2.创建数据库，编写部分测试代码
（1）.创建学生表student
（2）.创建用户表user
（3）.创建校表college
（4）.创建状态表status
（5）.四张表创建完成之后，我们为表插入简单的几条数据，如下：
好啦数据插入工作就简单的完成啦
3、在项目里创建文件夹help、images、lib
4.实体类
（1）创建学校Student实体类
package net.qt.student.bean;
/**
* 包名：net.qt.student.bean
* 类名：Student
* 作者：谯婷
* 日期：2019.6.17
*/
public class Student {
private String id;
private String name;
private String sex;
private String age;
private String department;
private String clazz;
private String telephone;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getDepartment() {
return department;
}
public void setDepartment(String department) {
this.department = department;
}
public String getClazz() {
return clazz;
}
public void setClazz(String clazz) {
this.clazz = clazz;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
@Override
public String toString() {
return "Student{" +
"id='" + id + '\'' +
", name='" + name + '\'' +
", sex='" + sex + '\'' +
", age='" + age + '\'' +
", department='" + department + '\'' +
", clazz='" + clazz + '\'' +
", telephone='" + telephone + '\'' +
'}';
}
}
（2）创建用户实体User类
package net.qt.student.bean;
/**
* 包名：net.qt.student.bean
* 类名：User
* 作者：谯婷
* 日期：2019.6.17
*/
public class User {
private int id;
private String username;
private String password;
private String telephone;
private String registerTime;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
public String getRegisterTime() {
return registerTime;
}
public void setRegisterTime(String registerTime) {
this.registerTime = registerTime;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
", telephone='" + telephone + '\'' +
", registerTime='" + registerTime + '\'' +
'}';
}
}
（3）.创建学校实体College类
package net.qt.student.bean;
/**
* 包名：net.qt.student.bean
* 类名：College
* 作者：谯婷
* 日期：2019.6.17
*/
import com.sun.org.apache.xalan.internal.lib.ExsltDatetime;
public class College {
private int id;
private String name;
private String president;
private ExsltDatetime startTime;
private String telephone;
private String emial;
private String address;
private String profile;
//通过ALT+Insert实现set+get方法
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPresident() {
return president;
}
public void setPresident(String president) {
this.president = president;
}
public ExsltDatetime getStartTime() {
return startTime;
}
public void setStartTime(ExsltDatetime startTime) {
this.startTime = startTime;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
public String getEmial() {
return emial;
}
public void setEmial(String emial) {
this.emial = emial;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getProfile() {
return profile;
}
public void setProfile(String profile) {
this.profile = profile;
}
//alt+insert然后选择tostring
@Override
public String toString() {
return "College{" +
"id=" + id +
", name='" + name + '\'' +
", president='" + president + '\'' +
", startTime=" + startTime +
", telephone='" + telephone + '\'' +
", emial='" + emial + '\'' +
", address='" + address + '\'' +
", profile='" + profile + '\'' +
'}';
}
}
（4）.创建状态实体Status类
package net.qt.student.bean;
/**
* 包名：net.qt.student.bean
* 类名：Status
* 作者：谯婷
* 日期：2019.6.17
*/
public class Status{
private int id;
private String college;
private String version;
private String author;
private String telephone;
private String address;
private String emils;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCollege() {
return college;
}
public void setCollege(String college) {
this.college = college;
}
public String getVersion() {
return version;
}
public void setVersion(String version) {
this.version = version;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getEmils() {
return emils;
}
public void setEmils(String emils) {
this.emils = emils;
}
@Override
public String toString() {
return "Status{" +
"id=" + id +
", college='" + college + '\'' +
", version='" + version + '\'' +
", author='" + author + '\'' +
", telephone='" + telephone + '\'' +
", address='" + address + '\'' +
", emils='" + emils + '\'' +
'}';
}
}
通过这几个实体类的创建，更加加深了我对alt+insert的方法的熟练度
5、数据库连接管理类ConnectionManager
package net.qt.student.dbutil;
import javax.swing.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
/**
* 包名：net.qt.student.dbutil
* 类名：ConnectionManager
* 作者：谯婷
* 描述：数据库连接管理类
* 日期：2019.6.17
*/
public class ConnectionManager {
/**
* 数据库驱动程序
*/
private static final String DRIVER = "com.mysql.jdbc.Driver";
/**
* 数据库统一资源标识符
*/
private static final String URL = "jdbc:mysql://localhost:3306/student";
/**
* 数据库用户名
*/
private static final String USERNAME = "root";
/**
* 数据库密码
*/
private static final String PASSWORD = "1";
/**
* 私有化构造方法，拒绝实例化
*/
private ConnectionManager(){
}
/**
* 获得数据库连接
* @return 数据库连接对象
*/
public static Connection getConnection(){
//定义数据库连接
Connection conn = null;
try {
//安装数据库驱动程序
Class.forName(DRIVER);
//获得数据库连接
conn = DriverManager.getConnection(URL
+"?useUnicode=true&characterEncoding=UTF8",USERNAME,PASSWORD);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
//返回数据库连接
return conn;
}
/**
* 关闭数据库连接
* @param conn
*/
public static void closeConnection(Connection conn){
//判断数据库连接是否为空
if (conn != null){
//判断数据库连接是否关闭
try {
if (!conn.isClosed()){
//关闭数据库连接
conn.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
/**
* 测试数据库连接是否成功
* @param args
*/
public static void main(String[] args){
//获得数据库连接
Connection conn = getConnection();
//判断是否连接成功
if (conn != null){
JOptionPane.showMessageDialog(null,"恭喜，数据库连接成功");
}else{
//if ...else 中可以将行复制在内容使用ctrl+shift+光标键上下移动整行
JOptionPane.showMessageDialog(null,"遗憾，数据库连接失败");
}
//关闭数据库
closeConnection(conn);
}
}
运行程序，测试数据库连接是否成功
6.数据访问接口
稍微小小的总结一下：第一天实训java,这样和老师一起做项目的感觉真好，有不懂的就可以问，这样以前上课没听懂的内容就又可以好好补一补了，接下来的几天一定要把这么乐观好奇的心态保持下去！加油哈哈哈~