student类
package com.xfb.student;
import java.sql.*;
import java.util.Scanner;
public class Student {
private String name;
private int age;
private String sex;
private int classno;
private String addr;
private int row;
private String forName="com.mysql.jdbc.Driver";
private String url="jdbc:mysql://localhost:3306/kaoshi?characterEncoding=utf8";
private String user="root";
private String password="admin";
Scanner scanner=new Scanner(System.in);
Connection conn=null;
Statement stm=null;
ResultSet rs=null;
public int insertStudent() throws SQLException{
try {
Class.forName(forName);
conn=DriverManager.getConnection(url, user, password);
stm=conn.createStatement();
System.out.println("请输入学生姓名");
name=scanner.next();
System.out.println("请输入学生年龄");
age=scanner.nextInt();
System.out.println("请输入学生性别");
sex=scanner.next();
System.out.println("请输入学生班级");
classno=scanner.nextInt();
System.out.println("请输入学生住址");
addr=scanner.next();
String sql="insert into tab_student(stu_name,stu_age,stu_sex,tab_classes_id,stu_addr)"
+" values('"+name+"','"+age+"','"+sex+"','"+classno+"','"+addr+"')";
row=stm.executeUpdate(sql, Statement.RETURN_GENERATED_KEYS);
rs=stm.getGeneratedKeys();
System.out.println("成功插入："+row+"条");
if (rs.next()) {
return rs.getInt(1);
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}finally{
conn.close();
stm.close();
rs.close();
}
return -1;
}
public void delStudent(){
try {
Class.forName(forName);
conn=DriverManager.getConnection(url, user, password);
stm=conn.createStatement();
System.out.println("请输入要删除的学生姓名");
name=scanner.next();
String sql="delete from tab_student where stu_name='"+name+"'";
int row=stm.executeUpdate(sql, Statement.RETURN_GENERATED_KEYS);
System.out.println("已删除"+row+"条");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
public void updateStudent(){
try {
Class.forName(forName);
conn=DriverManager.getConnection(url, user, password);
stm=conn.createStatement();
System.out.println("请输入修改后的学生姓名");
name=scanner.next();
System.out.println("请输入修改后的学生年龄");
age=scanner.nextInt();
System.out.println("请输入修改后的学生性别");
sex=scanner.next();
System.out.println("请输入修改后的学生班级");
classno=scanner.nextInt();
System.out.println("请输入修改后的学生住址");
String addr=scanner.next();
String sql="update tab_student set stu_name='"+name+"',stu_age='"+age+"',stu_sex='"+sex+"',tab_classes_id='"+classno+"',stu_addr='"+addr+"' where stu_name='"+name+"'";
int row = stm.executeUpdate(sql,Statement.RETURN_GENERATED_KEYS);
System.out.println("已更新"+row+"条");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
public void selectStudent(){
try {
Class.forName(forName);
conn=DriverManager.getConnection(url, user, password);
System.out.println("请输入要查找的学生姓名");
name=scanner.next();
stm=conn.createStatement();
String sql="select * from tab_student where stu_name='"+name+"'";
rs=stm.executeQuery(sql);
if(rs.next()){
System.out.println("姓名："+rs.getString("stu_name")+" 年龄："+rs.getInt("stu_age")+" 性别："+rs.getString("stu_sex")+" 班级："+rs.getInt("tab_classes_id")+" 住址："+rs.getString("stu_addr"));
}else{
System.out.println("查无此人");
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
public void selectAllStudent(){
try {
Class.forName(forName);
conn=DriverManager.getConnection(url, user, password);
stm=conn.createStatement();
String sql="select * from tab_student";
rs=stm.executeQuery(sql);
while(rs.next()){
System.out.println("姓名："+rs.getString("stu_name")+" 年龄："+rs.getInt("stu_age")+" 性别："+rs.getString("stu_sex")+" 班级："+rs.getInt("tab_classes_id")+" 住址："+rs.getString("stu_addr"));
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
main函数
package com.xfb.student;
import java.sql.SQLException;
import java.util.Scanner;
public class TestStudent {
public static void main(String[] args) throws SQLException, ClassNotFoundException {
Student stu=new Student();
Scanner scanner=new Scanner(System.in);
System.out.println("欢迎使用学生管理系统");
int num=0;
while(true){
System.out.println("请输入要执行的操作:1、添加学生 2、删除学生 3、修改学生 4、查找学生 5、查看全部学生");
num=scanner.nextInt();
if (num==1) {
int key=stu.insertStudent();
if (key>0) {
System.out.println("新增成功");
}else if( key < 0){
System.out.println("新增失败");
}
}else if (num==2) {
stu.delStudent();
}else if (num==3) {
stu.updateStudent();
}else if (num==4){
stu.selectStudent();
}else if (num==5){
stu.selectAllStudent();
}
System.out.println("要继续操作吗？ 是/否");
String str=scanner.next();
if (str.equals("否")) {
System.out.println("谢谢使用!拜拜~");
break;
}
}
}
}