1.开发一个程序，用于记录车辆购置税。要求如下。
>由控制台录入数据，提交后保存到MySQL数据库。
>需要保存的信息：车主身份证号码（18位），车辆识别代码（17位），车辆排量，官方指导价，发票价格，缴纳车辆购置税金额。
>目前车辆购置税征收办法如下。
1.车辆购置税征收额根据计税价格计算，计税价格计算公式如下。
计税价格=购车发票价格 / （1+17%）
2.排量在1.6L及以下的车型的计算公式如下。
车辆购置税=计税价格*7.5%
3.排量在1.6L及以上的车型的计算公式如下。
车辆购置税=计税价格*10%
package dome_kehozuoye;
/**
* 实体类
* @author
*
*/
public class Car {
private String identity;//车主身份证号码
private String heading;//车辆识别码
private double emissions;//车辆排量
private double price;//官方指导价
private double invoice;//发票价格
private double purchase;//缴纳车辆购税价
public String getIdentity() {
return identity;
}
public void setIdentity(String identity) {
this.identity = identity;
}
public String getHeading() {
return heading;
}
public void setHeading(String heading) {
this.heading = heading;
}
public double getEmissions() {
return emissions;
}
public void setEmissions(double emissions) {
this.emissions = emissions;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public double getInvoice() {
return invoice;
}
public void setInvoice(double invoice) {
this.invoice = invoice;
}
public double getPurchase() {
return purchase;
}
public void setPurchase(double purchase) {
this.purchase = purchase;
}
}
package dome_kehozuoye;
/*
* 接口
*/
public interface CarDao {
int save(Car car); //添加
}
package dome_kehozuoye;
/*
* 驱动
*/
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class BaseDao {
private String driver="com.mysql.jdbc.Driver";//数据库驱动字符串
private String url="jdbc:mysql://localhost:3306/inquire?characterEncoding=utf-8";
private String user="root";//数据库名
private String password="123";
Connection conn=null;
//1.打开数据库
public Connection getConnection() {
try {
Class.forName(driver);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
conn=DriverManager.getConnection(url,user,password);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
//2.关闭
public void closeAll(Connection conn,PreparedStatement stmt,ResultSet rs) {
if(rs!=null) {
try {
rs.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(stmt!=null) {
try {
stmt.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(conn!=null) {
try {
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
public int executeUpdate(String sql,Object[] param) {
int num=0;//影响行数
conn=this.getConnection();
PreparedStatement stmt =null;
try {
stmt =conn.prepareStatement(sql);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(param!=null) {
for (int i = 0; i < param.length; i++) {
try {
stmt.setObject(i+1, param[i]);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
try {
return num=stmt.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
closeAll(conn, stmt, null);
}
return num;
}
}
package dome_kehozuoye;
/**
* 实现继承BaseDao接口CarDao类
* @author
*
*/
public class CarDaoImpl extends BaseDao implements CarDao{
@Override
//保存信息
public int save(Car car) {
// TODO Auto-generated method stub
String sql = "insert into Car(identity,heading,emissions,price,invoice,purchase) values(?,?,?,?,?,?)";
Object[] param = {car.getIdentity(),car.getHeading(),car.getEmissions(),car.getPrice(),car.getInvoice(),car.getPurchase()};
int result = executeUpdate(sql, param);
return result;
}
}
package dome_kehozuoye;
import java.util.Scanner;
/*
* 测试类
*/
public class Test {
public static void main(String[] args) {
Car car = new Car(); //调用实体类
CarDao cardao = new CarDaoImpl();//调用实现接口
Scanner scanner = new Scanner(System.in);//键盘输入
System.out.println("记录车辆购置税，请按提示录入相关信息：");
System.out.print("请输入车主省份证号码(18位)：");
String identity =scanner.nextLine();
while(identity.length()!=18) {
System.out.println("对不起！输入有误，请重新输入：");
identity =scanner.nextLine();
}
System.out.print("请输入车辆识别码(17位)：");
String heading = scanner.nextLine();
while(heading.length()!=17) {
System.out.print("对不起！输入有误，请重新输入：");
heading =scanner.nextLine();
}
System.out.print("请输入车辆排量：");
double emissions =scanner.nextDouble();
System.out.print("请输入官方指导价：");
double price =scanner.nextDouble();
System.out.print("请输入发票价格：");
double invoice =scanner.nextDouble();
double taxable =0.0;
double purchase = 0.0;
taxable = invoice/(1+0.17);
if(emissions<1.6) {
purchase = taxable*0.075;
}else {
purchase = taxable*0.1;
}
car.setEmissions(emissions);//传参
car.setHeading(heading);
car.setIdentity(identity);
car.setInvoice(invoice);
car.setPrice(price);
car.setPurchase(purchase);
cardao.save(car);
System.out.println("数据保存成功,车辆购置税为"+purchase);//打印购置税
}
}