比较满意设计的一次作业 JDBC宠物管理

package com.dao;

import java.util.List;

import com.entity.Master;

public interface MasterDao {
    public List<Master> findAll();
    public Master findByName(String name);
    public Master findByNameAndPwd(String name,String pwd);
}
package com.dao;

import java.util.List;

import com.entity.Pet_type;

public interface Pet_typeDao {
    public List<String> findAllName();
    public Pet_type findByName(String name);
}
package com.dao;

import com.entity.Pet;

public interface PetDao {
    public void save(Pet pet);
}

com.dao

package com.daoImpl;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.dao.MasterDao;
import com.entity.Master;
import com.util.JDBCTool;

public class MasterDaoImpl implements MasterDao {
    private ResultSet rs;
    @Override
    public List<Master> findAll() {
        String sql="SELECT * FROM master";
        rs=JDBCTool.Query(sql);
        ArrayList<Master> masterArray=new ArrayList<Master>();
        try{
            while(rs.next()){
                Master master=new Master();
                master.setId(rs.getInt(1));
                master.setLoginName(rs.getString(2));
                master.setPasswrod(rs.getString(3));
                masterArray.add(master);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return masterArray;
    }

    @Override
    public Master findByName(String name) {
        String sql="SELECT * FROM master WHERE loginname=?";
        rs=JDBCTool.Query(sql, name);
        Master master=new Master();
        try{
            master.setId(rs.getInt(1));
            master.setLoginName(rs.getString(2));
            master.setPasswrod(rs.getString(3));
        }catch(SQLException e){
            e.printStackTrace();
        }

        return master;
    }

    @Override
    public Master findByNameAndPwd(String name, String pwd) {
        String sql="SELECT * FROM master WHERE loginname=? AND password=?";
        rs=JDBCTool.Query(sql, name, pwd);
        Master m=new Master();
        try{
            if(!rs.next()){
                return null;
            }
            m.setId(rs.getInt(1));
            m.setLoginName(rs.getString(2));
            m.setPasswrod(rs.getString(3));
        }catch(SQLException e){
            e.printStackTrace();
        }
        return m;
    }

}
package com.daoImpl;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.dao.Pet_typeDao;
import com.entity.Pet_type;
import com.util.JDBCTool;

public class Pet_typeDaoImpl implements Pet_typeDao {
    private ResultSet rs;
    @Override
    public List<String> findAllName() {
        String sql="SELECT name FROM pet_type";
        ArrayList<String> names=new ArrayList<String>();
        rs=JDBCTool.Query(sql);
        try {
            while(rs.next()){
                names.add(rs.getString(1));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return names;
    }

    @Override
    public Pet_type findByName(String name)   {
        String sql="SELECT * FROM pet_type WHERE NAME=?";
        rs=JDBCTool.Query(sql, name);
        Pet_type pt=new Pet_type();
        try{
            if(rs.next()){
                pt.setId(rs.getInt(1));
                pt.setName(rs.getString(2));
            }
        }catch(SQLException e){
            e.printStackTrace();
        }
        return pt;
    }

}
package com.daoImpl;

import com.dao.PetDao;
import com.entity.Pet;
import com.util.JDBCTool;

public class PetDaoImpl implements PetDao {

    @Override
    public void save(Pet pet) {
        String sql="INSERT INTO pet (master_id,name,type_id,health,love,adopt_time)" +
                "VALUES (?,?,?,?,?,?)";
        String sql1="INSERT INTO pet (master_id,name,type_id,love,adopt_time)" +
        "VALUES (?,?,?,?,?)";
        if(pet.getHealth()==0){
            JDBCTool.DML(sql1, pet.getMaster_id(),pet.getName(),pet.getType_id(),pet.getLove(),pet.getAdopt_time());
        }else{
            JDBCTool.DML(sql, pet.getMaster_id(),pet.getName(),pet.getType_id(),pet.getHealth(),pet.getLove(),pet.getAdopt_time());
        }
    }

}

com.daoImpl

package com.entity;

public class Master {
    private int id;
    private String loginName;
    private String passwrod;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getLoginName() {
        return loginName;
    }
    public void setLoginName(String loginName) {
        this.loginName = loginName;
    }
    public String getPasswrod() {
        return passwrod;
    }
    public void setPasswrod(String passwrod) {
        this.passwrod = passwrod;
    }
    public Master(int id, String loginName, String passwrod) {
        super();
        this.id = id;
        this.loginName = loginName;
        this.passwrod = passwrod;
    }
    public Master() {
        super();
    }

}
package com.entity;

public class Pet_type {
    private int id;
    private String name;
    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 Pet_type() {
        super();
    }
    public Pet_type(int id, String name) {
        super();
        this.id = id;
        this.name = name;
    }

}
package com.entity;

import java.sql.Date;

public class Pet {
    private int id;
    private int master_id;
    private String name;
    private int type_id;
    private int health;
    private String love;
    private Date adopt_time;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public int getMaster_id() {
        return master_id;
    }
    public void setMaster_id(int master_id) {
        this.master_id = master_id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getType_id() {
        return type_id;
    }
    public void setType_id(int type_id) {
        this.type_id = type_id;
    }
    public int getHealth() {
        return health;
    }
    public void setHealth(int health) {
        this.health = health;
    }
    public String getLove() {
        return love;
    }
    public void setLove(String love) {
        this.love = love;
    }
    public Date getAdopt_time() {
        return adopt_time;
    }
    public void setAdopt_time(Date adopt_time) {
        this.adopt_time = adopt_time;
    }
    public Pet() {
        super();
    }
    public Pet( int master_id, String name, int type_id,
             Date adopt_time) {
        super();
        this.master_id = master_id;
        this.name = name;
        this.type_id = type_id;
        this.adopt_time = adopt_time;
    }

}

com.entity

package com.server;

import java.util.List;

import com.dao.MasterDao;
import com.dao.PetDao;
import com.dao.Pet_typeDao;
import com.daoImpl.MasterDaoImpl;
import com.daoImpl.PetDaoImpl;
import com.daoImpl.Pet_typeDaoImpl;
import com.entity.Master;
import com.entity.Pet;
import com.entity.Pet_type;

public class MasterManager {
    private Master master;
    private Pet_type tp;
    private Pet pet;
    private MasterDao masterdao;
    private Pet_typeDao pet_typedao;
    private PetDao petdao;
    public MasterManager(){
        masterdao=new MasterDaoImpl();
        pet_typedao=new Pet_typeDaoImpl();
        petdao=new PetDaoImpl();
    }
    public boolean login(String name,String pwd){
        Master m=masterdao.findByNameAndPwd(name, pwd);
        this.master=m;
        return m!=null;
    }

    public boolean checkPet(List<String> pets,String petname){
        for(String s:pets){
            if(s.equals(petname)){
                tp=pet_typedao.findByName(s);
                return true;
            }
        }
        System.out.println("宠物类型有误，领养失败！");
        return false;
    }
    public List<String> showPet(){
        List<String> pets=pet_typedao.findAllName();
        for(String petname:pets){
            System.out.print(petname+" | ");
        }
        System.out.println();
        return pets;
    }
    public void adoptPet(Pet pt){
        pet=pt;
        pet.setMaster_id(master.getId());
        pet.setType_id(tp.getId());
        petdao.save(pet);
    }

}

com.server

package com.test;

import java.sql.Date;
import java.util.List;
import java.util.Scanner;

import com.entity.Pet;
import com.server.MasterManager;
import com.util.JDBCTool;

public class Test {
    public static void main(String[] args) {
        JDBCTool.getConnecttion();
        Scanner sc=new Scanner(System.in);
        MasterManager mm=new MasterManager();
        System.out.println("----欢迎光临宠物乐园-----");
        System.out.print("请输入用户名：");
        String user=sc.nextLine();
        System.out.print("请输入密码：");
        String pwd=sc.nextLine();
        boolean isLogin=mm.login(user, pwd);
        if(!isLogin){
            System.out.println("登陆失败，用户名或密码错误！");
            System.exit(0);
        }
        System.out.println("登陆成功！");
        System.out.println("请选择宠物类型：");
        List<String> namelist=mm.showPet();
        String petname=sc.nextLine();
        boolean flag=mm.checkPet(namelist, petname);
        if(!flag){
            System.out.println("宠物类型有误，领养失败！");
            System.exit(0);
        }
        System.out.print("请输入宠物昵称：");
        petname=sc.nextLine();
        Pet pt=new Pet();
        pt.setName(petname);
        pt.setAdopt_time(new Date(new java.util.Date().getTime()));
        mm.adoptPet(pt);
        System.out.println("领养成功！");

    }

}

com.test

package com.util;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Properties;

public class JDBCTool {
    private JDBCTool(){}
    private static Connection conn;
    private static PreparedStatement pstml;
    private static ResultSet rs;
    public static void getConnecttion(){
        Properties prop=new Properties();
        try {
            prop.load(new FileInputStream("src/jdbc.properties"));
        } catch (FileNotFoundException e1) {
            e1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        String driver=prop.getProperty("driver");
        String url=prop.getProperty("url");
        String user=prop.getProperty("user");
        String pwd=prop.getProperty("pwd");
        try {
            Class.forName(driver);
            conn=DriverManager.getConnection(url,user,pwd);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static int DML(String sql,Object ... params){//使用可变参数
        int num=0;
        try {
            pstml=conn.prepareStatement(sql);
            if(params!=null){
                for(int i=0;i<params.length;i++){
                    pstml.setObject((i+1), params[i]);
                }
            }
            conn.setAutoCommit(false);//关闭自动提交，开启事务
            try{
            num=pstml.executeUpdate();
                conn.commit();
            }catch(Exception e){
                conn.rollback();
                e.printStackTrace();
            }

        } catch (SQLException e) {
            e.printStackTrace();
        }
        return num;
    }

    public static ResultSet Query(String sql,Object ... params){

        try {
            pstml=conn.prepareStatement(sql);
            if (params != null) {
                for (int i = 0; i < params.length; i++) {
                    pstml.setObject((i + 1), params[i]);
                }
            }
            return rs = pstml.executeQuery();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return rs;

    }

    public static void closeAll(){
        if(rs!=null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(pstml!=null){
            try {
                pstml.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    public static boolean isConnect(){
        return conn==null?false:true;
    }
}

com.util

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/db_gz?CharacterEncoding=UTF-8
user=guodaxia
pwd=961012gz

jdbc.properties

CREATE DATABASE db_gz DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
USE db_gz
CREATE TABLE master
(
 id int AUTO_INCREMENT PRIMARY KEY,
 loginname varchar(50) UNIQUE NOT NULL,
 password varchar(50)
);

CREATE TABLE pet_type
(
 id int AUTO_INCREMENT PRIMARY KEY,
 name varchar(50) UNIQUE NOT NULL
);

CREATE TABLE pet
(
 id int AUTO_INCREMENT PRIMARY KEY,
 master_id int NOT NULL,
 name varchar(50) NOT NULL,
 type_id int NOT NULL,
 health int NOT NULL DEFAULT 80,
 love varchar(100),
 adopt_time date,
 FOREIGN KEY (master_id) REFERENCES master (id),
 FOREIGN KEY (type_id) REFERENCES pet_type(id)
);
INSERT INTO master (loginname,password) VALUES ('郭大侠','');
INSERT INTO pet_type (name) VALUES ('狗狗'),('企鹅'),('猫咪');

select * from master;

select * from master where loginname='郭大侠' and password='';
SELECT * FROM master WHERE loginname='郭大侠' AND password='';

select * from pet;

database sql