Java---设计模式app小软件汇总应用（2）

package cn.hncu.app.vo;
import java.io.Serializable;
public class User implements Serializable{//一定要实现这个接口啊！！！
    private String name;
    private int age;
    public User(String name, int age) {
        this.name = name;
        this.age = age;
    }
    public User() {
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + age;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        User other = (User) obj;
        if (age != other.age)
            return false;
        if (name == null) {
            if (other.name != null)
                return false;
        } else if (!name.equals(other.name))
            return false;
        return true;
    }
    @Override
    public String toString() {
        return  name + "," + age;
    }
}

封装查询条件:
UserQueryVO ：

package cn.hncu.app.dao.dao;
import java.util.Collection;
import cn.hncu.app.vo.User;
import cn.hncu.app.vo.UserQueryVO;
public interface UserDAO {
    public Object[] getAllUsers();
    //增删改
    public boolean addUser(User user);
    public boolean delete(User user);//有时参数也可以用：id
    public boolean update(User user);
    //3个查询
    public User getByUserId(String uuid);//查单个
    public Collection<User> getAll();//查全
    public Collection<User> geByCondition(UserQueryVO qvo);
    //只写了接口，并没有具体去应用。。。。这里主要学方法
}

package cn.hncu.app.dao.factory;
import cn.hncu.app.dao.dao.UserDAO;
import cn.hncu.app.dao.impl.UserDaoFileIO;
public class UserDaoFactory {
    public static UserDAO getUserDAO(){
        return new UserDaoFileIO();
    }
}

package cn.hncu.app.dao.impl;
import java.util.Collection;
import cn.hncu.app.dao.dao.UserDAO;
import cn.hncu.app.utils.FileIO;
import cn.hncu.app.vo.User;
import cn.hncu.app.vo.UserQueryVO;
public class UserDaoFileIO implements UserDAO{
    private static final String FILE_NAME = "user.txt";
    @Override
    public Object[] getAllUsers() {
        return FileIO.read(FILE_NAME);
    }
    @Override
    public boolean addUser(User user) {
        return FileIO.write(FILE_NAME, user);
    }
    @Override
    public boolean delete(User user) {
        return false;
    }
    @Override
    public boolean update(User user) {
        return false;
    }
    @Override
    public User getByUserId(String uuid) {
        return null;
    }
    @Override
    public Collection<User> getAll() {
        return null;
    }
    @Override
    public Collection<User> geByCondition(UserQueryVO qvo) {
        return null;
    }
}

package cn.hncu.app.business.ebi;
import cn.hncu.app.vo.User;
public interface UserEbi {
    public boolean addUser(User user);
    public Object[] getAllUser();
}

package cn.hncu.app.business.factory;
import cn.hncu.app.business.ebi.UserEbi;
import cn.hncu.app.business.impl.UserEbo;
public class UserEbiFactory {
    public static UserEbi getUserEbi(){
        return new UserEbo();
    }
}