1. 創(chuàng)建user Role Product類

public class User {
    private String name;
    private String pwd;

    public String getName() {
        return name;
    }

    public String getPwd() {
        return pwd;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
}

public class Role {
    private String name;
    private String pwd;

    public String getName() {
        return name;
    }

    public String getPwd() {
        return pwd;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
}

public class Product {
    private String name;
    private String pwd;

    public String getName() {
        return name;
    }

    public String getPwd() {
        return pwd;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
}

2. 創(chuàng)建操作抽象類Dao

public interface IRoleDao {
    void add(Role role);
    void remove(Role role);
    Role getUser(String  role);
}

3. 創(chuàng)建Dao的具體實現(xiàn)類

public class MySqlRoleDao implements IRoleDao {
    @Override
    public void add(Role role) {

    }

    @Override
    public void remove(Role role) {

    }

    @Override
    public Role getUser(String name) {
        Role role=new Role();
        role.setName(name);
        return role;
    }
}

public class SqlServiceRoleDao implements IRoleDao {
    @Override
    public void add(Role role) {

    }

    @Override
    public void remove(Role role) {

    }

    @Override
    public Role getUser(String name) {
        Role role=new Role();
        role.setName(name);
        return role;
    }
}

4. 創(chuàng)建一個抽象的工廠方法

public interface IDaoFactory {
    IUserDao createUserDao();
    IRoleDao createRoleDao();
    IProductDao createProductDao();
}

3. 創(chuàng)建工廠方法的具體實現(xiàn)類

public class MySqlDaoFactory implements IDaoFactory {
    @Override
    public IUserDao createUserDao() {
        return new MySqlUserDao();
    }

    @Override
    public IRoleDao createRoleDao() {
        return new MySqlRoleDao();
    }

    @Override
    public IProductDao createProductDao() {
        return new MySqlProductDao();
    }
}

public class SqlServiceDaoFactory implements IDaoFactory {
    @Override
    public IUserDao createUserDao() {
        return new SqlServiceUserDao();
    }

    @Override
    public IRoleDao createRoleDao() {
        return new SqlServiceRoleDao();
    }

    @Override
    public IProductDao createProductDao() {
        return new SqlServiceProductDao();
    }
}

4. 客戶端調(diào)用

IRoleDao roleDao = new SqlServiceDaoFactory().createRoleDao();
Role role = roleDao.getUser("抽象工廠方法");
tv_text.setText(role.getName());