7、生成器模式 一种的材料，不同生产者通过同样的加工步骤生成不同的产品 （指导者通过不同的加工步骤，又可以生成不同的产品）——构建复杂的产品， 产品构建和表现的分离
作用：程序结构松散、扩展更容易、复用性更好，代码更清晰、意图更明确
namespace SJ.DesignMode
{
/// <summary>
/// 设计模式
/// </summary>
class Program
{
static void Main(string[] args)
{
string title = "title";
string body = "body";
string footer = "footer";
//IBuilder ibuilder = new TxtBuilder();
IBuilder ibuilder = new Xmluilder();
Builder builder = new Builder(ibuilder);
string end = builder.Create(title, body, footer);
Console.WriteLine(end);
}
}
public class Builder
{
private IBuilder _builder;
public Builder(IBuilder builder)
{
_builder = builder;
}
public string Create(string title, string body, string footer)
{
//生成器 执行同样的加工步骤
_builder.Head(title);
_builder.Body(body);
_builder.Footer(footer);
return _builder.GetEnd();
}
}
public interface IBuilder
{
void Head(string head);
void Body(string body);
void Footer(string footer);
string GetEnd();
}
public class TxtBuilder : IBuilder
{
private StringBuilder sb = new StringBuilder();
public void Body(string body)
{
sb.Append("body /r/n");
}
public void Footer(string footer)
{
sb.Append("footer /r/n");
}
public string GetEnd()
{
return sb.ToString();
}
public void Head(string head)
{
sb.Append("head /r/n");
}
}
public class Xmluilder : IBuilder
{
private StringBuilder sb = new StringBuilder();
public void Body(string body)
{
sb.Append("<body> body </body> /r/n");
}
public void Footer(string footer)
{
sb.Append("<Footer> footer </Footer> /r/n");
}
public string GetEnd()
{
return sb.ToString();
}
public void Head(string head)
{
sb.Append("<Head> head </Head> /r/n");
}
}
}