搭建spring环境,打印机装配 接口:Print(打印机) Ink(墨水) Paper(纸张) 打印机实现类:EpsonPrint HPPrint 墨水实现类:BlackInk ColorInk 纸张实现类:A3Paper A4Paper使用spring完成打印机的装配和内容的注入(xml,annotation)
时间: 2023-04-03 21:00:26 浏览: 204
利用spring实现打印机
好的,这是一个关于 Spring 环境搭建的问题。针对这个问题,我可以给出以下回答:
首先,我们需要在 Spring 的配置文件中定义打印机、墨水和纸张的 bean。可以使用 XML 或注解的方式进行配置。
XML 配置方式:
```
<bean id="epsonPrint" class="com.example.EpsonPrint" />
<bean id="hpPrint" class="com.example.HPPrint" />
<bean id="blackInk" class="com.example.BlackInk" />
<bean id="colorInk" class="com.example.ColorInk" />
<bean id="a3Paper" class="com.example.A3Paper" />
<bean id="a4Paper" class="com.example.A4Paper" />
```
注解配置方式:
```
@Component
public class EpsonPrint implements Print {
// ...
}
@Component
public class HPPrint implements Print {
// ...
}
@Component
public class BlackInk implements Ink {
// ...
}
@Component
public class ColorInk implements Ink {
// ...
}
@Component
public class A3Paper implements Paper {
// ...
}
@Component
public class A4Paper implements Paper {
// ...
}
```
接下来,我们需要在打印机类中注入墨水和纸张的 bean。可以使用构造函数注入或 setter 方法注入的方式。
构造函数注入方式:
```
public class EpsonPrint implements Print {
private Ink ink;
private Paper paper;
public EpsonPrint(Ink ink, Paper paper) {
this.ink = ink;
this.paper = paper;
}
// ...
}
public class HPPrint implements Print {
private Ink ink;
private Paper paper;
public HPPrint(Ink ink, Paper paper) {
this.ink = ink;
this.paper = paper;
}
// ...
}
```
Setter 方法注入方式:
```
public class EpsonPrint implements Print {
private Ink ink;
private Paper paper;
public void setInk(Ink ink) {
this.ink = ink;
}
public void setPaper(Paper paper) {
this.paper = paper;
}
// ...
}
public class HPPrint implements Print {
private Ink ink;
private Paper paper;
public void setInk(Ink ink) {
this.ink = ink;
}
public void setPaper(Paper paper) {
this.paper = paper;
}
// ...
}
```
最后,我们可以在代码中使用打印机的 bean 进行打印操作。
```
@Autowired
private Print epsonPrint;
public void print() {
epsonPrint.print("Hello, world!");
}
```
这样,我们就完成了 Spring 环境下打印机的装配和内容的注入。
阅读全文