File : IOutputGenerator.java – 输出生成器接口

package com.yiibai.output;

public interface IOutputGenerator
{
 public void generateOutput();
}
File : CsvOutputGenerator.java – 一个CSV输出生成器用来实现IOutputGenerator接口。

package com.yiibai.output.impl;

import com.yiibai.output.IOutputGenerator;

public class CsvOutputGenerator implements IOutputGenerator
{
 public void generateOutput(){
 System.out.println("Csv Output Generator");
 }
}
File : JsonOutputGenerator.java – 一个JSON输出生成器用来实现IOutputGenerator接口。

package com.yiibai.output.impl;

import com.yiibai.output.IOutputGenerator;

public class JsonOutputGenerator implements IOutputGenerator
{
 public void generateOutput(){
 System.out.println("Json Output Generator");
 }
}

package com.yiibai.common;

import com.yiibai.output.IOutputGenerator;
import com.yiibai.output.impl.CsvOutputGenerator;
/* http://www.manongjc.com/article/1602.html */
public class App 
{
  public static void main( String[] args )
  {
   IOutputGenerator output = new CsvOutputGenerator();
   output.generateOutput();
  }
}

package com.yiibai.output;

import com.yiibai.output.IOutputGenerator;
import com.yiibai.output.impl.CsvOutputGenerator;

public class OutputHelper
{
 IOutputGenerator outputGenerator;
 
 public OutputHelper(){
 outputGenerator = new CsvOutputGenerator();
 }
 
 public void generateOutput(){
 outputGenerator.generateOutput();
 }
 
}

package com.yiibai.common;

import com.yiibai.output.OutputHelper;

public class App 
{
  public static void main( String[] args )
  {
   OutputHelper output = new OutputHelper();
   output.generateOutput(); 
  }
}

package com.yiibai.output;

import com.yiibai.output.IOutputGenerator;

public class OutputHelper
{
 IOutputGenerator outputGenerator;
 
 public void generateOutput(){
 outputGenerator.generateOutput();
 }
 
 public void setOutputGenerator(IOutputGenerator outputGenerator){
 this.outputGenerator = outputGenerator;
 }
}

<!-- Spring-Common.xml -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

 <bean id="OutputHelper" class="com.yiibai.output.OutputHelper">
 <property name="outputGenerator" ref="CsvOutputGenerator" />
 </bean>
 
 <bean id="CsvOutputGenerator" class="com.yiibai.output.impl.CsvOutputGenerator" />
 <bean id="JsonOutputGenerator" class="com.yiibai.output.impl.JsonOutputGenerator" />
 
</beans>

package com.yiibai.common;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.yiibai.output.OutputHelper;

public class App 
{
  public static void main( String[] args )
  {
   ApplicationContext context = 
    new ClassPathXmlApplicationContext(new String[] {"Spring-Common.xml"});

   OutputHelper output = (OutputHelper)context.getBean("OutputHelper");
   output.generateOutput();
    
  }
}