Spring实战之Bean定义中的SpEL表达式语言支持操作示例

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package org.crazyit.app.service;
public interface Axe
{
   String chop();
}

package org.crazyit.app.service;
import java.util.*;
public interface Person
{
   public void useAxe();
   public List getBooks();
   public String getName();
}

package org.crazyit.app.service.impl;
import java.util.*;
import org.crazyit.app.service.*;
public class Author implements Person
{
  private Integer id;
  private String name;
  private List books;
  private Axe axe;
  // id的setter和getter方法
  public void setId(Integer id)
  {
    this.id = id;
  }
  public Integer getId()
  {
    return this.id;
  }
   // name的setter和getter方法
  public void setName(String name)
  {
    this.name = name;
  }
  public String getName()
  {
    return this.name;
  }
   // books的setter和getter方法
  public void setBooks(List books)
  {
    this.books = books;
  }
  public List getBooks()
  {
    return this.books;
  }
   // axe的setter方法
  public void setAxe(Axe axe)
  {
    this.axe = axe;
  }
   public void useAxe()
  {
    System.out.println("我是"
      + name + "，正在砍柴\n" + axe.chop());
  }
}

package org.crazyit.app.service.impl;
import org.crazyit.app.service.*;
public class SteelAxe implements Axe
{
   public String chop()
   {
      return "钢斧砍柴很快！";
   }
}

package lee;
import org.springframework.context.*;
import org.springframework.context.support.*;
import java.util.*;
import org.crazyit.app.service.*;
public class SpELTest
{
  public static void main(String[] args)
  {
    ApplicationContext ctx = new
      ClassPathXmlApplicationContext("beans.xml");
    Person author = ctx.getBean("author" , Person.class);
    System.out.println(author.getBooks());
    author.useAxe();
   }
}