Spring实战——Bean定义中的SpEL表达式语言支持

一 配置

二 资源文件

a=\u300a\u8f7b\u91cf\u7ea7Java  EE\u4f01\u4e1a\u5e94\u7528\u5b9e\u6218\u300b
b=\u300a\u75af\u72c2Java\u8bb2\u4e49\u300b

三 接口

Axe

package org.crazyit.app.service;

public interface Axe
{
     String chop();
}

Person

package org.crazyit.app.service;
import java.util.*;

public interface Person
{
     public void useAxe();
     public List getBooks();
     public String getName();
}

四 Bean

Author

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());
    }
}

SteelAxe 

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！";
     }
}

五 测试类

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();


    }
}

六 测试结果

[《轻量级Java EE企业应用实战》, 《疯狂Java讲义》]
我是0.06178107142599454，正在砍柴
钢斧砍柴很快！