Spring4.0支持Groovy配置

比眉伴天荒 2022-03-11 14:14 91阅读 0赞

介绍

前一段时间观注了一下Spring4.0的一些特性，其中就有对Groovy配置的支持。由于暂时还没有非常深入的研究，所以举个小例子来说明一下如何支持Groovy配置。

package shuai.study.spring.bean;
    
    public class Gasoline {
    	private int capacity = 0;
    
    	public Gasoline(int capacity) {
    		this.capacity = capacity;
    	}
    
    	public int getCapacity() {
    		return this.capacity;
    	}
    }

package shuai.study.spring.bean;
    
    public class Car {
    	private String name = null;
    	private Gasoline gasoline = null;
    
    	public Car(Gasoline gasoline) {
    		this.gasoline = gasoline;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	public void run() {
    		int capacity = gasoline.getCapacity();
    
    		if (gasoline.getCapacity() > 100) {
    			System.out.println("Gasoline capacity is " + capacity + ", " + this.name + " could start to run.");
    		} else {
    			System.out.println("Gasoline capacity is " + capacity + ", " + this.name + " is not enough to run.");
    		}
    	}
    }

car-config.groovy configuration file:

import shuai.study.spring.bean.Car
    import shuai.study.spring.bean.Gasoline
    
    beans {
    	/*
    		In class Car, we know that we defined variable gasoline as parameter of Car's constructor.
    		Here we point out this variable's class(i.e. Gasoline), meanwhile set parameter's value of
    		(Gasoline's) constructor
    	*/	
        gasoline(Gasoline, 80)
    
    	/*
    		Define bean(i.e. car), and point out this bean's class(i.e. Car), meanwhile inject variable 
    		gasoline to it. naturally we inject its variable(i.e. name) as well.  
    	*/
        car(Car, gasoline) {
            name = "Benz"
        }
    }

package shuai.study.spring.bean;
    
    import org.springframework.context.support.GenericGroovyApplicationContext;
    
    public class CarApp {
    
    	@SuppressWarnings("resource")
    	public static void main(String[] args) {
    		GenericGroovyApplicationContext context = new GenericGroovyApplicationContext("classpath:spring/bean/car-config.groovy");
    
    		Car car = (Car) context.getBean("car");
    		car.run();
    	}
    }