spring之构造器注入

 spring中的依赖注入一般以set/get方法为多,但有些情况下需要构造器注入,也就是类构造器有参数的情况下 ,以下为一个demo

一 类文件代码

package chainofresponsibility;

/**
 * 处理不大于Trouble里面存放数字的类
 * @author fengyue
 *
 */
public class LimitProcessor extends Processor {
    private Integer limit;
	private LimitProcessor(String name) {
		super(name);
		// TODO Auto-generated constructor stub
	}
	
	public LimitProcessor(String name,Integer limit) {
		this(name);
		this.limit=limit;
		// TODO Auto-generated constructor stub
	}

	/**
	 * 如果Trouble里面存放数字不大于limit则为可以处理
	 */
	protected boolean isCanProcess(Trouble t) {
		 return t.getNumber().compareTo(limit)!=1;
		
	}

	protected ProcessResult resolve(Trouble t) {
	   
		return new ProcessResult(true,getSuccessMess(t));
	}

}

 

2对应Spring配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
  
  
  <bean id="limitPro" class="chainofresponsibility.LimitProcessor">
   <constructor-arg type="java.lang.String" value="LimitProcessor">
   </constructor-arg>
   <constructor-arg type="java.lang.Integer" value="26">
   </constructor-arg>
  </bean>

</beans>

 

评论

1 楼 管好你家猫 2012-07-19