Spring学习-构造器注入

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在java里面构造带参数的构造器

package service.impl;import service.PersonService;import dao.PersonDAO;public class PersonServiceImpl1 implements PersonService{private PersonDAO personDao;private String name;private Integer id;public PersonServiceImpl1(PersonDAO personDao, String name, Integer id) {super();this.personDao = personDao;this.name = name;this.id = id;}/*public PersonServiceImpl1() {super();}*/@Overridepublic void save() {System.out.println(name+"-------------"+id);personDao.add();}}

<!-- 使用构造器注入 --><bean id="ss1" class="service.impl.PersonServiceImpl1">     <constructor-arg index="0" type="dao.PersonDAO" ref="personDao"/>     <constructor-arg index="1"  value="易家享"/>     <constructor-arg index="2"  value="99"/></bean><bean id="personDao" class="dao.impl.PersonDaoImpl"></bean>

type是构造器里面元素的类型 <constructor-arg index="" type="">

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