Spring自动装配byName与byType

落日映苍穹つ 2021-09-24 01:34 238阅读 0赞

**具体的区别在下面xml代码段中已经详细描述！！！**  
Emp.java

package com.zt.ioc.auto;
    
    public class Emp {
        private Integer eid;
        private String ename;
        private Car car;
        private Dept dept;
    
        public Integer getEid() {
            return eid;
        }
    
        public void setEid(Integer eid) {
            this.eid = eid;
        }
    
        public String getEname() {
            return ename;
        }
    
        public void setEname(String ename) {
            this.ename = ename;
        }
    
        public Car getCar() {
            return car;
        }
    
        public void setCar(Car car) {
            this.car = car;
        }
    
        public Dept getDept() {
            return dept;
        }
    
        public void setDept(Dept dept) {
            this.dept = dept;
        }
    
        @Override
        public String toString() {
            return "Emp{" +
                    "eid=" + eid +
                    ", ename='" + ename + '\'' +
                    ", car=" + car +
                    ", dept=" + dept +
                    '}';
        }
    }

Car.java
    package com.zt.ioc.auto;
    
    public class Car {
        private Integer cid;
        private  String cname;
    
        public Integer getCid() {
            return cid;
        }
    
        public void setCid(Integer cid) {
            this.cid = cid;
        }
    
        public String getCname() {
            return cname;
        }
    
        public void setCname(String cname) {
            this.cname = cname;
        }
    
        @Override
        public String toString() {
            return "Car{" +
                    "cid=" + cid +
                    ", cname='" + cname + '\'' +
                    '}';
        }
    }

Dept.java

package com.zt.ioc.auto;
    
    public class Dept {
        private Integer did;
        private String dname;
    
        public Integer getDid() {
            return did;
        }
    
        public void setDid(Integer did) {
            this.did = did;
        }
    
        public String getDname() {
            return dname;
        }
    
        public void setDname(String dname) {
            this.dname = dname;
        }
    
        @Override
        public String toString() {
            return "Dept{" +
                    "did=" + did +
                    ", dname='" + dname + '\'' +
                    '}';
        }
    }

auto.xml

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    
        
    <bean id="emp" class="com.zt.ioc.auto.Emp" autowire="byType">
        <property name="eid" value="1001"></property>
        <property name="ename" value="张三"></property>
    
    
    </bean>
    
    
    
        <bean id="car1" class="com.zt.ioc.auto.Car">
            <property name="cid" value="10001"></property>
            <property name="cname" value="霸道"></property>
        </bean>
    
    
    
    
        <bean id="dept" class="com.zt.ioc.auto.Dept">
            <property name="did" value="10002"></property>
            <property name="dname" value="开发部">
    
            </property>
        </bean>
    </beans>