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set方式
User类
该类包含set方法
public class User {
private String name;
private String age;
private Car car;
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setAge(String age) {
this.age = age;
}
public String getAge() {
return age;
}
public void setCar(Car car) {
this.car = car;
}
public Car getCar() {
return car;
}
@Override
public String toString() {
return "User{" +
"name='" + name + '\'' +
", age='" + age + '\'' +
", car=" + car +
'}';
}
}
Car类
该类也包含set方法
public class Car {
private String name;
private String color;
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setColor(String color) {
this.color = color;
}
public String getColor() {
return color;
}
@Override
public String toString() {
return "Car{" +
"name='" + name + '\'' +
", color='" + color + '\'' +
'}';
}
}
applicationContext.xml
注意中的ref。
<bean id="user" class="com.me.injection.User">
<property name="name" value="张三"></property>
<property name="age" value="22"></property>
<property name="car" ref="car"></property>
</bean>
<bean id="car" class="com.me.injection.Car">
<property name="name" value="哔哔"></property>
<property name="color" value="red"></property>
</bean>
构造函数方式
User类
public class User {
private String name;
private String age;
private Car car;
public User(){
}
public User(String name,String age){
super();
this.name=name;
this.age=age;
}
public User(String name,String age,Car car){
super();
this.name=name;
this.age=age;
this.car=car;
}
public User(String name) {
}
@Override
public String toString() {
return "User{" +
"name='" + name + '\'' +
", age='" + age + '\'' +
", car=" + car +
'}';
}
}
Car类
public class Car {
private String name;
private String color;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
@Override
public String toString() {
return "Car{" +
"name='" + name + '\'' +
", color='" + color + '\'' +
'}';
}
}
applicationContext.xml
<bean id="user" class="com.me.injection.User">
<constructor-arg name="name" value="李四"></constructor-arg>
<constructor-arg name="age" value="22"></constructor-arg>
<constructor-arg name="car" ref="car"></constructor-arg>
</bean>
<bean id="car" class="com.me.injection.Car">
<property name="name" value="哔哔"></property>
<property name="color" value="red"></property>
</bean>