Spring - 属性注入 5 种方式（XML）

packagecom.imooc.ioc.demo4;
publicclassUser {
privateStringname;
privateIntegerage;
publicUser(Stringname,Integerage){
this.name=name;
this.age=age;
    }
@OverridepublicStringtoString() {
return"User{"+"name='"+name+'\''+", age="+age+'}';
    }
}

<!--Bean的构造方法的属性注入--><beanid="user"class="com.imooc.ioc.demo4.User"><constructor-argname="name"value="张三"/><constructor-argname="age"value="23"/></bean>

packagecom.imooc.ioc.demo4;
importorg.junit.Test;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.support.ClassPathXmlApplicationContext;
publicclassSpringDemo4 {
@Testpublicvoiddemo1(){
ApplicationContextapplicationContext=newClassPathXmlApplicationContext("applicationContext.xml");
Useruser= (User)applicationContext.getBean("user");
System.out.println(user);
    }
}

运行结果：User{name='张三', age=23}

packagecom.imooc.ioc.demo4;
publicclassPerson {
privateStringname;
privateIntegerage;
privateCatcat;
publicStringgetName() {
returnname;
    }
publicvoidsetName(Stringname) {
this.name=name;
    }
publicIntegergetAge() {
returnage;
    }
publicvoidsetAge(Integerage) {
this.age=age;
    }
publicCatgetCat() {
returncat;
    }
publicvoidsetCat(Catcat) {
this.cat=cat;
    }
@OverridepublicStringtoString() {
return"Person{"+"name='"+name+'\''+", age="+age+", cat="+cat+'}';
    }
}

packagecom.imooc.ioc.demo4;
publicclassCat {
privateStringname;
publicStringgetName() {
returnname;
    }
publicvoidsetName(Stringname) {
this.name=name;
    }
@OverridepublicStringtoString() {
return"Cat{"+"name='"+name+'\''+'}';
    }
}

<!--Bean的set方法的属性注入--><beanid="person"class="com.imooc.ioc.demo4.Person"><propertyname="name"value="李四"/><propertyname="age"value="32"/><propertyname="cat"ref="cat"/></bean><beanid="cat"class="com.imooc.ioc.demo4.Cat"><propertyname="name"value="ketty"/></bean>

packagecom.imooc.ioc.demo4;
importorg.junit.Test;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.support.ClassPathXmlApplicationContext;
publicclassSpringDemo4 {
@Testpublicvoiddemo2(){
ApplicationContextapplicationContext=newClassPathXmlApplicationContext("applicationContext.xml");
Personperson= (Person)applicationContext.getBean("person");
System.out.println(person);
    }
}

运行结果：Person{name='李四', age=32, cat=Cat{name='ketty'}}

<!--Bean的p名称空间的属性注入--><beanid="person"class="com.imooc.ioc.demo4.Person"p:name="大黄"p:age="34"p:cat-ref="cat"/><beanid="cat"class="com.imooc.ioc.demo4.Cat"p:name="小黄"/>

运行结果：Person{name='大黄', age=34, cat=Cat{name='小黄'}}

packagecom.imooc.ioc.demo4;
publicclassCategory {
privateStringname;
publicStringgetName() {
returnname;
    }
publicvoidsetName(Stringname) {
this.name=name;
    }
@OverridepublicStringtoString() {
return"Category{"+"name='"+name+'\''+'}';
    }
}

packagecom.imooc.ioc.demo4;
publicclassProduct {
privateStringname;
privateDoubleprice;
privateCategorycategory;
publicStringgetName() {
returnname;
    }
publicvoidsetName(Stringname) {
this.name=name;
    }
publicDoublegetPrice() {
returnprice;
    }
publicvoidsetPrice(Doubleprice) {
this.price=price;
    }
publicCategorygetCategory() {
returncategory;
    }
publicvoidsetCategory(Categorycategory) {
this.category=category;
    }
@OverridepublicStringtoString() {
return"Product{"+"name='"+name+'\''+", price="+price+", category="+category+'}';
    }
}

packagecom.imooc.ioc.demo4;
publicclassProductInfo {
publicDoublecalculatePrice(){
returnMath.random() *199;
    }
}

<!--Bean的SpEL的属性注入--><beanid="category"class="com.imooc.ioc.demo4.Category"><propertyname="name"value="#{'服装'}"/></bean><beanid="productInfo"class="com.imooc.ioc.demo4.ProductInfo"/><beanid="product"class="com.imooc.ioc.demo4.Product"><propertyname="name"value="#{'男装'}"/><propertyname="price"value="#{productInfo.calculatePrice()}"/><propertyname="category"value="#{category}"/></bean>

packagecom.imooc.ioc.demo4;
importorg.junit.Test;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.support.ClassPathXmlApplicationContext;
publicclassSpringDemo4 {
@Testpublicvoiddemo3(){
ApplicationContextapplicationContext=newClassPathXmlApplicationContext("applicationContext.xml");
Productproduct= (Product)applicationContext.getBean("product");
System.out.println(product);
    }
}

运行结果：Product{name='男装', price=155.43113186211818, category=Category{name='服装'}}

packagecom.imooc.ioc.demo5;
importjava.util.*;
publicclassCollectionBean {
privateString[] arrs; // 数组类型privateList<String>list; // List集合类型privateSet<String>set; // Set集合类型privateMap<String,Integer>map; // Map集合类型privatePropertiesproperties; // 属性类型publicString[] getArrs() {
returnarrs;
    }
publicvoidsetArrs(String[] arrs) {
this.arrs=arrs;
    }
publicList<String>getList() {
returnlist;
    }
publicvoidsetList(List<String>list) {
this.list=list;
    }
publicSet<String>getSet() {
returnset;
    }
publicvoidsetSet(Set<String>set) {
this.set=set;
    }
publicMap<String, Integer>getMap() {
returnmap;
    }
publicvoidsetMap(Map<String, Integer>map) {
this.map=map;
    }
publicPropertiesgetProperties() {
returnproperties;
    }
publicvoidsetProperties(Propertiesproperties) {
this.properties=properties;
    }
@OverridepublicStringtoString() {
return"CollectionBean{"+"arrs="+Arrays.toString(arrs) +", list="+list+", set="+set+", map="+map+", properties="+properties+'}';
    }
}

<!--集合类型的属性注入--><beanid="collectionBean"class="com.imooc.ioc.demo5.CollectionBean"><!--数组类型--><propertyname="arrs"><list><value>aaa</value><value>bbb</value><value>ccc</value></list></property><!--List集合的属性注入--><propertyname="list"><list><value>111</value><value>222</value><value>333</value></list></property><!--Set集合的属性注入--><propertyname="set"><set><value>ddd</value><value>eee</value><value>fff</value></set></property><!--Map集合的属性注入--><propertyname="map"><map><entrykey="aaa"value="111"/><entrykey="bbb"value="222"/><entrykey="ccc"value="333"/></map></property><!--Properties的属性注入--><propertyname="properties"><props><propkey="username">root</prop><propkey="password">1234</prop></props></property></bean>

packagecom.imooc.ioc.demo5;
importorg.junit.Test;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.support.ClassPathXmlApplicationContext;
publicclassSpringDemo5 {
@Testpublicvoiddemo1(){
ApplicationContextapplicationContext=newClassPathXmlApplicationContext("applicationContext.xml");
CollectionBeancollectionBean= (CollectionBean)applicationContext.getBean("collectionBean");
System.out.println(collectionBean);
    }
}

运行结果：CollectionBean{arrs=[aaa, bbb, ccc], list=[111, 222, 333], set=[ddd, eee, fff], map={aaa=111, bbb=222, ccc=333}, properties={password=1234, username=root}}