Spring IOC基础使用

先下载、导入核心jar包

编写Book类和CollectionUse类

 package MyPackageOne;

 public class Book {
     private String title;
     private double price;

     public Book() {
         this("", 0.0);
     }

     public Book(String title, double price) {
         this.title = title;
         this.price = price;
     }

     public String getTitle() {
         return title;
     }

     public void setTitle(String title) {
         this.title = title;
     }

     public double getPrice() {
         return price;
     }

     public void setPrice(double price) {
         this.price = price;
     }

     @Override
     public String toString() {
         return "title: " + title + ", price: " + price;
     }
 }

 package MyPackageOne;

 import java.lang.reflect.Array;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;

 public class CollectionUse {
     private List<String> stringList;
     private String[] strings;
     private Set<String> stringSet;
     private Map<String, String> stringStringMap;

     public List<String> getStringList() {
         return stringList;
     }

     public void setStringList(List<String> stringList) {
         this.stringList = stringList;
     }

     public String[] getStrings() {
         return strings;
     }

     public void setStrings(String[] strings) {
         this.strings = strings;
     }

     public Set<String> getStringSet() {
         return stringSet;
     }

     public void setStringSet(Set<String> stringSet) {
         this.stringSet = stringSet;
     }

     public Map<String, String> getStringStringMap() {
         return stringStringMap;
     }

     public void setStringStringMap(Map<String, String> stringStringMap) {
         this.stringStringMap = stringStringMap;
     }

     @Override
     public String toString() {
         return "CollectionUse{" +
                 "stringList=" + stringList +
                 ", strings=" + Arrays.toString(strings) +
                 ", stringSet=" + stringSet +
                 ", stringStringMap=" + stringStringMap +
                 '}';
     }
 }

在applicationContext.xml中写好类实例

 <?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="bookOne" class="MyPackageOne.Book">
         <property name="title" value="java"></property>
         <property name="price" value="15.2"></property>
     </bean>
     <bean id="collectionUseOne" class="MyPackageOne.CollectionUse">
         <property name="stringList">
             <list>
                 <value>帅气的我list</value>
                 <value>勇气的我list</value>
                 <value>厉害的我list</value>
                 <value>无敌的我list</value>
                 <value>666的我list</value>
             </list>
         </property>
         <property name="strings">
             <array>
                 <value>帅气的我string</value>
                 <value>勇气的我string</value>
                 <value>厉害的我string</value>
                 <value>无敌的我string</value>
                 <value>666的我string</value>
             </array>
         </property>
         <property name="stringSet">
             <set>
                 <value>帅气的我set</value>
                 <value>勇气的我set</value>
                 <value>厉害的我set</value>
                 <value>无敌的我set</value>
                 <value>666的我set</value>
             </set>
         </property>
         <property name="stringStringMap">
             <map>
                 <entry>
                     <key><value>name</value></key>
                     <value>无敌</value>
                 </entry>
                 <entry>
                     <key><value>你好啊</value></key>
                     <value>enen</value>
                 </entry>
             </map>
         </property>
     </bean>
 </beans>

主函数中观察获取结果：

 ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
 Book bookOne = (Book) ac.getBean("bookOne");
 System.out.println(bookOne);
 CollectionUse cu = (CollectionUse) ac.getBean("collectionUseOne");
 System.out.println(cu);