Spring的学习_______4.各种参数类型的依耐注入（DI）测试以及P命名空间的注入和C命名空间的注入

Posted 2022-05-19 xbfchder

（本案例为：Idea下的maven项目）

1.实体类的编写：

Student.java

public class Student 


    private String name;
    private Address address;
    private String[] books;
    private List<String> hobbys;
    private Map<String,String> cards;
    private Set<String> games;
    private String girlF;
    private Properties info;

    public Student() 
    

    public Student(String name, Address address, String[] books, List<String> hobbys, Map<String, String> cards, Set<String> games, String girlF, Properties info) 
        this.name = name;
        this.address = address;
        this.books = books;
        this.hobbys = hobbys;
        this.cards = cards;
        this.games = games;
        this.girlF = girlF;
        this.info = info;
    

    public String getName() 
        return name;
    

    public void setName(String name) 
        this.name = name;
    

    public Address getAddress() 
        return address;
    

    public void setAddress(Address address) 
        this.address = address;
    

    public String[] getBooks() 
        return books;
    

    public void setBooks(String[] books) 
        this.books = books;
    

    public List<String> getHobbys() 
        return hobbys;
    

    public void setHobbys(List<String> hobbys) 
        this.hobbys = hobbys;
    

    public Map<String, String> getCards() 
        return cards;
    

    public void setCards(Map<String, String> cards) 
        this.cards = cards;
    

    public Set<String> getGames() 
        return games;
    

    public void setGames(Set<String> games) 
        this.games = games;
    

    public String getGirlF() 
        return girlF;
    

    public void setGirlF(String girlF) 
        this.girlF = girlF;
    

    public Properties getInfo() 
        return info;
    

    public void setInfo(Properties info) 
        this.info = info;
    

    @Override
    public String toString() 
        return "Student" +
                "name=‘" + name + ‘\‘‘ +
                ", address=" + address +
                ", books=" + Arrays.toString(books) +
                ", hobbys=" + hobbys +
                ", cards=" + cards +
                ", games=" + games +
                ", girlF=‘" + girlF + ‘\‘‘ +
                ", info=" + info +
                ‘‘;
    

User.java

public class User 
    private String name;
    private String sex;

    public User() 
    

    public User(String name, String sex) 
        this.name = name;
        this.sex = sex;
    

    public void setName(String name) 
        this.name = name;
    

    public void setSex(String sex) 
        this.sex = sex;
    

    @Override
    public String toString() 
        return "User" +
                "name=‘" + name + ‘\‘‘ +
                ", sex=‘" + sex + ‘\‘‘ +
                ‘‘;
    

2.src / main / resources下的applicationContext.xml文件的编写：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:c="http://www.springframework.org/schema/c"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--Address-->
    <!--
    作用域scope：
    Web相关
        request
        session
        singleton：单例模式
        prototype: 原型
    bean中不填写作用域默认， scope="singleton"，单例
        单例：在内存中只有一个备份
    -->
    <bean id="addr" class="com.kuang.pojo.Address">
        <property name="address" value="西安"/>
    </bean>

    <!--Student-->
    <bean id="student" class="com.kuang.pojo.Student">
        <!--普通字段-->
        <property name="name" value="小明"/>
        <!--引用其他bean使用ref-->
        <property name="address" ref="addr"/>

        <!--数组的注入-->
        <property name="books">
            <array>
                <value>西游记</value>
                <value>水浒传</value>
                <value>红楼梦</value>
                <value>三国演义</value>
            </array>
        </property>

        <!--List注入-->
        <property name="hobbys">
            <list>
                <value>女孩</value>
                <value>代码</value>
                <value>电影</value>
                <value>音乐</value>
            </list>
        </property>

        <!--Map的注入-->
        <property name="card">
            <map>
                <entry key="IdCard" value="666666888888884444"/>
                <entry key="银行卡" value="111122223333444"/>
            </map>
        </property>

        <!--Set注入-->
        <property name="games">
            <set>
                <value>王者荣耀</value>
                <value>贪玩蓝月</value>
                <value>绝地求生</value>
                <value>LOL</value>
            </set>
        </property>

        <!--Null空值注入-->
        <property name="girlF">
            <null/>
        </property>

        <!--Properties注入-->
        <property name="info">
            <props>
                <prop key="学号">201932301</prop>
                <prop key="性别">男</prop>
                <prop key="姓名">小明</prop>
            </props>
        </property>

    </bean>

    <!--p：property属性，命名空间注入-->
    <bean id="user1" class="com.kuang.pojo.User" p:name="狂神" p:age="18"/>

    <!--c：constructor构造器：命名空间注入-->
    <bean id="user2" class="com.kuang.pojo.User" c:name="狂神" c:age="19" />

</beans>

 

3.测试类的编写：

public class Student 

    @Test
    public void test()
        ApplicationContext context =new ClassPathXmlApplicationContext("applicationContext.xml");
        com.xbf.pojo.Student student =(com.xbf.pojo.Student) context.getBean("student");
        System.out.println(student.toString());