Spring之集合(数组、Map、List、Set)注入方法

╰半橙微兮° 2023-01-07 12:27 160阅读 0赞

### **Spring之集合(数组、Map、List、Set)注入方法** ###

**前言**

**Spring之集合(数组、Map、List、Set)注入方法的步骤**

1.  创建类，定义数组，list，map，set类型属性，并且生成对应的set、get方法。
2.  在spring配置文件中进行配置。

--------------------

**demo如下：**

**地址类：**

public class Address
    {
    
        private String address;
    
        public void setAddress(String address) {
            this.address = address;
        }
    
        public String getAddress() {
            return address;
        }
    
        @Override
        public String toString() {
            return "Address{" +
                    "address='" + address + '\'' +
                    '}';
        }
    }

**学生类：**

public class Student {
        private String name; //名字
        private  Address address; //地址
    
    
    
        //集合
        private String[] books;//书
        private List<String>hobbys; //爱好
        private Map<String,String>card;//学生卡
        private Set<String>gams;//游戏
    
        private String wife;//空指针
        private Properties info; //信息
    
        @Override
        public String toString() {
            return "Student{" +
                    "name='" + name + '\'' +
                    ", address=" + address.toString() +
                    ", books=" + Arrays.toString(books) +
                    ", hobbys=" + hobbys +
                    ", card=" + card +
                    ", gams=" + gams +
                    ", wife='" + wife + '\'' +
                    ", info=" + info +
                    '}';
        }
    
    
        public String[] getBooks() {
            return books;
        }
    
        public void setBooks(String[] books) {
            this.books = books;
        }
        
        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 List<String> getHobbys() {
            return hobbys;
        }
    
        public void setHobbys(List<String> hobbys) {
            this.hobbys = hobbys;
        }
    
        public Map<String, String> getCard() {
            return card;
        }
    
        public void setCard(Map<String, String> card) {
            this.card = card;
        }
    
        public Set<String> getGams() {
            return gams;
        }
    
        public void setGams(Set<String> gams) {
            this.gams = gams;
        }
    
        public String getWife() {
            return wife;
        }
    
        public void setWife(String wife) {
            this.wife = wife;
        }
    
        public Properties getInfo() {
            return info;
        }
    
        public void setInfo(Properties info) {
            this.info = info;
        }
    }

**beans.xml（划重点集合注入看这里）**

<?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="address" class="cn.pojo.Address"></bean>
    
    
        <bean id="student" class="cn.pojo.Student">
            
            <property name="name" value="詹大先生"></property>
    
            
            <property name="address" ref="address"></property>
    
    
    
            
            <property name="books">
                <array>
                    <value>红楼梦</value>
                    <value>三国演义</value>
                    <value>许三多卖血记</value>
                </array>
            </property>
    
    
            
            <property name="hobbys">
                <list>
                    <value>篮球</value>
                    <value>游戏</value>
                    <value>足球</value>
    
                </list>
            </property>
    
    
            
            <property name="card">
                <map>
                    <entry key="身份证" value="11111111111"></entry>
                    <entry key="学生证" value="2027019262"></entry>
    
                </map>
            </property>
    
    
            
            <property name="gams">
                <set>
                    <value>英雄联盟</value>
                    <value>王者荣耀</value>
                    <value>NBA2KOL2</value>
                </set>
            </property>
    
    
            
            <property name="wife">
                <null></null>
            </property>
    
    
            
            <property name="info">
                <props>
                    <prop key="username">小明</prop>
                    <prop key="password">123456</prop>
    
                </props>
            </property>
    
        </bean>
    
    </beans>

**测试类：**

public class MyTest {
        public static void main(String[] args) {
    
            ApplicationContext context =new ClassPathXmlApplicationContext("beans.xml");
    
            Student student = (Student) context.getBean("student");
            System.out.println(student.toString());
    
    
        }
    }

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