Spring-Bean依赖注入(引用数据类型和集合数据类型）

为什么使用spring依赖注入详见–》依赖注入分析
1.创建实体类User类

package com.hao.domain;

public class User {
    private String name;
    private String addr;

    public String getName() {
        return name;
    }

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

    public String getAddr() {
        return addr;
    }

    public void setAddr(String addr) {
        this.addr = addr;
    }

    @Override
    public String toString() {
        return "User{" +
                "name='" + name + '\'' +
                ", addr='" + addr + '\'' +
                '}';
    }
}

2.UserDao接口及其实现类UserDaoImpl（接口代码省略）

public class UserDaoImpl implements UserDao {

    private List<String> strList;  //集合
    private Map<String, User> userMap;//集和，集合中也包括User引用
    private Properties properties;
	//使用set方法注入
    public void setStrList(List<String> strList) {
        this.strList = strList;
    }

    public void setUserMap(Map<String, User> userMap) {
        this.userMap = userMap;
    }

    public void setProperties(Properties properties) {
        this.properties = properties;
    }
    
    @Override
    public void save1() {
        System.out.println(strList);
        System.out.println(userMap);
        System.out.println(properties);
    }
}

3.UserService接口以及UserServiceImpl实现类（省略接口代码）

public class UserServiceImpl implements UserService {

    private UserDao userDao;

    public UserServiceImpl() {
    }

    public UserServiceImpl(UserDao userDao) {
        this.userDao = userDao;
    }

    @Override
    public void sava() {
        userDao.save1();
    }
}

3.applicationContext.xml配置文件

<?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="userDao" class="com.hao.dao.impl.UserDaoImpl">
        <property name="strList">
            <list>
                <value>aaa</value>
                <value>bbb</value>
                <value>ccc</value>
            </list>
        </property>
        <property name="userMap">
            <map>
                <entry key="user1" value-ref="user1"></entry>
                <entry key="user2" value-ref="user2"></entry>
            </map>
        </property>
        <property name="properties">
            <props>
                <prop key="p1">ppp1</prop>
                <prop key="p2">ppp2</prop>
                <prop key="p3">ppp3</prop>
            </props>
        </property>
    </bean>
    //因为map集合里面包括User引用，而User类中还有其他属性，所以需要进行注入，然后通过id被上面配置的value-ref引入
    <bean id="user1" class="com.hao.domain.User">
        <property name="name" value="tom"/>
        <property name="addr" value="beijing"/>
    </bean>
    <bean id="user2" class="com.hao.domain.User">
        <property name="name" value="jin"/>
        <property name="addr" value="tianjing"/>
    </bean>


    <bean id="userService" class="com.hao.service.impl.UserServiceImpl">
        <constructor-arg name="userDao" ref="userDao"></constructor-arg>
    </bean>
</beans>

5.测试类

public class UserController {
    public static void main(String[] args) {
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
        UserService service = (UserService) context.getBean("userService");
        service.sava();

    }
}

结果当然显而易见了