14.Bean属性的注入方式

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Bean属性的注入方式

Bean的集合属性的注入

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package com.course.vo;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

public class Department {

	private List<String> titleList;
	private List<User> staffList;
	
	private Set<String> titleSet;
	private Set<User> staffSet;
	
	private Map<String, String> databaseMap;
	private Map<Integer, User> staffMap;
	
	private String[] titleArray;
	private User[] staffArray;
	
	private Properties properties;

	public List<String> getTitleList() {
		return titleList;
	}

	public void setTitleList(List<String> titleList) {
		this.titleList = titleList;
	}

	public List<User> getStaffList() {
		return staffList;
	}

	public void setStaffList(List<User> staffList) {
		this.staffList = staffList;
	}

	public Set<String> getTitleSet() {
		return titleSet;
	}

	public void setTitleSet(Set<String> titleSet) {
		this.titleSet = titleSet;
	}

	public Set<User> getStaffSet() {
		return staffSet;
	}

	public void setStaffSet(Set<User> staffSet) {
		this.staffSet = staffSet;
	}

	public Map<String, String> getDatabaseMap() {
		return databaseMap;
	}

	public void setDatabaseMap(Map<String, String> databaseMap) {
		this.databaseMap = databaseMap;
	}

	public Map<Integer, User> getStaffMap() {
		return staffMap;
	}

	public void setStaffMap(Map<Integer, User> staffMap) {
		this.staffMap = staffMap;
	}

	public String[] getTitleArray() {
		return titleArray;
	}

	public void setTitleArray(String[] titleArray) {
		this.titleArray = titleArray;
	}

	public User[] getStaffArray() {
		return staffArray;
	}

	public void setStaffArray(User[] staffArray) {
		this.staffArray = staffArray;
	}

	public Properties getProperties() {
		return properties;
	}

	public void setProperties(Properties properties) {
		this.properties = properties;
	}

	@Override
	public String toString() {
		return "Department [titleList=" + titleList + ", staffList=" + staffList + ", titleSet=" + titleSet
				+ ", staffSet=" + staffSet + ", databaseMap=" + databaseMap + ", staffMap=" + staffMap + ", titleArray="
				+ Arrays.toString(titleArray) + ", staffArray=" + Arrays.toString(staffArray) + ", properties="
				+ properties + "]";
	}	
}
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<?xml version="1.0" encoding="UTF-8"?>
<!-- 头文件 -->
<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="title04" class="java.lang.String">
		<constructor-arg name="original" value="title04"></constructor-arg>
	</bean>
	<bean id="staff02" class="com.course.vo.User">
		<property name="id" value="2"></property>
		<property name="name" value="staff02"></property>
		<property name="address" value="address02"></property>
	</bean>
	
	<!-- list集合属性注入 -->
	<bean id="departmentList" class="com.course.vo.Department">
		<property name="titleList">
			<list>
				<value>title01</value>
				<value>title02</value>
				<value>title03</value>
				<ref bean="title04" />
				<bean class="java.lang.String">
					<constructor-arg name="original" value="title05"></constructor-arg>
				</bean>
			</list>
		</property>
		<property name="staffList">
			<list>
				<bean class="com.course.vo.User">
					<property name="id" value="1"></property>
					<property name="name" value="staff01"></property>
					<property name="address" value="address01"></property>
				</bean>
				<ref bean="staff02" />
			</list>
		</property>
	</bean>
	
	<!-- Set属性的注入 -->
	<bean id="departmentSet" class="com.course.vo.Department">
		<property name="titleSet">
			<set>
				<value>title01</value>
				<value>title02</value>
				<value>title03</value>
				<ref bean="title04" />
				<bean class="java.lang.String">
					<constructor-arg name="original" value="title05"></constructor-arg>
				</bean>
			</set>
		</property>
		<property name="staffSet">
			<set>
				<bean class="com.course.vo.User">
					<property name="id" value="1"></property>
					<property name="name" value="staff01"></property>
					<property name="address" value="address01"></property>
				</bean>
				<ref bean="staff02" />
			</set>
		</property>
	</bean>
	
	<!-- Map属性的注入 -->
	<bean id="urlVal" class="java.lang.String">
		<constructor-arg name="original" value="http://ip:port/database"></constructor-arg>
	</bean>
	<bean id="usernameKey" class="java.lang.String">
		<constructor-arg name="original" value="username"></constructor-arg>
	</bean>
	<bean id="passwordKey" class="java.lang.String">
		<constructor-arg name="original" value="root"></constructor-arg>
	</bean>
	<bean id="passwordVal" class="java.lang.String">
		<constructor-arg name="original" value="123456"></constructor-arg>
	</bean>
	
	<bean id="departmentMap" class="com.course.vo.Department">
		<property name="databaseMap">
			<map>
				<entry key="driver" value="com.mysql.jdbc.Driver"></entry>
				<entry key="url" value-ref="urlVal"></entry>
				<entry key-ref="usernameKey" value="root"></entry>
				<entry key-ref="passwordKey" value-ref="passwordVal"></entry>
			</map>
		</property>
		<property name="staffMap">
			<map>
				<entry key="1">
					<bean class="com.course.vo.User">
						<property name="id" value="1"></property>
						<property name="name" value="staff01"></property>
						<property name="address" value="address01"></property>
					</bean>
				</entry>
				<entry key="2" value-ref="staff02"></entry>
			</map>
		</property>
	</bean>
	
	<!-- 数组属性的注入 -->
	<bean id="departmentArray" class="com.course.vo.Department">
		<property name="titleArray">
			<array>
				<value>title01</value>
				<value>title02</value>
				<value>title03</value>
				<ref bean="title04" />
				<bean class="java.lang.String">
					<constructor-arg name="original" value="title05"></constructor-arg>
				</bean>
			</array>
		</property>
		<property name="staffArray">
			<array>
				<bean class="com.course.vo.User">
					<property name="id" value="1"></property>
					<property name="name" value="staff01"></property>
					<property name="address" value="address01"></property>
				</bean>
				<ref bean="staff02" />
			</array>
		</property>
	</bean>
	
	<!-- Properties属性的注入 -->
	<bean id="departmentProperties" class="com.course.vo.Department">
		<property name="properties">
			<props>
				<prop key="driver">com.mysql.jdbc.Driver</prop>
				<prop key="url">http://ip:port/database</prop>
				<prop key="username">root</prop>
				<prop key="password">123456</prop>
			</props>
		</property>
	</bean>
	
</beans>
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package com.test;

import java.util.Date;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.course.vo.Department;
import com.course.vo.User;

public class TestMain {

	public static void main(String[] args) {
		ApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
		
		Department departmentList = (Department) applicationContext.getBean("departmentList");
		System.out.println(departmentList);
        // Department [titleList=[title01, title02, title03, title04, title05], staffList=[User [id=1, name=staff01, address=address01, hireDate=null], User [id=2, name=staff02, address=address02, hireDate=null]], titleSet=null, staffSet=null, databaseMap=null, staffMap=null, titleArray=null, staffArray=null, properties=null]
		
		Department departmentSet = (Department) applicationContext.getBean("departmentSet");
		System.out.println(departmentSet);
        // Department [titleList=null, staffList=null, titleSet=[title01, title02, title03, title04, title05], staffSet=[User [id=1, name=staff01, address=address01, hireDate=null], User [id=2, name=staff02, address=address02, hireDate=null]], databaseMap=null, staffMap=null, titleArray=null, staffArray=null, properties=null]
		
		Department departmentMap = (Department) applicationContext.getBean("departmentMap");
		System.out.println(departmentMap);
        // Department [titleList=null, staffList=null, titleSet=null, staffSet=null, databaseMap={driver=com.mysql.jdbc.Driver, url=http://ip:port/database, username=root, root=123456}, staffMap={1=User [id=1, name=staff01, address=address01, hireDate=null], 2=User [id=2, name=staff02, address=address02, hireDate=null]}, titleArray=null, staffArray=null, properties=null]
		
		Department departmentArray = (Department) applicationContext.getBean("departmentArray");
		System.out.println(departmentArray);
        // Department [titleList=null, staffList=null, titleSet=null, staffSet=null, databaseMap=null, staffMap=null, titleArray=[title01, title02, title03, title04, title05], staffArray=[User [id=1, name=staff01, address=address01, hireDate=null], User [id=2, name=staff02, address=address02, hireDate=null]], properties=null]
		
		Department departmentProperties = (Department) applicationContext.getBean("departmentProperties");
		System.out.println(departmentProperties);
        // Department [titleList=null, staffList=null, titleSet=null, staffSet=null, databaseMap=null, staffMap=null, titleArray=null, staffArray=null, properties={password=123456, driver=com.mysql.jdbc.Driver, url=http://ip:port/database, username=root}]
		
	}
}

xml自动注入

UserService

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package com.course.service.impl;

import com.course.dao.UserDao;
import com.course.service.UserService;
import com.course.vo.User;

public class UserServiceImpl implements UserService {
	
	private UserDao userDao;

	// set()
	public void setUserDao(UserDao userDao) {
		this.userDao = userDao;
	}

	@Override
	public User getUserInfo(Integer id) {
		User user = userDao.getUser(id);
		return user;
	}
}

UserController

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package com.course.controller;

import com.course.service.UserService;
import com.course.vo.User;

public class UserController {

	private UserService userService;
	
	// set()
	public void setUserService(UserService userService) {
		this.userService = userService;
	}

	public User getUserById(Integer id) {
		User user = userService.getUserInfo(id);
		return user;
	}
}

application.xml

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<?xml version="1.0" encoding="UTF-8"?>
<!-- 头文件 -->
<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">
        
        
    <!-- 
        autowire: 自动注入
            - byName: 根据类的属性名，将IoC容器中id=属性名的对象注入进来
            - byType: 根据类的属性类型，将IoC容器该类型的对象或该类型的子类对象注入进来
     -->
	<bean id="userDao" class="com.course.dao.impl.UserDaoImpl">
	</bean>
	
	<bean id="userService" class="com.course.service.impl.UserServiceImpl" autowire="byName">
	</bean>
	
	<bean id="userController" class="com.course.controller.UserController" autowire="byType">
	</bean>
</beans>

测试类

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package com.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.course.controller.UserController;
import com.course.vo.User;

public class TestMain {

	public static void main(String[] args) {
		ApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
		System.out.println(applicationContext);
		
		UserController userController = (UserController) applicationContext.getBean("userController");
		User user = userController.getUserById(1);
		System.out.println(user);
        // User [id=1, name=Tom1, address=location1]
	}
}