峰Spring4学习（3）注入参数的几种类型

People.java  model类：

package com.cy.entity;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

public class People {
    private int id;
    private String name;
    private int age;
    private Dog dog;
    private List<String> hobbies = new ArrayList<String>();
    private Set<String> loves = new HashSet<String>();
    private Map<String,String> works = new HashMap<String,String>();
    private Properties addresses = new Properties();

    public People() {
        super();
        // TODO Auto-generated constructor stub
    }
    public People(int id, String name, int age) {
        super();
        this.id = id;
        this.name = name;
        this.age = age;
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }

    public Dog getDog() {
        return dog;
    }
    public void setDog(Dog dog) {
        this.dog = dog;
    }
    public List<String> getHobbies() {
        return hobbies;
    }
    public void setHobbies(List<String> hobbies) {
        this.hobbies = hobbies;
    }
    public Set<String> getLoves() {
        return loves;
    }
    public void setLoves(Set<String> loves) {
        this.loves = loves;
    }
    public Map<String, String> getWorks() {
        return works;
    }
    public void setWorks(Map<String, String> works) {
        this.works = works;
    }
    public Properties getAddresses() {
        return addresses;
    }
    public void setAddresses(Properties addresses) {
        this.addresses = addresses;
    }

    @Override
    public String toString() {
        return "People [id=" + id + ", name=" + name + ", age=" + age
                + ", dog=" + dog.getName() + ", hobbies=" + hobbies + ", loves=" + loves
                + ", works=" + works + ", addresses=" + addresses + "]";
    }

}

com.cy.entity.Dog: Model类：

package com.cy.entity;

public class Dog {
    private String name;

    public String getName() {
        return name;
    }

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

}

spring管理bean配置文件：

beans.xml:

<?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">

    <!-- 基本类型值 -->
     <bean id="people1" class="com.cy.entity.People">
         <property name="id" value="1"></property>
         <property name="name" value="张三"></property>
         <property name="age" value="11"></property>
     </bean>

     <bean id="dog1" class="com.cy.entity.Dog">
         <property name="name" value="Jack"></property>
     </bean>

     <!-- 注入bean -->
     <bean id="people2" class="com.cy.entity.People">
         <property name="id" value="2"></property>
         <property name="name" value="李四"></property>
         <property name="age" value="14"></property>
         <property name="dog" ref="dog1"></property>
     </bean>

     <!-- 内部bean -->
     <bean id="people3" class="com.cy.entity.People">
         <property name="id" value="3"></property>
         <property name="name" value="王五"></property>
         <property name="age" value="13"></property>
         <property name="dog">
             <bean class="com.cy.entity.Dog">
                 <property name="name" value="Tom"></property>
             </bean>
         </property>
     </bean>

     <!-- null值 -->
     <bean id="people4" class="com.cy.entity.People">
         <property name="id" value="4"></property>
         <property name="name" value="赵六"></property>
         <property name="age" value="14"></property>
         <property name="dog">
             <null></null>
         </property>
     </bean>

     <!-- 级联属性 直接这么写，但是people中的dog为null值，会报错，在People dog属性初始化时，直接Dog dog = new Dog() -->
     <!--
     <bean id="people5" class="com.cy.entity.People">
         <property name="id" value="5"></property>
         <property name="name" value="孙七"></property>
         <property name="age" value="14"></property>
         <property name="dog.name" value="jack2"></property>
     </bean> -->

     <!-- 集合属性 -->
     <bean id="people6" class="com.cy.entity.People">
         <property name="id" value="6"></property>
         <property name="name" value="P6"></property>
         <property name="age" value="16"></property>
         <property name="dog" ref="dog1"></property>
         <property name="hobbies">
             <list>
                 <value>唱歌</value>
                 <value>跳舞</value>
             </list>
         </property>
         <property name="loves">
             <set>
                 <value>唱歌2</value>
                 <value>跳舞2</value>
             </set>
         </property>
         <property name="works">
             <map>
                 <entry>
                     <key><value>上午</value></key>
                     <value>写代码</value>
                 </entry>
                 <entry>
                     <key><value>下午</value></key>
                     <value>测试代码</value>
                 </entry>
             </map>
         </property>
         <property name="addresses">
             <props>
                 <prop key="address1">aaaa</prop>
                 <prop key="address2">bbbb</prop>
             </props>
         </property>
     </bean>
</beans>

测试代码：

package com.cy.test;

import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.cy.entity.People;

public class T {

    private ApplicationContext ac;

    @Before
    public void setUp() throws Exception {
         ac=new ClassPathXmlApplicationContext("beans.xml");
    }

    //基本类型值
    @Test
    public void test() {
        People people1 = (People) ac.getBean("people1");
        System.out.println(people1);
    }

    //注入bean
    @Test
    public void test2() {
        People people2 = (People) ac.getBean("people2");
        System.out.println(people2);
    }

    //内部bean
    @Test
    public void test3() {
        People people3 = (People) ac.getBean("people3");
        System.out.println(people3);
    }

    //注入null值
    @Test
    public void test4() {
        People people4 = (People) ac.getBean("people4");
        System.out.println(people4);
    }

    //级联属性  测试代码直接在People类下面初始化dog，Dog dog = new Dog()
    @Test
    public void test5() {
        People people5 = (People) ac.getBean("people5");
        System.out.println(people5);
    }

    //注入集合属性
    @Test
    public void test6() {
        People people6 = (People) ac.getBean("people6");
        System.out.println(people6);
        //People [id=6, name=P6, age=16, dog=Jack, hobbies=[唱歌, 跳舞], loves=[唱歌2, 跳舞2], works={上午=写代码, 下午=测试代码}, addresses={address2=bbbb, address1=aaaa}]

    }

}