Spring入门之bean属性注入集合

来源：互联网发布：linux下echo命令编辑：程序博客网时间：2024/05/16 08:12
Spring中的bean的属性值有时候包含一些集合类型的属性值，注入属性值的方式和注入一些基本的属性值不一样，他们需要使用专门的方式来注入

常用的集合类型包括: Map、Set、List、数组、属性集合

实例代码:

//person类public class Person {    private String name;    private Integer age;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }}//测试bean类public class AllSetBean {    private String[] names;    private List<Person> personlist;    private Set<Person> personset;    private Map<Integer, Person> personmap;    private Properties personprop;    public String[] getNames() {        return names;    }    public void setNames(String[] names) {        this.names = names;    }    public List<Person> getPersonlist() {        return personlist;    }    public void setPersonlist(List<Person> personlist) {        this.personlist = personlist;    }    public Set<Person> getPersonset() {        return personset;    }    public void setPersonset(Set<Person> personset) {        this.personset = personset;    }    public Map<Integer, Person> getPersonmap() {        return personmap;    }    public void setPersonmap(Map<Integer, Person> personmap) {        this.personmap = personmap;    }    public Properties getPersonprop() {        return personprop;    }    public void setPersonprop(Properties personprop) {        this.personprop = personprop;    }}//beans.xml配置文件<bean id="person1" class="org.spring.IocSet.Person">            <property name="name" value="成兮" />            <property name="age" value="20" />        </bean>        <bean id="person2" class="org.spring.IocSet.Person">            <property name="name" value="缘分五月" />            <property name="age" value="20" />        </bean>        <bean id="allSet" class="org.spring.IocSet.AllSetBean">            <!-- 注入数组 -->            <property name="names">                <list>                    <value>成兮</value>                    <value>缘分五月</value>                </list>            </property>            <!-- 注入List集合 -->            <property name="personlist">                <list>                    <ref bean="person1" />                    <ref bean="person2" />                </list>            </property>            <!-- 注入Set集合 -->            <property name="personset">                <set>                    <ref bean="person1" />                    <ref bean="person2" />                </set>            </property>            <!-- 注入Map集合 -->            <property name="personmap">                <map>                    <entry key="1" value-ref="person1" />                    <entry key="2" value-ref="person2" />                </map>            </property>            <!-- 注入属性值 -->            <property name="personprop">                <props>                    <prop key="username">chengxi</prop>                    <prop key="password">970624</prop>                </props>            </property>        </bean>//测试主程序public class TestMain {    public static void main(String[] args){        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");        AllSetBean bean = context.getBean("allSet",AllSetBean.class);        //测试数组        String[] names = bean.getNames();        System.out.println("测试数组");        for(String name: names){            System.out.println("name->"+name);        }        //测试List        List<Person> personl = bean.getPersonlist();        System.out.println("测试List");        for(Person person: personl){            System.out.println("person.name->"+person.getName()+"\tperson.age->"+person.getAge());        }        //测试Set        Set<Person> persons = bean.getPersonset();        System.out.println("测试Set");        for(Person person: persons){            System.out.println("person.name->"+person.getName()+"\tperson.age->"+person.getAge());        }        //测试Map        Map<Integer,Person> personm = bean.getPersonmap();        System.out.println("测试Map");        Iterator it = personm.keySet().iterator();        while(it.hasNext()){            Integer key = (Integer) it.next();            Person person = personm.get(key);            System.out.println("key->"+key+"\tperson.name->"+person.getName()+"\tperson.age->"+person.getAge());        }        //Property属性值测试        Properties personprop = bean.getPersonprop();        System.out.println("测试Properties属性");        for(Entry<Object,Object> entry:personprop.entrySet()){              System.out.println(entry.getKey().toString()+" "+entry.getValue().toString());          }          System.out.println("*****通过Enumeration取出*****");          Enumeration en= personprop.keys();          while(en.hasMoreElements()){              String key=(String) en.nextElement();              System.out.println(key+" "+personprop.getProperty(key));          }      }}
文档转载自: Spring中使用Map、Set、List、数组、属性集合的注入方法配置文件

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