Spring中使用Map、Set、List、数组、属性集合的注入方法配置文件

（1）下边的一个Java类包含了所有Map、Set、List、数组、属性集合等这些容器，主要用于演示spring的注入配置；

 

package com.lc.collection;

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

public class Department {

    private String name;
    private String [] empName;//数组
    private List<Employee> empList;//list集合
    private Set<Employee> empsets;//set集合
    private Map<String,Employee> empMaps;//map集合
    private Properties pp;//Properties的使用


    public Set<Employee> getEmpsets() {
        return empsets;
    }
    public void setEmpsets(Set<Employee> empsets) {
        this.empsets = empsets;
    }
    public String[] getEmpName() {
        return empName;
    }
    public void setEmpName(String[] empName) {
        this.empName = empName;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public List<Employee> getEmpList() {
        return empList;
    }
    public void setEmpList(List<Employee> empList) {
        this.empList = empList;
    }
    public Map<String, Employee> getEmpMaps() {
        return empMaps;
    }
    public void setEmpMaps(Map<String, Employee> empMaps) {
        this.empMaps = empMaps;
    }
    public Properties getPp() {
        return pp;
    }
    public void setPp(Properties pp) {
        this.pp = pp;
    }

}

（2）Spring配置文件beans.xml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"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:tx="http://www.springframework.org/schema/tx"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
                http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
                http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

<bean id="department" class="com.hsp.collection.Department">
<property name="name" value="财务部"/>

<!-- 给数组注入值 -->
<property name="empName">
    <list>
        <value>小明</value>
        <value>小明小明</value>
        <value>小明小明小明小明</value>
    </list>
</property>

<!-- 给list注入值 list 中可以有相当的对象 -->
<property name="empList">
    <list>
        <ref bean="emp2" />
        <ref bean="emp1"/>
        <ref bean="emp1"/>
        <ref bean="emp1"/>
        <ref bean="emp1"/>
        <ref bean="emp1"/>
        <ref bean="emp1"/>
    </list>
</property>

<!-- 给set注入值 set不能有相同的对象 -->
<property name="empsets">
    <set>
        <ref bean="emp1" />
        <ref bean="emp2"/>
        <ref bean="emp2"/>
        <ref bean="emp2"/>
        <ref bean="emp2"/>
    </set>
</property>

<!-- 给map注入值 map只有key不一样，就可以装配value -->
<property name="empMaps">
    <map>
        <entry key="11" value-ref="emp1" />
        <entry key="22" value-ref="emp2"/>
        <entry key="22" value-ref="emp1"/>
    </map>
</property>

<!-- 给属性集合配置 -->
<property name="pp">
    <props>
        <prop key="pp1">abcd</prop>
        <prop key="pp2">hello</prop>
    </props>
</property>
</bean>

<bean id="emp1" class="com.hsp.collection.Employee">
    <property name="name" value="北京"/>
    <property name="id" value="1"/>
</bean>
<bean id="emp2" class="com.hsp.collection.Employee">
    <property name="name" value="天津"/>
    <property name="id" value="2"/>
</bean>

</beans>

 

（3）如何使用

 

package com.lc.collection;

import java.util.Enumeration;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import java.util.Map.Entry;

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

public class App1 {


    public static void main(String[] args) {

        ApplicationContext ac=new ClassPathXmlApplicationContext("com/lc/collection/beans.xml");
        Department department=(Department) ac.getBean("department");
        System.out.println(department.getName());
        for(String emName:department.getEmpName()){
            System.out.println(emName);
        }
        /*
         * 通过list集合取出数据
         */
        System.out.println("**********通过list集合取出数据*****");
        for(Employee e : department.getEmpList()){
            System.out.println("name="+e.getName()+" "+e.getId());
        }
        /*
         * 通过set集合取出数据
         */
        System.out.println("**********通过set集合取出数据*****");
        for(Employee e : department.getEmpsets()){

            System.out.println("name="+e.getName());
        }
        /*
         * 通过map集合取出数据 迭代器
         */
        System.out.println("*******通过map集合取出数据 迭代器****");

        //1.迭代器
        Map<String,Employee> empmaps=department.getEmpMaps();
        Iterator it=empmaps.keySet().iterator();
        while(it.hasNext()){
            String key=(String) it.next();
            Employee emp=empmaps.get(key);
            System.out.println("key="+key+" "+emp.getName());
        }

        System.out.println("*******通过map集合取出数据 简洁方法****");
        //2.简洁方法
        for(Entry<String,Employee> entry1:department.getEmpMaps().entrySet()){

            System.out.println(entry1.getKey()+" "+entry1.getValue().getName());
        }

        System.out.println("*****通过Propertis取出数据*****");
        Properties pp=department.getPp();
        for(Entry<Object,Object> entry:pp.entrySet()){
            System.out.println(entry.getKey().toString()+" "+entry.getValue().toString());
        }
        System.out.println("*****通过Enumeration取出*****");
        Enumeration en= pp.keys();
        while(en.hasMoreElements()){
            String key=(String) en.nextElement();
            System.out.println(key+" "+pp.getProperty(key));
        }
    }

}

 

（4）以后那些不知道的粘贴拷贝即可

 

 

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