Spring中使用MapSetList数组属性集合的注入方法配置文件

Posted 2020-09-28 jzdwajue

（1）下边的一个java类包括了全部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="財务部"/>

<!-- 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 中能够有相当的对象 -->
<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不能有同样的对象 -->
<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仅仅有key不一样，就能够装配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）怎样使用

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就可以

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