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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