JavaBean集合对象注入属性学习篇
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2023-12-22 10:44:56
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JavaBean集合对象注入属性
下面是 bean集合类。
//定义了Map,set,list
public class setys
{
private Map<String,String> map;
private Set<String> set;
private List<String> list;
public Map<String, String> getMap() {
return map;
}
public void setMap(Map<String, String> map) {
this.map = map;
}
public Set<String> getSet() {
return set;
}
public void setSet(Set<String> set) {
this.set = set;
}
public List<String> getList() {
return list;
}
public void setList(List<String> list) {
this.list = list;
}
}
下面是 xml的配置（初始化集合数据）。
<?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"
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">
<bean id="setys" class="com.lh.util.setys">
<property name="map">
<map>
<entry key="1" value="Java"></entry>
<entry key="2" value="C++"></entry>
<entry key="3" value="Python"></entry>
</map>
</property>
<property name="set">
<set>
<value>LOL</value>
<value>DOTA</value>
</set>
</property>
<property name="list">
<list>
<value>男</value>
<value>女</value>
</list>
</property>
</bean>
</beans>
下面是 前端代码（采用JSTL库中的JSON输出）。
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ page import="org.springframework.core.io.*"%>
<%@ page import="org.springframework.beans.factory.BeanFactory"%>
<%@ page import="org.springframework.beans.factory.xml.XmlBeanFactory"%>
<%@ page import="org.springframework.context.ApplicationContext"%>
<%@ page import="org.springframework.context.support.ClassPathXmlApplicationContext"%>
<%@ page import="com.lh.entity.*"%>
<%@ page import="com.lh.util.*"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<base href="<%=basePath%>">
<title>为JavaBean的集合对象注入属性值</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<body>
<%
ApplicationContext context=new ClassPathXmlApplicationContext("one.xml");//获取ApplicationContext容器
setys setys1 = (setys) context.getBean("setys"); // 指定Bean的名称来取得Bean实例
%>
<center>
<br>输出list集合中的元素：<br><br>
<c:forEach var="list" items="<%=setys1.getList() %>">
${list}<br/>
</c:forEach>
<br> 输出set集合中的元素：<br><br>
<c:forEach var="set" items="<%=setys1.getSet() %>">
${set}<br/>
</c:forEach>
<br> 输出map集合中的元素：<br><br>
<c:forEach var="map" items="<%=setys1.getMap() %>">
${map.value}<br/>
</c:forEach>
</center>
</body>
</html>
下面是前端打印出的集合值。
奥利给。