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Spring根據(jù)XML配置文件 p名稱空間注入屬性的實(shí)例

 更新時(shí)間:2017年11月16日 09:03:18   作者:Advancing-Swift  
下面小編就為大家分享一篇Spring根據(jù)XML配置文件 p名稱空間注入屬性的實(shí)例,具有很好的參考價(jià)值。希望對(duì)大家有所幫助

要生成對(duì)象并通過(guò)名稱空間注入屬性的類 代碼如下:

package com.swift;

public class User {
 private String userName;
 
 public void setUserName(String userName) {
  this.userName = userName;
 }
 public String fun() {
  return "User's fun is ready."+this.userName;
 }
}

XML配置文件寫法如下:

<?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:p="http://www.springframework.org/schema/p"
 xsi:schemaLocation="
  http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- IoC 控制反轉(zhuǎn) SpringSpring根據(jù)XML配置文件生成對(duì)象 -->
<bean id="user" class="com.swift.User" p:userName="peach"></bean>
</beans>

p:userName="peach"

p:后是屬性的變量名 后面是賦值

約束是xmlns:p="http://www.springframework.org/schema/p"

生成對(duì)象及屬性值調(diào)用方法,代碼如下:

package com.swift;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

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

@WebServlet("/test")
public class TestIOC extends HttpServlet {
 private static final long serialVersionUID = 1L;
 public TestIOC() {
  super();
 }
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  response.getWriter().append("Served at: ").append(request.getContextPath());
  @SuppressWarnings("resource")
  //就是下邊這幾句了
  ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
  User user=(User) context.getBean("user");
  String userInfo=user.fun();
  response.getWriter().println();
  response.getWriter().append(userInfo);
 }

 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  doGet(request, response);
 }

}

以上這篇Spring根據(jù)XML配置文件 p名稱空間注入屬性的實(shí)例就是小編分享給大家的全部?jī)?nèi)容了,希望能給大家一個(gè)參考,也希望大家多多支持腳本之家。

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