在jsp中直接获取spring中的bean实例

最新推荐文章于 2020-04-15 09:19:50 发布

wang_52

最新推荐文章于 2020-04-15 09:19:50 发布

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本文链接：https://blog.youkuaiyun.com/wang_52/article/details/25319005

本文展示了一个使用Spring框架与JSP集成的例子，通过在JSP页面中调用Spring上下文来获取NewspaperService实例，并利用HQL查询从数据库中检索报纸数据。

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<%@page import="com.msAccess.service.impl.NewspaperServiceImpl"%>
<%@page import="java.util.ArrayList"%>
<%@page import="java.util.List"%>
<%@page import="com.msAccess.service.NewspaperService"%>
<%@ page language="java" contentType="text/html;charset=utf-8"%>
<%@ page import="org.springframework.web.context.support.WebApplicationContextUtils"%>
<%@ page import="org.springframework.web.context.WebApplicationContext"%>
<%@ page import="com.msAccess.vo.Newspaper" %>
<%
String path2 = request.getContextPath();
String basePath2 = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path2+"/";

ServletContext context = request.getSession().getServletContext();
WebApplicationContext wac = WebApplicationContextUtils.getWebApplicationContext(context);
NewspaperService newspaperService = (NewspaperServiceImpl)wac.getBean("newspaperService");
List<Object> newspaperList = new ArrayList<Object>();
String hql = "from Newspaper where '1'=?";
newspaperList = newspaperService.findNewspapersByHQL(hql, new Object[]{"1"});
int i = newspaperList.size();

代码如上，但首先需要在项目中添加spring-web-3.2.0.M2.jar包