记录下jsp页面中request、session、modelAndView、app代码,Java代码库,德仔网

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【Java】记录下jsp页面中request、session、modelAndView、app
作者: / 发布于2017/3/3/ 635
package com.my.innerParam.test;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * 测试几个内置变量中在EL读取的顺序
 * @author rocky
 *
 */
@Controller
public class InnerParam
{
    @RequestMapping("/innerParamTest")
    public String innerParamTest(HttpServletRequest request,HttpServletResponse response,Model model)
    {
        HttpSession session = request.getSession();
        session.setAttribute("session", "session223");
        
        ServletContext application = request.getServletContext();
       // application.setInitParameter("appicationParam", "appicationParam");
        //Initialization parameters can not be set after the context has been initialized
        application.setAttribute("appicationAttr", "applicationAttr");
        request.setAttribute("request", "request");
       
        
        model.addAttribute("model", "model123");
        return "/testParam/testParam1";
    }
    
    //当变量名字相同时判断EL表达式用哪一个
    @RequestMapping("/innerParamTest2")
    public String innerParamTest2(HttpServletRequest request,HttpServletResponse response,Model model)
    {
        HttpSession session = request.getSession();
        session.setAttribute("test", "session223");
        
        ServletContext application = request.getServletContext();
       // application.setInitParameter("appicationParam", "appicationParam");
        //Initialization parameters can not be set after the context has been initialized
        application.setAttribute("test", "applicationAttr");
  
        request.setAttribute("test", "request");
        model.addAttribute("test", "model123");
        return "/testParam/testParam2";
    }
    
    //当model是null的时候
    @RequestMapping("/innerParamTest3")
    public String innerParamTest3(HttpServletRequest request,HttpServletResponse response,Model model)
    {
        HttpSession session = request.getSession();
        session.setAttribute("test", "session223");
        
        ServletContext application = request.getServletContext();
       // application.setInitParameter("appicationParam", "appicationParam");
        //Initialization parameters can not be set after the context has been initialized
        application.setAttribute("test", "applicationAttr");
  
        request.setAttribute("test", "request");
        model.addAttribute("test", null);
        return "/testParam/testParam3";
    }
}
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