spring MVC 参数传递

前台提交请求，后台通过名字获得数据

jsp

后台获得数据

String cInputName1=request.getParameter("input1Name");

注意这时后台不能通过getAttribute（）获得数据，因为要先setAttribute设置的数据然后getAttribute获得

后台代码如下，或跳转到MyJsp.jsp界面。

public String outPut(HttpServletResponse response,HttpServletRequest request ,ModelMap model){
		System.out.println("test");
		String cInputName1=request.getParameter("input1Name");
		request.setAttribute("mes", "setAttribute");
	//	String cInputName2=(String) request.getAttribute("mes1");
		System.out.println(cInputName1);
	//	System.out.println(cInputName2);
		return "MyJsp";
	}

MyJsp.jsp获得数据有以下方法

  	<%=request.getAttribute("mes") %>

  	${mes}

  	<%=request.getParameter("input1Name") %>

  	${param.input1Name}

  

其中第一句和第二句等效，第三句和第四句等效

或者直接通过控制器变量名进行获取

public ModelAndView outPut(String input1Name,String input2Name){
		System.out.println("test");
		System.out.println(input1Name+" "+input2Name);
		ModelAndView mav=new ModelAndView("MyJsp");
		return mav;
	}

或者通过给变量取别名

public ModelAndView outPut(@RequestParam("input1Name")String inputName,String input2Name){
		System.out.println("test");
		System.out.println(inputName+" "+input2Name);
		ModelAndView mav=new ModelAndView("MyJsp");
 return mav;} 
  
 
  
页面获得数据的方式
 
  
用ModelAndView对象传递
 
  
 
  
controller
 
  
ModelAndView mav=new ModelAndView("MyJsp");
mav.addObject("mes","asd");
 
  
jsp
 
  
<%=request.getAttribute("mes") %>

${mes}
 
  
 
  
 或者 
  
 
  
 
  
java
 
  
@RequestMapping("test.do")
	public ModelAndView outPut(Model model, String input1Name){
		model.addAttribute("mes","asd");
		System.out.println("test");
		model.addAttribute("mes","asd");
		ModelAndView mav=new ModelAndView("MyJsp");
		return mav;
	}
 
  
或者
 
  
@RequestMapping("test.html")
public ModelAndView outPut(HttpServletResponse response,HttpServletRequest request ,ModelMap model){
	Map map = new HashMap();
	map.put("mes","asd");
	ModelAndView mav=new ModelAndView("MyJsp");
	mav.addObject("mes","asd");
	return mav;
}
 
  
 
  
 
  
jsp
 
  
<%=request.getAttribute("mes") %>

${mes}