Spring3 MVC请求参数获取的几种方法[转]

mac2022-06-30  63

Spring3 MVC请求参数获取的几种方法

Spring3 MVC请求参数获取的几种方法

一、      通过@PathVariabl获取路径中的参数

@RequestMapping(value="user/{id}/{name}",method=RequestMethod.GET) public String printMessage1(@PathVariable String id,@PathVariable String name, ModelMap model) { System.out.println(id); System.out.println(name); model.addAttribute("message", "111111"); return "users"; }

例如,访问user/123/lei路径时,执行以上方法,其中,参数id=123,name=lei

二、      @ModelAttribute获取POST请求的FORM表单数据

JSP表单如下

<form method="post" action="hao.do"> a: <input id="a" type="text" name="a"/> b: <input id="b" type="text" name="b"/> <input type="submit" value="Submit" /> </form>

 

Java  Pojo如下

public class Pojo{ private String a; private int b; }

 

Java Controller如下

@RequestMapping(method = RequestMethod.POST) public String processSubmit(@ModelAttribute("pojo") Pojo pojo) { return "helloWorld"; }

三、      直接用HttpServletRequest获取

@RequestMapping(method = RequestMethod.GET) public String get(HttpServletRequest request, HttpServletResponse response) { System.out.println(request.getParameter("a")); return "helloWorld"; }

四、      用注解@RequestParam绑定请求参数

用注解@RequestParam绑定请求参数a到变量a

当请求参数a不存在时会有异常发生,可以通过设置属性required=false解决,

例如: @RequestParam(value="a", required=false)

Controller如下

@RequestMapping(value = "/requestParam", method = RequestMethod.GET) public String setupForm(@RequestParam("a") String a, ModelMap model) { System.out.println(a); return "helloWorld"; }

转载于:https://www.cnblogs.com/qiyebao/p/4648250.html

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