springmvc请求接收参数的几种方式
2016-12-19 本文已影响105人
shineegirl
通过@PathVariabl注解获取路径中传递参数
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代码下载地址:http://www.zuidaima.com/share/1751862044773376.htm
@RequestMapping(value= " /{id}/{str} " ) public ModelAndView helloWorld(@PathVariable String id, @PathVariable String str) { System.out.println(id); System.out.println(str); return new ModelAndView( " /helloWorld " ); }
用@ModelAttribute注解获取POST请求的FORM表单数据
JSP
<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
public class Pojo{ private String a; private int b; }
@RequestMapping(method= RequestMethod.POST) public String processSubmit(@ModelAttribute( " pojo " ) Pojo pojo) { return " helloWorld " ; }
直接用HttpServletRequest获取
JAVA
@RequestMapping(method= RequestMethod.GET) public String get(HttpServletRequest request, HttpServletResponse response) { System.out.println(request.getParameter( " a " )); return " helloWorld " ; }
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)
JAVA