SPRING MVC 的请求参数获取的几种方法

SPRING MVC 的请求参数获取的几种方法

通过@PathVariabl注解获取路径中传递参数

JAVA

@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;

}

JAVA controller

@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

@RequestMapping(value = "/requestParam", method = RequestMethod.GET)

public String setupForm(@RequestParam("a") String a, ModelMap model) {

System.out.println(a);

return "helloWorld";}