Spring MVC 的请求参数获取

Spring MVC 的请求参数获取

1.通过@PathVariabl注解获取路径中传递参数

@RequestMapping(value="/{id}/{str}")
publicModelAndViewhelloWorld(@PathVariableStringid,
@PathVariableStringstr){
System.out.println(id);
System.out.println(str);
returnnewModelAndView("/helloWorld");
}

2.用@ModelAttribute注解获取POST请求的FORM表单数据

<formmethod="post"action="hao.do">
a:<inputid="a"type="text"name="a"/>
b:<inputid="b"type="text"name="b"/>
<inputtype="submit"value="Submit"/>
</form>

JAVA pojo

publicclassPojo{
privateStringa;
privateintb;
....

3.直接用HttpServletRequest获取

@RequestMapping(method=RequestMethod.GET)
publicStringget(HttpServletRequestrequest,HttpServletResponseresponse){
System.out.println(request.getParameter("a"));
return"helloWorld";
}

4.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)

@RequestMapping(value="/requestParam",method=RequestMethod.GET)
publicStringsetupForm(@RequestParam("a")Stringa,ModelMapmodel){
System.out.println(a);
return"helloWorld";
}

Spring MVC 的请求参数获取

1.通过@PathVariabl注解获取路径中传递参数

@RequestMapping(value="/{id}/{str}")
publicModelAndViewhelloWorld(@PathVariableStringid,
@PathVariableStringstr){
System.out.println(id);
System.out.println(str);
returnnewModelAndView("/helloWorld");
}

2.用@ModelAttribute注解获取POST请求的FORM表单数据

<formmethod="post"action="hao.do">
a:<inputid="a"type="text"name="a"/>
b:<inputid="b"type="text"name="b"/>
<inputtype="submit"value="Submit"/>
</form>

JAVA pojo

publicclassPojo{
privateStringa;
privateintb;
....

3.直接用HttpServletRequest获取

@RequestMapping(method=RequestMethod.GET)
publicStringget(HttpServletRequestrequest,HttpServletResponseresponse){
System.out.println(request.getParameter("a"));
return"helloWorld";
}

4.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)

@RequestMapping(value="/requestParam",method=RequestMethod.GET)
publicStringsetupForm(@RequestParam("a")Stringa,ModelMapmodel){
System.out.println(a);
return"helloWorld";
}