springmvc请求接收参数的几种方法

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


JAVA
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@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
 
 
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<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
 
 
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public class Pojo{  
private String a;  
private int b;  
 


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


直接用HttpServletRequest获取
JAVA
 
 
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@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
 
 
 
[java] view plaincopy
@RequestMapping(value= " /requestParam " , method= RequestMethod.GET)  
 public String setupForm(@RequestParam( " a " ) String a, ModelMap model) {  
 System.out.println(a);