一、通过@PathVariable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", "获取URL的参数");
return "users";
}
例如，访问user/123/hello路径时，执行以上方法，其中，参数id=123，name=hello
二、@ModelAttribute获取POST请求的FORM表单数据
页面表单记得加上name属性
<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>
用来接收的Java类：
public class Pojo{
private String a;
private int b;
//setter、getter
}
Java的controller：
@RequestMapping(method = RequestMethod.POST)
public String processSubmit(@ModelAttribute("pojo") Pojo pojo) { System.out.println(pojo.getA());
System.out.println(pojo.getB());
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)
@RequestMapping(value = "/requestParam", method = RequestMethod.GET)
public String setupForm(@RequestParam("a") String a, ModelMap model) {
System.out.println(a);
return "helloWorld";
}