Java 学习 Spring 的 @RequestBody 和 @RequestParam
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learning Spring's @RequestBody and @RequestParam
提问by Josh
I'm editing a web project that uses Spring and I need to adding some of Spring's annotations. Two of the ones I'm adding are @RequestBodyand @RequestParam. I've been poking around a little and found this, but I still don't completely understand how to use these annotations. Could anyone provide an example?
我正在编辑一个使用 Spring 的 web 项目，我需要添加一些 Spring 的注释。我要添加的两个是@RequestBody和@RequestParam。我一直在四处摸索，发现了this，但我仍然不完全了解如何使用这些注释。谁能提供一个例子？
回答by Arjan
Controller example:
控制器示例：
@Controller
class FooController {
@RequestMapping("...")
void bar(@RequestBody String body, @RequestParam("baz") baz) {
//method body
}
}
@RequestBody:variable body will contain the body of the HTTP request
@RequestBody：变量 body 将包含 HTTP 请求的正文
@RequestParam:variable baz will hold the value of request parameter baz
@RequestParam：变量 baz 将保存请求参数 baz 的值
回答by Patrik Bego
@RequestParamannotated parameters get linked to specific Servlet request parameters. Parameter values are converted to the declared method argument type. This annotation indicates that a method parameter should be bound to a web request parameter.
@RequestParam注释参数链接到特定的 Servlet 请求参数。参数值被转换为声明的方法参数类型。该注解表示方法参数应该绑定到 Web 请求参数。
For example Angular request for Spring RequestParam(s) would look like that:
例如，Spring RequestParam(s) 的 Angular 请求将如下所示：
$http.post('http://localhost:7777/scan/l/register', {params: {"username": $scope.username, "password": $scope.password, "auth": true}}).
success(function (data, status, headers, config) {
...
})
@RequestMapping(method = RequestMethod.POST, produces = "application/json", value = "/register")
public Map<String, String> register(Model uiModel,
@RequestParam String username, @RequestParam String password, boolean auth,
HttpServletRequest httpServletRequest) {...
@RequestBodyannotated parameters get linked to the HTTP request body. Parameter values are converted to the declared method argument type using HttpMessageConverters. This annotation indicates a method parameter should be bound to the body of the web request.
@RequestBody注释参数链接到 HTTP 请求正文。使用 HttpMessageConverters 将参数值转换为声明的方法参数类型。这个注解表明一个方法参数应该绑定到 Web 请求的主体。
For example Angular request for Spring RequestBody would look like that:
例如，Spring RequestBody 的 Angular 请求看起来像这样：
$scope.user = {
username: "foo",
auth: true,
password: "bar"
};
$http.post('http://localhost:7777/scan/l/register', $scope.user).
success(function (data, status, headers, config) {
...
})
@RequestMapping(method = RequestMethod.POST, produces = "application/json", value = "/register")
public Map<String, String> register(Model uiModel,
@RequestBody User user,
HttpServletRequest httpServletRequest) {...
Hope this helps.
希望这可以帮助。
