我在RequestMapping这里使用Spring MVC 作为GET参数。下面是我的代码-
RequestMapping
GET
@RequestMapping(value = "index", method = RequestMethod.GET) public HashMap<String, String> handleRequest(@RequestParam("dc1Servers") String dc1Servers, @RequestParam("dc2Servers") String dc2Servers, @RequestParam("dc3Servers") String dc3Servers) { HashMap<String, String> model = new HashMap<String, String>(); String helloWorld = "Hello World!"; model.put("greeting", helloWorld); System.out.println(dc1Servers); System.out.println(dc2Servers); System.out.println(dc3Servers); return model; }
我点击了这个URL- http://127.0.0.1:8080/dataweb/index?dc1Servers=3&dc2Servers=3&dc3Servers=3然后进入上面的代码,并3在控制台上打印出所有打印内容,并且工作正常。
http://127.0.0.1:8080/dataweb/index?dc1Servers=3&dc2Servers=3&dc3Servers=3
3
现在,如果你看,我有dc1,dc2和dc3。
dc1
dc2
dc3
因此dc1,我想将这些作为参数发送到URL中-
dc1Servers=3 dc1HostA dc1HostB dc1HostC dc1IPAddresssA dc1IPAddresssB dc1IPAddresssC
同样,对于dc2,我想将其作为参数发送到URL中-
dc2Servers=3 dc2HostA dc2HostB dc2HostC dc2IPAddresssA dc2IPAddresssB dc2IPAddresssC
同样,对于dc3,我想将其作为参数发送到URL中-
dc3Servers=3 dc3HostA dc3HostB dc3HostC dc3IPAddresssA dc3IPAddresssB dc3IPAddresssC
现在,我不确定如何为该用例构造一个URL,我的方法将如何?我想通过一个URL调用发送它们。
使用Spring MVC是否可以使用此用例?
您可以按照自己认为合适的任何方式传递参数,一种方法是按如下所示的自然分组传递参数: http://127.0.0.1:8080/dataweb/index?dc1Server=dc1HostA,dc1IPAddressA&dc1Server=dcHostB,dc1IPAddressB....
http://127.0.0.1:8080/dataweb/index?dc1Server=dc1HostA,dc1IPAddressA&dc1Server=dcHostB,dc1IPAddressB....
通过为每个组使用相同的参数名称,您需要使用MultiValueMap。A MultiValueMap或多或少是a Map<String, List<String>>,因此具有相同名称(dc1Server,dc2Server等)的参数将在同一列表中。您将使用它来获取传递的参数的完整列表,如下所示:
MultiValueMap
Map<String, List<String>>
public HashMap<String, String> handleRequest(@RequestParam MultiValueMap<String,String> allRequestParams)
然后,您将拥有3个键,其中dc1Server将包含所有dc1Server数据,dc2Server所有dc2Server等
dc1Server
dc2Server
@ModelAttribute如果要直接映射到域对象,可以考虑使用:链接
@ModelAttribute
编辑
public void testSpringMultiValueMap() { MultiValueMap<String, String> map = new LinkedMultiValueMap<String, String>(); map.add("dc1Server", "dc1HostA,dc1IPAddressA"); map.add("dc1Server", "dc1HostB,dc1IPAddressB"); map.add("dc1Server", "dc1HostC,dc1IPAddressC"); map.add("dc2Server", "dc2HostA,dc2IPAddressA"); map.add("dc2Server", "dc2HostB,dc2IPAddressB"); map.add("dc2Server", "dc2HostC,dc2IPAddressC"); List<String> dc1List = map.get("dc1Server"); for(String pair: dc1List) { String[] tokens = pair.split(","); System.out.println("host: " + tokens[0] + " ip: " + tokens[1]); } }