java - 带有 { } 大括号的 Spring MVC @Path 变量

Question

我正在使用 Spring Boot 开发应用程序。在 REST Controller 中，我更喜欢使用路径变量(@PathVariabale 注释)。我的代码获取路径变量，但它包含 { } 大括号，因为它在 url 中。请任何人建议我解决这个问题

@RequestMapping(value = "/user/item/{loginName}", method = RequestMethod.GET)
public void getSourceDetails(@PathVariable String loginName) {
    try {
        System.out.println(loginName);
        // it print like this  {john}
    } catch (Exception e) {
        LOG.error(e);
    }
}

网址

http://localhost:8080/user/item/{john}

Controller 输出

{约翰}

Answer 1

使用 http://localhost:8080/user/item/john 来提交您的请求。

你给 Spring 的路径变量 loginName 赋予一个值“{john}”，所以 Spring 用“{}”得到它

Web MVC framework声明

URI Template Patterns

URI templates can be used for convenient access to selected parts of a URL in a @RequestMapping method.

A URI Template is a URI-like string, containing one or more variable names. When you substitute values for these variables, the template becomes a URI. The proposed RFC for URI Templates defines how a URI is parameterized. For example, the URI Template http://www.example.com/users/{userId} contains the variable userId. Assigning the value fred to the variable yields http://www.example.com/users/fred.

In Spring MVC you can use the @PathVariable annotation on a method argument to bind it to the value of a URI template variable:

@RequestMapping(value="/owners/{ownerId}", method=RequestMethod.GET)
 public String findOwner(@PathVariable String ownerId, Model model) {
     Owner owner = ownerService.findOwner(ownerId);
     model.addAttribute("owner", owner);
     return "displayOwner"; 
  }

The URI Template " /owners/{ownerId}" specifies the variable name ownerId. When the controller handles this request, the value of ownerId is set to the value found in the appropriate part of the URI. For example, when a request comes in for /owners/fred, the value of ownerId is fred.