Spring MVC缺少URI模板变量

lf5gs5x2 于 2022-11-14 发布在 Spring

关注(0)|答案(4)|浏览(142)

我有一个Controller类，它有一个将记录保存到数据库的函数。我正在传递几个参数给Controller函数，但是我想我可能写错了@RequestMapping。下面是代码

控制器

@RequestMapping(value="createRoadBlock.htm", method = RequestMethod.POST)
 public @ResponseBody Integer createRoadBlock(@RequestParam String purpose, @RequestParam String userName,
                                              @RequestParam  int status, @RequestParam double latAdd,
                                              @RequestParam double longAdd, HttpServletRequest request,  
                                              HttpServletResponse response) {

         int roadBlockId = 0;
        try{

            roadBlockId = roadBlockManager.saveRoadBlock(purpose, userName, status,latAdd,longAdd);
            logger.info("Create Road Block Successful roadBlockId "+ roadBlockId);

            return roadBlockId;

        }catch(Exception e){
            logger.error("Exception Occured In Road Block Controller "+e.getMessage());
            return roadBlockId;

        } 

     }

** AJAX 请求**

$.ajax({
    type:'POST',
    url:'createRoadBlock.htm',
    contentType:"application/json",
    async:false,
    cache:false,
        data:{purpose:f_purpose, userName:f_userName,status: f_status,latAdd: f_latAdd, longAdd:f_lngAdd},
    dataType:'json'

    }).success(function(recordId){ 
                console.log('Road Block created with id ' + recordId);
    });

错误日志

Controller [com.crimetrack.web.RoadBlockController]
Method [public java.lang.Integer com.crimetrack.web.RoadBlockController.createRoadBlock(java.lang.String,java.lang.String,int,double,double,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)]

org.springframework.web.bind.MissingServletRequestParameterException: Required String parameter 'purpose' is not present
    at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:201)
    at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:90)
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:75)
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:156)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:117)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)

spring-mvc

来源：https://stackoverflow.com/questions/19803117/spring-mvc-missing-uri-template-variable

4条答案

按热度按时间

nhjlsmyf1#

@PathVariable用来告诉Spring，URI路径的一部分是您想要传递给方法的值。这是您想要的吗？或者变量应该是发布到URI的表单数据吗？
如果需要表单数据，请使用@RequestParam而不是@PathVariable。
如果你想要@PathVariable，你需要在@RequestMapping条目中指定占位符，告诉Spring路径变量在URI中的位置。例如，如果你想要提取一个名为contentId的路径变量，你可以用途：
@RequestMapping(value = "/whatever/{contentId}", method = RequestMethod.POST)

Edit：此外，如果您的路径变量可能包含一个.“”，而您想要该部分数据，那么您需要告诉Spring获取所有内容，而不仅仅是.“”之前的内容：

@RequestMapping(value = "/whatever/{contentId:.*}", method = RequestMethod.POST)
这是因为Spring的默认行为是将URL的该部分视为文件扩展名，并将其从变量提取中排除。

赞(0）回复(0）举报 2022-11-14

7ivaypg92#

我得到这个错误是因为一个愚蠢的错误，在@PathVariable中的变量名与在@RequestMapping中的变量名不匹配
比如说

@RequestMapping(value = "/whatever/{**contentId**}", method = RequestMethod.POST)
public … method(@PathVariable Integer **contentID**){
}

它可能会帮助其他人

赞(0）回复(0）举报 2022-11-14

ego6inou3#

当您在REST定义中定义Map变量与@PathVariable名称不匹配时，可能会发生此错误
示例：假设您在REST定义中定义了

@GetMapping(value = "/{appId}", produces = "application/json", consumes = "application/json")

然后在定义函数时，应

public ResponseEntity<List> getData(@PathVariable String appId)

当您使用REST控制器定义中未定义的任何其他变数搭配@PathVariable时，可能会发生此错误。例如，下列程式码会引发错误，因为ID与appId变数名称不同：

public ResponseEntity<List> getData(@PathVariable String ID)

赞(0）回复(0）举报 2022-11-14

gxwragnw4#

我的问题是来自方法的参数的名称不同于在@GetMapping中传递的名称。它们应该相同，否则将出现这种无提示错误。

@GetMapping("/{formId}") // Must be the same as the PathVariable
    public ResponseEntity<Form> getFormById(@PathVariable Long formId){
        return new ResponseEntity<Form>(this.formsService.getById(formId), HttpStatus.OK);
    }

赞(0）回复(0）举报 2022-11-14

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Spring MVC缺少URI模板变量

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