Spring - 永远不会调用@Valid验证

时间:2017-10-25 02:14:16

标签: java spring validation

尝试简单地验证我的bean的字段而不是手动执行它想要查看Spring Validation,但是到现在为止还没有多少运气。

简而言之:

当我调用@Valid

的方法时,似乎永远不会调用带有@RestController注释的验证

我的代码:

pom.xml(对于验证部分)

<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
    <version>1.1.0.Final</version>
</dependency>

Spring是版本4.1.1

验证

package mypackage;

import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;

public class UtenteValidator implements Validator{

    public UtenteValidator() {
        // TODO Auto-generated constructor stub
    }

    @Override
    public boolean supports(Class<?> clazz) {
        return UtenteLite.class.equals(clazz);
    }

//validation test
    @Override
    public void validate(Object target, Errors errors) {
        UtenteLite user = (UtenteLite) target;

          if(user.getName != "foo") {
              errors.rejectValue("name", "name not correct");
          }

    }




}

控制器

package myPackage;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;


@RestController
@RequestMapping("/users")
public class UsersController {


    public UsersController() {

    }

//tried to put @InitBinder, but no luck
    @InitBinder
    protected void initBinder(WebDataBinder binder) {
        binder.setValidator(new UtenteValidator());
    }

    @ResponseBody
    @RequestMapping(value="", method=RequestMethod.PUT)
    public <T> ResponseEntity<T> aggiornaUtente(@RequestBody @Valid UtenteLite utente, BindingResult result)
    {
        ResponseEntity<T> responseEntity=null;

        return responseEntity;
    }


}

Te BindingResult结果对象始终显示零错误,并且永远不会调用validatesupportsinitBinder方法。

找到这个tutorial,内容如下:

  

何时调用@InitBinder方法?

     

@InitBinder注释方法   如果我们没有指定“&#39;值”,则会在每个HTTP请求上调用   这个注释的元素。

     

WebDataBinder参数特定于模型属性。这意味着   每次Spring创建一个模型属性时,这个方法都会得到   使用WebDataBinder的新实例调用。

所以我尝试将我的控制器方法更改为添加@ModelAttribute ,并且现在验证代码被调用但是requestBody对象(&#34; utente&#34;对象)是空的,因此验证总是失败,因为字段都是空的:

@ResponseBody
    @RequestMapping(value="", method=RequestMethod.PUT)
    public <T> ResponseEntity<T> aggiornaUtente(@RequestBody @Valid @ModelAttribute("utente") UtenteLite utente, BindingResult result)
    { 
...
}

传递utente方法参数,并以JSON作为请求的主体。

1 个答案:

答案 0 :(得分:2)

好的,

经过几次尝试后,我成功地通过在我的pom.xml 中添加了hibernate-validation工件参考来生成一个有用的解决方案

我错误地认为只有在bean属性上使用usig验证注释(如@NotNull,@ Pattern等)时,hibernate-validator才是强制性的。)

因此,只有通过添加此片段,我才能解决我的问题(希望这可以节省几个小时的工作给其他人):

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>5.1.3.Final</version>
</dependency>

现在完整的代码是:

验证

package mypackage;

import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;

public class UtenteValidator implements Validator{

    public UtenteValidator() {
        // TODO Auto-generated constructor stub
    }

    @Override
    public boolean supports(Class<?> clazz) {
        return UtenteLite.class.equals(clazz);
    }

//validation test
    @Override
    public void validate(Object target, Errors errors) {
        UtenteLite user = (UtenteLite) target;

          if(user.getName != "foo") {
              errors.rejectValue("name", "name not correct");
          }

    }




}

控制器

package myPackage;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;


@RestController
@RequestMapping("/users")
public class UsersController {


    public UsersController() {

    }

//tried to put @InitBinder, but no luck
    @InitBinder
    protected void initBinder(WebDataBinder binder) {
        binder.setValidator(new UtenteValidator());
    }

    @ResponseBody
    @RequestMapping(value="", method=RequestMethod.PUT)
    public <T> ResponseEntity<T> aggiornaUtente(@RequestBody @Valid UtenteLite utente)
    {
        ResponseEntity<T> responseEntity=null;

        return responseEntity;
    }


}