如何修复表单验证，当它不起作用时

Question

我需要你的帮助，表单验证不起作用，在阅读了几篇文章后，它仍然不起作用

这是我的pom.xml

<?xml version="1.0" encoding="UTF-8"?>

4.0.0org.springframework.boot弹簧引导启动器父级2.3.2.租赁com.king手势安全0.0.1快照手势安全Spring Boot 的和平安全项目

<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf</artifactId>
<version>3.0.11.RELEASE</version>
</dependency>

<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring4</artifactId>
<version>3.0.11.RELEASE</version>
</dependency>
<dependency>
<groupId>nz.net.ultraq.thymeleaf</groupId>
<artifactId>thymeleaf-layout-dialect</artifactId>
<version>2.4.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- <dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency> -->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

我的实体代理，我使用lomback作为getter和setter

package com.king.Entities;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import org.springframework.format.annotation.DateTimeFormat;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Entity
@Data @NoArgsConstructor @AllArgsConstructor
public class Agent implements Serializable {
@Id 
@NotNull
@Size(min=5,max=5)
private  String matricule;
@NotNull
@Size(min=4,max=15)
private String nom;
private String prenom;
private String postnom;
private String fonction;
private String typeagent;
private String niveaetude;
private String contact1;
private String contact2;
private String sexe;
private String adresse1;
private String adresse2;
private String photo;
@DateTimeFormat(pattern = "yyyy-MM-dd")
private Date dateNaiss;
private String lieuNais;
private String status;
}

这是我的控制器

@RequestMapping(value="/showFormAgent", method = RequestMethod.GET)
public String showFormAgent(Model model) {
model.addAttribute("agent", new Agent());
return "peacedrh/formAgent";
}
@RequestMapping(value="addAgent", method = RequestMethod.POST)
public String addAgent(@RequestParam(name="picture")MultipartFile file, Model model, String matricule, @Valid Agent A, BindingResult result) {


try {
if (!(file.isEmpty())) {
A.setPhoto(file.getOriginalFilename());
}
agentDao.AddAgent(matricule, A);

if (!(file.isEmpty())) {
A.setPhoto(file.getOriginalFilename());
file.transferTo(new File (imageDir+A.getMatricule()));

}

} catch (Exception e) {
// TODO: handle exception
model.addAttribute("error", e);
return  "redirect:/showFormAgent?matricule="+matricule+"&error="+e.getMessage();        
}
model.addAttribute("agent", agentDao.getBymatricule(matricule));
return "peacedrh/Accuse";

}

这是我的html页面(thymelaf(

<form role="form"  method="post" th:action="@{addAgent}" th:object="${agent}" enctype="multipart/form-data">
<div class="card-body">
<div class="form-group">
<label for="exampleInputEmail1">Matricule</label>
<input type="text" th:field="*{matricule}" class="form-control" id="exampleInputEmail1" placeholder="Enter Matricule"/>
<span class="text-danger" th:errors="*{matricule}">  </span>
</div>
<div class="row">
<div class="col-md-6">
<div class="form-group">
<label for="exampleInputEmail1">Nom</label>
<input type="text" th:field="*{nom}" class="form-control" id="exampleInputEmail1" placeholder="Enter Nom"/>
<span class="text-danger" th:errors="*{matricule}">  </span>

</div>
<div class="form-group">
<label for="exampleInputPassword1">Post nom</label>
<input type="text" th:field="*{postnom}"  class="form-control" id="exampleInputPassword1" placeholder="Post nom"/>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Prenom</label>
<input type="text" th:field="*{prenom}"  class="form-control" id="exampleInputPassword1" placeholder="Prenom"/>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Sexe</label>
<select th:field="*{sexe}">
<option value="M">M</option> 
<option value="F">F</option>
</select>
</div>
<div class="input-group mb-3">
<div class="form-group">
<label for="exampleInputPassword1">Statut Sociale</label>
<select th:field="*{status}">
<option value="Single">Single</option> 
<option value="Maried">Maried</option>
<option value="Veuve">Veuve</option>
<option value="Veuf">Veuf </option>
<option value="Divorce">Divorce</option>
<option value="separe">Separe(é)</option>

</select>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Lieu de naissance</label>
<input type="text" th:field="*{lieuNais}"  class="form-control" id="exampleInputPassword1" placeholder="Lieu de naissance"/>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Date de naissance</label>
<input type="date"  th:field="*{dateNaiss}"  class="form-control"/>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Niveau Etudet</label>
<input type="text" th:field="*{niveaetude}"  class="form-control" id="exampleInputPassword1" placeholder="Niveau d'étude"/>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Type Agent</label>
<select th:field="*{typeagent}">
<option value="Admin">Admnistratif</option> 
<option value="Terrain">Terrain</option>
</select>
</div>
</div>
</div>


<div class="col-md-6">

<div class="form-group">
<label for="exampleInputPassword1">Fonction</label>
<select th:field="*{fonction}">
<option value="Comptable">Comptable</option> 
<option value="DRH">Direc Res Hum</option>
</select>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Contact 1</label>
<input type="text" th:field="*{contact1}"  class="form-control" id="exampleInputPassword1" placeholder="Contat 1"/>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Contact 2</label>
<input type="text" th:field="*{contact2}"  class="form-control" id="exampleInputPassword1" placeholder="Contact 2"/>
</div>
<div class="form-group">
<label for="exampleInputFile">File input</label>
<div class="input-group">
<div class="custom-file">
<input type="file"  name="picture"  class="custom-file-input" id="exampleInputFile"/>
<label class="custom-file-label" for="exampleInputFile">Choose file</label>
</div>
</div> 
</div>
<div class="form-group">
<label for="exampleInputPassword1">Adresse 1</label>
<textarea  th:field="*{adresse1}"  class="form-control" rows="5" cols="5"></textarea>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Adresse 2</label>
<textarea  th:field="*{adresse2}"  class="form-control" rows="5" cols="5"></textarea>
</div>
</div>

</div>
<div class="card-footer">
<div class="row col-md-5 ml-20" >
<div class="col-md-6"><button type="submit" class="btn btn-primary">Submit</button></div>
<div class="col-md-6"><button type="reset" class="btn btn-primary">Cancel</button></div>
</div>
</div>
</form>

添加操作进行得很顺利，但表单验证仍然无法进行

Answer 1

您必须添加@RequestBody，因为您想从视图请求表单：

@Valid Agent A

成为

@Valid @RequestBody Agent A

否则，您可以在showFormAgent 上将Agent对象作为@ModelAttribute传递

public String showFormAgent(@ModelAttribute Agent A) {
return "peacedrh/formAgent";
}

然后从你的addAgent 中获取数据

@RequestMapping(value="addAgent", method = RequestMethod.POST)
public String addAgent(@ModelAttribute @Valid Agent A, BindingResult result) { //doSomething }

BindingResult保存验证结果，因此您必须检查是否有错误：

if (result.hasErrors()) {
return "previus_form";
} else {
return "success";
}