Java Community | Help. Code. Learn.•6mo ago

Don't work import jakarta.validation.constraints.NotBlank;

Hi, i'm a student and actually i'm using Spring, but when i using @NotNull or @NotBlank didn't work i put the library for example: jakarta.validation.constraints.NotBlank; & jakarta.validation.constraints.NotNull; I'm also using Maven and in the post you can see the dependecies. Thank you, if you help me

10 Replies

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EloreuyOP•6mo ago

<dependencies>  <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency>  <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-validation</artifactId> </dependency> <dependency> <groupId>jakarta.validation</groupId> <artifactId>jakarta.validation-api</artifactId> <version>3.0.2</version> </dependency>  <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency>  <dependency> <groupId>jakarta.servlet.jsp.jstl</groupId> <artifactId>jakarta.servlet.jsp.jstl-api</artifactId> <version>3.0.0</version> </dependency> <dependency> <groupId>org.glassfish.web</groupId> <artifactId>jakarta.servlet.jsp.jstl</artifactId> <version>3.0.1</version> </dependency>  <dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> </dependency>  <dependency> <groupId>jakarta.servlet</groupId> <artifactId>jakarta.servlet-api</artifactId> <version>6.0.0</version> <scope>provided</scope> </dependency>  <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> There're the dependecies of my pom.xml

ayylmao123xdd•6mo ago

can you show the code where you use the annotations

EloreuyOP•6mo ago

```java
package com.gestionale.GestionaleAP;

import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.NotNull;
import jakarta.validation.constraints.Size;

public class Impiegato {

    @NotNull(message = "L'ID non può essere nullo")
    private Integer id;

    @NotBlank(message = "Il nome non può essere vuoto")
    @Size(min = 2, max = 50, message = "Il nome deve avere tra 2 e 50 caratteri")
    private String nome;

    @NotBlank(message = "Il cognome non può essere vuoto")
    @Size(min = 2, max = 50, message = "Il cognome deve avere tra 2 e 50 caratteri")
    private String cognome;

    @NotNull(message = "Lo stipendio non può essere nullo")
    private Double stipendio;

    // Getters e Setters

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getNome() {
        return nome;
    }

    public void setNome(String nome) {
        this.nome = nome;
    }

    public String getCognome() {
        return cognome;
    }

    public void setCognome(String cognome) {
        this.cognome = cognome;
    }

    public Double getStipendio() {
        return stipendio;
    }

    public void setStipendio(Double stipendio) {
        this.stipendio = stipendio;
    }
}
```

```java
package com.gestionale.GestionaleAP;

import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.NotNull;
import jakarta.validation.constraints.Size;

public class Impiegato {

    @NotNull(message = "L'ID non può essere nullo")
    private Integer id;

    @NotBlank(message = "Il nome non può essere vuoto")
    @Size(min = 2, max = 50, message = "Il nome deve avere tra 2 e 50 caratteri")
    private String nome;

    @NotBlank(message = "Il cognome non può essere vuoto")
    @Size(min = 2, max = 50, message = "Il cognome deve avere tra 2 e 50 caratteri")
    private String cognome;

    @NotNull(message = "Lo stipendio non può essere nullo")
    private Double stipendio;

    // Getters e Setters

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getNome() {
        return nome;
    }

    public void setNome(String nome) {
        this.nome = nome;
    }

    public String getCognome() {
        return cognome;
    }

    public void setCognome(String cognome) {
        this.cognome = cognome;
    }

    public Double getStipendio() {
        return stipendio;
    }

    public void setStipendio(Double stipendio) {
        this.stipendio = stipendio;
    }
}
```

Here

ayylmao123xdd•6mo ago

and how is this class used in a controller or how exactly for the validation to work you need to use the @valid annotation in the method

JavaBot•6mo ago

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EloreuyOP•6mo ago

Yeah

package com.gestionale.GestionaleAP;

import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.Validator;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class ImpiegatoCtr {

    @RequestMapping("/insertIMP")
    public void insert(Model m, @Valid @ModelAttribute("impForm") Impiegato imp, BindingResult r) {
        m.addAttribute("impForm", new Impiegato());
        if (r.hasErrors()) {
            System.err.println("Errore di validazione");
        }
    }
}

package com.gestionale.GestionaleAP;

import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.Validator;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class ImpiegatoCtr {

    @RequestMapping("/insertIMP")
    public void insert(Model m, @Valid @ModelAttribute("impForm") Impiegato imp, BindingResult r) {
        m.addAttribute("impForm", new Impiegato());
        if (r.hasErrors()) {
            System.err.println("Errore di validazione");
        }
    }
}

JavaBot•6mo ago

💤 Post marked as dormant

This post has been inactive for over 300 minutes, thus, it has been archived. If your question was not answered yet, feel free to re-open this post or create a new one. In case your post is not getting any attention, you can try to use /help ping. Warning: abusing this will result in moderative actions taken against you.

ayylmao123xdd•6mo ago

you are importing the validated annotation not the valid one

JavaBot•6mo ago

Post Closed

This post has been closed by <@796803817424552008>.

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Don't work import jakarta.validation.constraints.NotBlank;

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