Spring Boot 控制器中的 Lombok 注解导入问题-解网

问：

我正在尝试使用 h2 数据库和 lombok 对 spring 进行 CRUD，它给了我这样的错误：

java.lang.IllegalArgumentException：给定的 id 不能为空

我的控制器：

package br.edu.unicesumar.crud.controller;

import br.edu.unicesumar.crud.model.domain.Pessoa;
import br.edu.unicesumar.crud.model.repository.PessoaRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/pessoa")
public class PessoaController {

    @Autowired
    private PessoaRepository pessoaRepository;

    @GetMapping
    public List<Pessoa> all() {
        return pessoaRepository.findAll();
    }

    @GetMapping("/{id}")
    public Pessoa getById(@PathVariable Long id) {
        return pessoaRepository.findById(id).orElse(null);
    }

    @PostMapping
    public Pessoa create(@RequestBody Pessoa nova) {
        return pessoaRepository.save(nova);
    }

    @DeleteMapping("/{id}")
    public void delete(@PathVariable Long id) {
        pessoaRepository.deleteById(id);
    }

}

我的实体服务：

package br.edu.unicesumar.crud.model.domain;

import jakarta.persistence.*;

@Entity
@Table(name = "ES_PESSOA")  // para tabelas com nome diferente da entidade
public class Pessoa {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    private String nome;

    @Column(name = "doc", length = 14) // se necessário, informar atribuições para a coluna
    private String documento;


    public Pessoa(Long id, String nome, String documento) {
        this.id = id;
        this.nome = nome;
        this.documento = documento;
    }

    public Pessoa() {
    }

    // getters e setters necessários para serializar e deserializar a classe para json

    public Long getId() {
        return id;
    }

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

    public String getNome() {
        return nome;
    }

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

    public String getDocumento() {
        return documento;
    }

    public void setDocumento(String documento) {
        this.documento = documento;
    }
}

我的存储库：

package br.edu.unicesumar.crud.model.repository;

import br.edu.unicesumar.crud.model.domain.Pessoa;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface PessoaRepository extends JpaRepository<Pessoa, Long> {
}

我想知道为什么即使代码中没有包含@notnull验证，也需要和应用验证。

java spring 模型-视图-控制器 crud notnull

此异常在哪里引发？对于两者，id 都不能为 null，否则它们将抛出“IllegalArgumentException：给定的 id 不得为 null”，但我在您的代码中看不到您可以使用 null 参数调用这些方法中的任何一个的路径。JpaRespository.findById()JpaRepository.deleteById()

答：

0赞 Pedro Henrique Lomba 11/16/2023 #1

我是Java的初学者，但是，我相信它可能与pom.xml有关按照我的 pom 停止给出此错误：

    <?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.1.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>br.edu.unicesumar</groupId>
    <artifactId>crud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>crud</name>
    <description>Crud com MVC</description>
    <properties>
        <java.version>17</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.liquibase</groupId>
            <artifactId>liquibase-core</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</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>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

Spring Boot 控制器中的 Lombok 注解导入问题

Lombok annotation import problem in spring boot controller

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