我如何解决错误“状态”：500，“错误”：“内部服务器错误”答案

【问题标题】：how i can resolve the error "status": 500, "error": "Internal Server Error"我如何解决错误“状态”：500，“错误”：“内部服务器错误”
【发布时间】：2020-05-30 04:37:24
【问题描述】：

我正在为我的网站开发注册页面的后端部分，问题是当我在邮递员中测试时出现以下错误：

我的 Eclipse 控制台中也出现此错误：

2020-05-29 17:58:06.226 ERROR 1368 --- [nio-8484-exec-8] o.h.engine.jdbc.spi.SqlExceptionHelper   : ORA-01400: impossible d'insérer NULL dans ("NAWFEL"."ORDO_DEP_UTILISATEUR"."IDENTIFIANT")

2020-05-29 17:58:06.230 ERROR 1368 --- [nio-8484-exec-8] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement] with root cause

oracle.jdbc.OracleDatabaseException: ORA-01400: impossible d'insérer NULL dans ("NAWFEL"."ORDO_DEP_UTILISATEUR"."IDENTIFIANT")

    at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:513) ~[ojdbc8-19.3.0.0.jar:19.3.0.0.0]
    at oracle.jdbc.driver.T4CTTIoer11.processError(T4CTTIoer11.java:461) ~[ojdbc8-19.3.0.0.jar:19.3.0.0.0]
    at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1104) ~[ojdbc8-19.3.0.0.jar:19.3.0.0.0]
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:550) ~[ojdbc8-19.3.0.0.jar:19.3.0.0.0]
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:268) ~[ojdbc8-19.3.0.0.jar:19.3.0.0.0]
    at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:655) ~[ojdbc8-19.3.0.0.jar:19.3.0.0.0]
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:270) ~[ojdbc8-19.3.0.0.jar:19.3.0.0.0]
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:91) ~[ojdbc8-19.3.0.0.jar:19.3.0.0.0]
    at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:970) ~[ojdbc8-19.3.0.0.jar:19.3.0.0.0]
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1205) ~[ojdbc8-19.3.0.0.jar:19.3.0.0.0]

我看到错误来自 id，但正如您在此处看到的，我在 json 部分的 postman 中插入了 id：

{
    "id":2,
    "EMPLOI":2,
    "ENTITE":2,
    "LOGIN":"hr",
    "MOTDEPASSE":"hr",
    "NOM":"bougrine",
    "PRENOM":"rachid",
    "STATUT":"br",
    "CREEPAR": 2
}

这是我在我的应用程序中配置 spring 安全性的代码：

package com.app.habilitation.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;


@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {


    @Override
    protected void configure (HttpSecurity http) throws Exception {

        http.cors();
        http.csrf().disable();
        http.authorizeRequests().antMatchers("/**").
        fullyAuthenticated().and().httpBasic();
    }


    @Override
    protected void configure (AuthenticationManagerBuilder auth) throws Exception {

        auth.inMemoryAuthentication()
        .withUser("hr")
        .password("{noop}hr").roles("USER");
    }


}

这是我的控制器：

package com.app.habilitation.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

import com.app.habilitation.entity.UserEntity;
import com.app.habilitation.service.UserService;

@SpringBootApplication
@RestController
@CrossOrigin(origins = "*")
public class UserController {

    private UserService userService;

    @Autowired
    public UserController (UserService theuserService) {
        userService=theuserService;
    }


    @GetMapping("/")
    public String login() {
        return "authenticaated succesfully";
    }


    @GetMapping("/getUsers") 
    public String getUsers() {
        return "users";
    }


    @PostMapping("/addUser")
    public UserEntity addUser (@RequestBody UserEntity theUser) {

        System.out.println("test");
        userService.save(theUser);

        return theUser;
    }
}

这是我的道（我使用 jpa）：

package com.app.habilitation.dao;

import org.springframework.data.jpa.repository.JpaRepository;

import com.app.habilitation.entity.UserEntity;

public interface UserDao extends JpaRepository<UserEntity, Integer> {



}

这是我的实体类：

package com.app.habilitation.entity;

import java.sql.Date;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

@Entity
@Table(name="ORDO_DEP_UTILISATEUR")
public class UserEntity {


    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name="IDENTIFIANT")
    private Integer IDENTIFIANT;

    /*@ManyToOne(cascade = {CascadeType.DETACH, CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH})
    @JoinColumn(name="EMPLOI") */
    @Column(name="EMPLOI")
    private Integer emploi;

    /* @ManyToOne(cascade = {CascadeType.DETACH, CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH})
    @JoinColumn(name="ENTITE") */
    @Column(name="ENTITE")
    private Integer entite;


    @Column(name="LOGIN")
    private String login;


    @Column(name="MOTDEPASSE")
    private String mdp;


    @Column(name="nom")
    private String nom;

    @Column(name="prenom")
    private String prenom;

    @Column(name="CREEPAR")
    private Integer creerpar;

    @Column(name="ANNULEPAR")
    private Integer annulepar;

    @Column(name="STATUT")
    private String statut;

    @Column(name="DATEEFFET")
    private Date dateeffet;


    @Column(name="DATEFIN")
    private Date datefin;

    @Column(name="CREELE")
    private Date creele;

    @Column(name="MOTIFDEDESACTIVATION")
    private String motifdedesactivation;

    @Column(name="ANNULELE")
    private Date annulele;

    public Integer getIDENTIFIANT() {
        return IDENTIFIANT;
    }

    public void setIDENTIFIANT(Integer iDENTIFIANT) {
        IDENTIFIANT = iDENTIFIANT;
    }

    public Integer getEmploi() {
        return emploi;
    }

    public void setEmploi(Integer emploi) {
        this.emploi = emploi;
    }

    public Integer getEntite() {
        return entite;
    }

    public void setEntite(Integer entite) {
        this.entite = entite;
    }

    public String getLogin() {
        return login;
    }

    public void setLogin(String login) {
        this.login = login;
    }

    public String getMdp() {
        return mdp;
    }

    public void setMdp(String mdp) {
        this.mdp = mdp;
    }

    public String getNom() {
        return nom;
    }

    public void setNom(String nom) {
        this.nom = nom;
    }

    public String getPrenom() {
        return prenom;
    }

    public void setPrenom(String prenom) {
        this.prenom = prenom;
    }

    public Integer getCreerpar() {
        return creerpar;
    }

    public void setCreerpar(Integer creerpar) {
        this.creerpar = creerpar;
    }

    public Integer getAnnulepar() {
        return annulepar;
    }

    public void setAnnulepar(Integer annulepar) {
        this.annulepar = annulepar;
    }

    public String getStatut() {
        return statut;
    }

    public void setStatut(String statut) {
        this.statut = statut;
    }

    public Date getDateeffet() {
        return dateeffet;
    }

    public void setDateeffet(Date dateeffet) {
        this.dateeffet = dateeffet;
    }

    public Date getDatefin() {
        return datefin;
    }

    public void setDatefin(Date datefin) {
        this.datefin = datefin;
    }

    public Date getCreele() {
        return creele;
    }

    public void setCreele(Date creele) {
        this.creele = creele;
    }

    public String getMotifdedesactivation() {
        return motifdedesactivation;
    }

    public void setMotifdedesactivation(String motifdedesactivation) {
        this.motifdedesactivation = motifdedesactivation;
    }

    public Date getAnnulele() {
        return annulele;
    }

    public void setAnnulele(Date annulele) {
        this.annulele = annulele;
    }

    public UserEntity(Integer iDENTIFIANT, Integer emploi, Integer entite, String login, String mdp, String nom,
            String prenom, Integer creerpar, Integer annulepar, String statut, Date dateeffet, Date datefin,
            Date creele, String motifdedesactivation, Date annulele) {
        IDENTIFIANT = iDENTIFIANT;
        this.emploi = emploi;
        this.entite = entite;
        this.login = login;
        this.mdp = mdp;
        this.nom = nom;
        this.prenom = prenom;
        this.creerpar = creerpar;
        this.annulepar = annulepar;
        this.statut = statut;
        this.dateeffet = dateeffet;
        this.datefin = datefin;
        this.creele = creele;
        this.motifdedesactivation = motifdedesactivation;
        this.annulele = annulele;
    }

    public UserEntity() {
    }

    @Override
    public String toString() {
        return "UserEntity [IDENTIFIANT=" + IDENTIFIANT + ", emploi=" + emploi + ", entite=" + entite + ", login="
                + login + ", mdp=" + mdp + ", nom=" + nom + ", prenom=" + prenom + ", creerpar=" + creerpar
                + ", annulepar=" + annulepar + ", statut=" + statut + ", dateeffet=" + dateeffet + ", datefin="
                + datefin + ", creele=" + creele + ", motifdedesactivation=" + motifdedesactivation + ", annulele="
                + annulele + "]";
    }



}

这是我的服务接口：

package com.app.habilitation.service;

import java.util.List;

import com.app.habilitation.entity.UserEntity;



public interface UserService {




    public void save (UserEntity theUser);


}

这是我的服务接口Impl：

package com.app.habilitation.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.app.habilitation.dao.UserDao;
import com.app.habilitation.entity.UserEntity;

@Service
public class UserServiceImpl implements UserService {

    private UserDao userDao;

    @Autowired

    public UserServiceImpl (UserDao theuserDao) {

        userDao = theuserDao;
    }



    @Override
    @Transactional
    public void save(UserEntity theUser) {

        userDao.save(theUser);

    }



}

这是我的 application.properties（我将端口 8080 更改为 8484，因为另一个应用程序使用此端口）：

spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver
spring.datasource.url=jdbc:oracle:thin:@localhost:1521:XE
spring.datasource.username=nawfel       
spring.datasource.password=hr

spring.jpa.show-sql=true
server.port=8484

这是我在 oracle 10g 中的表：

【问题讨论】：

问：如何解决错误“status”：500，“error”？ A：在服务器上找到问题，并修复它。 Q: 如何修复`ORA-01400: cannot insert null into (string)
你的二传手错了。你应该做this.IDENTIFIANT= IDENTIFIANT 而不是IDENTIFIANT= IDENTIFIANT 将值分配给自己。你的构造函数也有同样的缺陷！
我把 this.IDENTIFIANT= IDENTIFIANT 但他不工作:(
你能试试 GenerationType.auto 还是 sequence.可能是 oracle 10g 不支持标识列。

标签： spring oracle spring-boot rest postman

【解决方案1】：

我认为问题在于您在实体中告诉 id 是生成的值。这样做会在插入期间由 Jpa 删除该值。您必须更改策略，如果您提供 id，则不应将其标记为自动生成。 hth

【讨论】：