为啥我的 MySql 出现用户注册错误

Posted 2023-02-26

【中文标题】为啥我的 MySql 出现用户注册错误

【英文标题】：Why do i have User registration error with MySql为什么我的 MySql 出现用户注册错误

【发布时间】：2021-02-07 08:28:11

【问题描述】：

我是 mysql 的新手，当我尝试注册新用户时出现错误

java.sql.SQLSyntaxErrorException：您的 SQL 语法有错误；检查与您的 MySQL 服务器版本相对应的手册，以在第 1 行的“id，角色）值（25，'USER'）'附近使用正确的语法 在 com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:120) ~[mysql-connector-java-8.0.21.jar:8.0.21]

注册控制器.Java `

package com.example.fitter.controller;

import com.example.fitter.domain.Role;
import com.example.fitter.domain.User;
import com.example.fitter.repos.UserRepo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

import java.util.Collections;
import java.util.Map;

@Controller
public class RegistrationController 
    @Autowired
    private UserRepo userRepo;

    @GetMapping("/registration")
    public String registration() 
        return "registration";
    

    @PostMapping("/registration")
    public String addUser(User user, Map<String, Object> model) 
        User userFromDb = userRepo.findByUsername(user.getUsername());

        if (userFromDb != null) 
            model.put("message", "User exists!");
            return "registration";
        

        user.setActive(true);
        user.setRoles(Collections.singleton(Role.USER));
        userRepo.save(user);

        return "redirect:/login";
    
 

` WebSecurityConfig.Java

``` package com.example.fitter.config;

import org.springframework.beans.factory.annotation.Autowired;
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.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.password.NoOpPasswordEncoder;

import javax.sql.DataSource;

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter 
    @Autowired
    private DataSource dataSource;

    @Override
    protected void configure(HttpSecurity http) throws Exception 
        http
                .authorizeRequests()
                .antMatchers("/", "/registration").permitAll()
                .anyRequest().authenticated()
                .and()
                .formLogin()
                .loginPage("/login")
                .permitAll()
                .and()
                .logout()
                .permitAll();
    

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception 
        auth.jdbcAuthentication()
                .dataSource(dataSource)
                .passwordEncoder(NoOpPasswordEncoder.getInstance())
                .usersByUsernameQuery("select username, password, active from usr where username=?")
                .authoritiesByUsernameQuery("select u.username, ur.roles from usr u inner join user_role ur on u.id = ur.user_id where u.username=?");
    

User.Java

package com.example.fitter.domain;

import javax.persistence.*;
import java.util.Set;

@Entity
@Table(name = "usr")
public class User 
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private String username;
    private String password;
    private boolean active;

    @ElementCollection(targetClass = Role.class, fetch = FetchType.EAGER)
    @CollectionTable(name = "userRole", joinColumns = @JoinColumn(name = "user id"))
    @Enumerated(EnumType.STRING)
    private Set<Role> roles;

    public User()
    public Long getId() 
        return id;
    

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

    public String getUsername() 
        return username;
    

    public void setUsername(String username) 
        this.username = username;
    

    public String getPassword() 
        return password;
    

    public void setPassword(String password) 
        this.password = password;
    

    public boolean isActive() 
        return active;
    

    public void setActive(boolean active) 
        this.active = active;
    

    public Set<Role> getRoles() 
        return roles;
    

    public void setRoles(Set<Role> roles) 
        this.roles = roles;
    

'

【问题讨论】：

在@JoinColumn(name = "user id") 中，user 和 id 之间有错字（空格）。检查这是否不是问题。

【参考方案1】：

这个好像错了：

@JoinColumn(name = "user id")

我猜是表中的user_id，所以应该是：

@JoinColumn(name = "user_id")

【参考方案2】：

在 User.Java 而不是 @CollectionTable(name = "userRole", joinColumns = @JoinColumn(name = "user id")) 中的错误太愚蠢了 @CollectionTable(name = "user_role", joinColumns = @JoinColumn(name = "user_id"))