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spring boot security 没有合适的构造器问题

作者:ajdxwz

这篇文章主要介绍了spring boot security 没有合适的构造器问题,具有很好的参考价值,希望对大家有所帮助,如有错误或未考虑完全的地方,望不吝赐教

bug 出现

在项目中使用spring security 进行用户登录验证,其中,出现了一个问题,久久不能解决

希望给遇到过同样的问题或者即将遇到这个问题的伙伴,一个参考

项目使用spring boot 和spring security进行开发,程序已经能正常运行,但是在打包项目时,会出现如下的编译错误。

项目打包时,遇到的错误,有时编译过,有时编译不过,反正各种不能编译

D5Utils.java:[16,46] sun.misc.BASE64Encoder是内部专用 API, 可能会在未来发行版中删除
[INFO] 6 warnings 
[INFO] -------------------------------------------------------------
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /E:/SVNdownload/zhongcheroof/zhongcheroof/src/main/java/com/xinda/models/dto/ReturnUserInfo.java:[12,1] 对于User(没有参数), 找不到合适的构造器
    构造器 org.springframework.security.core.userdetails.User.User(java.lang.String,java.lang.String,java.util.Collection<? extends org.springframework.security.core.GrantedAuthority>)不适用
      (实际参数列表和形式参数列表长度不同)
    构造器 org.springframework.security.core.userdetails.User.User(java.lang.String,java.lang.String,boolean,boolean,boolean,boolean,java.util.Collection<? extends org.springframework.security.core.GrantedAuthority>)不适用
      (实际参数列表和形式参数列表长度不同)
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.765 s
[INFO] Finished at: 2019-02-21T16:11:54+08:00
[INFO] Final Memory: 38M/283M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project zhongcheroof: Compilation failure
[ERROR] /E:/SVNdownload/zhongcheroof/zhongcheroof/src/main/java/com/xinda/models/dto/ReturnUserInfo.java:[12,1] 对于User(没有参数), 找不到合适的构造器
[ERROR] 构造器 org.springframework.security.core.userdetails.User.User(java.lang.String,java.lang.String,java.util.Collection<? extends org.springframework.security.core.GrantedAuthority>)不适用
[ERROR] (实际参数列表和形式参数列表长度不同)
[ERROR] 构造器 org.springframework.security.core.userdetails.User.User(java.lang.String,java.lang.String,boolean,boolean,boolean,boolean,java.util.Collection<? extends org.springframework.security.core.GrantedAuthority>)不适用
[ERROR] (实际参数列表和形式参数列表长度不同)
[ERROR] -> [Help 1]
[ERROR] 

项目中出现编译错误的代码如下:

登录的login接口

@Data
@Service
public class LoginValidate implements UserDetailsService{
	@Autowired
	private UserService userService;
	private User userInfo;
	
	@Autowired
	UserRepos userRepos;
	
	public UserDetails loadUserByUsername(String arg0) throws UsernameNotFoundException {
		 
		 userInfo = userService.getUserByUsername(arg0);
		if (userInfo == null){
            throw new UsernameNotFoundException("用户不存在!");
        }
		
		String loginTime = DateUtil.format(new Date(), "yyyy-MM-dd HH:mm:ss");
		userRepos.updateLoginTimeByUsername(userInfo.getUsername(),loginTime);
		
		List<GrantedAuthority> authorities = new ArrayList<GrantedAuthority>();
		switch (userInfo.getLevel()) {
		case 1://管理员
			authorities.add(new SimpleGrantedAuthority("ROLE_ADMIN"));
			System.err.println("用户权限:ROLE_ADMIN");
			break;
		case 2://普通用户
			authorities.add(new SimpleGrantedAuthority("ROLE_USER"));
			System.err.println("用户权限:ROLE_USER");
			break;
		default:
			throw new UsernameNotFoundException("用户权限配置错误");
		}
		System.err.println("进入login登录验证");
		ReturnUserInfo returnUserInfo = new ReturnUserInfo(userInfo.getUsername(), userInfo.getPassword(), authorities);
		returnUserInfo.setUsername(userInfo.getUsername());
		returnUserInfo.setUserLevel(userInfo.getLevel());
		returnUserInfo.setLoginTime(loginTime);
		returnUserInfo.setRole(UserLevelEnum.getName(userInfo.getLevel()));
		System.err.println("返回值:" + returnUserInfo);
		return returnUserInfo;
	}

}

返回给前端页面的实体类

@Data
public class ReturnUserInfo extends User{
	private String username;
	private int userLevel;
	private String role;
	private String loginTime;
	
	public ReturnUserInfo(String username, String password, Collection<? extends GrantedAuthority> authorities) {
		super(username, password, authorities);
	}
	public ReturnUserInfo(String username, String password, boolean enabled,
			boolean accountNonExpired, boolean credentialsNonExpired,
			boolean accountNonLocked, Collection<? extends GrantedAuthority> authorities) {
		super(username, password, true, true, true, true, authorities);
	}
	
}

上述代码导致了编译有时成功,有时不成功

问题原因及解决

在 ReturnUserInfo 中使用了 @Data 这个注解,

网上的说法是:

@Data 我自己尝试了下,我们使用 @Data 注解就可以有下面几个注解的功能: @ToString、@Getter、@Setter、@EqualsAndHashCode、@NoArgsConstructor 。

@Data
@NoArgsConstructor
@AllArgsConstructor
public class WarningInfo {
	private Picture picture;
	private Video video;
}

经过查询User的源码,发现确实User的这个类没有无参构造器,只有另外的两个构造器

public User(String username, String password,
			Collection<? extends GrantedAuthority> authorities) {
		this(username, password, true, true, true, true, authorities);
	}
public User(String username, String password, boolean enabled,
			boolean accountNonExpired, boolean credentialsNonExpired,
			boolean accountNonLocked, Collection<? extends GrantedAuthority> authorities) {

		if (((username == null) || "".equals(username)) || (password == null)) {
			throw new IllegalArgumentException(
					"Cannot pass null or empty values to constructor");
		}

		this.username = username;
		this.password = password;
		this.enabled = enabled;
		this.accountNonExpired = accountNonExpired;
		this.credentialsNonExpired = credentialsNonExpired;
		this.accountNonLocked = accountNonLocked;
		this.authorities = Collections.unmodifiableSet(sortAuthorities(authorities));
	}

因此,原因出现了,在使用了@data这个注解的时候,添加了默认的User 无参构造器,而源码中并没有User无参构造器,因此造成了编译错误。

解决办法

//@Data
public class ReturnUserInfo extends User{
	private String username;
	private int userLevel;
	private String role;
	private String loginTime;
	
	
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public int getUserLevel() {
		return userLevel;
	}
	public void setUserLevel(int userLevel) {
		this.userLevel = userLevel;
	}
	public String getRole() {
		return role;
	}
	public void setRole(String role) {
		this.role = role;
	}
	public String getLoginTime() {
		return loginTime;
	}
	public void setLoginTime(String loginTime) {
		this.loginTime = loginTime;
	}
	public ReturnUserInfo(String username, String password, Collection<? extends GrantedAuthority> authorities) {
		super(username, password, authorities);
	}
	public ReturnUserInfo(String username, String password, boolean enabled,
			boolean accountNonExpired, boolean credentialsNonExpired,
			boolean accountNonLocked, Collection<? extends GrantedAuthority> authorities) {
		super(username, password, true, true, true, true, authorities);
	}
	
}

注意:

使用 @Data 时候回变感叹号,感叹号的内容是

Generating equals/hashCode implementation but without a call to superclass, 
even though this class does not extend java.lang.Object. 
If this is intentional, add '@EqualsAndHashCode(callSuper=false)' to your type.

翻译过来是:

生成equals/hashcode实现,但不调用超类,即使此类不扩展java.lang.object。

如果有意这样做,请将“@equalsandhashcode(callsuper=false)”添加到您的类型中。

写一个类的时候,java会自动给这个类提供一个无参构造器。

总结

以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。

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