spring boot security 沒有合適的構造器

bug 出現

  • 在項目中使用spring security 進行用戶登錄驗證,其中,出現了一個問題,久久不能解決
  • 希望給遇到過同樣的問題或者即將遇到這個問題的夥伴,一個參考
  • 項目使用spring boot 和spring security進行開發,程序已經能正常運行,但是在打包項目時,會出現如下的編譯錯誤。
    • 項目打包時,遇到的錯誤,有時編譯過,有時編譯不過,反正各種不能編譯
D5Utils.java:[16,46] sun.misc.BASE64Encoder是內部專用 API, 可能會在未來發行版中刪除
[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] 對於User(沒有參數), 找不到合適的構造器
    構造器 org.springframework.security.core.userdetails.User.User(java.lang.String,java.lang.String,java.util.Collection<? extends org.springframework.security.core.GrantedAuthority>)不適用
      (實際參數列表和形式參數列表長度不同)
    構造器 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>)不適用
      (實際參數列表和形式參數列表長度不同)
[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] 對於User(沒有參數), 找不到合適的構造器
[ERROR] 構造器 org.springframework.security.core.userdetails.User.User(java.lang.String,java.lang.String,java.util.Collection<? extends org.springframework.security.core.GrantedAuthority>)不適用
[ERROR] (實際參數列表和形式參數列表長度不同)
[ERROR] 構造器 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>)不適用
[ERROR] (實際參數列表和形式參數列表長度不同)
[ERROR] -> [Help 1]
[ERROR] 
  • 項目中出現編譯錯誤的代碼如下:
  • 登錄的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("用戶不存在!");
        }
		
		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://管理員
			authorities.add(new SimpleGrantedAuthority("ROLE_ADMIN"));
			System.err.println("用戶權限:ROLE_ADMIN");
			break;
		case 2://普通用戶
			authorities.add(new SimpleGrantedAuthority("ROLE_USER"));
			System.err.println("用戶權限:ROLE_USER");
			break;
		default:
			throw new UsernameNotFoundException("用戶權限配置錯誤");
		}
		System.err.println("進入login登錄驗證");
		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;
	}

}
  • 返回給前端頁面的實體類
@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);
	}
	
}
  • 上述代碼導致了編譯有時成功,有時不成功

問題原因及解決

  • 在 ReturnUserInfo 中使用了 @Data 這個註解,

  • 網上的說法是:

  • @Data 我自己嘗試了下,我們使用 @Data 註解就可以有下面幾個註解的功能: @ToString、@Getter、@Setter、@EqualsAndHashCode、@NoArgsConstructor 。

    • 注意的是,同時使用@Data 和 @AllArgsConstructor 後 ,默認的無參構造函數失效,如果需要它,要重新設置 @NoArgsConstructor
    • 這裏就是爲什麼我們的一個實體類需要加上三個註解
    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    public class WarningInfo {
    	private Picture picture;
    	private Video video;
    }
    
  • 經過查詢User的源碼,發現確實User的這個類沒有無參構造器,只有另外的兩個構造器

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,原因出現了,在使用了@data這個註解的時候,添加了默認的User 無參構造器,而源碼中並沒有User無參構造器,因此造成了編譯錯誤

  • 解決辦法

    • 將@data註解註釋掉,用傳統的set和get方法進行標識,代碼如下,如下操作,便不會在有編譯錯誤
//@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 時候回變感嘆號,感嘆號的內容是
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.
  • 翻譯過來是:生成equals/hashcode實現,但不調用超類,即使此類不擴展java.lang.object。如果有意這樣做,請將“@equalsandhashcode(callsuper=false)”添加到您的類型中。

  • 寫一個類的時候,java會自動給這個類提供一個無參構造器。

  • 本文理解不一定正確,有改善者請提出來







發表評論
所有評論
還沒有人評論,想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.
相關文章