一開發說項目報錯
java.lang.Long,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.Integer,java.lang.Integer,java.util.Date,java.util.Date,java.lang.Integer,java.lang.Integer,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.Integer 原因: 實際參數列表和形式參數列表長度不同，看報錯信息指向
@Builder奇怪了，怎么builder會報錯？
正文
看報錯信息說是匹配不到全參數的構造函數，因為項目用的是lombok，我的注解如下
已經有默認構造參數了，怎么還會報錯？猜想難道builder默認用的是全參數構造函數？嘗試加了@AllArgsConstructor，果然好了。上網查了下資料
-
The builder annotation creates a so-called 'builder' aspect to the class that is annotated or the class that contains a member which is annotated with @Builder.
-
If a member is annotated, it must be either a constructor or a method. If a class is annotated, then a private constructor is generated with all fields as arguments (as if @AllArgsConstructor(AccessLevel.PRIVATE) is present on the class), and it is as if this constructor has been annotated with @Builder instead.
-
-
The effect of @Builder is that an inner class is generated named TBuilder, with a private constructor. Instances of TBuilder are made with the method named builder() which is also generated for you in the class itself (not in the builder class).
-
-
The TBuilder class contains 1 method for each parameter of the annotated constructor / method (each field, when annotating a class), which returns the builder itself. The builder also has a build() method which returns a completed instance of the original type, created by passing all parameters as set via the various other methods in the builder to the constructor or method that was annotated with @Builder. The return type of this method will be the same as the relevant class, unless a method has been annotated, in which case it'll be equal to the return type of that method.
發現它的實現方式是會對標注這個注解的類的所有成員變量，所以在使用@Builder構建的時候如果不顯式的對某變量賦值的話默認就是null，因為這個變量此時是在Builder
類里的，通過調用build()方法生成具體T類則是通過私有構造函數來實例化，默認是全參數的構造函數。
@Builder默認的實現方式是在類上添加@AllArgsConstructor(access = AccessLevel.PACKAGE)