access control allow origin，accessors 作用_@Accessors介紹配置getter和setter

前言

今天在看GitHub某大神寫的代碼的時候看到一個標簽并沒有使用過，所有百度了一下使用方法在此記錄一下。

@Accessors

Accessor的中文含義是存取器，@Accessors用于配置getter和setter方法的生成結果。

源代碼：

access control allow origin？@Target({ElementType.TYPE, ElementType.FIELD})

@Retention(RetentionPolicy.SOURCE)

public @interface Accessors {

/**

* If true, accessors will be named after the field and not include a {@code get} or {@code set}

* prefix. If true and {@code chain} is omitted, {@code chain} defaults to {@code true}.

accesscontrolalloworigin 區別？* default: false

*

* @return Whether or not to make fluent methods (named {@code fieldName()}, not for example {@code setFieldName}).

*/

boolean fluent() default false;

/**

getter和setter方法，* If true, setters return {@code this} instead of {@code void}.

* default: false, unless {@code fluent=true}, then default: true

*

* @return Whether or not setters should return themselves (chaining) or {@code void} (no chaining).

*/

boolean chain() default false;

access control allow origin 配置、/**

* If present, only fields with any of the stated prefixes are given the getter/setter treatment.

* Note that a prefix only counts if the next character is NOT a lowercase character or the last

* letter of the prefix is not a letter (for instance an underscore). If multiple fields

* all turn into the same name when the prefix is stripped, an error will be generated.

*

Mysql、* @return If you are in the habit of prefixing your fields (for example, you name them {@code fFieldName}, specify such prefixes here).

*/

String[] prefix() default {};

}

此注解可以使用在方法上還有類上。

可以看到一共有3個屬性，下面單獨記錄一下各個屬性區別。

string、chain

chain的中文含義是鏈式的，設置為true，則setter方法返回當前對象.

fluent

fluent的時候：getter和setter方法的方法名都是基礎屬性名，且setter方法返回當前對象。生成的方法沒有get/set名字。

prefix

生成getter和setter方法的字段名會忽視指定前綴。可以看到生產的方法中沒有job這個前綴了。