lombok：bean注解2

@Data

功能

这是一个综合注解了，等于同时使用

@Getter, @Setter, @ToString, @EqualsAndHashCode,@RequiredArgsConstructor

源码

@Data
public class LombokDemo {

  @NonNull private Integer id;
  private String name;
}

编译后

package xyz.mrwood.study.lombok;

public class LombokDemo {
  private Integer id;
  private String name;

  public LombokDemo() {
  }

  public Integer getId() {
      return this.id;
  }

  public String getName() {
      return this.name;
  }

  public void setId(Integer id) {
      this.id = id;
  }

  public void setName(String name) {
      this.name = name;
  }

  public boolean equals(Object o) {
      if(o == this) {
          return true;
      } else if(!(o instanceof LombokDemo)) {
          return false;
      } else {
          LombokDemo other = (LombokDemo)o;
          if(!other.canEqual(this)) {
              return false;
          } else {
              Integer this$id = this.getId();
              Integer other$id = other.getId();
              if(this$id == null) {
                  if(other$id != null) {
                      return false;
                  }
              } else if(!this$id.equals(other$id)) {
                  return false;
              }

              String this$name = this.getName();
              String other$name = other.getName();
              if(this$name == null) {
                  if(other$name != null) {
                      return false;
                  }
              } else if(!this$name.equals(other$name)) {
                  return false;
              }

              return true;
          }
      }
  }

  protected boolean canEqual(Object other) {
      return other instanceof LombokDemo;
  }

  public int hashCode() {
      boolean PRIME = true;
      byte result = 1;
      Integer $id = this.getId();
      int result1 = result * 59 + ($id == null?43:$id.hashCode());
      String $name = this.getName();
      result1 = result1 * 59 + ($name == null?43:$name.hashCode());
      return result1;
  }

  public String toString() {
      return "LombokDemo(id=" + this.getId() + ", name=" + this.getName() + ")";
  }
}

@Value

功能

不可变类的@Date, 他会默认给属性加上final

源码

@Value
public class LombokDemo {

  private Integer id;
  private String name;
}

编译后

package xyz.mrwood.study.lombok;

import java.beans.ConstructorProperties;

public final class LombokDemo {
  private final Integer id;
  private final String name;

  @ConstructorProperties({"id", "name"})
  public LombokDemo(Integer id, String name) {
      this.id = id;
      this.name = name;
  }

  public Integer getId() {
      return this.id;
  }

  public String getName() {
      return this.name;
  }

  public boolean equals(Object o) {
      if(o == this) {
          return true;
      } else if(!(o instanceof LombokDemo)) {
          return false;
      } else {
          LombokDemo other = (LombokDemo)o;
          Integer this$id = this.getId();
          Integer other$id = other.getId();
          if(this$id == null) {
              if(other$id != null) {
                  return false;
              }
          } else if(!this$id.equals(other$id)) {
              return false;
          }

          String this$name = this.getName();
          String other$name = other.getName();
          if(this$name == null) {
              if(other$name != null) {
                  return false;
              }
          } else if(!this$name.equals(other$name)) {
              return false;
          }

          return true;
      }
  }

  public int hashCode() {
      boolean PRIME = true;
      byte result = 1;
      Integer $id = this.getId();
      int result1 = result * 59 + ($id == null?43:$id.hashCode());
      String $name = this.getName();
      result1 = result1 * 59 + ($name == null?43:$name.hashCode());
      return result1;
  }

  public String toString() {
      return "LombokDemo(id=" + this.getId() + ", name=" + this.getName() + ")";
  }
}

@Accessors

功能

这个注解要搭配@Getter与@Setter使用，用来修改默认的setter与getter方法的形式
注意
@Accessors有三个参数可以使用
1. chain 链式的形式
2. fluent 流式的形式
3. prefix 生成指定前缀的属性的getter与setter方法，并且生成的getter与setter方法时会去除前缀

源码 chain = true

@Accessors(chain = true)
@Setter
@Getter
public class LombokDemo {

  private Integer id;
  private String name;
}

编译后 chain = true

package xyz.mrwood.study.lombok;

public class LombokDemo {
  private Integer id;
  private String name;

  public LombokDemo() {
  }

  public LombokDemo setId(Integer id) {
      this.id = id;
      return this;
  }

  public LombokDemo setName(String name) {
      this.name = name;
      return this;
  }

  public Integer getId() {
      return this.id;
  }

  public String getName() {
      return this.name;
  }
}

源码 fluent = true

@Accessors(fluent = true)
@Setter
@Getter
public class LombokDemo {

  private Integer id;
  private String name;
}

编译后 fluent = true

package xyz.mrwood.study.lombok;

public class LombokDemo {
  private Integer id;
  private String name;

  public LombokDemo() {
  }

  public LombokDemo id(Integer id) {
      this.id = id;
      return this;
  }

  public LombokDemo name(String name) {
      this.name = name;
      return this;
  }

  public Integer id() {
      return this.id;
  }

  public String name() {
      return this.name;
  }
}

源码 prefix = "xxx"

@Accessors(prefix = "xxx")
@Setter
@Getter
public class LombokDemo {

  private Integer xxxId;
  private String name;
}

编译后 prefix = "xxx"

package xyz.mrwood.study.lombok;

public class LombokDemo {
  private Integer xxxId;
  private String name;

  public LombokDemo() {
  }

  public void setId(Integer xxxId) {
      this.xxxId = xxxId;
  }

  public Integer getId() {
      return this.xxxId;
  }
}

参考 https://blog.csdn.net/u011719271/article/details/53842420#sneakythrows

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最后编辑时间为: 2018/09/02 23:26