eclipse环境下：lombok安装及使用

lombok官网：https://projectlombok.org/
jar包下载路径：https://projectlombok.org/download
lombok features：https://projectlombok.org/features/all

lombok：通过注解方式减少POJO类的getter和setter等方法来消除冗余代码量

 

安装
1.下载 lombok.jar
2.官网说是可以双击安装，，，我用这种方法不可行
2.手动安装
（1）将lombok.jar移到eclipse的安装目录

（2）在eclipse.in文件最后加入下面两行

-Xbootclasspath/a:lombok.jar
-javaagent:lombok.jar

=============
-javaagent:xxx.jar 的jar名称 需要与根目录下的jar名一致，
不一致，可能会出现eclipse无法启动的情况。

（3）重启eclipse，进行代码测试

原始java代码：

public class NoteTest {

    private int noteId;
    private String title;
    private String content;
    private int typeId;

}

class文件反编译后：

public class NoteTest
{

    private int noteId;
    private String title;
    private String content;
    private int typeId;

    public NoteTest()
    {

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加入lombok注解后的java代码：

@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString(exclude="typeId")
public class NoteTest {

    private int noteId;
    private String title;
    private String content;
    private int typeId;

}

加注解，经反编译：

public class NoteTest
{

    private int noteId;
    private String title;
    private String content;
    private int typeId;

    public int getNoteId()
    {
        return noteId;
    }

    public String getTitle()
    {
        return title;
    }

    public String getContent()
    {
        return content;
    }

    public int getTypeId()
    {
        return typeId;
    }

    public void setNoteId(int noteId)
    {
        this.noteId = noteId;
    }

    public void setTitle(String title)
    {
        this.title = title;
    }

    public void setContent(String content)
    {
        this.content = content;
    }

    public void setTypeId(int typeId)
    {
        this.typeId = typeId;
    }

    public boolean equals(Object o)
    {
        if (o == this)
            return true;
        if (!(o instanceof NoteTest))
            return false;
        NoteTest other = (NoteTest)o;
        if (!other.canEqual(this))
            return false;
        if (getNoteId() != other.getNoteId())
            return false;
        Object this$title = getTitle();
        Object other$title = other.getTitle();
        if (this$title != null ? !this$title.equals(other$title) : other$title != null)
            return false;
        Object this$content = getContent();
        Object other$content = other.getContent();
        if (this$content != null ? !this$content.equals(other$content) : other$content != null)
            return false;
        return getTypeId() == other.getTypeId();
    }

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

    public int hashCode()
    {
        int PRIME = 59;
        int result = 1;
        result = result * 59 + getNoteId();
        Object $title = getTitle();
        result = result * 59 + ($title != null ? $title.hashCode() : 43);
        Object $content = getContent();
        result = result * 59 + ($content != null ? $content.hashCode() : 43);
        result = result * 59 + getTypeId();
        return result;
    }

    public NoteTest()
    {
    }

    public NoteTest(int noteId, String title, String content, int typeId)
    {
        this.noteId = noteId;
        this.title = title;
        this.content = content;
        this.typeId = typeId;
    }

    public String toString()
    {
        return (new StringBuilder("NoteTest(noteId=")).append(getNoteId()).append(", title=").append(getTitle()).append(", content=").append(getContent()).append(")").toString();
    }
}